/* Copyright (C) Olivier Bertrand 2004 - 2013 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /** @file ha_connect.cc @brief The ha_connect engine is a stubbed storage engine that enables to create tables based on external data. Principally they are based on plain files of many different types, but also on collections of such files, collection of tables, ODBC tables retrieving data from other DBMS having an ODBC server, and even virtual tables. @details ha_connect will let you create/open/delete tables, the created table can be done specifying an already existing file, the drop table command will just suppress the table definition but not the eventual data file. Indexes are not yet supported but data can be inserted, updated or deleted. You can enable the CONNECT storage engine in your build by doing the following during your build process:<br> ./configure --with-connect-storage-engine (not implemented yet) You can install the CONNECT handler as all other storage handlers. Once this is done, MySQL will let you create tables with:<br> CREATE TABLE <table name> (...) ENGINE=CONNECT; The example storage engine does not use table locks. It implements an example "SHARE" that is inserted into a hash by table name. This is not used yet. Please read the object definition in ha_connect.h before reading the rest of this file. @note This MariaDB CONNECT handler is currently an adaptation of the XDB handler that was written for MySQL version 4.1.2-alpha. Its overall design should be enhanced in the future to meet MariaDB requirements. @note It was written also from the Brian's ha_example handler and contains parts of it that are there but not currently used, such as table variables. @note When you create an CONNECT table, the MySQL Server creates a table .frm (format) file in the database directory, using the table name as the file name as is customary with MySQL. No other files are created. To get an idea of what occurs, here is an example select that would do a scan of an entire table: @code ha-connect::open ha_connect::store_lock ha_connect::external_lock ha_connect::info ha_connect::rnd_init ha_connect::extra ENUM HA_EXTRA_CACHE Cache record in HA_rrnd() ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::rnd_next ha_connect::extra ENUM HA_EXTRA_NO_CACHE End caching of records (def) ha_connect::external_lock ha_connect::extra ENUM HA_EXTRA_RESET Reset database to after open @endcode Here you see that the connect storage engine has 9 rows called before rnd_next signals that it has reached the end of its data. Calls to ha_connect::extra() are hints as to what will be occuring to the request. Happy use!<br> -Olivier */ #ifdef USE_PRAGMA_IMPLEMENTATION #pragma implementation // gcc: Class implementation #endif #define MYSQL_SERVER 1 #define DONT_DEFINE_VOID //#include "sql_partition.h" #include "sql_class.h" #include "create_options.h" #include "mysql_com.h" #include "field.h" #undef OFFSET #define NOPARSE #if defined(UNIX) #include "osutil.h" #endif // UNIX #include "global.h" #include "plgdbsem.h" #include "reldef.h" #include "tabcol.h" #include "xindex.h" #include "connect.h" #include "user_connect.h" #include "ha_connect.h" #include "mycat.h" #define PLGINI "plugdb.ini" /* Configuration settings file */ #define PLGXINI "plgcnx.ini" /* Configuration settings file */ #define my_strupr(p) my_caseup_str(default_charset_info, (p)); #define my_strlwr(p) my_casedn_str(default_charset_info, (p)); #define my_stricmp(a, b) my_strcasecmp(default_charset_info, (a), (b)) #if defined (WIN32) typedef struct _WMIutil *PWMIUT; /* Used to call WMIColumns */ #endif /****************************************************************************/ /* CONNECT functions called externally. */ /****************************************************************************/ bool CntCheckDB(PGLOBAL g, PHC handler, const char *pathname); PTDB CntGetTDB(PGLOBAL g, const char *name, MODE xmod, PHC); bool CntOpenTable(PGLOBAL g, PTDB tdbp, MODE, char *, char *, bool, PHC); bool CntRewindTable(PGLOBAL g, PTDB tdbp); int CntCloseTable(PGLOBAL g, PTDB tdbp); int CntIndexInit(PGLOBAL g, PTDB tdbp, int id); RCODE CntReadNext(PGLOBAL g, PTDB tdbp); RCODE CntIndexRead(PGLOBAL g, PTDB, OPVAL op, const void *k, int n); RCODE CntWriteRow(PGLOBAL g, PTDB tdbp); RCODE CntUpdateRow(PGLOBAL g, PTDB tdbp); RCODE CntDeleteRow(PGLOBAL g, PTDB tdbp, bool all); bool CntInfo(PGLOBAL g, PTDB tdbp, PXF info); int CntIndexRange(PGLOBAL g, PTDB ptdb, const uchar* *key, uint *len, bool *incl, key_part_map *kmap); #ifdef LIBXML2_SUPPORT void XmlInitParserLib(void); void XmlCleanupParserLib(void); #endif // LIBXML2_SUPPORT /****************************************************************************/ /* Functions called externally by pre_parser. */ /****************************************************************************/ PQRYRES DBFColumns(PGLOBAL g, char *fn, BOOL info); PQRYRES CSVColumns(PGLOBAL g, char *fn, char sep, char q, int hdr, int mxr); #if defined(ODBC_SUPPORT) PQRYRES MyODBCCols(PGLOBAL g, char *tab, char *dsn, bool info); #endif // ODBC_SUPPORT #if defined(MYSQL_SUPPORT) PQRYRES ODBCDataSources(PGLOBAL g, bool info = true); PQRYRES MyColumns(PGLOBAL g, char *host, char *db, char *user, char *pwd, char *table, char *colpat, int port, bool key); #endif // MYSQL_SUPPORT enum enum_field_types PLGtoMYSQL(int type, bool gdf); #if defined(WIN32) PQRYRES WMIColumns(PGLOBAL g, char *nsp, char *classname, PWMIUT wp= NULL); #endif // WIN32 char GetTypeID(char *type); bool check_string_char_length(LEX_STRING *str, const char *err_msg, uint max_char_length, CHARSET_INFO *cs, bool no_error); /***********************************************************************/ /* DB static variables. */ /***********************************************************************/ extern "C" char plgxini[]; extern "C" char plgini[]; extern "C" char nmfile[]; extern "C" char pdebug[]; extern "C" { char version[]= "Version 1.00.0005 October 03, 2012"; #if defined(XMSG) char msglang[]; // Default message language #endif int trace= 0; // The general trace value } // extern "C" /****************************************************************************/ /* Initialize the ha_connect static members. */ /****************************************************************************/ char connectini[_MAX_PATH]= "connect.ini"; int xtrace= 0; ulong ha_connect::num= 0; //int DTVAL::Shift= 0; static handler *connect_create_handler(handlerton *hton, TABLE_SHARE *table, MEM_ROOT *mem_root); handlerton *connect_hton; /* Variables for connect share methods */ /* Hash used to track the number of open tables; variable for connect share methods */ static HASH connect_open_tables; /* The mutex used to init the hash; variable for example share methods */ mysql_mutex_t connect_mutex; /** structure for CREATE TABLE options (table options) These can be specified in the CREATE TABLE: CREATE TABLE ( ... ) {...here...} */ struct ha_table_option_struct { const char *type; const char *filename; const char *optname; const char *tabname; const char *tablist; const char *dbname; const char *separator; //const char *connect; const char *qchar; const char *module; const char *subtype; const char *info; const char *oplist; int lrecl; int elements; //int estimate; int multiple; int header; int quoted; int ending; int compressed; bool mapped; bool huge; bool split; bool readonly; }; #if defined(MARIADB) ha_create_table_option connect_table_option_list[]= { // These option are for stand alone Connect tables HA_TOPTION_STRING("TABLE_TYPE", type), HA_TOPTION_STRING("FILE_NAME", filename), HA_TOPTION_STRING("XFILE_NAME", optname), //HA_TOPTION_STRING("CONNECT_STRING", connect), HA_TOPTION_STRING("TABNAME", tabname), HA_TOPTION_STRING("TABLE_LIST", tablist), HA_TOPTION_STRING("DB_NAME", dbname), HA_TOPTION_STRING("SEP_CHAR", separator), HA_TOPTION_STRING("QCHAR", qchar), HA_TOPTION_STRING("MODULE", module), HA_TOPTION_STRING("SUBTYPE", subtype), HA_TOPTION_STRING("INFO", info), HA_TOPTION_STRING("OPTION_LIST", oplist), HA_TOPTION_NUMBER("LRECL", lrecl, 0, 0, INT_MAX32, 1), HA_TOPTION_NUMBER("BLOCK_SIZE", elements, 0, 0, INT_MAX32, 1), //HA_TOPTION_NUMBER("ESTIMATE", estimate, 0, 0, INT_MAX32, 1), HA_TOPTION_NUMBER("MULTIPLE", multiple, 0, 0, 2, 1), HA_TOPTION_NUMBER("HEADER", header, 0, 0, 3, 1), HA_TOPTION_NUMBER("QUOTED", quoted, -1, 0, 3, 1), HA_TOPTION_NUMBER("ENDING", ending, -1, 0, INT_MAX32, 1), HA_TOPTION_NUMBER("COMPRESS", compressed, 0, 0, 2, 1), //HA_TOPTION_BOOL("COMPRESS", compressed, 0), HA_TOPTION_BOOL("MAPPED", mapped, 0), HA_TOPTION_BOOL("HUGE", huge, 0), HA_TOPTION_BOOL("SPLIT", split, 0), HA_TOPTION_BOOL("READONLY", readonly, 0), HA_TOPTION_END }; #endif // MARIADB /** structure for CREATE TABLE options (field options) These can be specified in the CREATE TABLE per field: CREATE TABLE ( field ... {...here...}, ... ) */ struct ha_field_option_struct { int offset; int freq; // Not used by this version int opt; // Not used by this version int buflen; const char *dateformat; const char *fieldformat; char *special; }; #if defined(MARIADB) ha_create_table_option connect_field_option_list[]= { HA_FOPTION_NUMBER("FLAG", offset, -1, 0, INT_MAX32, 1), HA_FOPTION_NUMBER("FREQUENCY", freq, 0, 0, INT_MAX32, 1), // not used HA_FOPTION_NUMBER("OPT_VALUE", opt, 0, 0, 2, 1), // used for indexing HA_FOPTION_NUMBER("BUF_LENGTH", buflen, 0, 0, INT_MAX32, 1), HA_FOPTION_STRING("DATE_FORMAT", dateformat), HA_FOPTION_STRING("FIELD_FORMAT", fieldformat), HA_FOPTION_STRING("SPECIAL", special), HA_FOPTION_END }; #endif // MARIADB /** @brief Function we use in the creation of our hash to get key. */ static uchar* connect_get_key(CONNECT_SHARE *share, size_t *length, my_bool not_used __attribute__((unused))) { *length=share->table_name_length; return (uchar*) share->table_name; } #ifdef HAVE_PSI_INTERFACE static PSI_mutex_key ex_key_mutex_connect, ex_key_mutex_CONNECT_SHARE_mutex; static PSI_mutex_info all_connect_mutexes[]= { { &ex_key_mutex_connect, "connect", PSI_FLAG_GLOBAL}, { &ex_key_mutex_CONNECT_SHARE_mutex, "CONNECT_SHARE::mutex", 0} }; /***********************************************************************/ /* Push G->Message as a MySQL warning. */ /***********************************************************************/ bool PushWarning(PGLOBAL g, PTDBASE tdbp) { PHC phc; THD *thd; MYCAT *cat= (MYCAT*)tdbp->GetDef()->GetCat(); if (!cat || !(phc= cat->GetHandler()) || !phc->GetTable() || !(thd= (phc->GetTable())->in_use)) return true; push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 0, g->Message); return false; } // end of PushWarning static void init_connect_psi_keys() { const char* category= "connect"; int count; if (PSI_server == NULL) return; count= array_elements(all_connect_mutexes); PSI_server->register_mutex(category, all_connect_mutexes, count); } #endif static int connect_init_func(void *p) { DBUG_ENTER("connect_init_func"); #ifdef HAVE_PSI_INTERFACE init_connect_psi_keys(); #endif connect_hton= (handlerton *)p; mysql_mutex_init(ex_key_mutex_connect, &connect_mutex, MY_MUTEX_INIT_FAST); //VOID(mysql_mutex_init(&connect_mutex, MY_MUTEX_INIT_FAST)); (void) my_hash_init(&connect_open_tables, system_charset_info, 32, 0, 0, (my_hash_get_key) connect_get_key, 0, 0); //connect_hton->name= "CONNECT"; connect_hton->state= SHOW_OPTION_YES; //connect_hton->comment= "CONNECT handler"; connect_hton->create= connect_create_handler; connect_hton->flags= HTON_TEMPORARY_NOT_SUPPORTED | HTON_NO_PARTITION; #if defined(MARIADB) connect_hton->db_type= DB_TYPE_AUTOASSIGN; connect_hton->table_options= connect_table_option_list; connect_hton->field_options= connect_field_option_list; #else // !MARIADB //connect_hton->system_database= connect_system_database; //connect_hton->is_supported_system_table= connect_is_supported_system_table; #endif // !MARIADB if (xtrace) printf("connect_init: hton=%p\n", p); DTVAL::SetTimeShift(); // Initialize time zone shift once for all DBUG_RETURN(0); } static int connect_done_func(void *p) { int error= 0; PCONNECT pc, pn; DBUG_ENTER("connect_done_func"); if (connect_open_tables.records) error= 1; for (pc= user_connect::to_users; pc; pc= pn) { if (pc->g) PlugCleanup(pc->g, true); pn= pc->next; delete pc; } // endfor pc my_hash_free(&connect_open_tables); mysql_mutex_destroy(&connect_mutex); DBUG_RETURN(error); } /** @brief Example of simple lock controls. The "share" it creates is a structure we will pass to each example handler. Do you have to have one of these? Well, you have pieces that are used for locking, and they are needed to function. */ static CONNECT_SHARE *get_share(const char *table_name, TABLE *table) { CONNECT_SHARE *share; uint length; char *tmp_name; mysql_mutex_lock(&connect_mutex); length=(uint) strlen(table_name); if (!(share=(CONNECT_SHARE*)my_hash_search(&connect_open_tables, (uchar*) table_name, length))) { if (!(share=(CONNECT_SHARE *)my_multi_malloc(MYF(MY_WME | MY_ZEROFILL), &share, sizeof(*share), &tmp_name, length+1, NullS))) { mysql_mutex_unlock(&connect_mutex); return NULL; } // endif share share->use_count=0; share->table_name_length=length; share->table_name=tmp_name; strmov(share->table_name, table_name); if (my_hash_insert(&connect_open_tables, (uchar*) share)) goto error; thr_lock_init(&share->lock); mysql_mutex_init(ex_key_mutex_CONNECT_SHARE_mutex, &share->mutex, MY_MUTEX_INIT_FAST); } // endif share share->use_count++; mysql_mutex_unlock(&connect_mutex); return share; error: mysql_mutex_destroy(&share->mutex); my_free(share); return NULL; } /** @brief Free lock controls. We call this whenever we close a table. If the table had the last reference to the share, then we free memory associated with it. */ static int free_share(CONNECT_SHARE *share) { mysql_mutex_lock(&connect_mutex); if (!--share->use_count) { my_hash_delete(&connect_open_tables, (uchar*) share); thr_lock_delete(&share->lock); mysql_mutex_destroy(&share->mutex); #if !defined(MARIADB) my_free(share->table_options); my_free(share->field_options); #endif // !MARIADB my_free(share); } // endif share mysql_mutex_unlock(&connect_mutex); return 0; } static handler* connect_create_handler(handlerton *hton, TABLE_SHARE *table, MEM_ROOT *mem_root) { handler *h= new (mem_root) ha_connect(hton, table); if (xtrace) printf("New CONNECT %p, table: %s\n", h, table ? table->table_name.str : "<null>"); return h; } // end of connect_create_handler /****************************************************************************/ /* ha_connect constructor. */ /****************************************************************************/ ha_connect::ha_connect(handlerton *hton, TABLE_SHARE *table_arg) :handler(hton, table_arg) { hnum= ++num; xp= NULL; // Tested in next call xp= (table) ? GetUser(table->in_use) : NULL; tdbp= NULL; sdval= NULL; xmod= MODE_ANY; istable= false; //*tname= '\0'; bzero((char*) &xinfo, sizeof(XINFO)); valid_info= false; valid_query_id= 0; creat_query_id= (table && table->in_use) ? table->in_use->query_id : 0; stop= false; //hascond= false; indexing= -1; data_file_name= NULL; index_file_name= NULL; enable_activate_all_index= 0; int_table_flags= (HA_NO_TRANSACTIONS | HA_NO_PREFIX_CHAR_KEYS); ref_length= sizeof(int); #if !defined(MARIADB) share= NULL; table_options= NULL; field_options= NULL; #endif // !MARIADB tshp= NULL; } // end of ha_connect constructor /****************************************************************************/ /* ha_connect destructor. */ /****************************************************************************/ ha_connect::~ha_connect(void) { if (xp) { PCONNECT p; xp->count--; for (p= user_connect::to_users; p; p= p->next) if (p == xp) break; if (p && !p->count) { if (p->next) p->next->previous= p->previous; if (p->previous) p->previous->next= p->next; else user_connect::to_users= p->next; } // endif p if (!xp->count) { PlugCleanup(xp->g, true); delete xp; } // endif count } // endif xp #if !defined(MARIADB) my_free(table_options); my_free(field_options); #endif // !MARIADB } // end of ha_connect destructor /****************************************************************************/ /* Get a pointer to the user of this handler. */ /****************************************************************************/ PCONNECT ha_connect::GetUser(THD *thd) { const char *dbn= NULL; if (!thd) return NULL; if (xp && thd == xp->thdp) return xp; for (xp= user_connect::to_users; xp; xp= xp->next) if (thd == xp->thdp) break; if (!xp) { xp= new user_connect(thd, dbn); if (xp->user_init(this)) { delete xp; xp= NULL; } // endif user_init } else xp->count++; return xp; } // end of GetUser /****************************************************************************/ /* Get the global pointer of the user of this handler. */ /****************************************************************************/ PGLOBAL ha_connect::GetPlug(THD *thd) { PCONNECT lxp= GetUser(thd); return (lxp) ? lxp->g : NULL; } // end of GetPlug /****************************************************************************/ /* Return the value of an option specified in the option list. */ /****************************************************************************/ char *ha_connect::GetListOption(char *opname, const char *oplist, char *def) { char key[16], val[256]; char *pk, *pv, *pn; char *opval= def; int n; for (pk= (char*)oplist; ; pk= ++pn) { pn= strchr(pk, ','); pv= strchr(pk, '='); if (pv && (!pn || pv < pn)) { n= pv - pk; memcpy(key, pk, n); key[n]= 0; pv++; if (pn) { n= pn - pv; memcpy(val, pv, n); val[n]= 0; } else strcpy(val, pv); } else { if (pn) { n= pn - pk; memcpy(key, pk, n); key[n]= 0; } else strcpy(key, pk); val[0]= 0; } // endif pv if (!stricmp(opname, key)) { opval= (char*)PlugSubAlloc(xp->g, NULL, strlen(val) + 1); strcpy(opval, val); break; } else if (!pn) break; } // endfor pk return opval; } // end of GetListOption /****************************************************************************/ /* Return the table option structure. */ /****************************************************************************/ PTOS ha_connect::GetTableOptionStruct(TABLE *tab) { #if defined(MARIADB) return (tshp) ? tshp->option_struct : tab->s->option_struct; #else // !MARIADB if (share && share->table_options) return share->table_options; else if (table_options) return table_options; char *pk, *pv, *pn, *val; size_t len= sizeof(ha_table_option_struct) + tab->s->comment.length + 1; PTOS top= (PTOS)my_malloc(len, MYF(MY_FAE | MY_ZEROFILL)); top->quoted= -1; // Default value top->ending= -1; // Default value pk= (char *)top + sizeof(ha_table_option_struct); memcpy(pk, tab->s->comment.str, tab->s->comment.length); for (; pk; pk= ++pn) { pn= strchr(pk, ','); pv= strchr(pk, '='); if (pn) *pn= 0; if (pv) *pv= 0; val= (pv && (!pn || pv < pn)) ? pv + 1 : ""; if (!stricmp(pk, "type") || !stricmp(pk, "Table_Type")) { top->type= val; } else if (!stricmp(pk, "fn") || !stricmp(pk, "filename") || !stricmp(pk, "File_Name")) { top->filename= val; } else if (!stricmp(pk, "optfn") || !stricmp(pk, "optname") || !stricmp(pk, "Xfile_Name")) { top->optname= val; } else if (!stricmp(pk, "name") || !stricmp(pk, "tabname")) { top->tabname= val; } else if (!stricmp(pk, "tablist") || !stricmp(pk, "tablelist") || !stricmp(pk, "Table_list")) { top->tablist= val; } else if (!stricmp(pk, "sep") || !stricmp(pk, "separator") || !stricmp(pk, "Sep_Char")) { top->separator= val; } else if (!stricmp(pk, "db") || !stricmp(pk, "database") || !stricmp(pk, "DB_Name")) { top->dbname= val; } else if (!stricmp(pk, "qchar")) { top->qchar= val; } else if (!stricmp(pk, "module")) { top->module= val; } else if (!stricmp(pk, "subtype")) { top->subtype= val; } else if (!stricmp(pk, "lrecl")) { top->lrecl= atoi(val); } else if (!stricmp(pk, "elements")) { top->elements= atoi(val); } else if (!stricmp(pk, "multiple")) { top->multiple= atoi(val); } else if (!stricmp(pk, "header")) { top->header= atoi(val); } else if (!stricmp(pk, "quoted")) { top->quoted= atoi(val); } else if (!stricmp(pk, "ending")) { top->ending= atoi(val); } else if (!stricmp(pk, "compressed")) { top->compressed= atoi(val); } else if (!stricmp(pk, "mapped")) { top->mapped= (!*val || *val == 'y' || *val == 'Y' || atoi(val) != 0); } else if (!stricmp(pk, "huge")) { top->huge= (!*val || *val == 'y' || *val == 'Y' || atoi(val) != 0); } else if (!stricmp(pk, "split")) { top->split= (!*val || *val == 'y' || *val == 'Y' || atoi(val) != 0); } else if (!stricmp(pk, "readonly") || !stricmp(pk, "protected")) { top->readonly= (!*val || *val == 'y' || *val == 'Y' || atoi(val) != 0); } // endif's if (!pn) break; } // endfor pk // This to get all other options top->oplist= tab->s->comment.str; if (share) share->table_options= top; else table_options= top; return top; #endif // !MARIADB } // end of GetTableOptionStruct /****************************************************************************/ /* Return the value of a string option or NULL if not specified. */ /****************************************************************************/ char *ha_connect::GetStringOption(char *opname, char *sdef) { char *opval= NULL; PTOS options= GetTableOptionStruct(table); if (!options) ; else if (!stricmp(opname, "Type")) opval= (char*)options->type; else if (!stricmp(opname, "Filename")) opval= (char*)options->filename; else if (!stricmp(opname, "Optname")) opval= (char*)options->optname; else if (!stricmp(opname, "Tabname")) opval= (char*)options->tabname; else if (!stricmp(opname, "Tablist")) opval= (char*)options->tablist; else if (!stricmp(opname, "Database")) opval= (char*)options->dbname; else if (!stricmp(opname, "Separator")) opval= (char*)options->separator; else if (!stricmp(opname, "Connect")) // opval= (char*)options->connect; opval= table->s->connect_string.str; else if (!stricmp(opname, "Qchar")) opval= (char*)options->qchar; else if (!stricmp(opname, "Module")) opval= (char*)options->module; else if (!stricmp(opname, "Subtype")) opval= (char*)options->subtype; else if (!stricmp(opname, "Info")) opval= (char*)options->info; if (!opval && options->oplist) opval= GetListOption(opname, options->oplist); if (!opval) { if (sdef && !strcmp(sdef, "*")) { // Return the handler default value if (!stricmp(opname, "Database")) opval= (char*)GetDBName(NULL); // Current database } else opval= sdef; // Caller default } // endif !opval return opval; } // end of GetStringOption /****************************************************************************/ /* Return the value of a Boolean option or bdef if not specified. */ /****************************************************************************/ bool ha_connect::GetBooleanOption(char *opname, bool bdef) { bool opval= bdef; char *pv; PTOS options= GetTableOptionStruct(table); if (!options) ; else if (!stricmp(opname, "Mapped")) opval= options->mapped; else if (!stricmp(opname, "Huge")) opval= options->huge; //else if (!stricmp(opname, "Compressed")) // opval= options->compressed; else if (!stricmp(opname, "Split")) opval= options->split; else if (!stricmp(opname, "Readonly")) opval= options->readonly; else if (options->oplist) if ((pv= GetListOption(opname, options->oplist))) opval= (!*pv || *pv == 'y' || *pv == 'Y' || atoi(pv) != 0); return opval; } // end of GetBooleanOption /****************************************************************************/ /* Return the value of an integer option or NO_IVAL if not specified. */ /****************************************************************************/ int ha_connect::GetIntegerOption(char *opname) { int opval= NO_IVAL; char *pv; PTOS options= GetTableOptionStruct(table); if (!options) ; else if (!stricmp(opname, "Lrecl")) opval= options->lrecl; else if (!stricmp(opname, "Elements")) opval= options->elements; else if (!stricmp(opname, "Estimate")) // opval= options->estimate; opval= (int)table->s->max_rows; else if (!stricmp(opname, "Avglen")) opval= (int)table->s->avg_row_length; else if (!stricmp(opname, "Multiple")) opval= options->multiple; else if (!stricmp(opname, "Header")) opval= options->header; else if (!stricmp(opname, "Quoted")) opval= options->quoted; else if (!stricmp(opname, "Ending")) opval= options->ending; else if (!stricmp(opname, "Compressed")) opval= (options->compressed); if (opval == NO_IVAL && options->oplist) if ((pv= GetListOption(opname, options->oplist))) opval= atoi(pv); return opval; } // end of GetIntegerOption /****************************************************************************/ /* Set the value of the opname option (does not work for oplist options) */ /* Currently used only to set the Lrecl value. */ /****************************************************************************/ bool ha_connect::SetIntegerOption(char *opname, int n) { PTOS options= GetTableOptionStruct(table); if (!options) return true; if (!stricmp(opname, "Lrecl")) options->lrecl= n; else if (!stricmp(opname, "Elements")) options->elements= n; //else if (!stricmp(opname, "Estimate")) // options->estimate= n; else if (!stricmp(opname, "Multiple")) options->multiple= n; else if (!stricmp(opname, "Header")) options->header= n; else if (!stricmp(opname, "Quoted")) options->quoted= n; else if (!stricmp(opname, "Ending")) options->ending= n; else if (!stricmp(opname, "Compressed")) options->compressed= n; else return true; //else if (options->oplist) // SetListOption(opname, options->oplist, n); return false; } // end of SetIntegerOption /****************************************************************************/ /* Return a field option structure. */ /****************************************************************************/ PFOS ha_connect::GetFieldOptionStruct(Field *fdp) { #if defined(MARIADB) return fdp->option_struct; #else // !MARIADB if (share && share->field_options) return &share->field_options[fdp->field_index]; else if (field_options) return &field_options[fdp->field_index]; char *pc, *pk, *pv, *pn, *val; int i, k, n= table->s->fields; size_t len= n + n * sizeof(ha_field_option_struct); PFOS fp, fop; for (i= 0; i < n; i++) len+= table->s->field[i]->comment.length; fop= (PFOS)my_malloc(len, MYF(MY_FAE | MY_ZEROFILL)); pc= (char*)fop + n * sizeof(ha_field_option_struct); for (i= k= 0; i < n; i++) { fp= &fop[i]; fp->offset= -1; // Default value if (!table->s->field[i]->comment.length) continue; memcpy(pc, table->s->field[i]->comment.str, table->s->field[i]->comment.length); for (pk= pc; pk; pk= ++pn) { if ((pn= strchr(pk, ','))) *pn= 0; if ((pv= strchr(pk, '='))) *pv= 0; val= (pv && (!pn || pv < pn)) ? pv + 1 : ""; if (!stricmp(pk, "datefmt") || !stricmp(pk, "date_format")) { fp->dateformat= val; } else if (!stricmp(pk, "fieldfmt") || !stricmp(pk, "field_format")) { fp->fieldformat= val; } else if (!stricmp(pk, "special")) { fp->special= val; } else if (!stricmp(pk, "offset") || !stricmp(pk, "flag")) { fp->offset= atoi(val); } else if (!stricmp(pk, "freq")) { fp->freq= atoi(val); } else if (!stricmp(pk, "opt")) { fp->opt= atoi(val); } else if (!stricmp(pk, "buflen")) { fp->buflen= atoi(val); } // endif's if (!pn) break; } // endfor pk pc+= table->s->field[i]->comment.length + 1; } // endfor i if (share) share->field_options= fop; else field_options= fop; return &fop[fdp->field_index]; #endif // !MARIADB } // end of GetFildOptionStruct /****************************************************************************/ /* Returns the column description structure used to make the column. */ /****************************************************************************/ void *ha_connect::GetColumnOption(void *field, PCOLINFO pcf) { const char *cp; int len; ha_field_option_struct *fop; Field* fp; Field* *fldp; // Double test to be on the safe side if (!table) return NULL; // Find the column to describe if (field) { fldp= (Field**)field; fldp++; } else fldp= (tshp) ? tshp->field : table->field; if (!(fp= *fldp)) return NULL; // Get the CONNECT field options structure fop= GetFieldOptionStruct(fp); pcf->Flags= 0; // Now get column information if (fop && fop->special) { pcf->Name= "*"; return fldp; } else pcf->Name= (char*)fp->field_name; pcf->Prec= 0; pcf->Opt= (fop) ? fop->opt : 0; if ((pcf->Length= fp->field_length) < 0) pcf->Length= 256; // BLOB? switch (fp->type()) { case MYSQL_TYPE_BLOB: case MYSQL_TYPE_VARCHAR: pcf->Flags |= U_VAR; case MYSQL_TYPE_STRING: pcf->Type= TYPE_STRING; // Do something for case cp= fp->charset()->name; // Find if collation name ends by _ci if (!strcmp(cp + strlen(cp) - 3, "_ci")) { pcf->Prec= 1; // Case insensitive pcf->Opt= 0; // Prevent index opt until it is safe } // endif ci break; case MYSQL_TYPE_LONG: pcf->Type= TYPE_INT; break; case MYSQL_TYPE_SHORT: pcf->Type= TYPE_SHORT; break; case MYSQL_TYPE_DOUBLE: case MYSQL_TYPE_FLOAT: pcf->Type= TYPE_FLOAT; pcf->Prec= max(min(fp->decimals(), ((unsigned)pcf->Length - 2)), 0); break; case MYSQL_TYPE_DATE: case MYSQL_TYPE_TIME: case MYSQL_TYPE_DATETIME: case MYSQL_TYPE_TIMESTAMP: pcf->Type= TYPE_DATE; break; case MYSQL_TYPE_LONGLONG: pcf->Type= TYPE_BIGINT; break; default: pcf->Type=TYPE_ERROR; } // endswitch type // This is used to skip null bit if (fp->real_maybe_null()) pcf->Flags |= U_NULLS; #if defined(MARIADB) // Mark virtual columns as such if (fp->vcol_info && !fp->stored_in_db) pcf->Flags |= U_VIRTUAL; #endif // MARIADB pcf->Key= 0; // Not used when called from MySQL pcf->Remark= fp->comment.str; if (fop) { pcf->Offset= fop->offset; // pcf->Freq= fop->freq; pcf->Datefmt= (char*)fop->dateformat; pcf->Fieldfmt= (char*)fop->fieldformat; // This is useful in particular for date columns if ((len= fop->buflen) > pcf->Length) pcf->Length= len; } else { pcf->Offset= -1; // pcf->Freq= 0; pcf->Datefmt= NULL; pcf->Fieldfmt= NULL; } // endif fop return fldp; } // end of GetColumnOption /****************************************************************************/ /* Returns the index description structure used to make the index. */ /****************************************************************************/ PIXDEF ha_connect::GetIndexInfo(int n) { char *name, *pn; bool unique; PIXDEF xdp= NULL; PKPDEF kpp, pkp= NULL; PGLOBAL& g= xp->g; KEY kp; // Find the index to describe if ((unsigned)n < table->s->keynames.count) // kp= table->key_info[n]; which one ??? kp= table->s->key_info[n]; else return NULL; // Now get index information pn= (char*)table->s->keynames.type_names[n]; name= (char*)PlugSubAlloc(g, NULL, strlen(pn) + 1); strcpy(name, pn); // This is probably unuseful unique= (kp.flags & 1) != 0; // Allocate the index description block xdp= new(g) INDEXDEF(name, unique, n); // Get the the key parts info for (int k= 0; (unsigned)k < kp.key_parts; k++) { pn= (char*)kp.key_part[k].field->field_name; name= (char*)PlugSubAlloc(g, NULL, strlen(pn) + 1); strcpy(name, pn); // This is probably unuseful // Allocate the key part description block kpp= new(g) KPARTDEF(name, k + 1); kpp->SetKlen(kp.key_part[k].length); // Index on auto increment column is an XXROW index if (kp.key_part[k].field->flags & AUTO_INCREMENT_FLAG && kp.key_parts == 1) xdp->SetAuto(true); if (pkp) pkp->SetNext(kpp); else xdp->SetToKeyParts(kpp); pkp= kpp; } // endfor k xdp->SetNParts(kp.key_parts); return xdp; } // end of GetIndexInfo const char *ha_connect::GetDBName(const char* name) { return (name) ? name : table->s->db.str; } // end of GetDBName const char *ha_connect::GetTableName(void) { return table->s->table_name.str; } // end of GetTableName /****************************************************************************/ /* Returns the column real or special name length of a field. */ /****************************************************************************/ int ha_connect::GetColNameLen(Field *fp) { int n; PFOS fop= GetFieldOptionStruct(fp); // Now get the column name length if (fop && fop->special) n= strlen(fop->special) + 1; else n= strlen(fp->field_name); return n; } // end of GetColNameLen /****************************************************************************/ /* Returns the column real or special name of a field. */ /****************************************************************************/ char *ha_connect::GetColName(Field *fp) { PFOS fop= GetFieldOptionStruct(fp); return (fop && fop->special) ? fop->special : (char*)fp->field_name; } // end of GetColName /****************************************************************************/ /* Adds the column real or special name of a field to a string. */ /****************************************************************************/ void ha_connect::AddColName(char *cp, Field *fp) { PFOS fop= GetFieldOptionStruct(fp); // Now add the column name if (fop && fop->special) // The prefix * mark the column as "special" strcat(strcpy(cp, "*"), strupr(fop->special)); else strcpy(cp, (char*)fp->field_name); } // end of AddColName /****************************************************************************/ /* Get the table description block of a CONNECT table. */ /****************************************************************************/ PTDB ha_connect::GetTDB(PGLOBAL g) { const char *table_name; PTDB tp; // Double test to be on the safe side if (!g || !table) return NULL; table_name= GetTableName(); if (tdbp && !stricmp(tdbp->GetName(), table_name) && tdbp->GetMode() == xmod && !xp->CheckQuery(valid_query_id)) { tp= tdbp; tp->SetMode(xmod); } else if ((tp= CntGetTDB(g, table_name, xmod, this))) valid_query_id= xp->last_query_id; else printf("GetTDB: %s\n", g->Message); return tp; } // end of GetTDB /****************************************************************************/ /* Open a CONNECT table, restricting column list if cols is true. */ /****************************************************************************/ bool ha_connect::OpenTable(PGLOBAL g, bool del) { bool rc= false; char *c1= NULL, *c2=NULL; // Double test to be on the safe side if (!g || !table) { printf("OpenTable logical error; g=%p table=%p\n", g, table); return true; } // endif g if (!(tdbp= GetTDB(g))) return true; // Get the list of used fields (columns) char *p; unsigned int k1, k2, n1, n2; Field* *field; MY_BITMAP *map= (xmod != MODE_INSERT) ? table->read_set : table->write_set; MY_BITMAP *ump= (xmod == MODE_UPDATE) ? table->write_set : NULL; k1= k2= 0; n1= n2= 1; // 1 is space for final null character for (field= table->field; *field; field++) { if (bitmap_is_set(map, (*field)->field_index)) { n1+= (GetColNameLen(*field) + 1); k1++; } // endif if (ump && bitmap_is_set(ump, (*field)->field_index)) { n2+= (GetColNameLen(*field) + 1); k2++; } // endif } // endfor field if (k1) { p= c1= (char*)PlugSubAlloc(g, NULL, n1); for (field= table->field; *field; field++) if (bitmap_is_set(map, (*field)->field_index)) { AddColName(p, *field); p+= (strlen(p) + 1); } // endif used field *p= '\0'; // mark end of list } // endif k1 if (k2) { p= c2= (char*)PlugSubAlloc(g, NULL, n2); for (field= table->field; *field; field++) if (bitmap_is_set(ump, (*field)->field_index)) { AddColName(p, *field); p+= (strlen(p) + 1); } // endif used field *p= '\0'; // mark end of list } // endif k2 // Open the table if (!(rc= CntOpenTable(g, tdbp, xmod, c1, c2, del, this))) { istable= true; // strmake(tname, table_name, sizeof(tname)-1); if (xmod == MODE_ANY && stop && *tdbp->GetName() != '#') { // We are in a create index query if (!((PTDBASE)tdbp)->GetDef()->Indexable()) { sprintf(g->Message, "Table %s cannot be indexed", tdbp->GetName()); rc= true; } else if (xp) // xp can be null when called from create xp->tabp= (PTDBDOS)tdbp; // The table on which the index is created } // endif xmod // tdbp->SetOrig((PTBX)table); // used by CheckCond } else printf("OpenTable: %s\n", g->Message); if (rc) { tdbp= NULL; valid_info= false; } // endif rc return rc; } // end of OpenTable /****************************************************************************/ /* IsOpened: returns true if the table is already opened. */ /****************************************************************************/ bool ha_connect::IsOpened(void) { return (!xp->CheckQuery(valid_query_id) && tdbp && tdbp->GetUse() == USE_OPEN); } // end of IsOpened /****************************************************************************/ /* Close a CONNECT table. */ /****************************************************************************/ int ha_connect::CloseTable(PGLOBAL g) { int rc= CntCloseTable(g, tdbp); tdbp= NULL; sdval=NULL; valid_info= false; indexing= -1; return rc; } // end of CloseTable /***********************************************************************/ /* Make a pseudo record from current row values. Specific to MySQL. */ /***********************************************************************/ int ha_connect::MakeRecord(char *buf) { char *p, *fmt, val[32]; int rc= 0; Field* *field; Field *fp; my_bitmap_map *org_bitmap; CHARSET_INFO *charset; const MY_BITMAP *map; PVAL value; PCOL colp= NULL; DBUG_ENTER("ha_connect::MakeRecord"); if (xtrace > 1) #if defined(MARIADB) printf("Maps: read=%p write=%p vcol=%p defr=%p defw=%p\n", *table->read_set->bitmap, *table->write_set->bitmap, *table->vcol_set->bitmap, *table->def_read_set.bitmap, *table->def_write_set.bitmap); #else // !MARIADB printf("Maps: read=%p write=%p defr=%p defw=%p\n", *table->read_set->bitmap, *table->write_set->bitmap, *table->def_read_set.bitmap, *table->def_write_set.bitmap); #endif // !MARIADB // Avoid asserts in field::store() for columns that are not updated org_bitmap= dbug_tmp_use_all_columns(table, table->write_set); // This is for variable_length rows memset(buf, 0, table->s->null_bytes); // store needs a charset, why not this one? charset= table->s->table_charset; // When sorting read_set selects all columns, so we use def_read_set map= (const MY_BITMAP *)&table->def_read_set; // Make the pseudo record from field values for (field= table->field; *field && !rc; field++) { fp= *field; #if defined(MARIADB) if (fp->vcol_info && !fp->stored_in_db) continue; // This is a virtual column #endif // MARIADB if (bitmap_is_set(map, fp->field_index)) { // This is a used field, fill the buffer with value for (colp= tdbp->GetColumns(); colp; colp= colp->GetNext()) if (!stricmp(colp->GetName(), GetColName(fp))) break; if (!colp) { printf("Column %s not found\n", fp->field_name); dbug_tmp_restore_column_map(table->write_set, org_bitmap); DBUG_RETURN(HA_ERR_WRONG_IN_RECORD); } // endif colp value= colp->GetValue(); // All this could be better optimized if (value->GetType() == TYPE_DATE) { if (!sdval) sdval= AllocateValue(xp->g, TYPE_STRING, 20); switch (fp->type()) { case MYSQL_TYPE_DATE: fmt= "%Y-%m-%d"; break; case MYSQL_TYPE_TIME: fmt= "%H:%M:%S"; break; default: fmt= "%Y-%m-%d %H:%M:%S"; } // endswitch type // Get date in the format required by MySQL fields value->FormatValue(sdval, fmt); p= sdval->GetCharValue(); } else if (value->GetType() == TYPE_FLOAT) p= NULL; else p= value->GetCharString(val); if (p) { if (fp->store(p, strlen(p), charset, CHECK_FIELD_WARN)) { // Avoid "error" on null fields if (value->GetIntValue()) rc= HA_ERR_WRONG_IN_RECORD; DBUG_PRINT("MakeRecord", (p)); } // endif store } else if (fp->store(value->GetFloatValue())) { rc= HA_ERR_WRONG_IN_RECORD; DBUG_PRINT("MakeRecord", (value->GetCharString(val))); } // endif store } // endif bitmap } // endfor field // This is copied from ha_tina and is necessary to avoid asserts dbug_tmp_restore_column_map(table->write_set, org_bitmap); DBUG_RETURN(rc); } // end of MakeRecord /***********************************************************************/ /* Set row values from a MySQL pseudo record. Specific to MySQL. */ /***********************************************************************/ int ha_connect::ScanRecord(PGLOBAL g, uchar *buf) { char attr_buffer[1024]; int rc= 0; PCOL colp; PVAL value; Field *fp; PTDBASE tp= (PTDBASE)tdbp; String attribute(attr_buffer, sizeof(attr_buffer), table->s->table_charset); my_bitmap_map *bmap= dbug_tmp_use_all_columns(table, table->read_set); // Scan the pseudo record for field values and set column values for (Field **field=table->field ; *field ; field++) { fp= *field; #if defined(MARIADB) if ((fp->vcol_info && !fp->stored_in_db) || fp->option_struct->special) continue; // Is a virtual column possible here ??? #endif // MARIADB if (bitmap_is_set(table->write_set, fp->field_index)) { for (colp= tp->GetSetCols(); colp; colp= colp->GetNext()) if (!stricmp(colp->GetName(), fp->field_name)) break; if (!colp) { printf("Column %s not found\n", fp->field_name); rc= HA_ERR_WRONG_IN_RECORD; goto err; } else value= colp->GetValue(); // This is a used field, fill the value from the row buffer // All this could be better optimized switch (value->GetType()) { case TYPE_FLOAT: value->SetValue(fp->val_real()); break; case TYPE_DATE: if (!sdval) { sdval= (DTVAL*)AllocateValue(xp->g, TYPE_DATE, 19); // Get date in the format produced by MySQL fields ((DTVAL*)sdval)->SetFormat(g, "YYYY-MM-DD hh:mm:ss", 19); } // endif sdval fp->val_str(&attribute); sdval->SetValue_psz(attribute.c_ptr()); value->SetValue_pval(sdval); break; default: fp->val_str(&attribute); value->SetValue_psz(attribute.c_ptr()); } // endswitch Type #ifdef NEWCHANGE } else if (xmod == MODE_UPDATE) { PCOL cp; for (cp= tp->GetColumns(); cp; cp= cp->GetNext()) if (!stricmp(colp->GetName(), cp->GetName())) break; if (!cp) { rc= HA_ERR_WRONG_IN_RECORD; goto err; } // endif cp value->SetValue_pval(cp->GetValue()); } else // mode Insert value->Reset(); #else } // endif bitmap_is_set #endif } // endfor field err: dbug_tmp_restore_column_map(table->read_set, bmap); return rc; } // end of ScanRecord /***********************************************************************/ /* Check change in index column. Specific to MySQL. */ /* Should be elaborated to check for real changes. */ /***********************************************************************/ int ha_connect::CheckRecord(PGLOBAL g, const uchar *oldbuf, uchar *newbuf) { return ScanRecord(g, newbuf); } // end of dummy CheckRecord /***********************************************************************/ /* Return the string representing an operator. */ /***********************************************************************/ char *ha_connect::GetValStr(OPVAL vop, bool neg) { char *val; switch (vop) { case OP_EQ: val= " = "; break; case OP_NE: val= " <> "; break; case OP_GT: val= " > "; break; case OP_GE: val= " >= "; break; case OP_LT: val= " < "; break; case OP_LE: val= " <= "; break; case OP_IN: val= (neg) ? " NOT IN (" : " IN ("; break; case OP_NULL: val= " IS NULL"; break; case OP_LIKE: val= " LIKE "; break; case OP_XX: val= " BETWEEN "; break; case OP_EXIST: val= " EXISTS "; break; case OP_AND: val= " AND "; break; case OP_OR: val= " OR "; break; case OP_NOT: val= " NOT "; break; case OP_CNC: val= " || "; break; case OP_ADD: val= " + "; break; case OP_SUB: val= " - "; break; case OP_MULT: val= " * "; break; case OP_DIV: val= " / "; break; default: val= " ? "; } /* endswitch */ return val; } // end of GetValStr /***********************************************************************/ /* Check the WHERE condition and return an ODBC/WQL filter. */ /***********************************************************************/ PFIL ha_connect::CheckCond(PGLOBAL g, PFIL filp, AMT tty, Item *cond) { unsigned int i; bool ismul= false; PPARM pfirst= NULL, pprec= NULL, pp[2]= {NULL, NULL}; OPVAL vop= OP_XX; if (!cond) return NULL; if (xtrace > 1) printf("Cond type=%d\n", cond->type()); if (cond->type() == COND::COND_ITEM) { char *p1, *p2; Item_cond *cond_item= (Item_cond *)cond; if (xtrace > 1) printf("Cond: Ftype=%d name=%s\n", cond_item->functype(), cond_item->func_name()); switch (cond_item->functype()) { case Item_func::COND_AND_FUNC: vop= OP_AND; break; case Item_func::COND_OR_FUNC: vop= OP_OR; break; default: return NULL; } // endswitch functype List<Item>* arglist= cond_item->argument_list(); List_iterator<Item> li(*arglist); Item *subitem; p1= filp + strlen(filp); strcpy(p1, "("); p2= p1 + 1; for (i= 0; i < arglist->elements; i++) if ((subitem= li++)) { if (!CheckCond(g, filp, tty, subitem)) { if (vop == OP_OR) return NULL; else *p2= 0; } else { p1= p2 + strlen(p2); strcpy(p1, GetValStr(vop, FALSE)); p2= p1 + strlen(p1); } // endif CheckCond } else return NULL; if (*p1 != '(') strcpy(p1, ")"); else return NULL; } else if (cond->type() == COND::FUNC_ITEM) { unsigned int i; // int n; bool iscol, neg= FALSE; Item_func *condf= (Item_func *)cond; Item* *args= condf->arguments(); if (xtrace > 1) printf("Func type=%d argnum=%d\n", condf->functype(), condf->argument_count()); // neg= condf-> switch (condf->functype()) { case Item_func::EQUAL_FUNC: case Item_func::EQ_FUNC: vop= OP_EQ; break; case Item_func::NE_FUNC: vop= OP_NE; break; case Item_func::LT_FUNC: vop= OP_LT; break; case Item_func::LE_FUNC: vop= OP_LE; break; case Item_func::GE_FUNC: vop= OP_GE; break; case Item_func::GT_FUNC: vop= OP_GT; break; case Item_func::IN_FUNC: vop= OP_IN; neg= ((Item_func_opt_neg *)condf)->negated; case Item_func::BETWEEN: ismul= true; break; default: return NULL; } // endswitch functype if (condf->argument_count() < 2) return NULL; else if (ismul && tty == TYPE_AM_WMI) return NULL; // Not supported by WQL for (i= 0; i < condf->argument_count(); i++) { if (xtrace > 1) printf("Argtype(%d)=%d\n", i, args[i]->type()); if (i >= 2 && !ismul) { if (xtrace > 1) printf("Unexpected arg for vop=%d\n", vop); continue; } // endif i if ((iscol= args[i]->type() == COND::FIELD_ITEM)) { const char *fnm; ha_field_option_struct *fop; Item_field *pField= (Item_field *)args[i]; if (pField->field->table != table) return NULL; // Field does not belong to this table else fop= GetFieldOptionStruct(pField->field); if (fop && fop->special) { if (tty == TYPE_AM_TBL && !stricmp(fop->special, "TABID")) fnm= "TABID"; else return NULL; } else if (tty == TYPE_AM_TBL) return NULL; else fnm= pField->field->field_name; if (xtrace > 1) { printf("Field index=%d\n", pField->field->field_index); printf("Field name=%s\n", pField->field->field_name); } // endif xtrace // IN and BETWEEN clauses should be col VOP list if (i && ismul) return NULL; strcat(filp, fnm); } else { char buff[256]; String *res, tmp(buff,sizeof(buff), &my_charset_bin); Item_basic_constant *pval= (Item_basic_constant *)args[i]; if ((res= pval->val_str(&tmp)) == NULL) return NULL; // To be clarified if (xtrace > 1) printf("Value=%.*s\n", res->length(), res->ptr()); // IN and BETWEEN clauses should be col VOP list if (!i && ismul) return NULL; // Append the value to the filter if (args[i]->type() == COND::STRING_ITEM) strcat(strcat(strcat(filp, "'"), res->ptr()), "'"); else strncat(filp, res->ptr(), res->length()); } // endif if (!i) strcat(filp, GetValStr(vop, neg)); else if (vop == OP_XX && i == 1) strcat(filp, " AND "); else if (vop == OP_IN) strcat(filp, (i == condf->argument_count() - 1) ? ")" : ","); } // endfor i } else { if (xtrace > 1) printf("Unsupported condition\n"); return NULL; } // endif's type return filp; } // end of CheckCond /** Push condition down to the table handler. @param cond Condition to be pushed. The condition tree must not be modified by the caller. @return The 'remainder' condition that caller must use to filter out records. NULL means the handler will not return rows that do not match the passed condition. @note CONNECT handles the filtering only for table types that construct an SQL or WQL query, but still leaves it to MySQL because only some parts of the filter may be relevant. The first suballocate finds the position where the string will be constructed in the sarea. The second one does make the suballocation with the proper length. */ const COND *ha_connect::cond_push(const COND *cond) { DBUG_ENTER("ha_connect::cond_push"); if (tdbp) { AMT tty= tdbp->GetAmType(); if (tty == TYPE_AM_WMI || tty == TYPE_AM_ODBC || tty == TYPE_AM_TBL || tty == TYPE_AM_MYSQL) { PGLOBAL& g= xp->g; PFIL filp= (PFIL)PlugSubAlloc(g, NULL, 0); *filp= 0; if (CheckCond(g, filp, tty, (Item *)cond)) { if (xtrace) puts(filp); tdbp->SetFilter(filp); // cond= NULL; // This does not work anyway PlugSubAlloc(g, NULL, strlen(filp) + 1); } // endif filp } // endif tty } // endif tdbp // Let MySQL do the filtering DBUG_RETURN(cond); } // end of cond_push /** Number of rows in table. It will only be called if (table_flags() & (HA_HAS_RECORDS | HA_STATS_RECORDS_IS_EXACT)) != 0 */ ha_rows ha_connect::records() { if (!valid_info) info(HA_STATUS_VARIABLE); if (tdbp && tdbp->Cardinality(NULL)) return stats.records; else return HA_POS_ERROR; } // end of records /** Return an error message specific to this handler. @param error error code previously returned by handler @param buf pointer to String where to add error message @return Returns true if this is a temporary error */ bool ha_connect::get_error_message(int error, String* buf) { DBUG_ENTER("ha_connect::get_error_message"); if (xp && xp->g) buf->copy(xp->g->Message, (uint)strlen(xp->g->Message), system_charset_info); DBUG_RETURN(false); } // end of get_error_message /** @brief If frm_error() is called then we will use this to determine the file extensions that exist for the storage engine. This is also used by the default rename_table and delete_table method in handler.cc. For engines that have two file name extentions (separate meta/index file and data file), the order of elements is relevant. First element of engine file name extentions array should be meta/index file extention. Second element - data file extention. This order is assumed by prepare_for_repair() when REPAIR TABLE ... USE_FRM is issued. @note: PlugDB will handle all file creation/deletion. When dropping a CONNECT table, we don't want the PlugDB table to be dropped or erased. Therefore we provide a void list of extensions. @see rename_table method in handler.cc and delete_table method in handler.cc */ static const char *ha_connect_exts[]= { NullS }; const char **ha_connect::bas_ext() const { return ha_connect_exts; // a null list, see @note above } // end of bas_ext /** @brief Used for opening tables. The name will be the name of the file. @details A table is opened when it needs to be opened; e.g. when a request comes in for a SELECT on the table (tables are not open and closed for each request, they are cached). Called from handler.cc by handler::ha_open(). The server opens all tables by calling ha_open() which then calls the handler specific open(). @note For CONNECT no open can be done here because field information is not yet updated. >>>>> TO BE CHECKED <<<<< (Thread information could be get by using 'ha_thd') @see handler::ha_open() in handler.cc */ int ha_connect::open(const char *name, int mode, uint test_if_locked) { int rc= 0; DBUG_ENTER("ha_connect::open"); if (xtrace) printf("open: name=%s mode=%d test=%ud\n", name, mode, test_if_locked); if (!(share= get_share(name, table))) DBUG_RETURN(1); thr_lock_data_init(&share->lock,&lock,NULL); // Try to get the user if possible if (table && table->in_use) { PGLOBAL g= GetPlug(table->in_use); // Try to set the database environment if (g) rc= (CntCheckDB(g, this, name)) ? (-2) : 0; } // endif table DBUG_RETURN(rc); } // end of open /** @brief Make the indexes for this table */ int ha_connect::optimize(THD* thd, HA_CHECK_OPT* check_opt) { int rc= 0; PGLOBAL& g= xp->g; PDBUSER dup= PlgGetUser(g); // Ignore error on the opt file dup->Check &= ~CHK_OPT; tdbp= GetTDB(g); dup->Check |= CHK_OPT; if (tdbp || (tdbp= GetTDB(g))) { if (!((PTDBASE)tdbp)->GetDef()->Indexable()) { sprintf(g->Message, "Table %s is not indexable", tdbp->GetName()); rc= RC_INFO; } else rc= ((PTDBASE)tdbp)->ResetTableOpt(g, true); } else rc= HA_ERR_INTERNAL_ERROR; return rc; } // end of optimize /** @brief Closes a table. We call the free_share() function to free any resources that we have allocated in the "shared" structure. @details Called from sql_base.cc, sql_select.cc, and table.cc. In sql_select.cc it is only used to close up temporary tables or during the process where a temporary table is converted over to being a myisam table. For sql_base.cc look at close_data_tables(). @see sql_base.cc, sql_select.cc and table.cc */ int ha_connect::close(void) { int rc= 0; DBUG_ENTER("ha_connect::close"); // If this is called by a later query, the table may have // been already closed and the tdbp is not valid anymore. if (tdbp && xp->last_query_id == valid_query_id) rc= CloseTable(xp->g); DBUG_RETURN(free_share(share) || rc); } // end of close /** @brief write_row() inserts a row. No extra() hint is given currently if a bulk load is happening. buf() is a byte array of data. You can use the field information to extract the data from the native byte array type. @details Example of this would be: @code for (Field **field=table->field ; *field ; field++) { ... } @endcode See ha_tina.cc for an example of extracting all of the data as strings. ha_berekly.cc has an example of how to store it intact by "packing" it for ha_berkeley's own native storage type. See the note for update_row() on auto_increments and timestamps. This case also applies to write_row(). Called from item_sum.cc, item_sum.cc, sql_acl.cc, sql_insert.cc, sql_insert.cc, sql_select.cc, sql_table.cc, sql_udf.cc, and sql_update.cc. @see item_sum.cc, item_sum.cc, sql_acl.cc, sql_insert.cc, sql_insert.cc, sql_select.cc, sql_table.cc, sql_udf.cc and sql_update.cc */ int ha_connect::write_row(uchar *buf) { int rc= 0; PGLOBAL& g= xp->g; DBUG_ENTER("ha_connect::write_row"); // Open the table if it was not opened yet (possible ???) if (!IsOpened()) if (OpenTable(g)) { if (strstr(g->Message, "read only")) rc= HA_ERR_TABLE_READONLY; else rc= HA_ERR_INITIALIZATION; DBUG_RETURN(rc); } // endif tdbp if (tdbp->GetMode() == MODE_ANY) DBUG_RETURN(0); // Set column values from the passed pseudo record if ((rc= ScanRecord(g, buf))) DBUG_RETURN(rc); // Return result code from write operation if (CntWriteRow(g, tdbp)) { DBUG_PRINT("write_row", (g->Message)); printf("write_row: %s\n", g->Message); rc= HA_ERR_INTERNAL_ERROR; } // endif RC DBUG_RETURN(rc); } // end of write_row /** @brief Yes, update_row() does what you expect, it updates a row. old_data will have the previous row record in it, while new_data will have the newest data in it. Keep in mind that the server can do updates based on ordering if an ORDER BY clause was used. Consecutive ordering is not guaranteed. @details Currently new_data will not have an updated auto_increament record, or and updated timestamp field. You can do these for example by doing: @code if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE) table->timestamp_field->set_time(); if (table->next_number_field && record == table->record[0]) update_auto_increment(); @endcode Called from sql_select.cc, sql_acl.cc, sql_update.cc, and sql_insert.cc. @see sql_select.cc, sql_acl.cc, sql_update.cc and sql_insert.cc */ int ha_connect::update_row(const uchar *old_data, uchar *new_data) { int rc= 0; PGLOBAL& g= xp->g; DBUG_ENTER("ha_connect::update_row"); if (xtrace > 1) printf("update_row: old=%s new=%s\n", old_data, new_data); // Check values for possible change in indexed column if ((rc= CheckRecord(g, old_data, new_data))) return rc; if (CntUpdateRow(g, tdbp)) { DBUG_PRINT("update_row", (g->Message)); printf("update_row CONNECT: %s\n", g->Message); rc= HA_ERR_INTERNAL_ERROR; } // endif RC DBUG_RETURN(rc); } // end of update_row /** @brief This will delete a row. buf will contain a copy of the row to be deleted. The server will call this right after the current row has been called (from either a previous rnd_nexT() or index call). @details If you keep a pointer to the last row or can access a primary key it will make doing the deletion quite a bit easier. Keep in mind that the server does not guarantee consecutive deletions. ORDER BY clauses can be used. Called in sql_acl.cc and sql_udf.cc to manage internal table information. Called in sql_delete.cc, sql_insert.cc, and sql_select.cc. In sql_select it is used for removing duplicates while in insert it is used for REPLACE calls. @see sql_acl.cc, sql_udf.cc, sql_delete.cc, sql_insert.cc and sql_select.cc */ int ha_connect::delete_row(const uchar *buf) { int rc= 0; DBUG_ENTER("ha_connect::delete_row"); if (CntDeleteRow(xp->g, tdbp, false)) { rc= HA_ERR_INTERNAL_ERROR; printf("delete_row CONNECT: %s\n", xp->g->Message); } // endif DeleteRow DBUG_RETURN(rc); } // end of delete_row /****************************************************************************/ /* We seem to come here at the begining of an index use. */ /****************************************************************************/ int ha_connect::index_init(uint idx, bool sorted) { int rc; PGLOBAL& g= xp->g; DBUG_ENTER("index_init"); if ((rc= rnd_init(0))) return rc; indexing= CntIndexInit(g, tdbp, (signed)idx); if (indexing <= 0) { DBUG_PRINT("index_init", (g->Message)); printf("index_init CONNECT: %s\n", g->Message); active_index= (uint)-1; rc= -1; } else { if (((PTDBDOX)tdbp)->To_Kindex->GetNum_K()) { if (((PTDBASE)tdbp)->GetFtype() != RECFM_NAF) ((PTDBDOX)tdbp)->GetTxfp()->ResetBuffer(g); active_index= idx; } else // Void table indexing= 0; rc= 0; } // endif indexing DBUG_RETURN(rc); } // end of index_init /****************************************************************************/ /* We seem to come here at the end of an index use. */ /****************************************************************************/ int ha_connect::index_end() { DBUG_ENTER("index_end"); active_index= -1; DBUG_RETURN(rnd_end()); } // end of index_end /****************************************************************************/ /* This is internally called by all indexed reading functions. */ /****************************************************************************/ int ha_connect::ReadIndexed(uchar *buf, OPVAL op, const uchar *key, uint key_len) { int rc; //statistic_increment(ha_read_key_count, &LOCK_status); switch (CntIndexRead(xp->g, tdbp, op, key, (int)key_len)) { case RC_OK: xp->fnd++; rc= MakeRecord((char*)buf); break; case RC_EF: // End of file rc= HA_ERR_END_OF_FILE; break; case RC_NF: // Not found xp->nfd++; rc= (op == OP_SAME) ? HA_ERR_END_OF_FILE : HA_ERR_KEY_NOT_FOUND; break; default: // Read error DBUG_PRINT("ReadIndexed", (xp->g->Message)); printf("ReadIndexed: %s\n", xp->g->Message); rc= HA_ERR_INTERNAL_ERROR; } // endswitch RC if (xtrace > 1) printf("ReadIndexed: op=%d rc=%d\n", op, rc); table->status= (rc == RC_OK) ? 0 : STATUS_NOT_FOUND; return rc; } // end of ReadIndexed #ifdef NOT_USED /** @brief Positions an index cursor to the index specified in the handle. Fetches the row if available. If the key value is null, begin at the first key of the index. */ int ha_connect::index_read_map(uchar *buf, const uchar *key, key_part_map keypart_map __attribute__((unused)), enum ha_rkey_function find_flag __attribute__((unused))) { DBUG_ENTER("ha_connect::index_read"); DBUG_RETURN(HA_ERR_WRONG_COMMAND); } #endif // NOT_USED /****************************************************************************/ /* This is called by handler::index_read_map. */ /****************************************************************************/ int ha_connect::index_read(uchar * buf, const uchar * key, uint key_len, enum ha_rkey_function find_flag) { int rc; OPVAL op= OP_XX; DBUG_ENTER("ha_connect::index_read"); switch(find_flag) { case HA_READ_KEY_EXACT: op= OP_EQ; break; case HA_READ_AFTER_KEY: op= OP_GT; break; case HA_READ_KEY_OR_NEXT: op= OP_GE; break; default: DBUG_RETURN(-1); } // endswitch find_flag if (xtrace > 1) printf("%p index_read: op=%d\n", this, op); if (indexing > 0) rc= ReadIndexed(buf, op, key, key_len); else rc= -1; DBUG_RETURN(rc); } // end of index_read /** @brief Used to read forward through the index. */ int ha_connect::index_next(uchar *buf) { int rc; DBUG_ENTER("ha_connect::index_next"); //statistic_increment(ha_read_next_count, &LOCK_status); if (indexing > 0) rc= ReadIndexed(buf, OP_NEXT); else if (!indexing) rc= rnd_next(buf); else rc= -1; DBUG_RETURN(rc); } // end of index_next #ifdef NOT_USED /** @brief Used to read backwards through the index. */ int ha_connect::index_prev(uchar *buf) { DBUG_ENTER("ha_connect::index_prev"); DBUG_RETURN(HA_ERR_WRONG_COMMAND); } #endif // NOT_USED /** @brief index_first() asks for the first key in the index. @details Called from opt_range.cc, opt_sum.cc, sql_handler.cc, and sql_select.cc. @see opt_range.cc, opt_sum.cc, sql_handler.cc and sql_select.cc */ int ha_connect::index_first(uchar *buf) { int rc; DBUG_ENTER("ha_connect::index_first"); if (indexing > 0) rc= ReadIndexed(buf, OP_FIRST); else if (indexing < 0) rc= -1; else if (CntRewindTable(xp->g, tdbp)) { table->status= STATUS_NOT_FOUND; rc= -1; } else rc= rnd_next(buf); DBUG_RETURN(rc); } // end of index_first #ifdef NOT_USED /** @brief index_last() asks for the last key in the index. @details Called from opt_range.cc, opt_sum.cc, sql_handler.cc, and sql_select.cc. @see opt_range.cc, opt_sum.cc, sql_handler.cc and sql_select.cc */ int ha_connect::index_last(uchar *buf) { DBUG_ENTER("ha_connect::index_last"); DBUG_RETURN(HA_ERR_WRONG_COMMAND); } #endif // NOT_USED /****************************************************************************/ /* This is called to get more rows having the same index value. */ /****************************************************************************/ int ha_connect::index_next_same(uchar *buf, const uchar *key, uint keylen) { int rc; DBUG_ENTER("ha_connect::index_next_same"); //statistic_increment(ha_read_next_count, &LOCK_status); if (!indexing) rc= rnd_next(buf); else if (indexing > 0) rc= ReadIndexed(buf, OP_SAME); else rc= -1; DBUG_RETURN(rc); } // end of index_next_same /** @brief rnd_init() is called when the system wants the storage engine to do a table scan. See the example in the introduction at the top of this file to see when rnd_init() is called. @details Called from filesort.cc, records.cc, sql_handler.cc, sql_select.cc, sql_table.cc, and sql_update.cc. @note We always call open and extern_lock/start_stmt before comming here. @see filesort.cc, records.cc, sql_handler.cc, sql_select.cc, sql_table.cc and sql_update.cc */ int ha_connect::rnd_init(bool scan) { PGLOBAL g= ((table && table->in_use) ? GetPlug(table->in_use) : (xp) ? xp->g : NULL); DBUG_ENTER("ha_connect::rnd_init"); if (xtrace) printf("%p in rnd_init: scan=%d\n", this, scan); if (g) { // Open the table if it was not opened yet (possible ???) if (!IsOpened()) { if (!table || xmod == MODE_INSERT) DBUG_RETURN(HA_ERR_INITIALIZATION); if (OpenTable(g, xmod == MODE_DELETE)) #if defined(MARIADB) DBUG_RETURN(HA_ERR_INITIALIZATION); #else // !MARIADB DBUG_RETURN(HA_ERR_INTERNAL_ERROR); #endif // !MARIADB } else void(CntRewindTable(g, tdbp)); // Read from beginning } // endif g xp->nrd= xp->fnd= xp->nfd= 0; xp->tb1= my_interval_timer(); DBUG_RETURN(0); } // end of rnd_init /** @brief Not described. @note The previous version said: Stop scanning of table. Note that this may be called several times during execution of a sub select. =====> This has been moved to external lock to avoid closing subselect tables. */ int ha_connect::rnd_end() { int rc= 0; DBUG_ENTER("ha_connect::rnd_end"); // If this is called by a later query, the table may have // been already closed and the tdbp is not valid anymore. // if (tdbp && xp->last_query_id == valid_query_id) // rc= CloseTable(xp->g); DBUG_RETURN(rc); } // end of rnd_end /** @brief This is called for each row of the table scan. When you run out of records you should return HA_ERR_END_OF_FILE. Fill buff up with the row information. The Field structure for the table is the key to getting data into buf in a manner that will allow the server to understand it. @details Called from filesort.cc, records.cc, sql_handler.cc, sql_select.cc, sql_table.cc, and sql_update.cc. @see filesort.cc, records.cc, sql_handler.cc, sql_select.cc, sql_table.cc and sql_update.cc */ int ha_connect::rnd_next(uchar *buf) { int rc; DBUG_ENTER("ha_connect::rnd_next"); //statistic_increment(ha_read_rnd_next_count, &LOCK_status); #if !defined(MARIADB) if (!tdbp) // MySQL ignores error from rnd_init DBUG_RETURN(HA_ERR_INTERNAL_ERROR); #endif // !MARIADB if (tdbp->GetMode() == MODE_ANY) { // We will stop on next read if (!stop) { stop= true; DBUG_RETURN(RC_OK); } else DBUG_RETURN(HA_ERR_END_OF_FILE); } // endif Mode switch (CntReadNext(xp->g, tdbp)) { case RC_OK: rc= MakeRecord((char*)buf); break; case RC_EF: // End of file rc= HA_ERR_END_OF_FILE; break; case RC_NF: // Not found rc= HA_ERR_RECORD_DELETED; break; default: // Read error printf("rnd_next CONNECT: %s\n", xp->g->Message); rc= (records()) ? HA_ERR_INTERNAL_ERROR : HA_ERR_END_OF_FILE; break; } // endswitch RC #ifndef DBUG_OFF if (rc || !(xp->nrd++ % 16384)) { ulonglong tb2= my_interval_timer(); double elapsed= (double) (tb2 - xp->tb1) / 1000000000ULL; DBUG_PRINT("rnd_next", ("rc=%d nrd=%u fnd=%u nfd=%u sec=%.3lf\n", rc, xp->nrd, xp->fnd, xp->nfd, elapsed)); xp->tb1= tb2; xp->fnd= xp->nfd= 0; } // endif nrd #endif table->status= (!rc) ? 0 : STATUS_NOT_FOUND; DBUG_RETURN(rc); } // end of rnd_next /** @brief position() is called after each call to rnd_next() if the data needs to be ordered. You can do something like the following to store the position: @code my_store_ptr(ref, ref_length, current_position); @endcode @details The server uses ref to store data. ref_length in the above case is the size needed to store current_position. ref is just a byte array that the server will maintain. If you are using offsets to mark rows, then current_position should be the offset. If it is a primary key like in BDB, then it needs to be a primary key. Called from filesort.cc, sql_select.cc, sql_delete.cc, and sql_update.cc. @see filesort.cc, sql_select.cc, sql_delete.cc and sql_update.cc */ void ha_connect::position(const uchar *record) { DBUG_ENTER("ha_connect::position"); if (((PTDBASE)tdbp)->GetDef()->Indexable()) my_store_ptr(ref, ref_length, (my_off_t)((PTDBASE)tdbp)->GetRecpos()); DBUG_VOID_RETURN; } // end of position /** @brief This is like rnd_next, but you are given a position to use to determine the row. The position will be of the type that you stored in ref. You can use my_get_ptr(pos,ref_length) to retrieve whatever key or position you saved when position() was called. @details Called from filesort.cc, records.cc, sql_insert.cc, sql_select.cc, and sql_update.cc. @note Is this really useful? It was never called even when sorting. @see filesort.cc, records.cc, sql_insert.cc, sql_select.cc and sql_update.cc */ int ha_connect::rnd_pos(uchar *buf, uchar *pos) { int rc; PTDBASE tp= (PTDBASE)tdbp; DBUG_ENTER("ha_connect::rnd_pos"); if (!tp->SetRecpos(xp->g, (int)my_get_ptr(pos, ref_length))) rc= rnd_next(buf); else rc= HA_ERR_KEY_NOT_FOUND; DBUG_RETURN(rc); } // end of rnd_pos /** @brief ::info() is used to return information to the optimizer. See my_base.h for the complete description. @details Currently this table handler doesn't implement most of the fields really needed. SHOW also makes use of this data. You will probably want to have the following in your code: @code if (records < 2) records= 2; @endcode The reason is that the server will optimize for cases of only a single record. If, in a table scan, you don't know the number of records, it will probably be better to set records to two so you can return as many records as you need. Along with records, a few more variables you may wish to set are: records deleted data_file_length index_file_length delete_length check_time Take a look at the public variables in handler.h for more information. Called in filesort.cc, ha_heap.cc, item_sum.cc, opt_sum.cc, sql_delete.cc, sql_delete.cc, sql_derived.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_show.cc, sql_show.cc, sql_show.cc, sql_show.cc, sql_table.cc, sql_union.cc, and sql_update.cc. @see filesort.cc, ha_heap.cc, item_sum.cc, opt_sum.cc, sql_delete.cc, sql_delete.cc, sql_derived.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_select.cc, sql_show.cc, sql_show.cc, sql_show.cc, sql_show.cc, sql_table.cc, sql_union.cc and sql_update.cc */ int ha_connect::info(uint flag) { bool pure= false; PGLOBAL g= GetPlug((table) ? table->in_use : NULL); DBUG_ENTER("ha_connect::info"); if (xtrace) printf("%p In info: flag=%u valid_info=%d\n", this, flag, valid_info); if (!valid_info) { // tdbp must be available to get updated info if (!tdbp || xp->CheckQuery(valid_query_id)) { if (xmod == MODE_ANY) { // Pure info, not a query pure= true; // xmod= MODE_READ; } // endif xmod // tdbp= OpenTable(g, xmod == MODE_DELETE); tdbp= GetTDB(g); } // endif tdbp valid_info= CntInfo(g, tdbp, &xinfo); } // endif valid_info if (flag & HA_STATUS_VARIABLE) { stats.records= xinfo.records; stats.deleted= 0; stats.data_file_length= xinfo.data_file_length; stats.index_file_length= 0; stats.delete_length= 0; stats.check_time= 0; stats.mean_rec_length= xinfo.mean_rec_length; } // endif HA_STATUS_VARIABLE if (flag & HA_STATUS_CONST) { // This is imported from the previous handler and must be reconsidered stats.max_data_file_length= LL(4294967295); stats.max_index_file_length= LL(4398046510080); stats.create_time= 0; data_file_name= xinfo.data_file_name; index_file_name= NULL; // sortkey= (uint) - 1; // Table is not sorted ref_length= sizeof(int); // Pointer size to row table->s->db_options_in_use= 03; stats.block_size= 1024; table->s->keys_in_use.set_prefix(table->s->keys); table->s->keys_for_keyread= table->s->keys_in_use; // table->s->keys_for_keyread.subtract(table->s->read_only_keys); table->s->db_record_offset= 0; } // endif HA_STATUS_CONST if (flag & HA_STATUS_ERRKEY) { errkey= 0; } // endif HA_STATUS_ERRKEY if (flag & HA_STATUS_TIME) stats.update_time= 0; if (flag & HA_STATUS_AUTO) stats.auto_increment_value= 1; if (tdbp && pure) CloseTable(g); // Not used anymore DBUG_RETURN(0); } // end of info /** @brief extra() is called whenever the server wishes to send a hint to the storage engine. The myisam engine implements the most hints. ha_innodb.cc has the most exhaustive list of these hints. @note This is not yet implemented for CONNECT. @see ha_innodb.cc */ int ha_connect::extra(enum ha_extra_function operation) { DBUG_ENTER("ha_connect::extra"); DBUG_RETURN(0); } // end of extra /** @brief Used to delete all rows in a table, including cases of truncate and cases where the optimizer realizes that all rows will be removed as a result of an SQL statement. @details Called from item_sum.cc by Item_func_group_concat::clear(), Item_sum_count_distinct::clear(), and Item_func_group_concat::clear(). Called from sql_delete.cc by mysql_delete(). Called from sql_select.cc by JOIN::reinit(). Called from sql_union.cc by st_select_lex_unit::exec(). @see Item_func_group_concat::clear(), Item_sum_count_distinct::clear() and Item_func_group_concat::clear() in item_sum.cc; mysql_delete() in sql_delete.cc; JOIN::reinit() in sql_select.cc and st_select_lex_unit::exec() in sql_union.cc. */ int ha_connect::delete_all_rows() { int rc= 0; PGLOBAL g= xp->g; DBUG_ENTER("ha_connect::delete_all_rows"); // Close and reopen the table so it will be deleted rc= CloseTable(g); if (!(OpenTable(g))) { if (CntDeleteRow(g, tdbp, true)) { printf("%s\n", g->Message); rc= HA_ERR_INTERNAL_ERROR; } // endif } else rc= HA_ERR_INITIALIZATION; DBUG_RETURN(rc); } // end of delete_all_rows /** @brief This create a lock on the table. If you are implementing a storage engine that can handle transacations look at ha_berkely.cc to see how you will want to go about doing this. Otherwise you should consider calling flock() here. Hint: Read the section "locking functions for mysql" in lock.cc to understand this. @details Called from lock.cc by lock_external() and unlock_external(). Also called from sql_table.cc by copy_data_between_tables(). @note Following what we did in the MySQL XDB handler, we use this call to actually physically open the table. This could be reconsider when finalizing this handler design, which means we have a better understanding of what MariaDB does. @see lock.cc by lock_external() and unlock_external() in lock.cc; the section "locking functions for mysql" in lock.cc; copy_data_between_tables() in sql_table.cc. */ int ha_connect::external_lock(THD *thd, int lock_type) { int rc= 0; bool del= false; MODE newmode; PGLOBAL g= GetPlug(thd); DBUG_ENTER("ha_connect::external_lock"); if (xtrace) printf("%p external_lock: lock_type=%d\n", this, lock_type); if (!g) DBUG_RETURN(-99); // Action will depend on lock_type switch (lock_type) { case F_WRLCK: newmode= MODE_WRITE; break; case F_RDLCK: newmode= MODE_READ; break; case F_UNLCK: default: newmode= MODE_ANY; } // endswitch mode if (newmode == MODE_ANY) { // This is unlocking, do it by closing the table if (xp->CheckQueryID()) rc= 2; // Logical error ??? else if (tdbp) { if (tdbp->GetMode() == MODE_ANY && *tdbp->GetName() == '#' && xp->tabp) { PDOSDEF defp1= (PDOSDEF)((PTDBASE)tdbp)->GetDef(); PDOSDEF defp2= (PDOSDEF)xp->tabp->GetDef(); PIXDEF xp1, xp2, sxp; // Look for new created indexes for (xp1= defp1->GetIndx(); xp1; xp1= xp1->GetNext()) { for (xp2= defp2->GetIndx(); xp2; xp2= xp2->GetNext()) if (!stricmp(xp1->GetName(), xp2->GetName())) break; // Index already made if (!xp2) { // Here we do make the index on tabp sxp= xp1->GetNext(); xp1->SetNext(NULL); xp->tabp->MakeIndex(g, xp1, true); xp1->SetNext(sxp); } // endif xp2 } // endfor xp1 // Look for dropped indexes for (xp2= defp2->GetIndx(); xp2; xp2= xp2->GetNext()) { for (xp1= defp1->GetIndx(); xp1; xp1= xp1->GetNext()) if (!stricmp(xp1->GetName(), xp2->GetName())) break; // Index not to drop if (!xp1) { // Here we erase the index file sxp= xp2->GetNext(); xp2->SetNext(NULL); defp2->DeleteIndexFile(g, xp2); xp2->SetNext(sxp); } // endif xp1 } // endfor xp2 } // endif Mode rc= CloseTable(g); } // endif tdbp DBUG_RETURN(rc); } // endif MODE_ANY if (xtrace) { printf("%p external_lock: cmdtype=%d\n", this, thd->lex->sql_command); printf("Cmd=%s\n", thd->query_string); } // endif xtrace // Next code is temporarily replaced until sql_command is set stop= false; if (newmode == MODE_WRITE) { switch (thd->lex->sql_command) { case SQLCOM_INSERT: case SQLCOM_CREATE_TABLE: case SQLCOM_LOAD: case SQLCOM_INSERT_SELECT: newmode= MODE_INSERT; break; // case SQLCOM_REPLACE: // case SQLCOM_REPLACE_SELECT: // newmode= MODE_UPDATE; // To be checked // break; case SQLCOM_DELETE: case SQLCOM_DELETE_MULTI: del= true; case SQLCOM_TRUNCATE: newmode= MODE_DELETE; break; case SQLCOM_UPDATE: case SQLCOM_UPDATE_MULTI: newmode= MODE_UPDATE; break; case SQLCOM_SELECT: case SQLCOM_OPTIMIZE: newmode= MODE_READ; break; case SQLCOM_DROP_TABLE: case SQLCOM_RENAME_TABLE: case SQLCOM_ALTER_TABLE: newmode= MODE_ANY; break; case SQLCOM_DROP_INDEX: case SQLCOM_CREATE_INDEX: newmode= MODE_ANY; stop= true; break; default: printf("Unsupported sql_command=%d", thd->lex->sql_command); sprintf(g->Message, "Unsupported sql_command=%d", thd->lex->sql_command); DBUG_RETURN(HA_ERR_INTERNAL_ERROR); } // endswitch newmode } else if (newmode == MODE_READ) { switch (thd->lex->sql_command) { case SQLCOM_INSERT: case SQLCOM_CREATE_TABLE: case SQLCOM_LOAD: case SQLCOM_INSERT_SELECT: // case SQLCOM_REPLACE: // case SQLCOM_REPLACE_SELECT: case SQLCOM_DELETE: case SQLCOM_DELETE_MULTI: case SQLCOM_TRUNCATE: case SQLCOM_UPDATE: case SQLCOM_UPDATE_MULTI: case SQLCOM_SELECT: case SQLCOM_OPTIMIZE: break; case SQLCOM_DROP_INDEX: case SQLCOM_CREATE_INDEX: stop= true; case SQLCOM_DROP_TABLE: case SQLCOM_RENAME_TABLE: case SQLCOM_ALTER_TABLE: newmode= MODE_ANY; break; default: printf("Unsupported sql_command=%d", thd->lex->sql_command); sprintf(g->Message, "Unsupported sql_command=%d", thd->lex->sql_command); DBUG_RETURN(HA_ERR_INTERNAL_ERROR); } // endswitch newmode } // endif's newmode if (xtrace) printf("New mode=%d\n", newmode); // If this is the start of a new query, cleanup the previous one if (xp->CheckCleanup()) { tdbp= NULL; valid_info= false; } // endif CheckCleanup if (xtrace) printf("Calling CntCheckDB db=%s\n", GetDBName(NULL)); // Set or reset the good database environment if (CntCheckDB(g, this, GetDBName(NULL))) { printf("%p external_lock: %s\n", this, g->Message); rc= HA_ERR_INTERNAL_ERROR; // This can NOT be called without open called first, but // the table can have been closed since then } else if (!tdbp || xp->CheckQuery(valid_query_id) || xmod != newmode) { if (tdbp) CloseTable(g); xmod= newmode; if (!table) rc= 3; // Logical error // Delay open until used fields are known } // endif tdbp if (xtrace) printf("external_lock: rc=%d\n", rc); DBUG_RETURN(rc); } // end of external_lock /** @brief The idea with handler::store_lock() is: The statement decides which locks should be needed for the table. For updates/deletes/inserts we get WRITE locks, for SELECT... we get read locks. @details Before adding the lock into the table lock handler (see thr_lock.c), mysqld calls store lock with the requested locks. Store lock can now modify a write lock to a read lock (or some other lock), ignore the lock (if we don't want to use MySQL table locks at all), or add locks for many tables (like we do when we are using a MERGE handler). Berkeley DB, for example, changes all WRITE locks to TL_WRITE_ALLOW_WRITE (which signals that we are doing WRITES, but are still allowing other readers and writers). When releasing locks, store_lock() is also called. In this case one usually doesn't have to do anything. In some exceptional cases MySQL may send a request for a TL_IGNORE; This means that we are requesting the same lock as last time and this should also be ignored. (This may happen when someone does a flush table when we have opened a part of the tables, in which case mysqld closes and reopens the tables and tries to get the same locks at last time). In the future we will probably try to remove this. Called from lock.cc by get_lock_data(). @note In this method one should NEVER rely on table->in_use, it may, in fact, refer to a different thread! (this happens if get_lock_data() is called from mysql_lock_abort_for_thread() function) @see get_lock_data() in lock.cc */ THR_LOCK_DATA **ha_connect::store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type) { if (lock_type != TL_IGNORE && lock.type == TL_UNLOCK) lock.type=lock_type; *to++ = &lock; return to; } /** @brief Used to delete a table. By the time delete_table() has been called all opened references to this table will have been closed (and your globally shared references released). The variable name will just be the name of the table. You will need to remove any files you have created at this point. @details If you do not implement this, the default delete_table() is called from handler.cc and it will delete all files with the file extensions returned by bas_ext(). Called from handler.cc by delete_table and ha_create_table(). Only used during create if the table_flag HA_DROP_BEFORE_CREATE was specified for the storage engine. @see delete_table and ha_create_table() in handler.cc */ int ha_connect::delete_table(const char *name) { DBUG_ENTER("ha_connect::delete_table"); /* This is not implemented but we want someone to be able that it works. */ DBUG_RETURN(0); } /** @brief Given a starting key and an ending key, estimate the number of rows that will exist between the two keys. @details end_key may be empty, in which case determine if start_key matches any rows. Called from opt_range.cc by check_quick_keys(). @see check_quick_keys() in opt_range.cc */ ha_rows ha_connect::records_in_range(uint inx, key_range *min_key, key_range *max_key) { ha_rows rows; DBUG_ENTER("ha_connect::records_in_range"); if (indexing < 0 || inx != active_index) index_init(inx, false); if (xtrace) printf("records_in_range: inx=%d indexing=%d\n", inx, indexing); if (indexing > 0) { int nval; uint len[2]; const uchar *key[2]; bool incl[2]; key_part_map kmap[2]; key[0]= (min_key) ? min_key->key : NULL; key[1]= (max_key) ? max_key->key : NULL; len[0]= (min_key) ? min_key->length : 0; len[1]= (max_key) ? max_key->length : 0; incl[0]= (min_key) ? (min_key->flag == HA_READ_KEY_EXACT) : false; incl[1]= (max_key) ? (max_key->flag == HA_READ_AFTER_KEY) : false; kmap[0]= (min_key) ? min_key->keypart_map : 0; kmap[1]= (max_key) ? max_key->keypart_map : 0; if ((nval= CntIndexRange(xp->g, tdbp, key, len, incl, kmap)) < 0) rows= HA_POS_ERROR; else rows= (ha_rows)nval; } else if (indexing < 0) rows= HA_POS_ERROR; else rows= 100000000; // Don't use missing index DBUG_RETURN(rows); } // end of records_in_range /** Convert an ISO-8859-1 column name to UTF-8 */ char *ha_connect::encode(PGLOBAL g, char *cnm) { char *buf= (char*)PlugSubAlloc(g, NULL, strlen(cnm) * 3); uint dummy_errors; uint32 len= copy_and_convert(buf, strlen(cnm) * 3, &my_charset_utf8_general_ci, cnm, strlen(cnm), &my_charset_latin1, &dummy_errors); buf[len]= '\0'; return buf; } // end of Encode /** Store field definition for create. @return Return 0 if ok */ bool ha_connect::add_fields(THD *thd, void *alt_info, LEX_STRING *field_name, enum_field_types type, char *length, char *decimals, uint type_modifier, // Item *default_value, Item *on_update_value, LEX_STRING *comment, // char *change, // List<String> *interval_list, CHARSET_INFO *cs, // uint uint_geom_type, void *vcolinfo, engine_option_value *create_options) { register Create_field *new_field; LEX *lex= thd->lex; Alter_info *alter_info= (Alter_info*)alt_info; Virtual_column_info *vcol_info= (Virtual_column_info *)vcolinfo; DBUG_ENTER("ha_connect::add_fields"); if (check_string_char_length(field_name, "", NAME_CHAR_LEN, system_charset_info, 1)) { my_error(ER_TOO_LONG_IDENT, MYF(0), field_name->str); /* purecov: inspected */ DBUG_RETURN(1); /* purecov: inspected */ } #if 0 if (type_modifier & PRI_KEY_FLAG) { Key *key; lex->col_list.push_back(new Key_part_spec(*field_name, 0)); key= new Key(Key::PRIMARY, null_lex_str, &default_key_create_info, 0, lex->col_list, NULL); alter_info->key_list.push_back(key); lex->col_list.empty(); } if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG)) { Key *key; lex->col_list.push_back(new Key_part_spec(*field_name, 0)); key= new Key(Key::UNIQUE, null_lex_str, &default_key_create_info, 0, lex->col_list, NULL); alter_info->key_list.push_back(key); lex->col_list.empty(); } if (default_value) { /* Default value should be literal => basic constants => no need fix_fields() We allow only one function as part of default value - NOW() as default for TIMESTAMP type. */ if (default_value->type() == Item::FUNC_ITEM && !(((Item_func*)default_value)->functype() == Item_func::NOW_FUNC && type == MYSQL_TYPE_TIMESTAMP)) { my_error(ER_INVALID_DEFAULT, MYF(0), field_name->str); DBUG_RETURN(1); } else if (default_value->type() == Item::NULL_ITEM) { default_value= 0; if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) == NOT_NULL_FLAG) { my_error(ER_INVALID_DEFAULT, MYF(0), field_name->str); DBUG_RETURN(1); } } else if (type_modifier & AUTO_INCREMENT_FLAG) { my_error(ER_INVALID_DEFAULT, MYF(0), field_name->str); DBUG_RETURN(1); } } if (on_update_value && type != MYSQL_TYPE_TIMESTAMP) { my_error(ER_INVALID_ON_UPDATE, MYF(0), field_name->str); DBUG_RETURN(1); } #endif // 0 if (!(new_field= new Create_field()) || new_field->init(thd, field_name->str, type, length, decimals, type_modifier, NULL, NULL, comment, NULL, NULL, cs, 0, vcol_info, create_options)) DBUG_RETURN(1); alter_info->create_list.push_back(new_field); //lex->last_field=new_field; DBUG_RETURN(0); } /** @brief pre_create() is called when creating a table with no columns. @details When pre_create() is called the .frm file have not already been created. You can overwrite some definitions at this point but the main purpose of it is to define the columns for some table types. @note Not really implemented yet. */ bool ha_connect::pre_create(THD *thd, void *crt_info, void *alt_info) { char ttp= '?', spc= ',', qch= 0, *typn= "DOS"; char *fn, *dsn, *tab, *db, *host, *user, *pwd, *prt, *sep, *inf; #if defined(WIN32) char *nsp= NULL, *cls= NULL; #endif // WIN32 int port= MYSQL_PORT, hdr= 0, mxr= 0; bool b= false, ok= false, info= false; LEX *lex= thd->lex; LEX_STRING *comment, *name; HA_CREATE_INFO *create_info= (HA_CREATE_INFO *)crt_info; engine_option_value *pov; PQRYRES qrp; PCOLRES crp; PGLOBAL g= GetPlug(thd); fn= dsn= tab= db= host= user= pwd= prt= sep= inf= NULL; if (g) { // Set default values tab= (char*)create_info->alias; db= thd->db; } else return true; // Get the useful create options for (pov= create_info->option_list; pov; pov= pov->next) if (!stricmp(pov->name.str, "table_type")) { typn= pov->value.str; ttp= GetTypeID(typn); } else if (!stricmp(pov->name.str, "file_name")) { fn= pov->value.str; } else if (!stricmp(pov->name.str, "tabname")) { tab= pov->value.str; } else if (!stricmp(pov->name.str, "db_name")) { db= pov->value.str; } else if (!stricmp(pov->name.str, "info")) { inf= pov->value.str; } else if (!stricmp(pov->name.str, "sep_char")) { sep= pov->value.str; spc= (!strcmp(sep, "\\t")) ? '\t' : *sep; } else if (!stricmp(pov->name.str, "qchar")) { qch= *pov->value.str; } else if (!stricmp(pov->name.str, "quoted")) { if (!qch) qch= '"'; } else if (!stricmp(pov->name.str, "header")) { hdr= atoi(pov->value.str); } else if (!stricmp(pov->name.str, "option_list")) { host= GetListOption("host", pov->value.str, "localhost"); user= GetListOption("user", pov->value.str, "root"); pwd= GetListOption("password", pov->value.str); prt= GetListOption("port", pov->value.str); port= (prt) ? atoi(prt) : MYSQL_PORT; #if defined(WIN32) nsp= GetListOption("namespace", pov->value.str); cls= GetListOption("class", pov->value.str); #endif // WIN32 mxr= atoi(GetListOption("maxerr", pov->value.str, "0")); inf= GetListOption("info", pov->value.str); } // endelse option_list switch (ttp) { #if defined(ODBC_SUPPORT) case 'O': // ODBC info= inf && !!strchr("1yYoO", *inf); if (!(dsn= create_info->connect_string.str) && !info) sprintf(g->Message, "Missing %s connection string", typn); else ok= true; break; #endif // ODBC_SUPPORT case 'A': // DBF case 'C': // CSV if (!fn) sprintf(g->Message, "Missing %s file name", typn); else ok= true; break; #if defined(MYSQL_SUPPORT) case 'Y': // MYSQL if (!user) user= "root"; // Avoid crash ok= true; break; #endif // MYSQL_SUPPORT #if defined(WIN32) case 'W': // WMI ok= true; break; #endif // WIN32 default: sprintf(g->Message, "Cannot get column info for table type %s", typn); } // endif ttp if (ok) { char *length, *decimals, *cnm, *rem; int i, len, dec; enum_field_types type; PDBUSER dup= PlgGetUser(g); PCATLG cat= (dup) ? dup->Catalog : NULL; if (cat) cat->SetDataPath(g, thd->db); else return true; // Should never happen switch (ttp) { case 'A': qrp= DBFColumns(g, fn, false); break; #if defined(ODBC_SUPPORT) case 'O': if (dsn) qrp= MyODBCCols(g, tab, dsn, info); else qrp= ODBCDataSources(g); break; #endif // ODBC_SUPPORT #if defined(MYSQL_SUPPORT) case 'Y': qrp= MyColumns(g, host, db, user, pwd, tab, NULL, port, false); break; #endif // MYSQL_SUPPORT case 'C': qrp= CSVColumns(g, fn, spc, qch, hdr, mxr); break; #if defined(WIN32) case 'W': qrp= WMIColumns(g, nsp, cls); break; #endif // WIN32 } // endswitch ttp if (!qrp) { push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 0, g->Message); return true; } // endif qrp if (info) { for (crp=qrp->Colresp; !b && crp; crp= crp->Next) { cnm= encode(g, crp->Name); name= thd->make_lex_string(NULL, cnm, strlen(cnm), true); type= PLGtoMYSQL(crp->Type, true); len= crp->Length; length= (char*)PlugSubAlloc(g, NULL, 8); sprintf(length, "%d", len); decimals= NULL; comment= thd->make_lex_string(NULL, "", 0, true); // Now add the field b= add_fields(thd, alt_info, name, type, length, decimals, 0, comment, NULL, NULL, NULL); } // endfor crp } else for (i= 0; !b && i < qrp->Nblin; i++) { crp= qrp->Colresp; // Column Name cnm= encode(g, crp->Kdata->GetCharValue(i)); name= thd->make_lex_string(NULL, cnm, strlen(cnm), true); crp= crp->Next; // Data Type type= PLGtoMYSQL(crp->Kdata->GetIntValue(i), true); crp= crp->Next; // Type Name crp= crp->Next; // Precision (length) len= crp->Kdata->GetIntValue(i); length= (char*)PlugSubAlloc(g, NULL, 8); sprintf(length, "%d", len); crp= crp->Next; // Length crp= crp->Next; // Scale (precision) if ((dec= crp->Kdata->GetIntValue(i))) { decimals= (char*)PlugSubAlloc(g, NULL, 8); sprintf(decimals, "%d", dec); } else decimals= NULL; if ((crp= crp->Next) && // Remark (comment) (rem= crp->Kdata->GetCharValue(i))) comment= thd->make_lex_string(NULL, rem, strlen(rem), true); else comment= thd->make_lex_string(NULL, "", 0, true); // Now add the field b= add_fields(thd, alt_info, name, type, length, decimals, 0, comment, NULL, NULL, NULL); } // endfor i return b; } // endif ok push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 0, g->Message); return true; } // end of pre_create /** @brief create() is called to create a database. The variable name will have the name of the table. @details When create() is called you do not need to worry about opening the table. Also, the .frm file will have already been created so adjusting create_info is not necessary. You can overwrite the .frm file at this point if you wish to change the table definition, but there are no methods currently provided for doing so. Called from handle.cc by ha_create_table(). @note Currently we do nothing here because we suppose that the PlugDB matching table already exists. At least we should check that the table definition for MariaDB exactly match the PlugDB one. Later we should make possible to entirely create a table from MariaDB. @see ha_create_table() in handle.cc */ int ha_connect::create(const char *name, TABLE *table_arg, HA_CREATE_INFO *create_info) { int rc= RC_OK; bool dbf; Field* *field; Field *fp; TABLE *st= table; // Probably unuseful PIXDEF xdp, pxd= NULL, toidx= NULL; PGLOBAL g= GetPlug(table_arg->in_use); DBUG_ENTER("ha_connect::create"); PTOS options= GetTableOptionStruct(table_arg); // CONNECT engine specific table options: DBUG_ASSERT(options); if (!g) { rc= HA_ERR_INTERNAL_ERROR; DBUG_RETURN(rc); } // endif g // Check column types dbf= (options->type && !stricmp(options->type, "DBF")); for (field= table_arg->field; *field; field++) { fp= *field; #if defined(MARIADB) if (fp->vcol_info && !fp->stored_in_db) continue; // This is a virtual column #endif // MARIADB switch (fp->type()) { case MYSQL_TYPE_SHORT: case MYSQL_TYPE_LONG: case MYSQL_TYPE_FLOAT: case MYSQL_TYPE_DOUBLE: case MYSQL_TYPE_TIMESTAMP: case MYSQL_TYPE_DATE: case MYSQL_TYPE_TIME: case MYSQL_TYPE_DATETIME: case MYSQL_TYPE_YEAR: case MYSQL_TYPE_NEWDATE: case MYSQL_TYPE_VARCHAR: case MYSQL_TYPE_LONGLONG: break; // Ok case MYSQL_TYPE_VAR_STRING: case MYSQL_TYPE_STRING: case MYSQL_TYPE_DECIMAL: case MYSQL_TYPE_NEWDECIMAL: case MYSQL_TYPE_INT24: break; // To be checked case MYSQL_TYPE_TINY: case MYSQL_TYPE_BIT: case MYSQL_TYPE_NULL: case MYSQL_TYPE_ENUM: case MYSQL_TYPE_SET: case MYSQL_TYPE_TINY_BLOB: case MYSQL_TYPE_MEDIUM_BLOB: case MYSQL_TYPE_LONG_BLOB: case MYSQL_TYPE_BLOB: case MYSQL_TYPE_GEOMETRY: default: // fprintf(stderr, "Unsupported type column %s\n", fp->field_name); sprintf(g->Message, "Unsupported type for column %s", fp->field_name); rc= HA_ERR_INTERNAL_ERROR; my_printf_error(ER_UNKNOWN_ERROR, "Unsupported type for column '%s'", MYF(0), fp->field_name); DBUG_RETURN(rc); } // endswitch type if (dbf) { bool b= false; if ((b= strlen(fp->field_name) > 11)) sprintf(g->Message, "DBF: Column name '%s' is too long (max=11)", fp->field_name); else if ((b= fp->field_length > 255)) sprintf(g->Message, "DBF: Column length too big for '%s' (max=255)", fp->field_name); if (b) { my_message(ER_UNKNOWN_ERROR, g->Message, MYF(0)); rc= HA_ERR_INTERNAL_ERROR; DBUG_RETURN(rc); } // endif b } // endif dbf } // endfor field // Check whether indexes were specified table= table_arg; // Used by called functions // Get the index definitions for (int n= 0; (unsigned)n < table->s->keynames.count; n++) { if (xtrace) printf("Getting created index %d info\n", n + 1); xdp= GetIndexInfo(n); if (pxd) pxd->SetNext(xdp); else toidx= xdp; pxd= xdp; } // endfor n if (toidx) { PDBUSER dup= PlgGetUser(g); PCATLG cat= (dup) ? dup->Catalog : NULL; DBUG_ASSERT(cat); if (cat) cat->SetDataPath(g, table_arg->in_use->db); if ((rc= optimize(NULL, NULL))) { printf("Create rc=%d %s\n", rc, g->Message); rc= HA_ERR_INTERNAL_ERROR; } else CloseTable(g); } // endif toidx table= st; DBUG_RETURN(rc); } // end of create /** check_if_incompatible_data() called if ALTER TABLE can't detect otherwise if new and old definition are compatible @details If there are no other explicit signs like changed number of fields this function will be called by compare_tables() (sql/sql_tables.cc) to decide should we rewrite whole table or only .frm file. */ bool ha_connect::check_if_incompatible_data(HA_CREATE_INFO *info, uint table_changes) { //ha_table_option_struct *param_old, *param_new; DBUG_ENTER("ha_connect::check_if_incompatible_data"); // TO DO: implement it. DBUG_RETURN(COMPATIBLE_DATA_YES); } struct st_mysql_storage_engine connect_storage_engine= { MYSQL_HANDLERTON_INTERFACE_VERSION }; struct st_mysql_daemon unusable_connect= { MYSQL_DAEMON_INTERFACE_VERSION }; mysql_declare_plugin(connect) { MYSQL_STORAGE_ENGINE_PLUGIN, &connect_storage_engine, "CONNECT", "Olivier Bertrand", "Direct access to external data, including many file formats", PLUGIN_LICENSE_GPL, connect_init_func, /* Plugin Init */ connect_done_func, /* Plugin Deinit */ 0x0001 /* 0.1 */, NULL, /* status variables */ NULL, /* system variables */ NULL, /* config options */ 0, /* flags */ } mysql_declare_plugin_end; #if defined(MARIADB) maria_declare_plugin(connect) { MYSQL_STORAGE_ENGINE_PLUGIN, &connect_storage_engine, "CONNECT", "Olivier Bertrand", "Direct access to external data, including many file formats", PLUGIN_LICENSE_GPL, connect_init_func, /* Plugin Init */ connect_done_func, /* Plugin Deinit */ 0x0001, /* version number (0.1) */ NULL, /* status variables */ NULL, /* system variables */ "0.1", /* string version */ MariaDB_PLUGIN_MATURITY_EXPERIMENTAL /* maturity */ }, { MYSQL_DAEMON_PLUGIN, &unusable_connect, "UNUSABLE", "Olivier Bertrand", "Unusable Daemon", PLUGIN_LICENSE_PROPRIETARY, NULL, /* Plugin Init */ NULL, /* Plugin Deinit */ 0x0101, /* version number (1.1) */ NULL, /* status variables */ NULL, /* system variables */ "1.01.00.000" , /* version, as a string */ MariaDB_PLUGIN_MATURITY_EXPERIMENTAL /* maturity */ } maria_declare_plugin_end; #endif // MARIADB #if defined(WIN32) /**************************************************************************/ /* DllMain */ /**************************************************************************/ bool APIENTRY DllMain(HINSTANCE hInst, ULONG ulReason, PCONTEXT pctx) { switch (ulReason) { case DLL_PROCESS_ATTACH: printf("CONNECT Engine loaded...\n"); GetCurrentDirectory(sizeof(connectini), connectini); strcat(connectini, "\\connect.ini"); if ((xtrace= GetPrivateProfileInt("CONNECT", "Trace", 0, connectini))) { printf("connectini=%s xtrace=%d\n", connectini, xtrace); printf("plgini=%s\n", plgini); printf("plgxini=%s\n", plgxini); printf("nmfile=%s\n", nmfile); printf("pdebug=%s\n", pdebug); printf("version=%s\n", version); trace= xtrace; } // endif xtrace #ifdef LIBXML2_SUPPORT XmlInitParserLib(); #endif // LIBXML2_SUPPORT break; case DLL_PROCESS_DETACH: #ifdef LIBXML2_SUPPORT XmlCleanupParserLib(); #endif // LIBXML2_SUPPORT break; case DLL_THREAD_ATTACH: break; case DLL_THREAD_DETACH: break; default: break; } // endswitch ulReason return true; } // end of DllMain #else // !WIN32 /**************************************************************************/ /* Library's initialization function. */ /**************************************************************************/ void __attribute__((constructor)) init() { printf("CONNECT Engine loaded...\n"); getcwd(connectini, sizeof(connectini)); strcat(connectini, "/connect.ini"); printf("connectini=%s\n", connectini); if ((xtrace= GetPrivateProfileInt("CONNECT", "Trace", 0, connectini))) { printf("connectini=%s xtrace=%d\n", connectini, xtrace); printf("plgini=%s\n", plgini); printf("plgxini=%s\n", plgxini); printf("nmfile=%s\n", nmfile); printf("pdebug=%s\n", pdebug); printf("version=%s\n", version); trace= xtrace; } // endif xtrace #ifdef LIBXML2_SUPPORT XmlInitParserLib(); #endif // LIBXML2_SUPPORT } // end of init /**************************************************************************/ /* Library's cleanup function */ /**************************************************************************/ void __attribute__((destructor)) fini() { #ifdef LIBXML2_SUPPORT XmlCleanupParserLib(); #endif // LIBXML2_SUPPORT } // end of fini #endif // !WIN32