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Commit 3ef0b19c authored by bell@sanja.is.com.ua's avatar bell@sanja.is.com.ua
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fixed & added comments (according to Igor's review and a bit more)

parent a9b759af
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Showing with 150 additions and 107 deletions
sql/item_strfunc.h
View file @ 3ef0b19c
......@@ -261,7 +261,7 @@ class Item_func_rtrim :public Item_func_trim
Returns strcat('*', octet2hex(sha1(sha1(password)))). '*' stands for new
password format, sha1(sha1(password) is so-called hash_stage2 value.
Length of returned string is always 41 byte. To find out how entire
authentification procedure works, see comments in password.c.
authentication procedure works, see comments in password.c.
*/
class Item_func_password :public Item_str_func
......
sql/parse_file.cc
View file @ 3ef0b19c
......@@ -57,11 +57,11 @@ write_escaped_string(IO_CACHE *file, LEX_STRING *val_s)
if (my_b_append(file, (const byte *)"\\n", 2))
return TRUE;
break;
case '\0': // problem for some string processing utilites
case '\0': // problem for some string processing utilities
if (my_b_append(file, (const byte *)"\\0", 2))
return TRUE;
break;
case 26: // problem for windows utilites (Ctrl-Z)
case 26: // problem for windows utilities (Ctrl-Z)
if (my_b_append(file, (const byte *)"\\z", 2))
return TRUE;
break;
......@@ -253,7 +253,7 @@ sql_create_definition_file(const LEX_STRING *dir, const LEX_STRING *file_name,
{
if (old_version != ULONGLONG_MAX && max_versions != 0)
{
// save buckup
// save backup
char path_arc[FN_REFLEN];
// backup old version
char path_to[FN_REFLEN];
......@@ -383,9 +383,9 @@ sql_parse_prepare(const LEX_STRING *file_name, MEM_ROOT *mem_root,
}
end= parser->end= parser->buff + len;
*end= '\0'; // barriaer for more simple parsing
*end= '\0'; // barrier for more simple parsing
// 7 = 5 (TYPE=) + 1 (leter at least of type name) + 1 ('\n')
// 7 = 5 (TYPE=) + 1 (letter at least of type name) + 1 ('\n')
if (len < 7 ||
parser->buff[0] != 'T' ||
parser->buff[1] != 'Y' ||
......
sql/parse_file.h
View file @ 3ef0b19c
......@@ -23,7 +23,7 @@
enum file_opt_type {
FILE_OPTIONS_STRING, /* String (LEX_STRING) */
FILE_OPTIONS_ESTRING, /* Escaped string (LEX_STRING) */
FILE_OPTIONS_ULONGLONG, /* ulonglong parapeter (ulonglong) */
FILE_OPTIONS_ULONGLONG, /* ulonglong parameter (ulonglong) */
FILE_OPTIONS_REV, /* Revision version number (ulonglong) */
FILE_OPTIONS_TIMESTAMP, /* timestamp (LEX_STRING have to be
allocated with length 20 (19+1) */
......
sql/password.c
View file @ 3ef0b19c
......@@ -65,7 +65,7 @@
#include <sha1.h>
#include "mysql.h"
/************ MySQL 3.23-4.0 authentification routines: untouched ***********/
/************ MySQL 3.23-4.0 authentication routines: untouched ***********/
/*
New (MySQL 3.21+) random generation structure initialization
......@@ -280,7 +280,7 @@ void make_password_from_salt_323(char *to, const ulong *salt)
/*
**************** MySQL 4.1.1 authentification routines *************
**************** MySQL 4.1.1 authentication routines *************
*/
/*
......
sql/sql_acl.cc
View file @ 3ef0b19c
......@@ -17,8 +17,8 @@
/*
The privileges are saved in the following tables:
mysql/user ; super user who are allowed to do almoust anything
mysql/host ; host priviliges. This is used if host is empty in mysql/db.
mysql/user ; super user who are allowed to do almost anything
mysql/host ; host privileges. This is used if host is empty in mysql/db.
mysql/db ; database privileges / user
data in tables is sorted according to how many not-wild-cards there is
......@@ -597,7 +597,7 @@ static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b)
thd->host, thd->ip, thd->user are used for checks.
mqh user resources; on success mqh is reset, else
unchanged
passwd scrambled & crypted password, recieved from client
passwd scrambled & crypted password, received from client
(to check): thd->scramble or thd->scramble_323 is
used to decrypt passwd, so they must contain
original random string,
......@@ -608,7 +608,7 @@ static int acl_compare(ACL_ACCESS *a,ACL_ACCESS *b)
RETURN VALUE
0 success: thd->priv_user, thd->priv_host, thd->master_access, mqh are
updated
1 user not found or authentification failure
1 user not found or authentication failure
2 user found, has long (4.1.1) salt, but passwd is in old (3.23) format.
-1 user found, has short (3.23) salt, but passwd is in new (4.1.1) format.
*/
......@@ -748,7 +748,7 @@ int acl_getroot(THD *thd, USER_RESOURCES *mqh,
break;
}
DBUG_PRINT("info",("checkpoint 2"));
/* If X509 issuer is speified, we check it... */
/* If X509 issuer is specified, we check it... */
if (acl_user->x509_issuer)
{
DBUG_PRINT("info",("checkpoint 3"));
......@@ -810,7 +810,7 @@ int acl_getroot(THD *thd, USER_RESOURCES *mqh,
/*
* This is like acl_getroot() above, but it doesn't check password,
* and we don't care about the user resources.
* Used to get access rights for SQL SECURITY DEFINER invokation of
* Used to get access rights for SQL SECURITY DEFINER invocation of
* stored procedures.
*/
int acl_getroot_no_password(THD *thd)
......@@ -1831,7 +1831,7 @@ GRANT_TABLE::GRANT_TABLE(const char *h, const char *d,const char *u,
{
/* Host given by user */
orig_host= strdup_root(&memex,h);
/* Convert empty hostname to '%' for easy comparision */
/* Convert empty hostname to '%' for easy comparison */
host= orig_host[0] ? orig_host : (char*) "%";
db = strdup_root(&memex,d);
user = strdup_root(&memex,u);
......@@ -2778,7 +2778,7 @@ void grant_reload(THD *thd)
/****************************************************************************
Check table level grants
SYNPOSIS
SYNOPSIS
bool check_grant()
thd Thread handler
want_access Bits of privileges user needs to have
......@@ -2792,7 +2792,7 @@ void grant_reload(THD *thd)
RETURN
0 ok
1 Error: User did not have the requested privielges
1 Error: User did not have the requested privileges
****************************************************************************/
bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
......@@ -3870,8 +3870,8 @@ int wild_case_compare(CHARSET_INFO *cs, const char *str,const char *wildstr)
fill effective privileges for table
SYNOPSIS
get_effectlige_privileges()
thd thread handleg
fill_effective_table_privileges()
thd thread handler
grant grants table descriptor
db db name
table table name
......
sql/sql_lex.cc
View file @ 3ef0b19c
......@@ -1537,11 +1537,17 @@ void st_select_lex::print_limit(THD *thd, String *str)
/*
Check is merging algorithm can be used on this VIEW
Check whether the merging algorithm can be used on this VIEW
SYNOPSIS
st_lex::can_be_merged()
DESCRIPTION
We can apply merge algorithm if it is single SELECT view (we do not
count SELECTs of underlying views) and we have not grpouping, ordering,
HAVING clause, aggregate functions, DISTINCT clause, LIMIT clause and
several underlying tables.
RETURN
FALSE - only temporary table algorithm can be used
TRUE - merge algorithm can be used
......@@ -1569,12 +1575,18 @@ bool st_lex::can_be_merged()
select_lex.select_limit == HA_POS_ERROR);
}
/*
check if command can use VIEW with MERGE algorithm (for top VIEWs)
SYNOPSIS
st_lex::can_use_merged()
DESCRIPTION
Only listed here commands can use merge algorithm in top level
SELECT_LEX (for subqueries will be used merge algorithm if
st_lex::can_not_use_merged() is not TRUE).
RETURN
FALSE - command can't use merged VIEWs
TRUE - VIEWs with MERGE algorithms can be used
......@@ -1601,11 +1613,15 @@ bool st_lex::can_use_merged()
}
/*
check if command can't use merged views in any part of command
Check if command can't use merged views in any part of command
SYNOPSIS
st_lex::can_not_use_merged()
DESCRIPTION
Temporary table algorithm will be used on all SELECT levels for queries
listed here (see also st_lex::can_use_merged()).
RETURN
FALSE - command can't use merged VIEWs
TRUE - VIEWs with MERGE algorithms can be used
......@@ -1673,16 +1689,16 @@ void st_select_lex_unit::set_limit(SELECT_LEX *values,
/*
Unlink first table from global table list and first table from outer select
list (lex->select_lex)
Unlink the first table from the global table list and the first table from
outer select (lex->select_lex) local list
SYNOPSIS
unlink_first_table()
link_to_local Set to 1 if caller should link this table to local
link_to_local Set to 1 if caller should link this table to local list
NOTES
We rely on fact that first table in both list are same or local list
is empty
We assume that first tables in both lists is the same table or the local
list is empty.
RETURN
0 If 'query_tables' == 0
......@@ -1711,8 +1727,8 @@ TABLE_LIST *st_lex::unlink_first_table(bool *link_to_local)
select_lex.table_list.elements--; //safety
first->next_local= 0;
/*
reorder global list to keep first tables the same in both lists
(if it is need)
Ensure that the global list has the same first table as the local
list.
*/
first_lists_tables_same();
}
......@@ -1729,11 +1745,12 @@ TABLE_LIST *st_lex::unlink_first_table(bool *link_to_local)
st_lex::first_lists_tables_same()
NOTES
In many cases first table of main SELECT_LEX have special meaning =>
check that it is first table in global list and relink it first in
queries_tables list if it is necessary (we need such relinking only
for queries with subqueries in select list, in this case tables of
subqueries will go to global list first)
In many cases (for example, usual INSERT/DELETE/...) the first table of
main SELECT_LEX have special meaning => check that it is the first table
in global list and re-link to be first in the global list if it is
necessary. We need such re-linking only for queries with sub-queries in
the select list, as only in this case tables of sub-queries will go to
the global list first.
*/
void st_lex::first_lists_tables_same()
......@@ -1744,14 +1761,15 @@ void st_lex::first_lists_tables_same()
TABLE_LIST *next;
if (query_tables_last == &first_table->next_global)
query_tables_last= first_table->prev_global;
if ((next= *first_table->prev_global= first_table->next_global))
next->prev_global= first_table->prev_global;
/* include in new place */
first_table->next_global= query_tables;
/*
we are sure that above is not 0, because first_table was not
first table in global list => we can do following without check
We are sure that query_tables is not 0, because first_table was not
first table in the global list => we can use
query_tables->prev_global without check of query_tables
*/
query_tables->prev_global= &first_table->next_global;
first_table->prev_global= &query_tables;
......
sql/sql_parse.cc
View file @ 3ef0b19c
......@@ -108,7 +108,7 @@ static void unlock_locked_tables(THD *thd)
if (thd->locked_tables)
{
thd->lock=thd->locked_tables;
thd->locked_tables=0; // Will be automaticly closed
thd->locked_tables=0; // Will be automatically closed
close_thread_tables(thd); // Free tables
}
}
......@@ -205,13 +205,13 @@ static int get_or_create_user_conn(THD *thd, const char *user,
command originator of the check: now check_user is called
during connect and change user procedures; used for
logging.
passwd scrambled password recieved from client
passwd scrambled password received from client
passwd_len length of scrambled password
db database name to connect to, may be NULL
check_count dont know exactly
Note, that host, user and passwd may point to communication buffer.
Current implementation does not depened on that, but future changes
Current implementation does not depend on that, but future changes
should be done with this in mind; 'thd' is INOUT, all other params
are 'IN'.
......@@ -269,7 +269,7 @@ int check_user(THD *thd, enum enum_server_command command,
/*
Clear thd->db as it points to something, that will be freed when
connection is closed. We don't want to accidently free a wrong pointer
connection is closed. We don't want to accidentally free a wrong pointer
if connect failed. Also in case of 'CHANGE USER' failure, current
database will be switched to 'no database selected'.
*/
......@@ -311,7 +311,7 @@ int check_user(THD *thd, enum enum_server_command command,
/* here res is always >= 0 */
if (res == 0)
{
if (!(thd->master_access & NO_ACCESS)) // authentification is OK
if (!(thd->master_access & NO_ACCESS)) // authentication is OK
{
DBUG_PRINT("info",
("Capabilities: %d packet_length: %ld Host: '%s' "
......@@ -731,7 +731,7 @@ static int check_connection(THD *thd)
#endif /* HAVE_COMPRESS */
#ifdef HAVE_OPENSSL
if (ssl_acceptor_fd)
client_flags |= CLIENT_SSL; /* Wow, SSL is avalaible! */
client_flags |= CLIENT_SSL; /* Wow, SSL is available! */
#endif /* HAVE_OPENSSL */
end= strnmov(buff, server_version, SERVER_VERSION_LENGTH) + 1;
......@@ -1393,7 +1393,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
*passwd++ : strlen(passwd);
db+= passwd_len + 1;
#ifndef EMBEDDED_LIBRARY
/* Small check for incomming packet */
/* Small check for incoming packet */
if ((uint) ((uchar*) db - net->read_pos) > packet_length)
{
send_error(thd, ER_UNKNOWN_COM_ERROR);
......@@ -1428,7 +1428,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
if (res)
{
/* authentification failure, we shall restore old user */
/* authentication failure, we shall restore old user */
if (res > 0)
send_error(thd, ER_UNKNOWN_COM_ERROR);
x_free(thd->user);
......@@ -2397,7 +2397,7 @@ mysql_execute_command(THD *thd)
}
#endif
/*
If we are using SET CHARSET without DEFAULT, add an implicite
If we are using SET CHARSET without DEFAULT, add an implicit
DEFAULT to not confuse old users. (This may change).
*/
if ((lex->create_info.used_fields &
......@@ -3537,7 +3537,7 @@ purposes internal to the MySQL server", MYF(0));
if (thd->locked_tables)
{
thd->lock=thd->locked_tables;
thd->locked_tables=0; // Will be automaticly closed
thd->locked_tables=0; // Will be automatically closed
close_thread_tables(thd); // Free tables
}
if (end_active_trans(thd))
......@@ -3984,7 +3984,7 @@ purposes internal to the MySQL server", MYF(0));
SYNOPSIS
check_one_table_access()
thd Thread handler
privilege requested privelage
privilege requested privilege
all_tables global table list of query
RETURN
......@@ -4126,7 +4126,7 @@ check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
want_access Use should have any of these global rights
WARNING
One gets access rigth if one has ANY of the rights in want_access
One gets access right if one has ANY of the rights in want_access
This is useful as one in most cases only need one global right,
but in some case we want to check if the user has SUPER or
REPL_CLIENT_ACL rights.
......@@ -4888,7 +4888,7 @@ bool add_field_to_list(THD *thd, char *field_name, enum_field_types type,
/*
We are setting TIMESTAMP_OLD_FIELD here only temporary, we will
replace this value by TIMESTAMP_DNUN_FIELD or NONE later when
information about all TIMESTAMP fields in table will be availiable.
information about all TIMESTAMP fields in table will be available.
*/
new_field->unireg_check= on_update_value?Field::TIMESTAMP_UN_FIELD:
Field::TIMESTAMP_OLD_FIELD;
......@@ -5315,7 +5315,7 @@ TABLE_LIST *st_select_lex::nest_last_join(THD *thd)
/*
Save names for a join with using clase
Save names for a join with using clause
SYNOPSIS
save_names_for_using_list
......@@ -6168,7 +6168,7 @@ int create_table_precheck(THD *thd, TABLE_LIST *tables,
SYNOPSIS
negate_expression()
thd therad handler
thd thread handler
expr expression for negation
RETURN
......
sql/sql_show.cc
View file @ 3ef0b19c
......@@ -762,7 +762,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild,
protocol->store(field->has_charset() ? field->charset()->name : "NULL",
system_charset_info);
/*
Altough TIMESTAMP fields can't contain NULL as its value they
Although TIMESTAMP fields can't contain NULL as its value they
will accept NULL if you will try to insert such value and will
convert it to current TIMESTAMP. So YES here means that NULL
is allowed for assignment but can't be returned.
......@@ -781,7 +781,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild,
{
/*
We have NOW() as default value but we use CURRENT_TIMESTAMP form
because it is more SQL standard comatible
because it is more SQL standard compatible
*/
protocol->store("CURRENT_TIMESTAMP", system_charset_info);
}
......@@ -1213,7 +1213,7 @@ mysqld_dump_create_info(THD *thd, TABLE *table, int fd)
/*
Go through all character combinations and ensure that sql_lex.cc can
parse it as an identifer.
parse it as an identifier.
SYNOPSIS
require_quotes()
......
sql/sql_update.cc
View file @ 3ef0b19c
......@@ -72,7 +72,7 @@ static bool check_fields(THD *thd, List<Item> &items)
{
if (!(field= item->filed_for_view_update()))
{
/* as far as item comes from VIEW select list it has name */
/* item has name, because it comes from VIEW SELECT list */
my_error(ER_NONUPDATEABLE_COLUMN, MYF(0), item->name);
return TRUE;
}
......@@ -589,8 +589,9 @@ int mysql_multi_update_prepare(THD *thd)
}
/*
setup_tables() need for VIEWs. JOIN::prepare() will not do it second
time.
setup_tables() need for VIEWs. JOIN::prepare() will call setup_tables()
second time, but this call will do nothing (there are check for second
call in setup_tables()).
*/
if (setup_tables(thd, table_list, &lex->select_lex.where) ||
(thd->lex->select_lex.no_wrap_view_item= 1,
......
sql/sql_view.cc
View file @ 3ef0b19c
......@@ -80,6 +80,18 @@ int mysql_create_view(THD *thd,
}
#ifndef NO_EMBEDDED_ACCESS_CHECKS
/*
Privilege check for view creation:
- user have CREATE VIEW privilege on view table
- have some (SELECT/UPDATE/INSERT/DELETE) privileges on columns of
underlying tables used on top of SELECT list (because it can be
(theoretically) updated, so it is enough to have UPDATE privilege on
them, for example)
- have SELECT privilege on columns used in expressions of VIEW select
- for columns of underly tables used on top of SELECT list also will be
checked that we have not more privileges on correspondent column of view
table (i.e. user will not get some privileges by view creation)
*/
if (check_access(thd, CREATE_VIEW_ACL, view->db, &view->grant.privilege,
0, 0) ||
grant_option && check_grant(thd, CREATE_VIEW_ACL, view, 0, 1, 0))
......@@ -89,7 +101,7 @@ int mysql_create_view(THD *thd,
for (tbl= sl->get_table_list(); tbl; tbl= tbl->next_local)
{
/*
Ensure that we have some privilage on this table, more strict check
Ensure that we have some privileges on this table, more strict check
will be done on column level after preparation,
*/
if (check_some_access(thd, VIEW_ANY_ACL, tbl))
......@@ -103,16 +115,20 @@ int mysql_create_view(THD *thd,
tbl->real_name);
DBUG_RETURN(-1);
}
/* mark this table as table which will be checked after preparation */
/*
Mark this table as a table which will be checked after the prepare
phase
*/
tbl->table_in_first_from_clause= 1;
/*
We need to check only SELECT_ACL for all normal fields, fields
where we need any privilege will be marked later
We need to check only SELECT_ACL for all normal fields, fields for
which we need "any" (SELECT/UPDATE/INSERT/DELETE) privilege will be
checked later
*/
tbl->grant.want_privilege= SELECT_ACL;
/*
Make sure that all rights are loaded to table 'grant' field.
Make sure that all rights are loaded to the TABLE::grant field.
tbl->real_name will be correct name of table because VIEWs are
not opened yet.
......@@ -140,7 +156,7 @@ int mysql_create_view(THD *thd,
}
}
/*
Mark fields for special privilege check (any privilege)
Mark fields for special privilege check ("any" privilege)
*/
for (sl= select_lex; sl; sl= sl->next_select())
{
......@@ -169,14 +185,14 @@ int mysql_create_view(THD *thd,
}
/*
Copy privileges of underlaying VIEWs which was filled by
Copy the privileges of the underlying VIEWs which were filled by
fill_effective_table_privileges
(they was not copied in derived tables processing)
(they were not copied at derived tables processing)
*/
tbl->table->grant.privilege= tbl->grant.privilege;
}
// prepare select to resolve all fields
/* prepare select to resolve all fields */
lex->view_prepare_mode= 1;
if (unit->prepare(thd, 0, 0))
{
......@@ -227,7 +243,7 @@ int mysql_create_view(THD *thd,
#ifndef NO_EMBEDDED_ACCESS_CHECKS
/*
Compare/check grants on view with grants of underlaying tables
Compare/check grants on view with grants of underlying tables
*/
for (sl= select_lex; sl; sl= sl->next_select())
{
......@@ -245,7 +261,7 @@ int mysql_create_view(THD *thd,
if ((fld= item->filed_for_view_update()))
{
/*
Do we have more privilegeson view field then underlying table field
Do we have more privileges on view field then underlying table field?
*/
if ((~fld->have_privileges & priv))
{
......@@ -354,7 +370,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
LEX_STRING dir, file;
DBUG_ENTER("mysql_register_view");
// print query
/* print query */
str.length(0);
{
ulong sql_mode= thd->variables.sql_mode & MODE_ANSI_QUOTES;
......@@ -365,7 +381,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
str.append('\0');
DBUG_PRINT("VIEW", ("View: %s", str.ptr()));
// print file name
/* print file name */
(void) my_snprintf(dir_buff, FN_REFLEN, "%s/%s/",
mysql_data_home, view->db);
unpack_filename(dir_buff, dir_buff);
......@@ -379,7 +395,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
if (!view->timestamp.str)
view->timestamp.str= view->timestamp_buffer;
// check old .frm
/* check old .frm */
{
char path_buff[FN_REFLEN];
LEX_STRING path;
......@@ -411,7 +427,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
/*
read revision number
TODO: read dependense list, too, to process cascade/restrict
TODO: read dependence list, too, to process cascade/restrict
TODO: special cascade/restrict procedure for alter?
*/
if (parser->parse((gptr)view, &thd->mem_root,
......@@ -429,7 +445,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
}
}
}
// fill structure
/* fill structure */
view->query.str= (char*)str.ptr();
view->query.length= str.length()-1; // we do not need last \0
view->source.str= thd->query;
......@@ -451,7 +467,7 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
if ((view->updatable_view= (can_be_merged &&
view->algorithm != VIEW_ALGORITHM_TMPTABLE)))
{
// TODO: change here when we will support UNIONs
/* TODO: change here when we will support UNIONs */
for (TABLE_LIST *tbl= (TABLE_LIST *)thd->lex->select_lex.table_list.first;
tbl;
tbl= tbl->next_local)
......@@ -491,7 +507,6 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
RETURN
0 ok
1 error
*/
my_bool
......@@ -632,7 +647,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
/*
check rights to run commands (EXPLAIN SELECT & SHOW CREATE) which show
underlaying tables
underlying tables
*/
if ((old_lex->sql_command == SQLCOM_SELECT && old_lex->describe))
{
......@@ -682,7 +697,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
/*
check MERGE algorithm ability
- algorithm is not explicit TEMPORARY TABLE
- VIEW SELECT allow marging
- VIEW SELECT allow merging
- VIEW used in subquery or command support MERGE algorithm
*/
if (table->algorithm != VIEW_ALGORITHM_TMPTABLE &&
......@@ -705,7 +720,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
/*
next table should include SELECT_LEX under this table SELECT_LEX
TODO: ehere should be loop for multi tables substitution
TODO: here should be loop for multi tables substitution
*/
table->ancestor->select_lex= table->select_lex;
/*
......@@ -714,7 +729,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
*/
view_tables->lock_type= table->lock_type;
/* Store WHERE clause for postprocessing in setup_ancestor */
/* Store WHERE clause for post-processing in setup_ancestor */
table->where= lex->select_lex.where;
/*
......@@ -866,6 +881,13 @@ frm_type_enum mysql_frm_type(char *path)
thd thread handler
view view for check with opened table
DESCRIPTION
check that undertlaying table of viey contain one of following:
1) primary key of underlying table
2) unique key underlying table with fields for which NULL value is
impossible
3) all fields of underlying table
RETURN
FALSE OK
TRUE view do not contain key or all fields
......@@ -935,7 +957,7 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
0 == NO ; Don't give any errors
1 == YES ; Give always an error
2 == LIMIT1 ; Give an error if this is used with LIMIT 1
This is used to protect against gui programs that
This is used to protect against GUI programs that
uses LIMIT 1 to update just the current row. This
doesn't work reliable if the view doesn't have a
unique key or if the view doesn't use all fields in
......
sql/sql_yacc.yy
View file @ 3ef0b19c
......@@ -2423,8 +2423,8 @@ create_select:
else if (lex->sql_command == SQLCOM_REPLACE)
lex->sql_command= SQLCOM_REPLACE_SELECT;
/*
following work only with local list, global list is
created correctly in this case
The following work only with the local list, the global list
is created correctly in this case
*/
lex->current_select->table_list.save_and_clear(&lex->save_list);
mysql_init_select(lex);
......@@ -2437,8 +2437,8 @@ create_select:
opt_select_from
{
/*
following work only with local list, global list is
created correctly in this case
The following work only with the local list, the global list
is created correctly in this case
*/
Lex->current_select->table_list.push_front(&Lex->save_list);
}
......
sql/table.cc
View file @ 3ef0b19c
......@@ -169,7 +169,7 @@ int openfrm(THD *thd, const char *name, const char *alias, uint db_stat,
outparam->db_record_offset=1;
if (db_create_options & HA_OPTION_LONG_BLOB_PTR)
outparam->blob_ptr_size=portable_sizeof_char_ptr;
/* Set temporaryly a good value for db_low_byte_first */
/* Set temporarily a good value for db_low_byte_first */
outparam->db_low_byte_first=test(outparam->db_type != DB_TYPE_ISAM);
error=4;
outparam->max_rows=uint4korr(head+18);
......@@ -710,7 +710,7 @@ int openfrm(THD *thd, const char *name, const char *alias, uint db_stat,
outparam->blob_field=
(Field_blob**) (outparam->field+outparam->fields); // Point at null ptr
/* The table struct is now initialzed; Open the table */
/* The table struct is now initialized; Open the table */
error=2;
if (db_stat)
{
......@@ -759,7 +759,7 @@ int openfrm(THD *thd, const char *name, const char *alias, uint db_stat,
my_pthread_setspecific_ptr(THR_MALLOC,old_root);
frm_error(error,outparam,name,ME_ERROR+ME_WAITTANG);
delete outparam->file;
outparam->file=0; // For easyer errorchecking
outparam->file=0; // For easier errorchecking
outparam->db_stat=0;
hash_free(&outparam->name_hash);
free_root(&outparam->mem_root,MYF(0));
......@@ -788,7 +788,7 @@ int closefrm(register TABLE *table)
table->fields=0;
}
delete table->file;
table->file=0; /* For easyer errorchecking */
table->file=0; /* For easier errorchecking */
hash_free(&table->name_hash);
free_root(&table->mem_root,MYF(0));
DBUG_RETURN(error);
......@@ -985,7 +985,7 @@ static void frm_error(int error, TABLE *form, const char *name, myf errortype)
/*
** fix a str_type to a array type
** typeparts sepearated with some char. differents types are separated
** typeparts separated with some char. differents types are separated
** with a '\0'
*/
......@@ -1072,7 +1072,7 @@ static uint find_field(TABLE *form,uint start,uint length)
}
/* Check that the integer is in the internvall */
/* Check that the integer is in the internal */
int set_zone(register int nr, int min_zone, int max_zone)
{
......@@ -1136,7 +1136,7 @@ void append_unescaped(String *res, const char *pos, uint length)
res->append('n');
break;
case '\r':
res->append('\\'); /* This gives better readbility */
res->append('\\'); /* This gives better readability */
res->append('r');
break;
case '\\':
......@@ -1500,15 +1500,17 @@ void st_table_list::set_ancestor()
thd - thread handler
conds - condition of this JOIN
DESCRIPTION
It is:
- preparing translation table for view columns (fix_fields() for every
call and creation for first call)
- preparing WHERE, ON and CHECK OPTION condition (fix_fields() for every
call and merging for first call).
If there are underlying view(s) procedure first will be called for them.
RETURN
0 - OK
1 - error
TODO: for several substituted table last set up table (or maybe subtree,
it depends on future join implementation) will contain all fields of VIEW
(to be able call fix_fields() for them. All other will looks like empty
(without fields) for name resolving, but substituted expressions will
return correct used tables mask.
*/
bool st_table_list::setup_ancestor(THD *thd, Item **conds)
......@@ -1619,7 +1621,7 @@ bool st_table_list::setup_ancestor(THD *thd, Item **conds)
{
/*
Store WHERE condition to ON expression for outer join, because
we can't use WHERE to correctly execute jeft joins on VIEWs and
we can't use WHERE to correctly execute left joins on VIEWs and
this expression will not be moved to WHERE condition (i.e. will
be clean correctly for PS/SP)
*/
......@@ -1633,7 +1635,7 @@ bool st_table_list::setup_ancestor(THD *thd, Item **conds)
{
/*
Store WHERE condition to ON expression for outer join, because
we can't use WHERE to correctly execute jeft joins on VIEWs and
we can't use WHERE to correctly execute left joins on VIEWs and
this expression will not be moved to WHERE condition (i.e. will
be clean correctly for PS/SP)
*/
......
sql/table.h
View file @ 3ef0b19c
......@@ -34,7 +34,7 @@ typedef struct st_order {
bool asc; /* true if ascending */
bool free_me; /* true if item isn't shared */
bool in_field_list; /* true if in select field list */
bool counter_used; /* parapeter was counter of columns */
bool counter_used; /* parameter was counter of columns */
Field *field; /* If tmp-table group */
char *buff; /* If tmp-table group */
table_map used,depend_map;
......@@ -116,7 +116,7 @@ struct st_table {
These two members hold offset in record + 1 for TIMESTAMP field
with NOW() as default value or/and with ON UPDATE NOW() option.
If 0 then such field is absent in this table or auto-set for default
or/and on update should be temporaly disabled for some reason.
or/and on update should be temporally disabled for some reason.
These values is setup to offset value for each statement in open_table()
and turned off in statement processing code (see mysql_update as example).
*/
......@@ -235,10 +235,10 @@ typedef struct st_table_list
Item *where; /* VIEW WHERE clause condition */
Item *check_option; /* WITH CHECK OPTION condition */
LEX_STRING query; /* text of (CRETE/SELECT) statement */
LEX_STRING md5; /* md5 of query tesxt */
LEX_STRING md5; /* md5 of query text */
LEX_STRING source; /* source of CREATE VIEW */
LEX_STRING view_db; /* save view database */
LEX_STRING view_name; /* save view name */
LEX_STRING view_db; /* saved view database */
LEX_STRING view_name; /* saved view name */
LEX_STRING timestamp; /* GMT time stamp of last operation */
ulonglong file_version; /* version of file's field set */
ulonglong updatable_view; /* VIEW can be updated */
......@@ -263,11 +263,11 @@ typedef struct st_table_list
st_table_list *embedding; /* nested join containing the table */
List<struct st_table_list> *join_list;/* join list the table belongs to */
bool cacheable_table; /* stop PS caching */
/* used in multi-upd/views privelege check */
/* used in multi-upd/views privilege check */
bool table_in_first_from_clause;
bool skip_temporary; /* this table shouldn't be temporary */
bool setup_is_done; /* setup_tables() is done */
/* do view contain auto_increment field */
/* TRUE if this merged view contain auto_increment field */
bool contain_auto_increment;
/* FRMTYPE_ERROR if any type is acceptable */
enum frm_type_enum required_type;
......
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