hanged UDF interface to use clear() instead of reset()

BUILD/FINISH.sh:
  Add just_clean option (for cleanup script)
scripts/mysql_fix_privilege_tables.sql:
  Added 'USE mysql' for easer use on windows
sql/item_sum.cc:
  Changed UDF interface to use clear() instead of reset()
sql/item_sum.h:
  Changed UDF interface to use clear() instead of reset()
sql/slave.cc:
  Fixed checking of eof for slave/master protocol. (Bug #887)
sql/sql_udf.cc:
  Changed UDF interface to use clear() instead of reset()
sql/sql_udf.h:
  Changed UDF interface to use clear() instead of reset()
sql/sql_yacc.yy:
  ERRORS and WARNINGS should not be reserved words
sql/udf_example.cc:
  Changed UDF interface to use clear() instead of reset()

BUILD/FINISH.sh

@@ -23,12 +23,16 @@ autoconf   || (echo \"Can't execute autoconf\"    && exit 1)
 if [ -d gemini ]
 then
    (cd gemini && aclocal && autoheader && aclocal && automake && autoconf)
-fi
+fi"
 
+if [ -z "$just_clean" ]
+then
+commands="$commands
 CFLAGS=\"$cflags\" CXX=\"$CXX\" CXXFLAGS=\"$cxxflags\" CXXLDFLAGS=\"$CXXLDFLAGS\" \
 $configure"
+fi
 
-if [ -z "$just_configure" ]
+if [ -z "$just_configure" -a -z "$just_clean" ]
 then
   commands="$commands
 

BUILD/cleanup

+#! /bin/sh
+
+path=`dirname $0`
+. "$path/SETUP.sh"
+
+just_clean=1;
+
+. "$path/FINISH.sh"

scripts/mysql_fix_privilege_tables.sql

+-- This script converts any old privilege tables to privilege tables suitable
+-- for MySQL 4.0.
+
+-- You can safely ignore all 'Duplicate column' and 'Unknown column' errors"
+-- as this just means that your tables where already up to date.
+-- This script is safe to run even if your tables are already up to date!
+
+-- On unix, you should use the mysql_fix_privilege_tables script to execute
+-- this sql script.
+-- On windows you should do 'mysql --force < mysql_fix_privilege_tables.sql'
+
+USE mysql;
 ALTER TABLE user type=MyISAM;
 ALTER TABLE db type=MyISAM;
 ALTER TABLE host type=MyISAM;

sql/item_sum.cc

@@ -1353,10 +1353,10 @@ longlong Item_sum_count_distinct::val_int()
 
 #ifdef HAVE_DLOPEN
 
-bool Item_udf_sum::reset()
+bool Item_udf_sum::clear()
 {
   DBUG_ENTER("Item_udf_sum::reset");
-  udf.reset(&null_value);
+  udf.clear();
   DBUG_RETURN(0);
 }
 

sql/item_sum.h

@@ -509,7 +509,8 @@ class Item_udf_sum : public Item_sum
   enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
   virtual bool have_field_update(void) const { return 0; }
 
-  bool reset();
+  bool reset() { return 0; }			/* TO BE FIXED */
+  bool clear();
   bool add();
   void reset_field() {};
   void update_field(int offset_arg) {};

sql/slave.cc

@@ -2303,9 +2303,10 @@ server_errno=%d)",
     return packet_error;
   }
 
-  if (len == 1)
+  /* Check if eof packet */
+  if (len < 8 && mysql->net.read_pos[0] == 254)
   {
-     sql_print_error("Slave: received 0 length packet from server, apparent\
+     sql_print_error("Slave: received end packet from server, apparent\
  master shutdown: %s",
 		     mysql_error(mysql));
      return packet_error;

sql/sql_udf.cc

@@ -92,10 +92,13 @@ static void init_syms(udf_func *tmp)
   tmp->func_deinit = dlsym(tmp->dlhandle, nm);
   if (tmp->type == UDFTYPE_AGGREGATE)
   {
-    (void)strmov( end, "_reset" );
-    tmp->func_reset = dlsym( tmp->dlhandle, nm );
+    (void)strmov( end, "_clear" );
+    tmp->func_clear = dlsym( tmp->dlhandle, nm );
     (void)strmov( end, "_add" );
     tmp->func_add = dlsym( tmp->dlhandle, nm );
+    /* Give error if _clear and _add doesn't exists */
+    if (!tmp->func_clear || ! tmp->func_add)
+      tmp->func= 0;
   }
 }
 
@@ -417,7 +420,7 @@ int mysql_create_function(THD *thd,udf_func *udf)
   u_d->func=udf->func;
   u_d->func_init=udf->func_init;
   u_d->func_deinit=udf->func_deinit;
-  u_d->func_reset=udf->func_reset;
+  u_d->func_clear=udf->func_clear;
   u_d->func_add=udf->func_add;
 
   /* create entry in mysql/func table */
@@ -429,7 +432,7 @@ int mysql_create_function(THD *thd,udf_func *udf)
   if (!(table = open_ltable(thd,&tables,TL_WRITE)))
     goto err;
 
-  restore_record(table,default_values);		// Get default values for fields
+  restore_record(table,default_values);		// Default values for fields
   table->field[0]->store(u_d->name.str, u_d->name.length, system_charset_info);
   table->field[1]->store((longlong) u_d->returns);
   table->field[2]->store(u_d->dl,(uint) strlen(u_d->dl), system_charset_info);

sql/sql_udf.h

@@ -33,7 +33,7 @@ typedef struct st_udf_func
   void *func;
   void *func_init;
   void *func_deinit;
-  void *func_reset;
+  void *func_clear;
   void *func_add;
   ulong usage_count;
 } udf_func;
@@ -49,7 +49,7 @@ class udf_handler :public Sql_alloc
   UDF_ARGS f_args;
   UDF_INIT initid;
   char *num_buffer;
-  uchar error;
+  uchar error, is_null;
   bool initialized;
   Item **args;
 
@@ -57,7 +57,7 @@ class udf_handler :public Sql_alloc
   table_map used_tables_cache;
   bool const_item_cache;
   udf_handler(udf_func *udf_arg) :u_d(udf_arg), buffers(0), error(0),
-    initialized(0)
+    is_null(0), initialized(0)
   {}
   ~udf_handler();
   const char *name() const { return u_d ? u_d->name.str : "?"; }
@@ -73,7 +73,6 @@ class udf_handler :public Sql_alloc
       *null_value=1;
       return 0.0;
     }
-    uchar is_null=0;
     double (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
       (double (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func;
     double tmp=func(&initid, &f_args, &is_null, &error);
@@ -92,7 +91,6 @@ class udf_handler :public Sql_alloc
       *null_value=1;
       return LL(0);
     }
-    uchar is_null=0;
     longlong (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
       (longlong (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func;
     longlong tmp=func(&initid, &f_args, &is_null, &error);
@@ -104,22 +102,15 @@ class udf_handler :public Sql_alloc
     *null_value=0;
     return tmp;
   }
-  void reset(my_bool *null_value)
+  void clear()
   {
-    uchar is_null=0;
-    if (get_arguments())
-    {
-      *null_value=1;
-      return;
-    }
-    void (*func)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)=
-    (void (*)(UDF_INIT *, UDF_ARGS *, uchar *, uchar *)) u_d->func_reset;
-    func(&initid, &f_args, &is_null, &error);
-    *null_value= (my_bool) (is_null || error);
+    is_null= 0;
+    void (*func)(UDF_INIT *, uchar *, uchar *)=
+    (void (*)(UDF_INIT *, uchar *, uchar *)) u_d->func_clear;
+    func(&initid, &is_null, &error);
   }
   void add(my_bool *null_value)
   {
-    uchar is_null=0;
     if (get_arguments())
     {
       *null_value=1;

sql/sql_yacc.yy

@@ -4409,6 +4409,7 @@ keyword:
 	| DYNAMIC_SYM		{}
 	| END			{}
 	| ENUM			{}
+	| ERRORS		{}
 	| ESCAPE_SYM		{}
 	| EVENTS_SYM		{}
 	| EXECUTE_SYM		{}
@@ -4546,6 +4547,7 @@ keyword:
 	| USE_FRM		{}
 	| VARIABLES		{}
 	| VALUE_SYM		{}
+	| WARNINGS		{}
 	| WORK_SYM		{}
 	| X509_SYM		{}
 	| YEAR_SYM		{}

sql/udf_example.cc

@@ -149,6 +149,7 @@ longlong sequence(UDF_INIT *initid, UDF_ARGS *args, char *is_null,
 my_bool avgcost_init( UDF_INIT* initid, UDF_ARGS* args, char* message );
 void avgcost_deinit( UDF_INIT* initid );
 void avgcost_reset( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char *error );
+void avgcost_clear( UDF_INIT* initid, char* is_null, char *error );
 void avgcost_add( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char *error );
 double avgcost( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char *error );
 }
@@ -902,21 +903,29 @@ avgcost_deinit( UDF_INIT* initid )
   delete initid->ptr;
 }
 
+
+/* This is only for MySQL 4.0 compability */
 void
-avgcost_reset( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* message )
+avgcost_reset(UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* message)
 {
-  struct avgcost_data* data = (struct avgcost_data*)initid->ptr;
-  data->totalprice	= 0.0;
-  data->totalquantity	= 0;
-  data->count			= 0;
+  avgcost_clear(initid, is_null, message);
+  avgcost_add(initid, args, is_null, message);
+}
 
-  *is_null = 0;
-  avgcost_add( initid, args, is_null, message );
+/* This is needed to get things to work in MySQL 4.1.1 and above */
+
+void
+avgcost_clear(UDF_INIT* initid, char* is_null, char* message)
+{
+  struct avgcost_data* data = (struct avgcost_data*)initid->ptr;
+  data->totalprice=	0.0;
+  data->totalquantity=	0;
+  data->count=		0;
 }
 
 
 void
-avgcost_add( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* message )
+avgcost_add(UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* message)
 {
   if (args->args[0] && args->args[1])
   {