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sergefp@mysql.com
2004-04-08 17:08:56 +04:00
parent 3b6c3dd2f5 ca75b62d5a
commit ac563b1b8e
13 changed files with 570 additions and 24 deletions
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86
sql/sql_parse.cc
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@ -1959,7 +1959,91 @@ mysql_execute_command(THD *thd)
}
break;
}
case SQLCOM_PREPARE:
{
char *stmt_name= lex->prepared_stmt_name.str;
uint name_len= lex->prepared_stmt_name.length;
Prepared_statement *stmt;
SQL_PREP_STMT_ENTRY *entry;
DBUG_PRINT("info", ("PREPARE: %.*s FROM '%.*s' \n", name_len, stmt_name,
lex->prepared_stmt_code.length,
lex->prepared_stmt_code.str));
if ((entry=(SQL_PREP_STMT_ENTRY*)hash_search(&thd->sql_prepared_stmts,
(byte*)stmt_name, name_len)))
{
/* Free the statement with the same name and reuse hash entry */
thd->stmt_map.erase((Statement*)entry->stmt);
}
else
{
uint size=ALIGN_SIZE(sizeof(SQL_PREP_STMT_ENTRY))+name_len+1;
if (!hash_inited(&thd->sql_prepared_stmts) ||
!(entry= (SQL_PREP_STMT_ENTRY*)my_malloc(size,MYF(MY_WME))))
{
send_error(thd, ER_OUT_OF_RESOURCES);
break;
}
entry->name.str= (char*)entry + ALIGN_SIZE(sizeof(SQL_PREP_STMT_ENTRY));
entry->name.length= name_len;
memcpy(entry->name.str, stmt_name, name_len+1);
if (my_hash_insert(&thd->sql_prepared_stmts, (byte*)entry))
{
my_free((char*)entry,MYF(0));
send_error(thd, ER_OUT_OF_RESOURCES);
break;
}
}
/* Pretend this is a COM_PREPARE query so parser allows placeholders etc*/
thd->command= COM_PREPARE;
/* 'length+1' is for alloc_query that strips the last character */
stmt= mysql_stmt_prepare(thd, lex->prepared_stmt_code.str,
lex->prepared_stmt_code.length + 1, true);
if (stmt)
{
entry->stmt= stmt;
send_ok(thd, 0L, 0L, "Statement prepared");
}
else
hash_delete(&thd->sql_prepared_stmts, (byte*)entry);
break;
}
case SQLCOM_EXECUTE:
{
char *stmt_name= lex->prepared_stmt_name.str;
uint name_len= lex->prepared_stmt_name.length;
SQL_PREP_STMT_ENTRY *entry;
DBUG_PRINT("info", ("EXECUTE: %.*s\n", name_len, stmt_name));
if (!(entry= (SQL_PREP_STMT_ENTRY*)hash_search(&thd->sql_prepared_stmts,
(byte*)stmt_name,
name_len)))
{
send_error(thd, ER_UNKNOWN_STMT_HANDLER, "Undefined prepared statement");
lex->prepared_stmt_params.empty();
break;
}
mysql_sql_stmt_execute(thd, entry->stmt);
lex->prepared_stmt_params.empty();
break;
}
case SQLCOM_DEALLOCATE_PREPARE:
{
char *stmt_name= lex->prepared_stmt_name.str;
uint name_len= lex->prepared_stmt_name.length;
SQL_PREP_STMT_ENTRY *entry;
DBUG_PRINT("info", ("DEALLOCATE PREPARE: %.*s\n", name_len, stmt_name));
if (!(entry= (SQL_PREP_STMT_ENTRY*)hash_search(&thd->sql_prepared_stmts,
(byte*)stmt_name,
name_len)))
{
send_error(thd, ER_UNKNOWN_STMT_HANDLER, "Undefined prepared statement");
break;
}
thd->stmt_map.erase((Statement*)entry->stmt);
hash_delete(&thd->sql_prepared_stmts, (byte*)entry);
send_ok(thd);
break;
}
case SQLCOM_DO:
if (tables && ((res= check_table_access(thd, SELECT_ACL, tables,0)) ||
(res= open_and_lock_tables(thd,tables))))