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/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "sql_parse.h" // check_access
#include "sql_table.h" // mysql_alter_table,
// mysql_exchange_partition
#include "sql_alter.h"
#ifdef WITH_WSREP
#include "wsrep_mysqld.h"
#endif /* WITH_WSREP */
bool Alter_table_statement::execute(THD *thd)
{
LEX *lex= thd->lex;
/* first SELECT_LEX (have special meaning for many of non-SELECTcommands) */
SELECT_LEX *select_lex= &lex->select_lex;
/* first table of first SELECT_LEX */
TABLE_LIST *first_table= (TABLE_LIST*) select_lex->table_list.first;
/*
Code in mysql_alter_table() may modify its HA_CREATE_INFO argument,
so we have to use a copy of this structure to make execution
prepared statement- safe. A shallow copy is enough as no memory
referenced from this structure will be modified.
@todo move these into constructor...
*/
HA_CREATE_INFO create_info(lex->create_info);
Alter_info alter_info(lex->alter_info, thd->mem_root);
ulong priv=0;
ulong priv_needed= ALTER_ACL;
bool result;
DBUG_ENTER("Alter_table_statement::execute");
if (thd->is_fatal_error) /* out of memory creating a copy of alter_info */
DBUG_RETURN(TRUE);
/*
We also require DROP priv for ALTER TABLE ... DROP PARTITION, as well
as for RENAME TO, as being done by SQLCOM_RENAME_TABLE
*/
if (alter_info.flags & (ALTER_DROP_PARTITION | ALTER_RENAME))
priv_needed|= DROP_ACL;
/* Must be set in the parser */
DBUG_ASSERT(select_lex->db);
DBUG_ASSERT(!(alter_info.flags & ALTER_ADMIN_PARTITION));
if (check_access(thd, priv_needed, first_table->db,
&first_table->grant.privilege,
&first_table->grant.m_internal,
0, 0) ||
check_access(thd, INSERT_ACL | CREATE_ACL, select_lex->db,
&priv,
NULL, /* Don't use first_tab->grant with sel_lex->db */
0, 0))
DBUG_RETURN(TRUE); /* purecov: inspected */
/* If it is a merge table, check privileges for merge children. */
if (create_info.merge_list.first &&
check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
create_info.merge_list.first, FALSE, UINT_MAX, FALSE))
DBUG_RETURN(TRUE);
if (check_grant(thd, priv_needed, first_table, FALSE, UINT_MAX, FALSE))
DBUG_RETURN(TRUE); /* purecov: inspected */
if (lex->name.str && !test_all_bits(priv, INSERT_ACL | CREATE_ACL))
{
// Rename of table
TABLE_LIST tmp_table;
bzero((char*) &tmp_table,sizeof(tmp_table));
tmp_table.table_name= lex->name.str;
tmp_table.db= select_lex->db;
tmp_table.grant.privilege= priv;
if (check_grant(thd, INSERT_ACL | CREATE_ACL, &tmp_table, FALSE,
UINT_MAX, FALSE))
DBUG_RETURN(TRUE); /* purecov: inspected */
}
/* Don't yet allow changing of symlinks with ALTER TABLE */
if (create_info.data_file_name)
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
WARN_OPTION_IGNORED, ER(WARN_OPTION_IGNORED),
"DATA DIRECTORY");
if (create_info.index_file_name)
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
WARN_OPTION_IGNORED, ER(WARN_OPTION_IGNORED),
"INDEX DIRECTORY");
create_info.data_file_name= create_info.index_file_name= NULL;
thd->enable_slow_log= opt_log_slow_admin_statements;
#ifdef WITH_WSREP
TABLE *find_temporary_table(THD *thd, const TABLE_LIST *tl);
if (WSREP(thd) &&
(!thd->is_current_stmt_binlog_format_row() ||
!find_temporary_table(thd, first_table)))
{
if (wsrep_to_isolation_begin(thd,
lex->name.str ? select_lex->db : NULL,
lex->name.str ? lex->name.str : NULL,
first_table))
{
WSREP_WARN("ALTER TABLE isolation failure");
DBUG_RETURN(TRUE);
}
thd->variables.auto_increment_offset = 1;
thd->variables.auto_increment_increment = 1;
}
#endif /* WITH_WSREP */
result= mysql_alter_table(thd, select_lex->db, lex->name.str,
&create_info,
first_table,
&alter_info,
select_lex->order_list.elements,
select_lex->order_list.first,
lex->ignore, lex->online);
#ifdef WITH_WSREP
#endif /* WITH_WSREP */
DBUG_RETURN(result);
}
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