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MDEV-12874 UPDATE statements with the same source and target

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fix --ps-protocol
This commit is contained in:
Sergei Golubchik 2017-10-03 21:07:27 +02:00
parent 1a74d12da6
commit ac2db256d9
1 changed files with 5 additions and 2 deletions
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7
sql/sql_prepare.cc
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@ -1400,6 +1400,7 @@ static int mysql_test_update(Prepared_statement *stmt,
int res;
THD *thd= stmt->thd;
uint table_count= 0;
TABLE_LIST *update_source_table;
SELECT_LEX *select= &stmt->lex->select_lex;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
uint want_privilege;
@ -1413,9 +1414,11 @@ static int mysql_test_update(Prepared_statement *stmt,
if (mysql_handle_derived(thd->lex, DT_INIT))
goto error;
if (table_list->is_multitable())
if (((update_source_table= unique_table(thd, table_list,
table_list->next_global, 0)) ||
table_list->is_multitable()))
{
DBUG_ASSERT(table_list->view != 0);
DBUG_ASSERT(update_source_table || table_list->view != 0);
DBUG_PRINT("info", ("Switch to multi-update"));
/* pass counter value */
thd->lex->table_count= table_count;