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return table list of fake_select in empty state to prevent using TABLE_LIST allocated on stack in next execution of PS (Bug #3577)

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sql/sql_union.cc:
  return table list of fake_select in empty state to prevent using TABLE_LIST allocated on stack in next execution of PS
tests/client_test.c:
  test of UNIONS with PS
This commit is contained in:
unknown
2004-05-03 13:58:01 +03:00
parent 73ff0958c0
commit bcbaefcf97
2 changed files with 41 additions and 0 deletions
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5
sql/sql_union.cc
View File

@@ -401,7 +401,10 @@ int st_select_lex_unit::exec()
*/
if (!(fake_select_lex->join= new JOIN(thd, item_list, thd->options,
result)))
{
fake_select_lex->table_list.empty();
DBUG_RETURN(-1);
}
/*
Fake st_select_lex should have item list for correctref_array
@@ -427,6 +430,8 @@ int st_select_lex_unit::exec()
(ORDER*) NULL, NULL, (ORDER*) NULL,
options_tmp | SELECT_NO_UNLOCK,
result, this, fake_select_lex);
fake_select_lex->table_list.empty();
if (!res)
thd->limit_found_rows = (ulonglong)table->file->records + add_rows;
/*

36
tests/client_test.c
View File

@@ -9397,6 +9397,41 @@ static void test_bug3035()
mysql_real_query(mysql, stmt_text, strlen(stmt_text));
}
static void test_union2()
{
MYSQL_STMT *stmt;
int rc, i;
myheader("test_union2");
rc= mysql_query(mysql, "DROP TABLE IF EXISTS t1");
myquery(rc);
rc= mysql_query(mysql,"CREATE TABLE t1(col1 INT,\
col2 VARCHAR(40), \
col3 SMALLINT,\
col4 TIMESTAMP)");
myquery(rc);
stmt= mysql_simple_prepare(mysql,
"select col1 FROM t1 where col1=1 union distinct \
select col1 FROM t1 where col1=2");
check_stmt(stmt);
for (i= 0; i < 3; i++)
{
rc= mysql_stmt_execute(stmt);
check_execute(stmt,rc);
assert(0 == my_process_stmt_result(stmt));
}
mysql_stmt_close(stmt);
rc= mysql_query(mysql, "DROP TABLE t1");
myquery(rc);
}
/*
Read and parse arguments and MySQL options from my.cnf
*/
@@ -9676,6 +9711,7 @@ int main(int argc, char **argv)
test_derived(); /* derived table with parameter BUG#3020 */
test_xjoin(); /* complex join test */
test_bug3035(); /* inserts of INT32_MAX/UINT32_MAX */
test_union2(); /* repeatable execution of union (Bug #3577) */
end_time= time((time_t *)0);
total_time+= difftime(end_time, start_time);