File: table_elim_debug.test

package info (click to toggle)
mariadb 1%3A11.8.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 772,520 kB
  • sloc: ansic: 2,414,714; cpp: 1,791,394; asm: 381,336; perl: 62,905; sh: 49,647; pascal: 40,897; java: 39,363; python: 20,791; yacc: 20,432; sql: 17,907; xml: 12,344; ruby: 8,544; cs: 6,542; makefile: 6,145; ada: 1,879; lex: 1,193; javascript: 996; objc: 80; tcl: 73; awk: 46; php: 22
file content (28 lines) | stat: -rw-r--r-- 818 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
#
# Table elimination (MWL#17) tests that need debug build
#
# In MariaDB 5.3, one can switch table_elimination on/off without debug, too: 
## --source include/have_debug.inc

--disable_warnings
drop table if exists t1, t2;
--enable_warnings

# Check if optimizer_switch works

create table t1 (a int);
insert into t1 values (0),(1),(2),(3);

create table t2 (a int primary key, b int) 
  as select a, a as b from t1 where a in (1,2);

explain select t1.a from t1 left join t2 on t2.a=t1.a;

set optimizer_switch='table_elimination=off';
explain select t1.a from t1 left join t2 on t2.a=t1.a;
set optimizer_switch='table_elimination=on';
explain select t1.a from t1 left join t2 on t2.a=t1.a;
set optimizer_switch='table_elimination=default';
explain select t1.a from t1 left join t2 on t2.a=t1.a;

drop table t1, t2;