MDEV-406: ANALYZE $stmt

-Add analyze_stmt.test/result

mysql-test/r/analyze_stmt.result

+drop table if exists t0,t1,t2,t3;
+create table t0 (a int) engine=myisam;
+INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t1 (a int) engine=myisam;
+INSERT INTO t1 select * from t0;
+# Try a few basic selects to see that r_rows and r_filtered columns work
+analyze select * from t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	100.00	
+analyze select * from t1 where a<5;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	50.00	Using where
+analyze select * from t1 where a>100;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10	100.00	0.00	Using where
+# ANALYZE DELETE will delete rows:
+analyze delete from t1 where a in (2,3,4);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	NULL	100.00	30.00	Using where
+select * from t1;
+a
+0
+1
+5
+6
+7
+8
+9
+drop table t1;
+# ANALYZE UPDATE will make updates:
+create table t1(a int, b int);
+insert into t1 select a,a from t0;
+analyze update t1 set b=100+b where a in (6,7,8);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	NULL	100.00	30.00	Using where
+select * from t1;
+a	b
+0	0
+1	1
+2	2
+3	3
+4	4
+5	5
+6	106
+7	107
+8	108
+9	9
+drop table t1;
+drop table t0;

mysql-test/t/analyze_stmt.test

+#
+#  Tests for "ANALYZE $statement" feature (PostgreSQL's analog is called EXPLAIN ANALYZE)
+#
+--disable_warnings
+drop table if exists t0,t1,t2,t3;
+--enable_warnings
+
+create table t0 (a int) engine=myisam;
+INSERT INTO t0 VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+
+create table t1 (a int) engine=myisam;
+INSERT INTO t1 select * from t0;
+
+--echo # Try a few basic selects to see that r_rows and r_filtered columns work
+analyze select * from t1;
+analyze select * from t1 where a<5;
+analyze select * from t1 where a>100;
+
+--echo # ANALYZE DELETE will delete rows:
+analyze delete from t1 where a in (2,3,4);
+select * from t1;
+drop table t1;
+
+--echo # ANALYZE UPDATE will make updates:
+create table t1(a int, b int);
+insert into t1 select a,a from t0;
+analyze update t1 set b=100+b where a in (6,7,8);
+select * from t1;
+drop table t1;
+
+drop table t0;