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216 lines
6.6 KiB
PHP
216 lines
6.6 KiB
PHP
################################################################################
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# inc/vcol_select.inc #
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# #
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# Purpose: #
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# Testing different SELECTs. #
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# #
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# #
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#------------------------------------------------------------------------------#
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# Original Author: Andrey Zhakov #
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# Original Date: 2008-09-18 #
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# Change Author: Oleksandr Byelkin (Monty program Ab)
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# Date: 2009-03-24
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# Change: Syntax changed
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################################################################################
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# Table t1 is used below to test:
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# - Join type of ALL (sequential scan of the entire table)
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# - Join type of Index
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# - Join type of Range
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# - Join type of Ref_or_null
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent,
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index (c));
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insert into t1 (a) values (2), (1), (1), (3), (NULL);
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# Table t2 is used below to test:
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# - Join type of system and const
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create table t2 like t1;
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insert into t2 (a) values (1);
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# Table t3 is used below to test
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# - Join type of Eq_ref with a unique virtual column
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# - Join type of Const
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create table t3 (a int primary key,
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b int as (-a),
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c int as (-a) persistent unique);
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insert into t3 (a) values (2),(1),(3);
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--echo # select_type=SIMPLE, type=system
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let $s = select * from t2;
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eval $s;
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eval explain $s;
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let $s = select * from t2 where c=-1;
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eval $s;
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eval explain $s;
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--echo # select_type=SIMPLE, type=ALL
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let $s = select * from t1 where b=-1;
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eval $s;
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eval explain $s;
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--echo # select_type=SIMPLE, type=const
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let $s = select * from t3 where a=1;
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eval $s;
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eval explain $s;
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--echo # select_type=SIMPLE, type=range
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let $s = select * from t3 where c>=-1;
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eval $s;
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eval explain $s;
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--echo # select_type=SIMPLE, type=ref
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let $s = select * from t1,t3 where t1.c=t3.c and t3.c=-1;
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eval $s;
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eval explain $s;
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--echo # select_type=PRIMARY, type=index,ALL
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let $s = select * from t1 where b in (select c from t3);
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eval $s;
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eval explain $s;
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--echo # select_type=PRIMARY, type=range,ref
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let $s = select * from t1 where c in (select c from t3 where c between -2 and -1);
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eval $s;
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eval explain $s;
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--echo # select_type=UNION, type=system
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--echo # select_type=UNION RESULT, type=<union1,2>
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let $s = select * from t1 union select * from t2;
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eval $s;
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eval explain $s;
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--echo # select_type=DERIVED, type=system
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let $s = select * from (select a,b,c from t1) as t11;
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eval $s;
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eval explain $s;
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--echo ###
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--echo ### Using aggregate functions with/without DISTINCT
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--echo ###
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--echo # SELECT COUNT(*) FROM tbl_name
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let $s = select count(*) from t1;
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eval $s;
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eval explain $s;
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--echo # SELECT COUNT(DISTINCT <non-vcol>) FROM tbl_name
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let $s = select count(distinct a) from t1;
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eval $s;
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eval explain $s;
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--echo # SELECT COUNT(DISTINCT <non-stored vcol>) FROM tbl_name
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let $s = select count(distinct b) from t1;
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eval $s;
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eval explain $s;
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--echo # SELECT COUNT(DISTINCT <stored vcol>) FROM tbl_name
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let $s = select count(distinct c) from t1;
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eval $s;
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eval explain $s;
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--echo ###
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--echo ### filesort & range-based utils
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--echo ###
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--echo # SELECT * FROM tbl_name WHERE <vcol expr>
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let $s = select * from t3 where c >= -2;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <non-vcol expr>
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let $s = select * from t3 where a between 1 and 2;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <non-indexed vcol expr>
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let $s = select * from t3 where b between -2 and -1;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <indexed vcol expr>
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let $s = select * from t3 where c between -2 and -1;
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eval $s;
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eval explain $s;
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#### Remove for MyISAM due to a bug
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#### when all the three records are returned (a=1,2,3)
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#### instead of just two (a=1,2).
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#### This bug is presumably in base SQL routines as the same happens
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#### with this table:
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#### create table t4 (a int primary key, b int, c int unique);
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let $myisam_engine = `SELECT @@session.storage_engine='myisam'`;
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if (!$myisam_engine)
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{
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--echo # SELECT * FROM tbl_name WHERE <non-vcol expr> ORDER BY <non-indexed vcol>
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let $s = select * from t3 where a between 1 and 2 order by b;
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eval $s;
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eval explain $s;
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}
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--echo # SELECT * FROM tbl_name WHERE <non-vcol expr> ORDER BY <indexed vcol>
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let $s = select * from t3 where a between 1 and 2 order by c;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <non-vcol>
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let $s = select * from t3 where b between -2 and -1 order by a;
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eval $s;
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eval explain $s;
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#### Remove for MyISAM due to a bug
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#### when all the three records are returned (a=1,2,3)
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#### instead of just two (a=1,2).
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#### This bug is presumably in base SQL routines as the same happens
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#### with this table:
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#### create table t4 (a int primary key, b int, c int unique);
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let $innodb_engine = `SELECT @@session.storage_engine='innodb'`;
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if (!$innodb_engine)
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{
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--echo # SELECT * FROM tbl_name WHERE <indexed vcol expr> ORDER BY <non-vcol>
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let $s = select * from t3 where c between -2 and -1 order by a;
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eval $s;
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eval explain $s;
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}
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--echo # SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <non-indexed vcol>
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let $s = select * from t3 where b between -2 and -1 order by b;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <indexed vcol expr> ORDER BY <non-indexed vcol>
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let $s = select * from t3 where c between -2 and -1 order by b;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <indexed vcol>
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let $s = select * from t3 where b between -2 and -1 order by c;
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eval $s;
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eval explain $s;
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--echo # SELECT * FROM tbl_name WHERE <indexed vcol expr> ORDER BY <indexed vcol>
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let $s = select * from t3 where c between -2 and -1 order by c;
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eval $s;
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eval explain $s;
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--echo # SELECT sum(<non-indexed vcol>) FROM tbl_name GROUP BY <non-indexed vcol>
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let $s = select sum(b) from t1 group by b;
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eval $s;
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eval explain $s;
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--echo # SELECT sum(<indexed vcol>) FROM tbl_name GROUP BY <indexed vcol>
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let $s = select sum(c) from t1 group by c;
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eval $s;
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eval explain $s;
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--echo # SELECT sum(<non-indexed vcol>) FROM tbl_name GROUP BY <indexed vcol>
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let $s = select sum(b) from t1 group by c;
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eval $s;
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eval explain $s;
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--echo # SELECT sum(<indexed vcol>) FROM tbl_name GROUP BY <non-indexed vcol>
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let $s = select sum(c) from t1 group by b;
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eval $s;
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eval explain $s;
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