diff --git a/mysql-test/r/endspace.result b/mysql-test/r/endspace.result index 0e68418a80f..003ee7ffd5e 100644 --- a/mysql-test/r/endspace.result +++ b/mysql-test/r/endspace.result @@ -98,7 +98,7 @@ concat('|', text1, '|') |teststring | explain select concat('|', text1, '|') from t1 where text1='teststring '; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range key1 key1 22 NULL 2 Using where +1 SIMPLE t1 ref key1 key1 22 const 2 Using where select concat('|', text1, '|') from t1 where text1 like 'teststring_%'; concat('|', text1, '|') |teststring | diff --git a/mysql-test/r/innodb.result b/mysql-test/r/innodb.result index 38d71ac7a42..496c8aa90d2 100644 --- a/mysql-test/r/innodb.result +++ b/mysql-test/r/innodb.result @@ -1991,7 +1991,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref c c 11 const # Using where; Using index explain select count(*) from t1 where t='a '; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range t t 13 NULL # Using where +1 SIMPLE t1 ref t t 13 const # Using where explain select count(*) from t1 where v like 'a%'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range v v 13 NULL # Using where; Using index diff --git a/mysql-test/r/myisam.result b/mysql-test/r/myisam.result index 0f6e0ad537a..83359048a8c 100644 --- a/mysql-test/r/myisam.result +++ b/mysql-test/r/myisam.result @@ -1071,7 +1071,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref c c 11 const # Using where; Using index explain select count(*) from t1 where t='a '; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range t t 13 NULL # Using where +1 SIMPLE t1 ref t t 13 const # Using where explain select count(*) from t1 where v like 'a%'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range v v 13 NULL # Using where; Using index diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result index f50f4859d48..c3132a1b5f6 100644 --- a/mysql-test/r/select.result +++ b/mysql-test/r/select.result @@ -3785,4 +3785,152 @@ case when 1 then cast(1111111111111111111 as unsigned) else 1 end c, coalesce(cast(1111111111111111111 as unsigned), 1) co; i c co 1111111111111111111 1111111111111111111 1111111111111111111 +CREATE TABLE t1 (name varchar(255)); +CREATE TABLE t2 (name varchar(255), n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +name n +bb 1 +aa 2 +cc 3 +cc  4 +cc 5 +bb 6 +cc 7 +SELECT * FROM t2 ORDER BY name; +name n +aa 2 +bb 1 +bb 6 +cc  4 +cc 3 +cc 5 +cc 7 +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; +name LENGTH(name) n +aa 2 2 +bb 2 1 +bb 3 6 +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref name name 6 const 3 Using where +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +name LENGTH(name) n +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +name LENGTH(name) n +cc 5 3 +cc  4 4 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where; Using filesort +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +name LENGTH(name) n +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref name name 6 test.t1.name 2 +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +name name n +ccc NULL NULL +bb bb 1 +bb bb 6 +cc cc 3 +cc cc 5 +cc cc 7 +aa aa 2 +aa aa 2 +DROP TABLE t1,t2; +CREATE TABLE t1 (name text); +CREATE TABLE t2 (name text, n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +name n +bb 1 +aa 2 +cc 3 +cc  4 +cc 5 +bb 6 +cc 7 +SELECT * FROM t2 ORDER BY name; +name n +aa 2 +bb 1 +bb 6 +cc  4 +cc 3 +cc 5 +cc 7 +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; +name LENGTH(name) n +aa 2 2 +bb 2 1 +bb 3 6 +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref name name 6 const 3 Using where +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +name LENGTH(name) n +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +name LENGTH(name) n +cc 5 3 +cc  4 4 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where; Using filesort +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +name LENGTH(name) n +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref name name 6 test.t1.name 2 +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +name name n +ccc NULL NULL +bb bb 1 +bb bb 6 +cc cc 3 +cc cc 5 +cc cc 7 +aa aa 2 +aa aa 2 +DROP TABLE t1,t2; End of 5.0 tests diff --git a/mysql-test/r/type_blob.result b/mysql-test/r/type_blob.result index 73b67a2241e..b28f404c641 100644 --- a/mysql-test/r/type_blob.result +++ b/mysql-test/r/type_blob.result @@ -610,12 +610,12 @@ create table t1 (id integer primary key auto_increment, txt text, index txt_inde insert into t1 (txt) values ('Chevy'), ('Chevy '), (NULL); select * from t1 where txt='Chevy' or txt is NULL; id txt -3 NULL 1 Chevy 2 Chevy +3 NULL explain select * from t1 where txt='Chevy' or txt is NULL; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range txt_index txt_index 23 NULL 2 Using where +1 SIMPLE t1 ref_or_null txt_index txt_index 23 const 2 Using where select * from t1 where txt='Chevy '; id txt 1 Chevy diff --git a/mysql-test/t/select.test b/mysql-test/t/select.test index c4737814137..ea5fadb2e1b 100644 --- a/mysql-test/t/select.test +++ b/mysql-test/t/select.test @@ -3253,4 +3253,50 @@ select case when 1 then cast(1111111111111111111 as unsigned) else 1 end c, coalesce(cast(1111111111111111111 as unsigned), 1) co; +# +# Bug #22971: indexes on text columns are ignored for ref accesses +# + +CREATE TABLE t1 (name varchar(255)); +CREATE TABLE t2 (name varchar(255), n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +SELECT * FROM t2 ORDER BY name; +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; + +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; + +DROP TABLE t1,t2; + +CREATE TABLE t1 (name text); +CREATE TABLE t2 (name text, n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +SELECT * FROM t2 ORDER BY name; +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; + +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; + +DROP TABLE t1,t2; + --echo End of 5.0 tests diff --git a/sql/sql_select.cc b/sql/sql_select.cc index ed108828909..93f5092fd60 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -2854,15 +2854,9 @@ add_key_field(KEY_FIELD **key_fields,uint and_level, Item_func *cond, /* We can't use indexes if the effective collation of the operation differ from the field collation. - - We also cannot use index on a text column, as the column may - contain 'x' 'x\t' 'x ' and 'read_next_same' will stop after - 'x' when searching for WHERE col='x ' */ if (field->cmp_type() == STRING_RESULT && - (((Field_str*)field)->charset() != cond->compare_collation() || - ((*value)->type() != Item::NULL_ITEM && - (field->flags & BLOB_FLAG) && !field->binary()))) + ((Field_str*)field)->charset() != cond->compare_collation()) return; } }