drop table if exists t1,t2; select 1, 1.0, -1, "hello", NULL; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def 1 8 1 1 N 32897 0 63 def 1.0 246 4 3 N 129 1 63 def -1 8 2 2 N 32897 0 63 def hello 253 5 5 N 1 31 8 def NULL 6 0 0 Y 32896 0 63 1 1.0 -1 hello NULL 1 1.0 -1 hello NULL create table t1 (a tinyint, b smallint, c mediumint, d int, e bigint, f float(3,2), g double(4,3), h decimal(5,4), i year, j date, k timestamp, l datetime, m enum('a','b'), n set('a','b'), o char(10)); select * from t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 a a 1 4 0 Y 32768 0 63 def test t1 t1 b b 2 6 0 Y 32768 0 63 def test t1 t1 c c 9 9 0 Y 32768 0 63 def test t1 t1 d d 3 11 0 Y 32768 0 63 def test t1 t1 e e 8 20 0 Y 32768 0 63 def test t1 t1 f f 4 3 0 Y 32768 2 63 def test t1 t1 g g 5 4 0 Y 32768 3 63 def test t1 t1 h h 246 7 0 Y 0 4 63 def test t1 t1 i i 13 4 0 Y 32864 0 63 def test t1 t1 j j 10 10 0 Y 128 0 63 def test t1 t1 k k 7 19 0 N 9441 0 63 def test t1 t1 l l 12 19 0 Y 128 0 63 def test t1 t1 m m 254 1 0 Y 256 0 8 def test t1 t1 n n 254 3 0 Y 2048 0 8 def test t1 t1 o o 254 10 0 Y 0 0 8 a b c d e f g h i j k l m n o select a b, b c from t1 as t2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t2 a b 1 4 0 Y 32768 0 63 def test t1 t2 b c 2 6 0 Y 32768 0 63 b c drop table t1; CREATE TABLE t1 (id tinyint(3) default NULL, data varchar(255) default NULL); INSERT INTO t1 VALUES (1,'male'),(2,'female'); CREATE TABLE t2 (id tinyint(3) unsigned default NULL, data char(3) default '0'); INSERT INTO t2 VALUES (1,'yes'),(2,'no'); select t1.id, t1.data, t2.data from t1, t2 where t1.id = t2.id; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 id id 1 3 1 Y 32768 0 63 def test t1 t1 data data 253 255 6 Y 0 0 8 def test t2 t2 data data 254 3 3 Y 0 0 8 id data data 1 male yes 2 female no select t1.id, t1.data, t2.data from t1, t2 where t1.id = t2.id order by t1.id; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 id id 1 3 1 Y 32768 0 63 def test t1 t1 data data 253 255 6 Y 0 0 8 def test t2 t2 data data 254 3 3 Y 0 0 8 id data data 1 male yes 2 female no select t1.id from t1 union select t2.id from t2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def id id 1 4 1 Y 32768 0 63 id 1 2 drop table t1,t2; create table t1 ( a int, b varchar(30), primary key(a)); insert into t1 values (1,'one'); insert into t1 values (2,'two'); set @arg00=1 ; select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def @arg00 @arg00 8 20 1 Y 32768 0 63 @arg00 1 select * from (select @arg00) aaa; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def aaa @arg00 @arg00 8 20 1 Y 32768 0 63 @arg00 1 select 1 union select 1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def 1 1 8 20 1 N 32769 0 63 1 1 select * from (select 1 union select 1) aaa; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def aaa 1 1 8 20 1 N 32769 0 63 1 1 drop table t1; create table t1 (i int); insert into t1 values (1),(2),(3); select * from t1 where i = 2; drop table t1;// affected rows: 0 affected rows: 3 info: Records: 3 Duplicates: 0 Warnings: 0 i 2 affected rows: 1 affected rows: 0 create table t1 (id int(10)); insert into t1 values (1); CREATE VIEW v1 AS select t1.id as id from t1; CREATE VIEW v2 AS select t1.id as renamed from t1; CREATE VIEW v3 AS select t1.id + 12 as renamed from t1; select * from v1 group by id limit 1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v1 id id 3 10 1 Y 32768 0 63 id 1 select * from v1 group by id limit 0; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test v1 v1 id id 3 10 0 Y 32768 0 63 id select * from v1 where id=1000 group by id; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test v1 v1 id id 3 10 0 Y 32768 0 63 id select * from v1 where id=1 group by id; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v1 id id 3 10 1 Y 32768 0 63 id 1 select * from v2 where renamed=1 group by renamed; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v2 id renamed 3 10 1 Y 32768 0 63 renamed 1 select * from v3 where renamed=1 group by renamed; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def v3 v3 renamed renamed 8 12 0 Y 32896 0 63 renamed drop table t1; drop view v1,v2,v3; select a.* from (select 2147483648 as v_large) a; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def a v_large v_large 8 10 10 N 32769 0 63 v_large 2147483648 select a.* from (select 214748364 as v_small) a; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def a v_small v_small 3 9 9 N 32769 0 63 v_small 214748364 CREATE TABLE t1 (c1 CHAR(1)); CREATE TABLE t2 (c2 CHAR(1)); CREATE VIEW v1 AS SELECT t1.c1 FROM t1; CREATE VIEW v2 AS SELECT t2.c2 FROM t2; INSERT INTO t1 VALUES ('1'), ('2'), ('3'); INSERT INTO t2 VALUES ('1'), ('2'), ('3'), ('2'); SELECT v1.c1 FROM v1 JOIN t2 ON c1=c2 ORDER BY 1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v1 c1 c1 254 1 1 Y 0 0 8 c1 1 2 2 3 SELECT v1.c1, v2.c2 FROM v1 JOIN v2 ON c1=c2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test v1 v1 c1 c1 254 1 1 Y 0 0 8 def test v2 v2 c2 c2 254 1 1 Y 0 0 8 c1 c2 1 1 2 2 3 3 2 2 SELECT v1.c1, v2.c2 FROM v1 JOIN v2 ON c1=c2 GROUP BY v1.c1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v1 c1 c1 254 1 1 Y 32768 0 8 def test t2 v2 c2 c2 254 1 1 Y 0 0 8 c1 c2 1 1 2 2 3 3 SELECT v1.c1, v2.c2 FROM v1 JOIN v2 ON c1=c2 GROUP BY v1.c1 ORDER BY v2.c2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 v1 c1 c1 254 1 1 Y 32768 0 8 def test t2 v2 c2 c2 254 1 1 Y 0 0 8 c1 c2 1 1 2 2 3 3 DROP VIEW v1,v2; DROP TABLE t1,t2; CREATE TABLE t1 (i INT, d DATE); INSERT INTO t1 VALUES (1, '2008-01-01'), (2, '2008-01-02'), (3, '2008-01-03'); SELECT COALESCE(d, d), IFNULL(d, d), IF(i, d, d), CASE i WHEN i THEN d ELSE d END, GREATEST(d, d), LEAST(d, d) FROM t1 ORDER BY RAND(); Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr 2008-01-01 2008-01-01 2008-01-01 2008-01-01 2008-01-01 2008-01-01 2008-01-02 2008-01-02 2008-01-02 2008-01-02 2008-01-02 2008-01-02 2008-01-03 2008-01-03 2008-01-03 2008-01-03 2008-01-03 2008-01-03 COALESCE(d, d) IFNULL(d, d) IF(i, d, d) CASE i WHEN i THEN d ELSE d END GREATEST(d, d) LEAST(d, d) def CASE i WHEN i THEN d ELSE d END CASE i WHEN i THEN d ELSE d END 10 10 10 Y 128 0 63 def COALESCE(d, d) COALESCE(d, d) 10 10 10 Y 128 0 63 def GREATEST(d, d) GREATEST(d, d) 10 10 10 Y 128 0 63 def IF(i, d, d) IF(i, d, d) 10 10 10 Y 128 0 63 def IFNULL(d, d) IFNULL(d, d) 10 10 10 Y 128 0 63 def LEAST(d, d) LEAST(d, d) 10 10 10 Y 128 0 63 DROP TABLE t1; # # Bug#41788 mysql_fetch_field returns org_table == table by a view # CREATE TABLE t1 (f1 INT); CREATE VIEW v1 AS SELECT f1 FROM t1; SELECT f1 FROM v1 va; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test v1 va f1 f1 3 11 0 Y 32768 0 63 f1 DROP VIEW v1; DROP TABLE t1; End of 5.0 tests