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varchar.inc
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# Initialise --disable_warnings drop table if exists t1,t2,t3; --enable_warnings disable_query_log; select "--- Testing varchar ---"; enable_query_log; # # Simple basic test that endspace is saved # create table t1 (v varchar(10), c char(10), t text); insert into t1 values('+ ', '+ ', '+ '); set @a=repeat(' ',20); insert into t1 values (concat('+',@a),concat('+',@a),concat('+',@a)); select concat('*',v,'*',c,'*',t,'*') from t1; # Check how columns are copied show create table t1; create table t2 like t1; show create table t2; create table t3 select * from t1; show create table t3; alter table t1 modify c varchar(10); show create table t1; alter table t1 modify v char(10); show create table t1; alter table t1 modify t varchar(10); show create table t1; select concat('*',v,'*',c,'*',t,'*') from t1; drop table t1,t2,t3; # # Testing of keys # create table t1 (v varchar(10), c char(10), t text, key(v), key(c), key(t(10))) stats_persistent=0; show create table t1; disable_query_log; let $1=10; while ($1) { let $2=27; eval set @space=repeat(' ',10-$1); while ($2) { eval set @char=char(ascii('a')+$2-1); insert into t1 values(concat(@char,@space),concat(@char,@space),concat(@char,@space)); dec $2; } dec $1; } enable_query_log; select count(*) from t1; insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1))); select count(*) from t1 where v='a'; select count(*) from t1 where c='a'; select count(*) from t1 where t='a'; select count(*) from t1 where v='a '; select count(*) from t1 where c='a '; select count(*) from t1 where t='a '; select count(*) from t1 where v between 'a' and 'a '; select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; select count(*) from t1 where v like 'a%'; select count(*) from t1 where c like 'a%'; select count(*) from t1 where t like 'a%'; select count(*) from t1 where v like 'a %'; # Test results differ for BDB, see comments in bdb.test # and they are also different from MySAM test results. --replace_column 9 # explain select count(*) from t1 where v='a '; --replace_column 9 # explain select count(*) from t1 where c='a '; --replace_column 9 # explain select count(*) from t1 where t='a '; --replace_column 9 # explain select count(*) from t1 where v like 'a%'; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a '; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; --error ER_DUP_ENTRY alter table t1 add unique(v); alter table t1 add key(v); select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a'; --replace_column 6 # 9 # explain select * from t1 where v='a'; # GROUP BY select v,count(*) from t1 group by v limit 10; select v,count(t) from t1 group by v limit 10; select v,count(c) from t1 group by v limit 10; select sql_big_result v,count(t) from t1 group by v limit 10; select sql_big_result v,count(c) from t1 group by v limit 10; select c,count(*) from t1 group by c limit 10; select c,count(t) from t1 group by c limit 10; select sql_big_result c,count(t) from t1 group by c limit 10; select t,count(*) from t1 group by t limit 10; select t,count(t) from t1 group by t limit 10; select sql_big_result t,count(t) from t1 group by t limit 10; # # Test varchar > 255 bytes # alter table t1 modify v varchar(300), drop key v, drop key v_2, add key v (v); show create table t1; select count(*) from t1 where v='a'; select count(*) from t1 where v='a '; select count(*) from t1 where v between 'a' and 'a '; select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; select count(*) from t1 where v like 'a%'; select count(*) from t1 where v like 'a %'; --replace_column 9 # explain select count(*) from t1 where v='a '; --replace_column 9 # explain select count(*) from t1 where v like 'a%'; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a '; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; --replace_column 9 # explain select * from t1 where v='a'; # GROUP BY select v,count(*) from t1 group by v limit 10; select v,count(t) from t1 group by v limit 10; select sql_big_result v,count(t) from t1 group by v limit 10; # # Test varchar > 255 bytes, key < 255 # alter table t1 drop key v, add key v (v(30)); show create table t1; select count(*) from t1 where v='a'; select count(*) from t1 where v='a '; select count(*) from t1 where v between 'a' and 'a '; select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; select count(*) from t1 where v like 'a%'; select count(*) from t1 where v like 'a %'; --replace_column 9 # explain select count(*) from t1 where v='a '; --replace_column 9 # explain select count(*) from t1 where v like 'a%'; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a '; --replace_column 9 # explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a ' and 'b\n'; --replace_column 9 # explain select * from t1 where v='a'; # GROUP BY select v,count(*) from t1 group by v limit 10; select v,count(t) from t1 group by v limit 10; select sql_big_result v,count(t) from t1 group by v limit 10; # # Test varchar > 512 (special case for GROUP BY becasue of # CONVERT_IF_BIGGER_TO_BLOB define) # alter table t1 modify v varchar(600), drop key v, add key v (v); show create table t1; select v,count(*) from t1 group by v limit 10; select v,count(t) from t1 group by v limit 10; select sql_big_result v,count(t) from t1 group by v limit 10; drop table t1; # # Test unique keys # create table t1 (a char(10), unique (a)); insert into t1 values ('a '); --error ER_DUP_ENTRY insert into t1 values ('a '); alter table t1 modify a varchar(10); --error ER_DUP_ENTRY insert into t1 values ('a '),('a '),('a '),('a '); --error ER_DUP_ENTRY insert into t1 values ('a '); --error ER_DUP_ENTRY insert into t1 values ('a '); --error ER_DUP_ENTRY insert into t1 values ('a '); update t1 set a='a ' where a like 'a%'; select concat(a,'.') from t1; update t1 set a='abc ' where a like 'a '; select concat(a,'.') from t1; update t1 set a='a ' where a like 'a %'; select concat(a,'.') from t1; update t1 set a='a ' where a like 'a '; select concat(a,'.') from t1; drop table t1; # # test show create table # create table t1 (v varchar(10), c char(10), t text, key(v(5)), key(c(5)), key(t(5))); show create table t1; drop table t1; create table t1 (v char(10) character set utf8); show create table t1; drop table t1; create table t1 (v varchar(10), c char(10)) row_format=fixed; show create table t1; insert into t1 values('a','a'),('a ','a '); select concat('*',v,'*',c,'*') from t1; drop table t1; # # Test long varchars # create table t1 (v varchar(65530), key(v(10))); insert into t1 values(repeat('a',65530)); select length(v) from t1 where v=repeat('a',65530); drop table t1; # # Bug #9489: problem with hash indexes # Bug #10802: Index is not used if table using BDB engine on HP-UX # create table t1(a int, b varchar(12), key ba(b, a)); insert into t1 values (1, 'A'), (20, NULL); explain select * from t1 where a=20 and b is null; select * from t1 where a=20 and b is null; drop table t1;