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87e6c2ba77
added string length for more speed made code covarage for print() method of Item fixed printability of some items (SCRUM) (WL#1274) mysql-test/r/auto_increment.result: print() code coverage mysql-test/r/bench_count_distinct.result: print() code coverage mysql-test/r/case.result: print() code coverage mysql-test/r/cast.result: print() code coverage mysql-test/r/ctype_collate.result: print() code coverage mysql-test/r/ctype_many.result: convert with 3 arguments code covarage print() code coverage mysql-test/r/ctype_utf8.result: char_length code coverage mysql-test/r/date_formats.result: print() code coverage mysql-test/r/fulltext.result: print() code coverage mysql-test/r/func_compress.result: print() code coverage mysql-test/r/func_gconcat.result: print() code coverage mysql-test/r/func_group.result: bit_xor() code coverage print() code coverage mysql-test/r/func_if.result: nullif() code coverage print() code coverage mysql-test/r/func_in.result: print() code coverage mysql-test/r/func_math.result: print() code coverage mysql-test/r/func_op.result: print() code coverage mysql-test/r/func_regexp.result: print() code coverage mysql-test/r/func_set.result: print() code coverage mysql-test/r/func_str.result: crc32() code coverage print() code coverage mysql-test/r/func_system.result: print() code coverage mysql-test/r/func_test.result: print() code coverage mysql-test/r/func_time.result: print() code coverage mysql-test/r/group_by.result: print() code coverage mysql-test/r/having.result: print() code coverage mysql-test/r/insert_update.result: print() code coverage mysql-test/r/null.result: print() code coverage mysql-test/r/olap.result: print() code coverage mysql-test/r/query_cache.result: print() code coverage mysql-test/r/row.result: print() code coverage mysql-test/r/rpl000001.result: print() code coverage mysql-test/r/rpl_get_lock.result: print() code coverage mysql-test/r/rpl_master_pos_wait.result: print() code coverage mysql-test/r/select.result: print() code coverage mysql-test/r/subselect.result: print() code coverage mysql-test/r/type_blob.result: print() code coverage mysql-test/r/varbinary.result: print() code coverage mysql-test/r/variables.result: print() code coverage mysql-test/t/auto_increment.test: print() code coverage mysql-test/t/bench_count_distinct.test: print() code coverage mysql-test/t/case.test: print() code coverage mysql-test/t/cast.test: print() code coverage mysql-test/t/ctype_collate.test: print() code coverage mysql-test/t/ctype_many.test: convert with 3 arguments code covarage print() code coverage mysql-test/t/ctype_utf8.test: char_length code coverage mysql-test/t/date_formats.test: print() code coverage mysql-test/t/fulltext.test: print() code coverage mysql-test/t/func_compress.test: print() code coverage mysql-test/t/func_gconcat.test: print() code coverage mysql-test/t/func_group.test: bit_xor() code coverage print() code coverage mysql-test/t/func_if.test: nullif() code coverage print() code coverage mysql-test/t/func_in.test: print() code coverage mysql-test/t/func_math.test: print() code coverage mysql-test/t/func_op.test: print() code coverage mysql-test/t/func_regexp.test: print() code coverage mysql-test/t/func_set.test: print() code coverage mysql-test/t/func_str.test: crc32() code covarage print() code coverage mysql-test/t/func_system.test: print() code coverage mysql-test/t/func_test.test: print() code coverage mysql-test/t/func_time.test: print() code coverage mysql-test/t/group_by.test: print() code coverage mysql-test/t/having.test: print() code coverage mysql-test/t/insert_update.test: print() code coverage mysql-test/t/null.test: print() code coverage mysql-test/t/olap.test: print() code coverage mysql-test/t/query_cache.test: print() code coverage mysql-test/t/row.test: print() code coverage mysql-test/t/rpl000001.test: print() code coverage mysql-test/t/rpl_get_lock.test: print() code coverage mysql-test/t/rpl_master_pos_wait.test: print() code coverage mysql-test/t/select.test: print() code coverage mysql-test/t/type_blob.test: print() code coverage mysql-test/t/varbinary.test: print() code coverage mysql-test/t/variables.test: print() code coverage sql/item.cc: added string length for more speed layout fix fixed string printability sql/item.h: added string length for more speed sql/item_cmpfunc.cc: added string length for more speed sql/item_cmpfunc.h: fixed printability sql/item_create.cc: fixed printability sql/item_func.cc: fixed printability added string length for more speed sql/item_func.h: fixed printability sql/item_strfunc.cc: fixed printability added string length for more speed sql/item_strfunc.h: fixed printability sql/item_subselect.cc: added string length for more speed sql/item_sum.cc: added string length for more speed sql/item_timefunc.cc: added string length for more speed sql/item_timefunc.h: fixed printability sql/item_uniq.h: added string length for more speed sql/key.cc: added string length for more speed sql/sql_lex.cc: added string length for more speed sql/sql_parse.cc: after merge fix sql/sql_repl.cc: string changed with character for more speed sql/sql_select.cc: added string length for more speed sql/sql_show.cc: added string length for more speed
144 lines
6.7 KiB
Text
144 lines
6.7 KiB
Text
drop table if exists t1;
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select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
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NULL NULL isnull(null) isnull(1/0) isnull(1/0 = null) ifnull(null,1) ifnull(null,"TRUE") ifnull("TRUE","ERROR") 1/0 is null 1 is not null
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NULL NULL 1 1 1 1 TRUE TRUE 1 1
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explain extended select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select high_priority NULL AS `NULL`,NULL AS `NULL`,isnull(NULL) AS `isnull(null)`,isnull((1 / 0)) AS `isnull(1/0)`,isnull(((1 / 0) = NULL)) AS `isnull(1/0 = null)`,ifnull(NULL,1) AS `ifnull(null,1)`,ifnull(NULL,_latin1'TRUE') AS `ifnull(null,"TRUE")`,ifnull(_latin1'TRUE',_latin1'ERROR') AS `ifnull("TRUE","ERROR")`,isnull((1 / 0)) AS `1/0 is null`,(1 is not null) AS `1 is not null`
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select 1 | NULL,1 & NULL,1+NULL,1-NULL;
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1 | NULL 1 & NULL 1+NULL 1-NULL
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NULL NULL NULL NULL
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select NULL=NULL,NULL<>NULL,IFNULL(NULL,1.1)+0,IFNULL(NULL,1) | 0;
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NULL=NULL NULL<>NULL IFNULL(NULL,1.1)+0 IFNULL(NULL,1) | 0
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NULL NULL 1.1 1
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select strcmp("a",NULL),(1<NULL)+0.0,NULL regexp "a",null like "a%","a%" like null;
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strcmp("a",NULL) (1<NULL)+0.0 NULL regexp "a" null like "a%" "a%" like null
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NULL NULL NULL NULL NULL
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select concat("a",NULL),replace(NULL,"a","b"),replace("string","i",NULL),replace("string",NULL,"i"),insert("abc",1,1,NULL),left(NULL,1);
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concat("a",NULL) replace(NULL,"a","b") replace("string","i",NULL) replace("string",NULL,"i") insert("abc",1,1,NULL) left(NULL,1)
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NULL NULL NULL NULL NULL NULL
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select repeat("a",0),repeat("ab",5+5),repeat("ab",-1),reverse(NULL);
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repeat("a",0) repeat("ab",5+5) repeat("ab",-1) reverse(NULL)
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abababababababababab NULL
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select field(NULL,"a","b","c");
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field(NULL,"a","b","c")
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0
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select 2 between null and 1,2 between 3 AND NULL,NULL between 1 and 2,2 between NULL and 3, 2 between 1 AND null;
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2 between null and 1 2 between 3 AND NULL NULL between 1 and 2 2 between NULL and 3 2 between 1 AND null
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0 0 NULL NULL NULL
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explain extended select 2 between null and 1,2 between 3 AND NULL,NULL between 1 and 2,2 between NULL and 3, 2 between 1 AND null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select high_priority (2 between NULL and 1) AS `2 between null and 1`,(2 between 3 and NULL) AS `2 between 3 AND NULL`,(NULL between 1 and 2) AS `NULL between 1 and 2`,(2 between NULL and 3) AS `2 between NULL and 3`,(2 between 1 and NULL) AS `2 between 1 AND null`
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SELECT NULL AND NULL, 1 AND NULL, NULL AND 1, NULL OR NULL, 0 OR NULL, NULL OR 0;
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NULL AND NULL 1 AND NULL NULL AND 1 NULL OR NULL 0 OR NULL NULL OR 0
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NULL NULL NULL NULL NULL NULL
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SELECT (NULL OR NULL) IS NULL;
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(NULL OR NULL) IS NULL
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1
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select NULL AND 0, 0 and NULL;
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NULL AND 0 0 and NULL
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0 0
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select inet_ntoa(null),inet_aton(null),inet_aton("122.256"),inet_aton("122.226."),inet_aton("");
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inet_ntoa(null) inet_aton(null) inet_aton("122.256") inet_aton("122.226.") inet_aton("")
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NULL NULL NULL NULL NULL
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explain extended select inet_ntoa(null),inet_aton(null),inet_aton("122.256"),inet_aton("122.226."),inet_aton("");
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select high_priority inet_ntoa(NULL) AS `inet_ntoa(null)`,inet_aton(NULL) AS `inet_aton(null)`,inet_aton(_latin1'122.256') AS `inet_aton("122.256")`,inet_aton(_latin1'122.226.') AS `inet_aton("122.226.")`,inet_aton(_latin1'') AS `inet_aton("")`
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create table t1 (x int);
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insert into t1 values (null);
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select * from t1 where x != 0;
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x
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drop table t1;
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CREATE TABLE t1 (
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indexed_field int default NULL,
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KEY indexed_field (indexed_field)
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);
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INSERT INTO t1 VALUES (NULL),(NULL);
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SELECT * FROM t1 WHERE indexed_field=NULL;
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indexed_field
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SELECT * FROM t1 WHERE indexed_field IS NULL;
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indexed_field
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NULL
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NULL
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SELECT * FROM t1 WHERE indexed_field<=>NULL;
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indexed_field
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NULL
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NULL
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DROP TABLE t1;
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create table t1 (a int, b int) type=myisam;
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insert into t1 values(20,null);
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a;
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b ifnull(t2.b,"this is null")
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NULL this is null
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a order by 1;
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b ifnull(t2.b,"this is null")
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NULL this is null
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insert into t1 values(10,null);
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a order by 1;
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b ifnull(t2.b,"this is null")
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NULL this is null
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NULL this is null
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drop table t1;
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CREATE TABLE t1 (a varchar(16) NOT NULL, b smallint(6) NOT NULL, c datetime NOT NULL, d smallint(6) NOT NULL);
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INSERT INTO t1 SET a = "", d= "2003-01-14 03:54:55";
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Warnings:
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Warning 1264 Data truncated for column 'd' at row 1
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UPDATE t1 SET d=1/NULL;
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Warnings:
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Warning 1264 Data truncated for column 'd' at row 1
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UPDATE t1 SET d=NULL;
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Warnings:
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'd' at row 1
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INSERT INTO t1 (a) values (null);
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ERROR 23000: Column 'a' cannot be null
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INSERT INTO t1 (a) values (1/null);
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ERROR 23000: Column 'a' cannot be null
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INSERT INTO t1 (a) values (null),(null);
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Warnings:
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'a' at row 1
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'a' at row 2
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INSERT INTO t1 (b) values (null);
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ERROR 23000: Column 'b' cannot be null
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INSERT INTO t1 (b) values (1/null);
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ERROR 23000: Column 'b' cannot be null
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INSERT INTO t1 (b) values (null),(null);
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Warnings:
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'b' at row 1
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'b' at row 2
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INSERT INTO t1 (c) values (null);
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ERROR 23000: Column 'c' cannot be null
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INSERT INTO t1 (c) values (1/null);
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ERROR 23000: Column 'c' cannot be null
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INSERT INTO t1 (c) values (null),(null);
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Warnings:
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'c' at row 1
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'c' at row 2
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INSERT INTO t1 (d) values (null);
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ERROR 23000: Column 'd' cannot be null
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INSERT INTO t1 (d) values (1/null);
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ERROR 23000: Column 'd' cannot be null
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INSERT INTO t1 (d) values (null),(null);
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Warnings:
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'd' at row 1
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Warning 1262 Data truncated, NULL supplied to NOT NULL column 'd' at row 2
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select * from t1;
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a b c d
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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0 0000-00-00 00:00:00 0
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drop table t1;
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