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mariadb/mysql-test/t/null.test
Alexander Barkov 791374354c MDEV-9217 Split Item::tmp_table_field_from_field_type() into virtual methods in Type_handler 
- Adding Type_handler::make_table_field() and moving pieces of the code
  from Item::tmp_table_field_from_field_type() to virtual implementations
  for various type handlers.

- Adding a new Type_all_attributes, to access to Item's extended
  attributes, such as decimal_precision() and geometry_type().

- Adding a new class Record_addr, to pass record related information
  to Type_handler methods (ptr, null_ptr and null_bit) as a single structure.
  Note, later it will possibly be extended for BIT-alike field purposes,
  by adding new members (bit_ptr_arg, bit_ofs_arg).

- Moving the code from Field_new_decimal::create_from_item()
  to Type_handler_newdecimal::make_table_field().

- Removing Field_new_decimal() and Field_geom() helper constructor
  variants that were used for temporary field creation.

- Adding Item_field::type_handler(), Field::type_handler() and
  Field_blob::type_handler() to return correct type handlers for
  blob variants, according to Field_blob::packlength.

- Adding Type_handler_blob_common, as a common parent for
  Type_handler_tiny_blob, Type_handler_blob, Type_handler_medium_blob
  and Type_handler_long_blob.

- Implementing Type_handler_blob_common::Item_hybrid_func_fix_attributes().

  It's needed for cases when TEXT variants of different character sets are mixed
  in LEAST, GREATEST, CASE and its abreviations (IF, IFNULL, COALESCE), e.g.:
      CREATE TABLE t1 (
        a TINYTEXT CHARACTER SET latin1,
        b TINYTEXT CHARACTER SET utf8
      );
      CREATE TABLE t2 AS SELECT COALESCE(a,b) FROM t1;
  Type handler aggregation returns TINYTEXT as a common data type
  for the two columns. But as conversion from latin1 to utf8
  happens for "a", the maximum possible length of "a" grows from 255 to 255*3.
  Type_handler_blob_common::Item_hybrid_func_fix_attributes() makes sure
  to update the blob type handler according to max_length.

- Adding Type_handler::blob_type_handler(uint max_octet_length).

- Adding a few m_type_aggregator_for_result.add() pairs, because
  now Item_xxx::type_handler() can return pointers to type_handler_tiny_blob,
  type_handler_blob, type_handler_medium_blob, type_handler_long_blob.
  Before the patch only type_handler_blob was possible result of type_handler().

- Making type_handler_tiny_blob, type_handler_blob, type_handler_medium_blob,
  type_handler_long_blob public.

- Removing the condition in Item_sum_avg::create_tmp_field()
  checking Item_sum_avg::result_type() against DECIMAL_RESULT.
  Now both REAL_RESULT and DECIMAL_RESULT are symmetrically handled
  by tmp_table_field_from_field_type().

- Removing Item_geometry_func::create_field_for_create_select(),
  as the inherited version perfectly works.

- Fixing Item_func_as_wkb::field_type() to return MYSQL_TYPE_LONG_BLOB
  rather than MYSQL_TYPE_BLOB. It's needed to make sure that
  tmp_table_field_from_field_type() creates a LONGBLOB field for AsWKB().

- Fixing Item_func_as_wkt::fix_length_and_dec() to set max_length to
  UINT32_MAX rather than MAX_BLOB_WIDTH, to make sure that
  tmp_table_field_from_field_type() creates a LONGTEXT field for AsWKT().

- Removing Item_func_set_user_var::create_field_for_create_select(),
  as the inherited version works fine.

- Adding Item_func_get_user_var::create_field_for_create_select() to
  make sure that "CREATE TABLE t1 AS SELECT @string_user variable"
  always creates a field of LONGTEXT/LONGBLOB type.

- Item_func_ifnull::create_field_for_create_select()
  behavior has changed. Before the patch it passed set_blob_packflag=false,
  which meant to create LONGBLOB for all blob variants.
  Now it takes into account max_length, which gives better column
  data types for:
    CREATE TABLE t2 AS SELECT IFNULL(blob_column1, blob_column2) FROM t1;

- Fixing Item_func_nullif::fix_length_and_dec() to use
  set_handler(args[2]->type_handler()) instead of
  set_handler_by_field_type(args[2]->field_type()).
  This is needed to distinguish between BLOB variants.

- Implementing Item_blob::type_handler(), to make sure to create
  proper BLOB field variant, according to max_length, for queries like:
    CREATE TABLE t1 AS
      SELECT some_blob_field FROM INFORMATION_SCHEMA.SOME_TABLE;

- Fixing Item_field::real_type_handler() to make sure that
  the code aggregating fields for UNION gets a proper BLOB
  variant type handler from fields.

- Adding a special code into Item_type_holder::make_field_by_type(),
  to make sure that after aggregating field types it also properly
  takes into account max_length when mixing TEXT variants of different
  character sets and chooses a proper TEXT variant:
      CREATE TABLE t1 (
        a TINYTEXT CHARACTER SET latin1,
        b TINYTEXT CHARACTER SET utf8
      );
      CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT b FROM t1;

- Adding tests, for better coverage of IFNULL, NULLIF, UNION.

- The fact that tmp_table_field_from_field_type() now takes
  into account BLOB variants (instead of always creating LONGBLOB),
  tests results for WEIGHT_STRING() and NULLIF() and UNION
  have become more precise.
2017-04-24 12:09:25 +04:00

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# Initialise
--disable_warnings
drop table if exists t1, t2;
--enable_warnings
#
# Testing of NULL in a lot of different places
#
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;
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;
select 1 | NULL,1 & NULL,1+NULL,1-NULL;
select NULL=NULL,NULL<>NULL,IFNULL(NULL,1.1)+0,IFNULL(NULL,1) | 0;
select strcmp("a",NULL),(1<NULL)+0.0,NULL regexp "a",null like "a%","a%" like null;
select concat("a",NULL),replace(NULL,"a","b"),replace("string","i",NULL),replace("string",NULL,"i"),insert("abc",1,1,NULL),left(NULL,1);
select repeat("a",0),repeat("ab",5+5),repeat("ab",-1),reverse(NULL);
select field(NULL,"a","b","c");
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;
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;
SELECT NULL AND NULL, 1 AND NULL, NULL AND 1, NULL OR NULL, 0 OR NULL, NULL OR 0;
SELECT (NULL OR NULL) IS NULL;
select NULL AND 0, 0 and NULL;
select inet_ntoa(null),inet_aton(null),inet_aton("122.256"),inet_aton("122.226."),inet_aton("");
explain extended select inet_ntoa(null),inet_aton(null),inet_aton("122.256"),inet_aton("122.226."),inet_aton("");
select not null is true, not null or true, not null and false, not null <=> null;
create table t1 (x int);
insert into t1 values (null);
select * from t1 where x != 0;
drop table t1;
#
# Test problem med index on NULL columns and testing with =NULL;
#
CREATE TABLE t1 (
indexed_field int default NULL,
KEY indexed_field (indexed_field)
);
INSERT INTO t1 VALUES (NULL),(NULL);
SELECT * FROM t1 WHERE indexed_field=NULL;
SELECT * FROM t1 WHERE indexed_field IS NULL;
SELECT * FROM t1 WHERE indexed_field<=>NULL;
DROP TABLE t1;
#
# Testing of IFNULL
#
create table t1 (a int, b int) engine=myisam;
insert into t1 values(20,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a;
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
insert into t1 values(10,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
drop table t1;
#
# Test inserting and updating with NULL
#
CREATE TABLE t1 (a varchar(16) NOT NULL default '', b smallint(6) NOT NULL default 0, c datetime NOT NULL default '0000-00-00 00:00:00', d smallint(6) NOT NULL default 0);
INSERT IGNORE INTO t1 SET a = "", d= "2003-01-14 03:54:55";
UPDATE IGNORE t1 SET d=1/NULL;
UPDATE IGNORE t1 SET d=NULL;
--error 1048
INSERT INTO t1 (a) values (null);
--error 1048
INSERT INTO t1 (a) values (1/null);
INSERT IGNORE INTO t1 (a) values (null),(null);
--error 1048
INSERT INTO t1 (b) values (null);
--error 1048
INSERT INTO t1 (b) values (1/null);
INSERT IGNORE INTO t1 (b) values (null),(null);
--error 1048
INSERT INTO t1 (c) values (null);
--error 1048
INSERT INTO t1 (c) values (1/null);
INSERT IGNORE INTO t1 (c) values (null),(null);
--error 1048
INSERT INTO t1 (d) values (null);
--error 1048
INSERT INTO t1 (d) values (1/null);
INSERT IGNORE INTO t1 (d) values (null),(null);
select * from t1;
drop table t1;
#
# Test to check elimination of IS NULL predicate for a non-nullable attribute
# (bug #1990)
#
create table t1 (a int not null, b int not null, index idx(a));
insert into t1 values
(1,1), (2,2), (3,3), (4,4), (5,5), (6,6),
(7,7), (8,8), (9,9), (10,10), (11,11), (12,12);
explain select * from t1 where a between 2 and 3;
explain select * from t1 where a between 2 and 3 or b is null;
drop table t1;
select cast(NULL as signed);
#
# IS NULL is unable to use index in range if column is declared not null
# (Bug #4256)
#
create table t1(i int, key(i));
insert into t1 values(1);
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 select i*2 from t1;
insert into t1 values(null);
explain select * from t1 where i=2 or i is null;
select count(*) from t1 where i=2 or i is null;
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
alter table t1 change i i int not null;
explain select * from t1 where i=2 or i is null;
select count(*) from t1 where i=2 or i is null;
drop table t1;
#
# NULL has its own type BINARY(0) by default.
# But NULL should be weaker than a constant
# when mixing charsets/collations
#
set names latin2;
# Check that result type is taken from a non-null string
create table t1 select
null as c00,
if(1, null, 'string') as c01,
if(0, null, 'string') as c02,
ifnull(null, 'string') as c03,
ifnull('string', null) as c04,
case when 0 then null else 'string' end as c05,
case when 1 then null else 'string' end as c06,
coalesce(null, 'string') as c07,
coalesce('string', null) as c08,
least('string',null) as c09,
least(null, 'string') as c10,
greatest('string',null) as c11,
greatest(null, 'string') as c12,
nullif('string', null) as c13,
nullif(null, 'string') as c14,
trim('string' from null) as c15,
trim(null from 'string') as c16,
substring_index('string', null, 1) as c17,
substring_index(null, 'string', 1) as c18,
elt(1, null, 'string') as c19,
elt(1, 'string', null) as c20,
concat('string', null) as c21,
concat(null, 'string') as c22,
concat_ws('sep', 'string', null) as c23,
concat_ws('sep', null, 'string') as c24,
concat_ws(null, 'string', 'string') as c25,
make_set(3, 'string', null) as c26,
make_set(3, null, 'string') as c27,
export_set(3, null, 'off', 'sep') as c29,
export_set(3, 'on', null, 'sep') as c30,
export_set(3, 'on', 'off', null) as c31,
replace(null, 'from', 'to') as c32,
replace('str', null, 'to') as c33,
replace('str', 'from', null) as c34,
insert('str', 1, 2, null) as c35,
insert(null, 1, 2, 'str') as c36,
lpad('str', 10, null) as c37,
rpad(null, 10, 'str') as c38;
show create table t1;
drop table t1;
#
# Check that comparison is done according to
# non-null string collation, i.e. case insensitively,
# rather than according to NULL's collation, i.e. case sensitively
#
# in field
select
case 'str' when 'STR' then 'str' when null then 'null' end as c01,
case 'str' when null then 'null' when 'STR' then 'str' end as c02,
field(null, 'str1', 'str2') as c03,
field('str1','STR1', null) as c04,
field('str1', null, 'STR1') as c05,
'string' in ('STRING', null) as c08,
'string' in (null, 'STRING') as c09;
# Restore charset to the default value.
set names latin1;
#
# Bug#19145: mysqld crashes if you set the default value of an enum field to NULL
#
create table bug19145a (e enum('a','b','c') default 'b' , s set('x', 'y', 'z') default 'y' ) engine=MyISAM;
create table bug19145b (e enum('a','b','c') default null, s set('x', 'y', 'z') default null) engine=MyISAM;
create table bug19145c (e enum('a','b','c') not null default 'b' , s set('x', 'y', 'z') not null default 'y' ) engine=MyISAM;
# Invalid default value for 's'
--error 1067
create table bug19145setnotnulldefaultnull (e enum('a','b','c') default null, s set('x', 'y', 'z') not null default null) engine=MyISAM;
# Invalid default value for 'e'
--error 1067
create table bug19145enumnotnulldefaultnull (e enum('a','b','c') not null default null, s set('x', 'y', 'z') default null) engine=MyISAM;
alter table bug19145a alter column e set default null;
alter table bug19145a alter column s set default null;
alter table bug19145a add column (i int);
alter table bug19145b alter column e set default null;
alter table bug19145b alter column s set default null;
alter table bug19145b add column (i int);
# Invalid default value for 'e'
--error 1067
alter table bug19145c alter column e set default null;
# Invalid default value for 's'
--error 1067
alter table bug19145c alter column s set default null;
alter table bug19145c add column (i int);
show create table bug19145a;
show create table bug19145b;
show create table bug19145c;
drop table bug19145a;
drop table bug19145b;
drop table bug19145c;
--echo # End of 4.1 tests
--echo #
--echo # Bug #31471: decimal_bin_size: Assertion `scale >= 0 &&
--echo # precision > 0 && scale <= precision'
--echo #
CREATE TABLE t1 (a DECIMAL (1, 0) ZEROFILL, b DECIMAL (1, 0) ZEROFILL);
INSERT INTO t1 (a, b) VALUES (0, 0);
CREATE TABLE t2 SELECT IFNULL(a, b) FROM t1;
DESCRIBE t2;
DROP TABLE t2;
CREATE TABLE t2 SELECT IFNULL(a, NULL) FROM t1;
DESCRIBE t2;
DROP TABLE t2;
CREATE TABLE t2 SELECT IFNULL(NULL, b) FROM t1;
DESCRIBE t2;
DROP TABLE t1, t2;
--echo # End of 5.0 tests
--echo #
--echo # MDEV-4895 Valgrind warnings (Conditional jump or move depends on uninitialised value) in Field_datetime::get_date on GREATEST(..) IS NULL
--echo #
CREATE TABLE t1 (dt DATETIME NOT NULL);
INSERT INTO t1 VALUES (NOW()),(NOW());
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
DROP TABLE t1;
--echo #
--echo # Bug mdev-5132: crash when exeicuting a join query
--echo # with IS NULL and IS NOT NULL in where
--echo #
CREATE TABLE t1 (a DATE, b INT, c INT, KEY(a), KEY(b), KEY(c)) ENGINE=MyISAM;
CREATE TABLE t2 (d DATE) ENGINE=MyISAM;
SELECT * FROM t1,t2 WHERE 1 IS NOT NULL AND t1.b IS NULL;
DROP TABLE t1,t2;
--echo #
--echo # Start of 10.0 tests
--echo #
--echo #
--echo # MDEV-7001 Bad result for NOT NOT STRCMP('a','b') and NOT NOT NULLIF(2,3)
--echo #
SELECT NOT NOT NULLIF(2,3);
--echo #
--echo # End of 10.0 tests
--echo #
--echo #
--echo # Start of 10.1 tests
--echo #
--echo #
--echo # MDEV-7146 NULLIF returns unexpected result with a YEAR field
--echo #
CREATE TABLE t1 (a YEAR(2));
INSERT INTO t1 VALUES (0);
SELECT a,NULLIF(a,2000),NULLIF(2000,a) FROM t1;
SELECT a,NULLIF(a,2001),NULLIF(2001,a) FROM t1;
DROP TABLE t1;
--echo #
--echo # MDEV-7005 NULLIF does not work as documented
--echo #
CREATE TABLE t1 (a TIME);
CREATE TABLE t2 AS SELECT a,NULLIF(a,a), CASE WHEN a=a THEN NULL ELSE a END FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t1,t2;
--error ER_CANT_AGGREGATE_2COLLATIONS
SELECT NULLIF(_latin1'a' COLLATE latin1_general_ci, _latin1'a' COLLATE latin1_bin);
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(1,1),
NULLIF(1,1.0),
NULLIF(1,1e0),
NULLIF(1,'2001-01-01'),
NULLIF(1,TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(1.0,1),
NULLIF(1.0,1.0),
NULLIF(1.0,1e0),
NULLIF(1.0,'2001-01-01'),
NULLIF(1.0,TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(1e0,1),
NULLIF(1e0,1.0),
NULLIF(1e0,1e0),
NULLIF(1e0,'2001-01-01'),
NULLIF(1e0,TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT
NULLIF('1',1),
NULLIF('1',1.0),
NULLIF('1',1e0),
NULLIF('1','2001-01-01'),
NULLIF('1',TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(TIMESTAMP'2001-01-01 00:00:00',1),
NULLIF(TIMESTAMP'2001-01-01 00:00:00',1.0),
NULLIF(TIMESTAMP'2001-01-01 00:00:00',1e0),
NULLIF(TIMESTAMP'2001-01-01 00:00:00','2001-01-01'),
NULLIF(TIMESTAMP'2001-01-01 00:00:00',TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(DATE'2001-01-01',1),
NULLIF(DATE'2001-01-01',1.0),
NULLIF(DATE'2001-01-01',1e0),
NULLIF(DATE'2001-01-01','2001-01-01'),
NULLIF(DATE'2001-01-01',TIME'00:00:00');
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT
NULLIF(TIME'00:00:01',1),
NULLIF(TIME'00:00:01',1.0),
NULLIF(TIME'00:00:01',1e0),
NULLIF(TIME'00:00:01','00:00:00'),
NULLIF(TIME'00:00:01',DATE'2001-01-01');
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1
(
c_tinyint TINYINT,
c_smallint SMALLINT,
c_int INT,
c_bigint BIGINT,
c_float FLOAT,
c_double DOUBLE,
c_decimal103 DECIMAL(10,3),
c_varchar10 VARCHAR(10),
c_tinytext TINYTEXT,
c_text TEXT,
c_mediumtext MEDIUMTEXT,
c_longtext LONGTEXT,
c_tinyblob TINYBLOB,
c_blob BLOB,
c_mediumblob MEDIUMBLOB,
c_longblob LONGBLOB,
c_enum ENUM('one','two','tree'),
c_datetime3 DATETIME(3),
c_timestamp3 TIMESTAMP(3),
c_date DATE,
c_time TIME
);
--echo #
--echo # Checking that the return type depends only on args[0], even when compared to a super type
--echo #
CREATE TABLE t2 AS SELECT
NULLIF(c_tinyint, 1),
NULLIF(c_tinyint, c_smallint),
NULLIF(c_tinyint, c_tinyint),
NULLIF(c_tinyint, c_int),
NULLIF(c_tinyint, c_bigint),
NULLIF(c_tinyint, c_float),
NULLIF(c_tinyint, c_double),
NULLIF(c_tinyint, c_decimal103),
NULLIF(c_tinyint, c_varchar10),
NULLIF(c_tinyint, c_text),
NULLIF(c_tinyint, c_blob),
NULLIF(c_tinyint, c_enum),
NULLIF(c_tinyint, c_datetime3),
NULLIF(c_tinyint, c_timestamp3),
NULLIF(c_tinyint, c_date),
NULLIF(c_tinyint, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_smallint, 1),
NULLIF(c_smallint, c_smallint),
NULLIF(c_smallint, c_tinyint),
NULLIF(c_smallint, c_int),
NULLIF(c_smallint, c_bigint),
NULLIF(c_smallint, c_float),
NULLIF(c_smallint, c_double),
NULLIF(c_smallint, c_decimal103),
NULLIF(c_smallint, c_varchar10),
NULLIF(c_smallint, c_text),
NULLIF(c_smallint, c_blob),
NULLIF(c_smallint, c_enum),
NULLIF(c_smallint, c_datetime3),
NULLIF(c_smallint, c_timestamp3),
NULLIF(c_smallint, c_date),
NULLIF(c_smallint, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_int, 1),
NULLIF(c_int, c_smallint),
NULLIF(c_int, c_tinyint),
NULLIF(c_int, c_int),
NULLIF(c_int, c_bigint),
NULLIF(c_int, c_float),
NULLIF(c_int, c_double),
NULLIF(c_int, c_decimal103),
NULLIF(c_int, c_varchar10),
NULLIF(c_int, c_text),
NULLIF(c_int, c_blob),
NULLIF(c_int, c_enum),
NULLIF(c_int, c_datetime3),
NULLIF(c_int, c_timestamp3),
NULLIF(c_int, c_date),
NULLIF(c_int, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_bigint, 1),
NULLIF(c_bigint, c_smallint),
NULLIF(c_bigint, c_tinyint),
NULLIF(c_bigint, c_int),
NULLIF(c_bigint, c_bigint),
NULLIF(c_bigint, c_float),
NULLIF(c_bigint, c_double),
NULLIF(c_bigint, c_decimal103),
NULLIF(c_bigint, c_varchar10),
NULLIF(c_bigint, c_text),
NULLIF(c_bigint, c_blob),
NULLIF(c_bigint, c_enum),
NULLIF(c_bigint, c_datetime3),
NULLIF(c_bigint, c_timestamp3),
NULLIF(c_bigint, c_date),
NULLIF(c_bigint, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
# QQ: this should probably create a FLOAT column instead of a DOUBLE column
CREATE TABLE t2 AS SELECT
NULLIF(c_float, 1),
NULLIF(c_float, c_smallint),
NULLIF(c_float, c_tinyint),
NULLIF(c_float, c_int),
NULLIF(c_float, c_bigint),
NULLIF(c_float, c_float),
NULLIF(c_float, c_double),
NULLIF(c_float, c_decimal103),
NULLIF(c_float, c_varchar10),
NULLIF(c_float, c_text),
NULLIF(c_float, c_blob),
NULLIF(c_float, c_enum),
NULLIF(c_float, c_datetime3),
NULLIF(c_float, c_timestamp3),
NULLIF(c_float, c_date),
NULLIF(c_float, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_double, 1),
NULLIF(c_double, c_smallint),
NULLIF(c_double, c_tinyint),
NULLIF(c_double, c_int),
NULLIF(c_double, c_bigint),
NULLIF(c_double, c_float),
NULLIF(c_double, c_double),
NULLIF(c_double, c_decimal103),
NULLIF(c_double, c_varchar10),
NULLIF(c_double, c_text),
NULLIF(c_double, c_blob),
NULLIF(c_double, c_enum),
NULLIF(c_double, c_datetime3),
NULLIF(c_double, c_timestamp3),
NULLIF(c_double, c_date),
NULLIF(c_double, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_decimal103, 1),
NULLIF(c_decimal103, c_smallint),
NULLIF(c_decimal103, c_tinyint),
NULLIF(c_decimal103, c_int),
NULLIF(c_decimal103, c_bigint),
NULLIF(c_decimal103, c_float),
NULLIF(c_decimal103, c_double),
NULLIF(c_decimal103, c_decimal103),
NULLIF(c_decimal103, c_varchar10),
NULLIF(c_decimal103, c_text),
NULLIF(c_decimal103, c_blob),
NULLIF(c_decimal103, c_enum),
NULLIF(c_decimal103, c_datetime3),
NULLIF(c_decimal103, c_timestamp3),
NULLIF(c_decimal103, c_date),
NULLIF(c_decimal103, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_varchar10, 1),
NULLIF(c_varchar10, c_smallint),
NULLIF(c_varchar10, c_tinyint),
NULLIF(c_varchar10, c_int),
NULLIF(c_varchar10, c_bigint),
NULLIF(c_varchar10, c_float),
NULLIF(c_varchar10, c_double),
NULLIF(c_varchar10, c_decimal103),
NULLIF(c_varchar10, c_varchar10),
NULLIF(c_varchar10, c_text),
NULLIF(c_varchar10, c_blob),
NULLIF(c_varchar10, c_enum),
NULLIF(c_varchar10, c_datetime3),
NULLIF(c_varchar10, c_timestamp3),
NULLIF(c_varchar10, c_date),
NULLIF(c_varchar10, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_tinytext, 1),
NULLIF(c_tinytext, c_smallint),
NULLIF(c_tinytext, c_tinyint),
NULLIF(c_tinytext, c_int),
NULLIF(c_tinytext, c_bigint),
NULLIF(c_tinytext, c_float),
NULLIF(c_tinytext, c_double),
NULLIF(c_tinytext, c_decimal103),
NULLIF(c_tinytext, c_varchar10),
NULLIF(c_tinytext, c_text),
NULLIF(c_tinytext, c_blob),
NULLIF(c_tinytext, c_enum),
NULLIF(c_tinytext, c_datetime3),
NULLIF(c_tinytext, c_timestamp3),
NULLIF(c_tinytext, c_date),
NULLIF(c_tinytext, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_text, 1),
NULLIF(c_text, c_smallint),
NULLIF(c_text, c_tinyint),
NULLIF(c_text, c_int),
NULLIF(c_text, c_bigint),
NULLIF(c_text, c_float),
NULLIF(c_text, c_double),
NULLIF(c_text, c_decimal103),
NULLIF(c_text, c_varchar10),
NULLIF(c_text, c_text),
NULLIF(c_text, c_blob),
NULLIF(c_text, c_enum),
NULLIF(c_text, c_datetime3),
NULLIF(c_text, c_timestamp3),
NULLIF(c_text, c_date),
NULLIF(c_text, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_mediumtext, 1),
NULLIF(c_mediumtext, c_smallint),
NULLIF(c_mediumtext, c_tinyint),
NULLIF(c_mediumtext, c_int),
NULLIF(c_mediumtext, c_bigint),
NULLIF(c_mediumtext, c_float),
NULLIF(c_mediumtext, c_double),
NULLIF(c_mediumtext, c_decimal103),
NULLIF(c_mediumtext, c_varchar10),
NULLIF(c_mediumtext, c_text),
NULLIF(c_mediumtext, c_blob),
NULLIF(c_mediumtext, c_enum),
NULLIF(c_mediumtext, c_datetime3),
NULLIF(c_mediumtext, c_timestamp3),
NULLIF(c_mediumtext, c_date),
NULLIF(c_mediumtext, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_longtext, 1),
NULLIF(c_longtext, c_smallint),
NULLIF(c_longtext, c_tinyint),
NULLIF(c_longtext, c_int),
NULLIF(c_longtext, c_bigint),
NULLIF(c_longtext, c_float),
NULLIF(c_longtext, c_double),
NULLIF(c_longtext, c_decimal103),
NULLIF(c_longtext, c_varchar10),
NULLIF(c_longtext, c_text),
NULLIF(c_longtext, c_blob),
NULLIF(c_longtext, c_enum),
NULLIF(c_longtext, c_datetime3),
NULLIF(c_longtext, c_timestamp3),
NULLIF(c_longtext, c_date),
NULLIF(c_longtext, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_tinyblob, 1),
NULLIF(c_tinyblob, c_smallint),
NULLIF(c_tinyblob, c_tinyint),
NULLIF(c_tinyblob, c_int),
NULLIF(c_tinyblob, c_bigint),
NULLIF(c_tinyblob, c_float),
NULLIF(c_tinyblob, c_double),
NULLIF(c_tinyblob, c_decimal103),
NULLIF(c_tinyblob, c_varchar10),
NULLIF(c_tinyblob, c_text),
NULLIF(c_tinyblob, c_blob),
NULLIF(c_tinyblob, c_enum),
NULLIF(c_tinyblob, c_datetime3),
NULLIF(c_tinyblob, c_timestamp3),
NULLIF(c_tinyblob, c_date),
NULLIF(c_tinyblob, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_blob, 1),
NULLIF(c_blob, c_smallint),
NULLIF(c_blob, c_tinyint),
NULLIF(c_blob, c_int),
NULLIF(c_blob, c_bigint),
NULLIF(c_blob, c_float),
NULLIF(c_blob, c_double),
NULLIF(c_blob, c_decimal103),
NULLIF(c_blob, c_varchar10),
NULLIF(c_blob, c_text),
NULLIF(c_blob, c_blob),
NULLIF(c_blob, c_enum),
NULLIF(c_blob, c_datetime3),
NULLIF(c_blob, c_timestamp3),
NULLIF(c_blob, c_date),
NULLIF(c_blob, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_mediumblob, 1),
NULLIF(c_mediumblob, c_smallint),
NULLIF(c_mediumblob, c_tinyint),
NULLIF(c_mediumblob, c_int),
NULLIF(c_mediumblob, c_bigint),
NULLIF(c_mediumblob, c_float),
NULLIF(c_mediumblob, c_double),
NULLIF(c_mediumblob, c_decimal103),
NULLIF(c_mediumblob, c_varchar10),
NULLIF(c_mediumblob, c_text),
NULLIF(c_mediumblob, c_blob),
NULLIF(c_mediumblob, c_enum),
NULLIF(c_mediumblob, c_datetime3),
NULLIF(c_mediumblob, c_timestamp3),
NULLIF(c_mediumblob, c_date),
NULLIF(c_mediumblob, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_longblob, 1),
NULLIF(c_longblob, c_smallint),
NULLIF(c_longblob, c_tinyint),
NULLIF(c_longblob, c_int),
NULLIF(c_longblob, c_bigint),
NULLIF(c_longblob, c_float),
NULLIF(c_longblob, c_double),
NULLIF(c_longblob, c_decimal103),
NULLIF(c_longblob, c_varchar10),
NULLIF(c_longblob, c_text),
NULLIF(c_longblob, c_blob),
NULLIF(c_longblob, c_enum),
NULLIF(c_longblob, c_datetime3),
NULLIF(c_longblob, c_timestamp3),
NULLIF(c_longblob, c_date),
NULLIF(c_longblob, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
# QQ: this should probably create a ENUM column instead of VARCHAR(4)
CREATE TABLE t2 AS SELECT
NULLIF(c_enum, 1),
NULLIF(c_enum, c_smallint),
NULLIF(c_enum, c_tinyint),
NULLIF(c_enum, c_int),
NULLIF(c_enum, c_bigint),
NULLIF(c_enum, c_float),
NULLIF(c_enum, c_double),
NULLIF(c_enum, c_decimal103),
NULLIF(c_enum, c_varchar10),
NULLIF(c_enum, c_text),
NULLIF(c_enum, c_blob),
NULLIF(c_enum, c_enum),
NULLIF(c_enum, c_datetime3),
NULLIF(c_enum, c_timestamp3),
NULLIF(c_enum, c_date),
NULLIF(c_enum, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_datetime3, 1),
NULLIF(c_datetime3, c_smallint),
NULLIF(c_datetime3, c_tinyint),
NULLIF(c_datetime3, c_int),
NULLIF(c_datetime3, c_bigint),
NULLIF(c_datetime3, c_float),
NULLIF(c_datetime3, c_double),
NULLIF(c_datetime3, c_decimal103),
NULLIF(c_datetime3, c_varchar10),
NULLIF(c_datetime3, c_text),
NULLIF(c_datetime3, c_blob),
NULLIF(c_datetime3, c_enum),
NULLIF(c_datetime3, c_datetime3),
NULLIF(c_datetime3, c_timestamp3),
NULLIF(c_datetime3, c_date),
NULLIF(c_datetime3, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_timestamp3, 1),
NULLIF(c_timestamp3, c_smallint),
NULLIF(c_timestamp3, c_tinyint),
NULLIF(c_timestamp3, c_int),
NULLIF(c_timestamp3, c_bigint),
NULLIF(c_timestamp3, c_float),
NULLIF(c_timestamp3, c_double),
NULLIF(c_timestamp3, c_decimal103),
NULLIF(c_timestamp3, c_varchar10),
NULLIF(c_timestamp3, c_text),
NULLIF(c_timestamp3, c_blob),
NULLIF(c_timestamp3, c_enum),
NULLIF(c_timestamp3, c_datetime3),
NULLIF(c_timestamp3, c_timestamp3),
NULLIF(c_timestamp3, c_date),
NULLIF(c_timestamp3, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_date, 1),
NULLIF(c_date, c_smallint),
NULLIF(c_date, c_tinyint),
NULLIF(c_date, c_int),
NULLIF(c_date, c_bigint),
NULLIF(c_date, c_float),
NULLIF(c_date, c_double),
NULLIF(c_date, c_decimal103),
NULLIF(c_date, c_varchar10),
NULLIF(c_date, c_text),
NULLIF(c_date, c_blob),
NULLIF(c_date, c_enum),
NULLIF(c_date, c_datetime3),
NULLIF(c_date, c_timestamp3),
NULLIF(c_date, c_date),
NULLIF(c_date, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(c_time, 1),
NULLIF(c_time, c_smallint),
NULLIF(c_time, c_tinyint),
NULLIF(c_time, c_int),
NULLIF(c_time, c_bigint),
NULLIF(c_time, c_float),
NULLIF(c_time, c_double),
NULLIF(c_time, c_decimal103),
NULLIF(c_time, c_varchar10),
NULLIF(c_time, c_text),
NULLIF(c_time, c_blob),
NULLIF(c_time, c_enum),
NULLIF(c_time, c_datetime3),
NULLIF(c_time, c_timestamp3),
NULLIF(c_time, c_date),
NULLIF(c_time, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
--echo #
--echo # Checking that the return type depends only on args[0], even if compared to a field
--echo #
CREATE TABLE t2 AS SELECT
NULLIF(1, 1),
NULLIF(1, c_smallint),
NULLIF(1, c_tinyint),
NULLIF(1, c_int),
NULLIF(1, c_bigint),
NULLIF(1, c_float),
NULLIF(1, c_double),
NULLIF(1, c_decimal103),
NULLIF(1, c_varchar10),
NULLIF(1, c_text),
NULLIF(1, c_blob),
NULLIF(1, c_enum),
NULLIF(1, c_datetime3),
NULLIF(1, c_timestamp3),
NULLIF(1, c_date),
NULLIF(1, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(1.0, 1),
NULLIF(1.0, c_smallint),
NULLIF(1.0, c_tinyint),
NULLIF(1.0, c_int),
NULLIF(1.0, c_bigint),
NULLIF(1.0, c_float),
NULLIF(1.0, c_double),
NULLIF(1.0, c_decimal103),
NULLIF(1.0, c_varchar10),
NULLIF(1.0, c_text),
NULLIF(1.0, c_blob),
NULLIF(1.0, c_enum),
NULLIF(1.0, c_datetime3),
NULLIF(1.0, c_timestamp3),
NULLIF(1.0, c_date),
NULLIF(1.0, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(1e0, 1),
NULLIF(1e0, c_smallint),
NULLIF(1e0, c_tinyint),
NULLIF(1e0, c_int),
NULLIF(1e0, c_bigint),
NULLIF(1e0, c_float),
NULLIF(1e0, c_double),
NULLIF(1e0, c_decimal103),
NULLIF(1e0, c_varchar10),
NULLIF(1e0, c_text),
NULLIF(1e0, c_blob),
NULLIF(1e0, c_enum),
NULLIF(1e0, c_datetime3),
NULLIF(1e0, c_timestamp3),
NULLIF(1e0, c_date),
NULLIF(1e0, c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF('1', 1),
NULLIF('1', c_smallint),
NULLIF('1', c_tinyint),
NULLIF('1', c_int),
NULLIF('1', c_bigint),
NULLIF('1', c_float),
NULLIF('1', c_double),
NULLIF('1', c_decimal103),
NULLIF('1', c_varchar10),
NULLIF('1', c_text),
NULLIF('1', c_blob),
NULLIF('1', c_enum),
NULLIF('1', c_datetime3),
NULLIF('1', c_timestamp3),
NULLIF('1', c_date),
NULLIF('1', c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT
NULLIF(TIME'10:10:10', 1),
NULLIF(TIME'10:10:10', c_smallint),
NULLIF(TIME'10:10:10', c_tinyint),
NULLIF(TIME'10:10:10', c_int),
NULLIF(TIME'10:10:10', c_bigint),
NULLIF(TIME'10:10:10', c_float),
NULLIF(TIME'10:10:10', c_double),
NULLIF(TIME'10:10:10', c_decimal103),
NULLIF(TIME'10:10:10', c_varchar10),
NULLIF(TIME'10:10:10', c_text),
NULLIF(TIME'10:10:10', c_blob),
NULLIF(TIME'10:10:10', c_enum),
NULLIF(TIME'10:10:10', c_datetime3),
NULLIF(TIME'10:10:10', c_timestamp3),
NULLIF(TIME'10:10:10', c_date),
NULLIF(TIME'10:10:10', c_time)
FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;
--echo #
--echo # MDEV-7759 NULLIF(x,y) is not equal to CASE WHEN x=y THEN NULL ELSE x END
--echo #
CREATE TABLE t1 (a YEAR);
INSERT INTO t1 VALUES (2010),(2020);
SELECT * FROM t1 WHERE a=2010 AND NULLIF(10.1,a) IS NULL;
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2010 AND NULLIF(10.1,a) IS NULL;
SELECT * FROM t1 WHERE a=2010 AND CASE WHEN 10.1=a THEN NULL ELSE 10.1 END IS NULL;
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2010 AND CASE WHEN 10.1=a THEN NULL ELSE 10.1 END IS NULL;
DROP TABLE t1;
--echo # Two warnings expected
SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
CREATE TABLE t1 AS SELECT
NULLIF(TIMESTAMP'2001-01-01 00:00:00',1) AS a,
CASE WHEN TIMESTAMP'2001-01-01 00:00:00'=1 THEN NULL
ELSE TIMESTAMP'2001-01-01 00:00:00'
END AS b;
DROP TABLE t1;
--echo #
--echo # MDEV-8785 Wrong results for EXPLAIN EXTENDED...WHERE NULLIF(latin1_col, _utf8'a' COLLATE utf8_bin) IS NOT NULL
--echo #
CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1);
INSERT INTO t1 VALUES ('a'),('A');
SELECT a, NULLIF(a,_utf8'a' COLLATE utf8_bin) IS NULL FROM t1;
SELECT CHARSET(NULLIF(a,_utf8'a' COLLATE utf8_bin)) FROM t1;
EXPLAIN EXTENDED SELECT NULLIF(a,_utf8'a' COLLATE utf8_bin) IS NULL AS expr FROM t1;
DROP TABLE t1;
--echo #
--echo # MDEV-8740 Wrong result for SELECT..WHERE year_field=10 AND NULLIF(year_field,2011.1)='2011'
--echo #
CREATE TABLE t1 (a YEAR);
INSERT INTO t1 VALUES (2010),(2011);
SELECT a=10 AND NULLIF(a,2011.1)='2011' AS cond FROM t1;
SELECT * FROM t1 WHERE a=10;
SELECT * FROM t1 WHERE NULLIF(a,2011.1)='2011';
SELECT * FROM t1 WHERE a=10 AND NULLIF(a,2011.1)='2011';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a=10 AND NULLIF(a,2011.1)='2011';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a=10 AND NULLIF(a,2011.1)=CONCAT('2011',RAND());
DROP TABLE t1;
--echo #
--echo # MDEV-8754 Wrong result for SELECT..WHERE year_field=2020 AND NULLIF(year_field,2010)='2020'
--echo #
CREATE TABLE t1 (a YEAR);
INSERT INTO t1 VALUES (2010),(2020);
SELECT * FROM t1 WHERE a=2020;
SELECT * FROM t1 WHERE NULLIF(a,2010)='2020';
SELECT * FROM t1 WHERE a=2020 AND NULLIF(a,2010)='2020';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a=2020 AND NULLIF(a,2010)='2020';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a=2020 AND NULLIF(a,2010)=CONCAT('2020',RAND());
DROP TABLE t1;
--echo #
--echo # MDEV-9181 (NULLIF(count(table.col)), 0) gives wrong result on 10.1.x
--echo #
CREATE TABLE t1 (c1 varchar(50) DEFAULT NULL);
INSERT INTO t1 (c1) VALUES ('hello'), ('hello\r\n'), ('hello'),('hello');
SELECT NULLIF(COUNT(c1),0) FROM t1;
SELECT CASE WHEN COUNT(c1)=0 THEN NULL ELSE COUNT(c1) END FROM t1;
SELECT NULLIF(COUNT(c1)+0,0) AS c1,NULLIF(CAST(COUNT(c1) AS SIGNED),0) AS c2,NULLIF(CONCAT(COUNT(c1)),0) AS c3 FROM t1;
SELECT NULLIF(COUNT(DISTINCT c1),0) FROM t1;
SELECT CASE WHEN COUNT(DISTINCT c1)=0 THEN NULL ELSE COUNT(DISTINCT c1) END FROM t1;
DROP TABLE t1;
CREATE TABLE t1 (
id INT NOT NULL,
c1 INT DEFAULT NULL
);
INSERT INTO t1 VALUES (1,1),(1,2),(2,3),(2,4);
SELECT NULLIF(COUNT(c1),0) AS c1,NULLIF(COUNT(c1)+0,0) AS c1_wrapped,CASE WHEN COUNT(c1) IS NULL THEN 0 ELSE COUNT(c1) END AS c1_case FROM t1 GROUP BY id;
DROP TABLE t1;
# Testing with side effects
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
SET @a=0;
SELECT NULLIF(LAST_VALUE(@a:=@a+1,a),0) FROM t1;
SELECT @a;
SET @a=0;
SELECT NULLIF(AVG(a),0), NULLIF(AVG(LAST_VALUE(@a:=@a+1,a)),0) FROM t1;
SELECT @a;
# There should not be cache in here:
EXPLAIN EXTENDED SELECT NULLIF(a,0) FROM t1;
# But there should be a cache in here:
EXPLAIN EXTENDED SELECT NULLIF(AVG(a),0) FROM t1;
DROP TABLE t1;
#
# MDEV-9576 syntax error on view with nullif and count
#
create table t1 (col1 varchar(50));
create view v1 AS select nullif(count(distinct col1),0) from t1;
show create view v1;
drop view v1;
drop table t1;
#
# MDEV-9637 select nullif(count(col1),0) gives wrong result if in a view
#
create table t1 (col1 varchar(50) default null);
insert into t1 (col1) values ('hello'), ('hello'), ('hello');
create view v1 as select nullif(count(col1),0) from t1;
select * from v1;
select nullif(count(col1),0) from t1;
drop view v1;
drop table t1;
#
# MDEV-9644 Assertion `args[0] == args[2] || thd->stmt_arena->is_stmt_execute()' failed in Item_func_nullif::fix_length_and_dec()
#
select nullif((select 1), (select 2));
create table t1 (f int);
insert into t1 values (1),(2);
select nullif( not f, 1 ) from t1;
drop table t1;
#
# MDEV-9641 Assertion `args[0] == args[2] || _current_thd()->lex->context_analysis_only' failed in Item_func_nullif::print(String*, enum_query_type)
#
set names utf8;
create table t1 (f1 varchar(10));
insert into t1 values ('2015-12-31');
--error ER_DATA_OUT_OF_RANGE
select power( timestamp( nullif( '2002-09-08', f1 ) ), 24 ) from t1;
drop table t1;
#
# MDEV-9682 Assertion `0' failed in Item_cache_row::illegal_method_call on 2nd execution of PS with NULLIF
#
CREATE TABLE t1 (f1 INT);
INSERT INTO t1 VALUES (1),(2);
PREPARE stmt FROM "SELECT * FROM t1 WHERE NULLIF( ( 1, 2 ) IN ( SELECT 3, 4 ), 1 )";
EXECUTE stmt;
EXECUTE stmt;
DROP TABLE t1;
#
# MDEV-9683 Server crashes in Item::basic_const_item on numerous nested NULLIFs
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT * FROM t1 WHERE NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(NULLIF(i = ROUND(0), 14), 13), 12), 11), 10), 9), 8), 7), 6), 5), 4), 3), 2), 1);
DROP TABLE t1;
--echo #
--echo # MDEV-10347 mysqld got signal 11
--echo #
CREATE TABLE t1 (f1 VARCHAR(10), f2 VARCHAR(40));
CREATE TABLE t2 (f3 VARCHAR(20));
PREPARE stmt FROM "
SELECT (
SELECT IFNULL(f3,4) FROM t2
WHERE IFNULL(NULLIF(f1,''),1)
) AS sq
FROM t1
GROUP BY f2
";
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
DROP TABLE t2,t1;
--echo #
--echo # MDEV-10236 Where expression with NOT function gives incorrect result
--echo #
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1),(2),(3);
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE ((c1 IS NOT NULL) >= (NOT TRUE)) IS NOT NULL;
SELECT * FROM t1 WHERE ((c1 IS NOT NULL) >= (NOT TRUE)) IS NOT NULL;
DROP TABLE t1;
--echo #
--echo # End of 10.1 tests
--echo #
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