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The problem was that some functions (namely IN() starting with 4.1, and CHAR() starting with 5.0) were returning NULL in certain conditions, while they didn't set their maybe_null flag. Because of that there could be some problems with 'IS NULL' check, and statements that depend on the function value domain, like CREATE TABLE t1 SELECT 1 IN (2, NULL);. The fix is to set maybe_null correctly. mysql-test/r/func_in.result: Add result for bug#17047: CHAR() and IN() can return NULL without signaling NULL result. mysql-test/t/func_in.test: Add test case for bug#17047: CHAR() and IN() can return NULL without signaling NULL result. sql/item_cmpfunc.cc: Remove assignment to maybe_null, as it was already set in fix_fields() based on all arguments, not only on the first.
133 lines
3.7 KiB
Plaintext
133 lines
3.7 KiB
Plaintext
# Initialise
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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#
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# test of IN (NULL)
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#
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select 1 in (1,2,3);
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select 10 in (1,2,3);
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select NULL in (1,2,3);
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select 1 in (1,NULL,3);
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select 3 in (1,NULL,3);
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select 10 in (1,NULL,3);
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select 1.5 in (1.5,2.5,3.5);
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select 10.5 in (1.5,2.5,3.5);
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select NULL in (1.5,2.5,3.5);
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select 1.5 in (1.5,NULL,3.5);
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select 3.5 in (1.5,NULL,3.5);
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select 10.5 in (1.5,NULL,3.5);
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CREATE TABLE t1 (a int, b int, c int);
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insert into t1 values (1,2,3), (1,NULL,3);
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select 1 in (a,b,c) from t1;
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select 3 in (a,b,c) from t1;
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select 10 in (a,b,c) from t1;
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select NULL in (a,b,c) from t1;
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drop table t1;
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CREATE TABLE t1 (a float, b float, c float);
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insert into t1 values (1.5,2.5,3.5), (1.5,NULL,3.5);
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select 1.5 in (a,b,c) from t1;
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select 3.5 in (a,b,c) from t1;
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select 10.5 in (a,b,c) from t1;
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drop table t1;
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CREATE TABLE t1 (a varchar(10), b varchar(10), c varchar(10));
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insert into t1 values ('A','BC','EFD'), ('A',NULL,'EFD');
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select 'A' in (a,b,c) from t1;
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select 'EFD' in (a,b,c) from t1;
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select 'XSFGGHF' in (a,b,c) from t1;
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drop table t1;
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CREATE TABLE t1 (field char(1));
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INSERT INTO t1 VALUES ('A'),(NULL);
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SELECT * from t1 WHERE field IN (NULL);
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SELECT * from t1 WHERE field NOT IN (NULL);
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SELECT * from t1 where field = field;
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SELECT * from t1 where field <=> field;
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DELETE FROM t1 WHERE field NOT IN (NULL);
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SELECT * FROM t1;
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drop table t1;
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create table t1 (id int(10) primary key);
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insert into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9);
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select * from t1 where id in (2,5,9);
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drop table t1;
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create table t1 (
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a char(1) character set latin1 collate latin1_general_ci,
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b char(1) character set latin1 collate latin1_swedish_ci,
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c char(1) character set latin1 collate latin1_danish_ci
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);
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insert into t1 values ('A','B','C');
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insert into t1 values ('a','c','c');
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--error 1267
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select * from t1 where a in (b);
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--error 1270
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select * from t1 where a in (b,c);
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--error 1271
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select * from t1 where 'a' in (a,b,c);
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select * from t1 where 'a' in (a);
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select * from t1 where a in ('a');
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select * from t1 where 'a' collate latin1_general_ci in (a,b,c);
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select * from t1 where 'a' collate latin1_bin in (a,b,c);
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select * from t1 where 'a' in (a,b,c collate latin1_bin);
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explain extended select * from t1 where 'a' in (a,b,c collate latin1_bin);
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drop table t1;
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set names utf8;
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create table t1 (a char(10) character set utf8 not null);
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insert into t1 values ('bbbb'),(_koi8r'<27><><EFBFBD><EFBFBD>'),(_latin1'<27><><EFBFBD><EFBFBD>');
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select a from t1 where a in ('bbbb',_koi8r'<27><><EFBFBD><EFBFBD>',_latin1'<27><><EFBFBD><EFBFBD>') order by a;
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drop table t1;
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# Bug#7834 Illegal mix of collations in IN operator
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create table t1 (a char(10) character set latin1 not null);
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insert into t1 values ('a'),('b'),('c');
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select a from t1 where a IN ('a','b','c') order by a;
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drop table t1;
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set names latin1;
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select '1.0' in (1,2);
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select 1 in ('1.0',2);
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select 1 in (1,'2.0');
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select 1 in ('1.0',2.0);
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select 1 in (1.0,'2.0');
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select 1 in ('1.1',2);
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select 1 in ('1.1',2.0);
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# Test case for bug #6365
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create table t1 (a char(20) character set binary);
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insert into t1 values ('aa'), ('bb');
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select * from t1 where a in (NULL, 'aa');
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drop table t1;
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# BUG#13419
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create table t1 (id int, key(id));
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insert into t1 values (1),(2),(3);
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select count(*) from t1 where id not in (1);
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select count(*) from t1 where id not in (1,2);
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drop table t1;
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#
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# BUG#17047: CHAR() and IN() can return NULL without signaling NULL
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# result
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#
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# The problem was in the IN() function that ignored maybe_null flags
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# of all arguments except the first (the one _before_ the IN
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# keyword, '1' in the test case below).
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#
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--disable_warnings
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DROP TABLE IF EXISTS t1;
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--enable_warnings
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CREATE TABLE t1 SELECT 1 IN (2, NULL);
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--echo SELECT should return NULL.
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SELECT * FROM t1;
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DROP TABLE t1;
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--echo End of 4.1 tests
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