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8cfe729678
not default_charset_into. It fixes the problem that in some cases numbers where treated as CHAR(N), not as BINARY(N), e.g. wrong 'charsetnr' when sent to the client side. 2. IFNULL didn't aggregate argument charsets and collations, so IFNULL(1,'a') produced a CHAR(N). Now produces a BINARY(N). 3. SELECT PROCEDURE ANALIZE now returns BINARY columns, which is much better than it worked previously: CHAR with the default character set. But in the future it's worth to fix the fields 'Field_name' and 'Optimal_fieldtype' to use UTF8, and 'Min_value' and 'Max_value' to inherit their charsets from the original items. But it is not important, and BINARY(N) is OK for now. 4. Tests were fixed accordingly. No new tests were made, as the old onces cover everything.
105 lines
5.8 KiB
Plaintext
105 lines
5.8 KiB
Plaintext
drop table if exists t1,t2;
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create table t1 (i int, j int, empty_string char(10), bool char(1), d date);
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insert into t1 values (1,2,"","Y","2002-03-03"), (3,4,"","N","2002-03-04"), (5,6,"","Y","2002-03-04"), (7,8,"","N","2002-03-05");
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select count(*) from t1 procedure analyse();
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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count(*) 4 4 1 1 0 0 4.0000 0.0000 ENUM('4') NOT NULL
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select * from t1 procedure analyse();
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.i 1 7 1 1 0 0 4.0000 2.2361 ENUM('1','3','5','7') NOT NULL
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test.t1.j 2 8 1 1 0 0 5.0000 2.2361 ENUM('2','4','6','8') NOT NULL
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test.t1.empty_string 0 0 4 0 0.0000 NULL CHAR(0) NOT NULL
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test.t1.bool N Y 1 1 0 0 1.0000 NULL ENUM('N','Y') NOT NULL
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test.t1.d 2002-03-03 2002-03-05 10 10 0 0 10.0000 NULL ENUM('2002-03-03','2002-03-04','2002-03-05') NOT NULL
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select * from t1 procedure analyse(2);
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.i 1 7 1 1 0 0 4.0000 2.2361 TINYINT(1) UNSIGNED NOT NULL
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test.t1.j 2 8 1 1 0 0 5.0000 2.2361 TINYINT(1) UNSIGNED NOT NULL
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test.t1.empty_string 0 0 4 0 0.0000 NULL CHAR(0) NOT NULL
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test.t1.bool N Y 1 1 0 0 1.0000 NULL ENUM('N','Y') NOT NULL
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test.t1.d 2002-03-03 2002-03-05 10 10 0 0 10.0000 NULL ENUM('2002-03-03','2002-03-04','2002-03-05') NOT NULL
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create table t2 select * from t1 procedure analyse();
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select * from t2;
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.i 1 7 1 1 0 0 4.0000 2.2361 ENUM('1','3','5','7') NOT NULL
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test.t1.j 2 8 1 1 0 0 5.0000 2.2361 ENUM('2','4','6','8') NOT NULL
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test.t1.empty_string 0 0 4 0 0.0000 NULL CHAR(0) NOT NULL
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test.t1.bool N Y 1 1 0 0 1.0000 NULL ENUM('N','Y') NOT NULL
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test.t1.d 2002-03-03 2002-03-05 10 10 0 0 10.0000 NULL ENUM('2002-03-03','2002-03-04','2002-03-05') NOT NULL
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drop table t1,t2;
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EXPLAIN SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE();
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 1
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2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
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create table t1 (a int not null);
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create table t2 select * from t1 where 0=1 procedure analyse();
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`Field_name` binary(255) NOT NULL default '',
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`Min_value` binary(255) default NULL,
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`Max_value` binary(255) default NULL,
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`Min_length` bigint(11) NOT NULL default '0',
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`Max_length` bigint(11) NOT NULL default '0',
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`Empties_or_zeros` bigint(11) NOT NULL default '0',
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`Nulls` bigint(11) NOT NULL default '0',
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`Avg_value_or_avg_length` binary(255) NOT NULL default '',
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`Std` binary(255) default NULL,
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`Optimal_fieldtype` binary(64) NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t1 where 0=1 procedure analyse();
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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insert into t1 values(1);
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drop table t2;
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create table t2 select * from t1 where 0=1 procedure analyse();
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`Field_name` binary(255) NOT NULL default '',
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`Min_value` binary(255) default NULL,
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`Max_value` binary(255) default NULL,
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`Min_length` bigint(11) NOT NULL default '0',
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`Max_length` bigint(11) NOT NULL default '0',
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`Empties_or_zeros` bigint(11) NOT NULL default '0',
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`Nulls` bigint(11) NOT NULL default '0',
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`Avg_value_or_avg_length` binary(255) NOT NULL default '',
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`Std` binary(255) default NULL,
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`Optimal_fieldtype` binary(64) NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t2;
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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insert into t2 select * from t1 procedure analyse();
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select * from t2;
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.a 1 1 1 1 0 0 1.0000 0.0000 ENUM('1') NOT NULL
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insert into t1 values(2);
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drop table t2;
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create table t2 select * from t1 where 0=1 procedure analyse();
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`Field_name` binary(255) NOT NULL default '',
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`Min_value` binary(255) default NULL,
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`Max_value` binary(255) default NULL,
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`Min_length` bigint(11) NOT NULL default '0',
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`Max_length` bigint(11) NOT NULL default '0',
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`Empties_or_zeros` bigint(11) NOT NULL default '0',
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`Nulls` bigint(11) NOT NULL default '0',
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`Avg_value_or_avg_length` binary(255) NOT NULL default '',
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`Std` binary(255) default NULL,
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`Optimal_fieldtype` binary(64) NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t2;
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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insert into t2 select * from t1 procedure analyse();
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select * from t2;
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.a 1 2 1 1 0 0 1.5000 0.5000 ENUM('1','2') NOT NULL
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drop table t1,t2;
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create table t1 (v varchar(128));
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insert into t1 values ('abc'),('abc\'def\\hij\"klm\0opq'),('\''),('\"'),('\\'),('a\0'),('b\''),('c\"'),('d\\'),('\'b'),('\"c'),('\\d'),('a\0\0\0b'),('a\'\'\'\'b'),('a\"\"\"\"b'),('a\\\\\\\\b'),('\'\0\\\"'),('\'\''),('\"\"'),('\\\\'),('The\ZEnd');
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select * from t1 procedure analyse();
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Field_name Min_value Max_value Min_length Max_length Empties_or_zeros Nulls Avg_value_or_avg_length Std Optimal_fieldtype
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test.t1.v " \\ 1 19 0 0 3.7619 NULL ENUM('"','""','"c','\'\0\\"','\'','\'\'','\'b','a\0\0\0b','a\0','a""""b','a\'\'\'\'b','abc','abc\'def\\hij"klm\0opq','a\\\\\\\\b','b\'','c"','d\\','The\ZEnd','\\','\\d','\\\\') NOT NULL
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drop table t1;
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