test cardinality with add/drop key

mysql-test/suite/tokudb/r/card_add_index.result

+drop table if exists tt;
+create table tt (a int, b int, c int, primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+analyze table tt;
+Table	Op	Msg_type	Msg_text
+test.tt	analyze	status	OK
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+alter table tt add key (b);
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE		
+analyze table tt;
+Table	Op	Msg_type	Msg_text
+test.tt	analyze	status	OK
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+alter table tt add key (c);
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	NULL	NULL	NULL	YES	BTREE		
+analyze table tt;
+Table	Op	Msg_type	Msg_text
+test.tt	analyze	status	OK
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	2	NULL	NULL	YES	BTREE		
+flush tables;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	2	NULL	NULL	YES	BTREE		
+drop table tt;

mysql-test/suite/tokudb/r/card_drop_index.result

+drop table if exists tt;
+create table tt (a int, b int, c int, key(b), key(c), primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	NULL	NULL	NULL	YES	BTREE		
+analyze table tt;
+Table	Op	Msg_type	Msg_text
+test.tt	analyze	status	OK
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	2	NULL	NULL	YES	BTREE		
+alter table tt drop key b;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	c	1	c	A	2	NULL	NULL	YES	BTREE		
+alter table tt drop key c;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+flush tables;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+drop table tt;

mysql-test/suite/tokudb/r/card_drop_pk.result

+drop table if exists tt;
+create table tt (a int, b int, c int, key(b), key(c), primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	NULL	NULL	NULL	YES	BTREE		
+analyze table tt;
+Table	Op	Msg_type	Msg_text
+test.tt	analyze	status	OK
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	0	PRIMARY	1	a	A	4	NULL	NULL		BTREE		
+tt	1	b	1	b	A	1	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	2	NULL	NULL	YES	BTREE		
+alter table tt drop primary key;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	NULL	NULL	NULL	YES	BTREE		
+flush tables;
+show indexes from tt;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
+tt	1	b	1	b	A	NULL	NULL	NULL	YES	BTREE		
+tt	1	c	1	c	A	NULL	NULL	NULL	YES	BTREE		
+drop table tt;

mysql-test/suite/tokudb/t/card_add_index.test

+# test that add index keeps cardinality for older indexes
+
+source include/have_tokudb.inc;
+
+disable_warnings;
+drop table if exists tt;
+enable_warnings;
+
+create table tt (a int, b int, c int, primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+
+# test that analyze computes the correct cardinality for the PK
+show indexes from tt;
+analyze table tt;
+show indexes from tt;
+
+# add a key(b)
+alter table tt add key (b);
+show indexes from tt;
+analyze table tt;
+show indexes from tt;
+
+# add a key(c)
+alter table tt add key (c);
+show indexes from tt;
+analyze table tt;
+show indexes from tt;
+
+# test that cardinality is persistent
+flush tables;
+show indexes from tt;
+
+drop table tt;

mysql-test/suite/tokudb/t/card_drop_index.test

+# test that add index keeps cardinality for older indexes
+
+source include/have_tokudb.inc;
+
+disable_warnings;
+drop table if exists tt;
+enable_warnings;
+
+create table tt (a int, b int, c int, key(b), key(c), primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+
+# compute cardinality
+show indexes from tt;
+analyze table tt;
+show indexes from tt;
+
+# drop key b
+alter table tt drop key b;
+show indexes from tt;
+
+# drop key c
+alter table tt drop key c;
+show indexes from tt;
+
+# test that cardinality is persistent
+flush tables;
+show indexes from tt;
+
+drop table tt;

mysql-test/suite/tokudb/t/card_drop_pk.test

+# test that add index keeps cardinality for older indexes
+
+source include/have_tokudb.inc;
+
+disable_warnings;
+drop table if exists tt;
+enable_warnings;
+
+create table tt (a int, b int, c int, key(b), key(c), primary key(a));
+insert into tt values (1,0,0),(2,0,0),(3,0,1),(4,0,1);
+
+# compute cardinality
+show indexes from tt;
+analyze table tt;
+show indexes from tt;
+
+# drop key a
+alter table tt drop primary key;
+show indexes from tt;
+
+# test that cardinality is persistent
+flush tables;
+show indexes from tt;
+
+drop table tt;