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DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a <INT_COLUMN>,
b <CHAR_COLUMN>,
<CUSTOM_INDEX> (a) KEY_BLOCK_SIZE=8
) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
SHOW KEYS IN t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 1 a 1 a # # NULL NULL # #
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>,
b <CHAR_COLUMN>,
<CUSTOM_INDEX> ind1(b ASC) KEY_BLOCK_SIZE=0
) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
SHOW INDEX IN t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 1 ind1 1 b # # NULL NULL # #
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>,
b <CHAR_COLUMN>,
UNIQUE INDEX ind2(b(1) DESC) KEY_BLOCK_SIZE=32768 COMMENT 'big key_block_size value'
) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
SHOW INDEX IN t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 0 ind2 1 b # # 1 NULL # # big key_block_size value
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>,
b <CHAR_COLUMN>,
<CUSTOM_INDEX> a_b(a,b) KEY_BLOCK_SIZE=8192
) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
SHOW INDEX IN t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 1 a_b 1 a # # NULL NULL # #
t1 1 a_b 2 b # # NULL NULL # #
DROP TABLE t1;
CREATE TABLE t1 (a <INT_COLUMN>,
b <CHAR_COLUMN>
) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (100,'z');
ALTER TABLE t1 ADD <CUSTOM_INDEX>(a) KEY_BLOCK_SIZE 8192;
SHOW INDEX FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
t1 1 a 1 a # # NULL NULL # #
DROP TABLE t1;
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