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CREATE TABLE t1 (a INT,
b CHAR(8),
pk INT PRIMARY KEY,
KEY USING BTREE (a)
) ENGINE=rocksdb;
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 0 PRIMARY 1 pk A # NULL NULL LSMTREE
t1 1 a 1 a A # NULL NULL YES LSMTREE
DROP TABLE t1;
CREATE TABLE t1 (a INT,
b CHAR(8),
pk INT PRIMARY KEY,
KEY a_b USING BTREE (a,b) COMMENT 'a_b index'
) ENGINE=rocksdb;
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 0 PRIMARY 1 pk A # NULL NULL LSMTREE
t1 1 a_b 1 a A # NULL NULL YES LSMTREE a_b index
t1 1 a_b 2 b A # NULL NULL YES LSMTREE a_b index
DROP TABLE t1;
CREATE TABLE t1 (a INT,
b CHAR(8),
pk INT PRIMARY KEY,
KEY USING BTREE (a),
KEY USING BTREE (b)
) ENGINE=rocksdb;
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 0 PRIMARY 1 pk A # NULL NULL LSMTREE
t1 1 a 1 a A # NULL NULL YES LSMTREE
t1 1 b 1 b A # NULL NULL YES LSMTREE
DROP TABLE t1;
CREATE TABLE t1 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=rocksdb;
INSERT INTO t1 (a,b) VALUES (100,'z');
ALTER TABLE t1 ADD KEY (a) USING BTREE COMMENT 'simple index on a';
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 0 PRIMARY 1 pk A # NULL NULL LSMTREE
t1 1 a 1 a A # NULL NULL YES LSMTREE simple index on a
ALTER TABLE t1 DROP KEY a;
DROP TABLE t1;
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