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SET timestamp=1;
CREATE DATABASE test1;
use test1;
#
# A) Test displaying create_options from I_S.TABLES.CREATE_OPTIONS
#
CREATE TABLE t1 (a INT NOT NULL,b INT NOT NULL, PRIMARY KEY USING BTREE (a))
ENGINE=MYISAM COMMENT="TESTING" PACK_KEYS=1 DELAY_KEY_WRITE=1
STATS_PERSISTENT=1 CHECKSUM=1 MIN_ROWS=1 MAX_ROWS=100;
CREATE TABLE t2 (a INT NOT NULL,b INT NOT NULL, PRIMARY KEY USING BTREE (a))
ENGINE=MYISAM COMMENT="TESTING" PACK_KEYS=0 DELAY_KEY_WRITE=1
STATS_PERSISTENT=1 CHECKSUM=1 MIN_ROWS=1 MAX_ROWS=100;
SELECT CREATE_OPTIONS FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME='t1' OR TABLE_NAME='t2';
CREATE_OPTIONS
max_rows=100 min_rows=1 stats_persistent=1 pack_keys=1 checksum=1 delay_key_write=1
max_rows=100 min_rows=1 stats_persistent=1 pack_keys=0 checksum=1 delay_key_write=1
DROP TABLE t1;
DROP TABLE t2;
#
# C) Test SHOW COLUMNS/KEYS on temporary tables.
#
CREATE TEMPORARY TABLE t1 (
a INTEGER NOT NULL DEFAULT 1,
b INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
c INTEGER,
d INTEGER GENERATED ALWAYS AS (a * 2) STORED,
e POINT NOT NULL SRID 0,
f CHAR(30),
g INT,
h TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
KEY(g), SPATIAL KEY(e), FULLTEXT(f)) engine=myisam;
CREATE INDEX b_index USING btree ON t1( b );
CREATE INDEX h_index USING hash ON t1( c );
Warnings:
Note 3502 This storage engine does not support the HASH index algorithm, storage engine default was used instead.
CREATE INDEX g_index ON t1( f(4) ) COMMENT 'ABC';
CREATE INDEX r_index USING rtree ON t1( a ) USING btree;
SHOW FULL COLUMNS FROM t1;
Field Type Collation Null Key Default Extra Privileges Comment
a int NULL NO MUL 1 NULL select,insert,update,references
b int NULL NO PRI NULL auto_increment select,insert,update,references
c int NULL YES MUL NULL NULL select,insert,update,references
d int NULL YES NULL STORED GENERATED select,insert,update,references
e point NULL NO MUL NULL NULL select,insert,update,references
f char(30) utf8mb4_0900_ai_ci YES MUL NULL NULL select,insert,update,references
g int NULL YES MUL NULL NULL select,insert,update,references
h timestamp NULL NO CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP select,insert,update,references
SHOW KEYS FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 0 PRIMARY 1 b A 0 NULL NULL BTREE YES NULL
t1 1 g 1 g A NULL NULL NULL YES BTREE YES NULL
t1 1 e 1 e A NULL 32 NULL SPATIAL YES NULL
t1 1 b_index 1 b A NULL NULL NULL BTREE YES NULL
t1 1 h_index 1 c A NULL NULL NULL YES BTREE YES NULL
t1 1 g_index 1 f A NULL 4 NULL YES BTREE ABC YES NULL
t1 1 r_index 1 a A NULL NULL NULL BTREE YES NULL
t1 1 f 1 f NULL NULL NULL NULL YES FULLTEXT YES NULL
SHOW FULL COLUMNS FROM t1 WHERE FIELD = 'a' OR FIELD = 'b';
Field Type Collation Null Key Default Extra Privileges Comment
a int NULL NO MUL 1 NULL select,insert,update,references
b int NULL NO PRI NULL auto_increment select,insert,update,references
SHOW KEYS FROM t1 WHERE KEY_NAME = 'r_index' OR KEY_NAME = 'h_index';
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 1 h_index 1 c A NULL NULL NULL YES BTREE YES NULL
t1 1 r_index 1 a A NULL NULL NULL BTREE YES NULL
DROP TEMPORARY TABLE t1;
DROP DATABASE test1;
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