| Server IP : 49.212.180.16 / Your IP : 18.221.35.244 Web Server : Apache System : FreeBSD www2606.sakura.ne.jp 13.0-RELEASE-p14 FreeBSD 13.0-RELEASE-p14 #2: Mon Dec 9 13:54:55 JST 2024 root@www5301.sakura.ne.jp:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 User : utannto ( 1076) PHP Version : 7.4.33 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : OFF | Perl : ON | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /home/rs/mysql/5.1/mysql-test/r/ |
Upload File : |
# ===== csv_alter_table.1 ===== DROP TABLE IF EXISTS t1; CREATE TABLE t1 (a int NOT NULL) ENGINE = CSV; ALTER TABLE t1 ADD COLUMN b CHAR(5) NOT NULL; DESC t1; Field Type Null Key Default Extra a int(11) NO NULL b char(5) NO NULL ALTER TABLE t1 DROP COLUMN b; DESC t1; Field Type Null Key Default Extra a int(11) NO NULL ALTER TABLE t1 MODIFY a BIGINT NOT NULL; DESC t1; Field Type Null Key Default Extra a bigint(20) NO NULL ALTER TABLE t1 CHANGE a a INT NOT NULL; DESC t1; Field Type Null Key Default Extra a int(11) NO NULL DROP TABLE t1; # ===== csv_alter_table.2 ===== DROP TABLE IF EXISTS t1; CREATE TABLE t1 (a int NOT NULL) ENGINE = CSV; ALTER TABLE t1 ADD COLUMN b CHAR(5); ERROR 42000: The storage engine for the table doesn't support nullable columns DESC t1; Field Type Null Key Default Extra a int(11) NO NULL ALTER TABLE t1 MODIFY a BIGINT; ERROR 42000: The storage engine for the table doesn't support nullable columns DESC t1; Field Type Null Key Default Extra a int(11) NO NULL ALTER TABLE t1 CHANGE a a INT; ERROR 42000: The storage engine for the table doesn't support nullable columns DESC t1; Field Type Null Key Default Extra a int(11) NO NULL DROP TABLE t1;