mirror of
https://github.com/chatopera/cosin.git
synced 2025-08-01 16:38:02 +08:00
32 lines
659 B
SQL
32 lines
659 B
SQL
USE `cosinee`;
|
|
-- -----------------
|
|
-- prepare variables
|
|
-- -----------------
|
|
|
|
SET @dbname = DATABASE ( );
|
|
SET @tablename = "cs_fb_otn";
|
|
SET @columnname = "melink_num";
|
|
|
|
SET @preparedStatement = (
|
|
SELECT
|
|
IF
|
|
(
|
|
(
|
|
SELECT
|
|
COUNT( * )
|
|
FROM
|
|
INFORMATION_SCHEMA.COLUMNS
|
|
WHERE
|
|
( table_name = @tablename )
|
|
AND ( table_schema = @dbname )
|
|
AND ( column_name = @columnname )
|
|
) > 0,
|
|
"SELECT 1",
|
|
CONCAT( "ALTER TABLE ", @tablename, " ADD ", @columnname, " INT(11) DEFAULT 0 COMMENT 'Melink 点击数';" )
|
|
)
|
|
);
|
|
PREPARE alterIfNotExists
|
|
FROM
|
|
@preparedStatement;
|
|
EXECUTE alterIfNotExists;
|
|
DEALLOCATE PREPARE alterIfNotExists; |