Rename column for all tables in mysql database - mysql

Question

I need to rename column for all tables in my databse.
I could get list of columns using this query:
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME= <Column Name>;
But how actually I could rename it as simple as possible and do not write
ALTER TABLE <Table Name >RENAME COLUMN <Old name> to <New Name>;
for each table.
I've tried to write a procedure:
DELIMITER $$
DROP PROCEDURE IF EXISTS renameColumn $$
CREATE PROCEDURE renameColumn(IN oldName tinytext, IN newName tinytext)
BEGIN
DECLARE #name VARCHAR(255);
DECLARE exit_loop BOOLEAN;
DECLARE tableName_cursor CURSOR FOR SELECT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME=oldName;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET exit_loop = TRUE;
OPEN tableName_cursor;
rename_loop: LOOP
FETCH tableName_cursor #name;
ALTER TABLE #name RENAME COLUMN oldName to newName;
IF exit_loop THEN
LEAVE rename_loop;
END IF;
END LOOP rename_loop;
END $$
DELIMITER;
But I have the following error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '#name VARCHAR(255);
DECLARE exit_loop BOOLEAN;
DECLARE ta' at line 3
Could you please help me to resolve this issue

Answer 1

You can try this.
SELECT CONCAT(
'ALTER TABLE ', TABLE_NAME,
' RENAME COLUMN ', COLUMN_NAME,
' NEW_', COLUMN_NAME,
';') AS rename_script
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = 'your_db'

Answer 2

Try the following solution hope it will help
DECLARE #name VARCHAR(50) -- database name
DECLARE db_cursor CURSOR FOR
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME= 'OldColumn';
OPEN db_cursor
FETCH NEXT FROM db_cursor INTO #name
WHILE ##FETCH_STATUS = 0
BEGIN
set #name = #name + '.OldColumn'
EXEC sp_rename #name, 'NewColumn', 'COLUMN';
print(#name)
FETCH NEXT FROM db_cursor INTO #name
END
CLOSE db_cursor
DEALLOCATE db_cursor