mysql存储过程实现统计数据库下所有表行数

mysql存储过程实现统计数据库下所有表行数

-- 若存储过程已存在则删除
DROP PROCEDURE IF EXISTS sp_count_all_tables;




DELIMITER //
CREATE PROCEDURE sp_count_all_tables(IN db_name VARCHAR(255))
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE tname VARCHAR(255);
    DECLARE cur CURSOR FOR 
        SELECT table_name FROM information_schema.tables 
        WHERE table_schema = db_name AND table_type = 'BASE TABLE';
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
    
    CREATE TEMPORARY TABLE IF NOT EXISTS temp_counts (
        table_name VARCHAR(255),
        row_count BIGINT
    );
    TRUNCATE TABLE temp_counts;
    
    OPEN cur;
    
    read_loop: LOOP
        FETCH cur INTO tname;
        IF done THEN
            LEAVE read_loop;
        END IF;
        
        SET @sql = CONCAT('INSERT INTO temp_counts SELECT ''', tname, ''', COUNT(*) FROM `', db_name, '`.`', tname, '`');
        PREPARE stmt FROM @sql;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;
    END LOOP;
    
    CLOSE cur;
    
    SELECT * FROM temp_counts ORDER BY row_count desc;
    DROP TEMPORARY TABLE temp_counts;
END //
DELIMITER ;





CALL sp_count_all_tables('db_name');