我正在尝试从Maria数据库中的laravel迁移创建此过程（源：https://mariadb.com/resources/blog/automatic-partition-maintenance-mariadb）：
DELIMITER $$
CREATE PROCEDURE db1.create_new_partitions(p_schema varchar(64), p_table varchar(64), p_months_to_add int)
LANGUAGE SQL
NOT DETERMINISTIC
SQL SECURITY INVOKER
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE current_partition_name varchar(64);
DECLARE current_partition_ts int;
-- We'll use this cursor later to check
-- whether a particular already exists.
-- @partition_name_to_add will be
-- set later.
DECLARE cur1 CURSOR FOR
SELECT partition_name
FROM information_schema.partitions
WHERE TABLE_SCHEMA = p_schema
AND TABLE_NAME = p_table
AND PARTITION_NAME != 'p_first'
AND PARTITION_NAME != 'p_future'
AND PARTITION_NAME = @partition_name_to_add;
-- We'll also use this cursor later
-- to query our temporary table.
DECLARE cur2 CURSOR FOR
SELECT partition_name, partition_range_ts
FROM partitions_to_add;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
DROP TEMPORARY TABLE IF EXISTS partitions_to_add;
CREATE TEMPORARY TABLE partitions_to_add (
partition_name varchar(64),
partition_range_ts int
);
SET @partitions_added = FALSE;
SET @months_ahead = 0;
-- Let's go through a loop and add each month individually between
-- the current month and the month p_months_to_add in the future.
WHILE @months_ahead <= p_months_to_add DO
-- We figure out what the correct month is by adding the
-- number of months to the current date
SET @date = CURDATE();
SET @q = 'SELECT DATE_ADD(?, INTERVAL ? MONTH) INTO @month_to_add';
PREPARE st FROM @q;
EXECUTE st USING @date, @months_ahead;
DEALLOCATE PREPARE st;
SET @months_ahead = @months_ahead + 1;
-- Then we format the month in the same format used
-- in our partition names.
SET @q = 'SELECT DATE_FORMAT(@month_to_add, ''%Y%m'') INTO @formatted_month_to_add';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
-- And then we use the formatted date to build the name of the
-- partition that we want to add. This partition name is
-- assigned to @partition_name_to_add, which is used in
-- the cursor declared at the start of the procedure.
SET @q = 'SELECT CONCAT(''p'', @formatted_month_to_add) INTO @partition_name_to_add';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
SET done = FALSE;
SET @first = TRUE;
-- And then we loop through the results returned by the cursor,
-- and if a row already exists for the current partition,
-- then we do not need to create the partition.
OPEN cur1;
read_loop: LOOP
FETCH cur1 INTO current_partition_name;
-- The cursor returned 0 rows, so we can create the partition.
IF done AND @first THEN
SELECT CONCAT('Creating partition: ', @partition_name_to_add);
-- Now we need to get the end date of the new partition.
-- Note that the date is for the non-inclusive end range,
-- so we actually need the date of the first day of the *next* month.
-- First, let's get a date variable for the first of the partition month
SET @q = 'SELECT DATE_FORMAT(@month_to_add, ''%Y-%m-01 00:00:00'') INTO @month_to_add';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
-- Then, let's add 1 month
SET @q = 'SELECT DATE_ADD(?, INTERVAL 1 MONTH) INTO @partition_end_date';
PREPARE st FROM @q;
EXECUTE st USING @month_to_add;
DEALLOCATE PREPARE st;
-- We need the date in UNIX timestamp format.
SELECT UNIX_TIMESTAMP(@partition_end_date) INTO @partition_end_ts;
-- Now insert the information into our temporary table
INSERT INTO partitions_to_add VALUES (@partition_name_to_add, @partition_end_ts);
SET @partitions_added = TRUE;
END IF;
-- Since we had at least one row returned, we know the
-- partition already exists.
IF ! @first THEN
LEAVE read_loop;
END IF;
SET @first = FALSE;
END LOOP;
CLOSE cur1;
END WHILE;
-- Let's actually add the partitions now.
IF @partitions_added THEN
-- First we need to build the actual ALTER TABLE query.
SET @schema = p_schema;
SET @table = p_table;
SET @q = 'SELECT CONCAT(''ALTER TABLE '', @schema, ''.'', @table, '' REORGANIZE PARTITION p_future INTO ( '') INTO @query';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
SET done = FALSE;
SET @first = TRUE;
OPEN cur2;
read_loop: LOOP
FETCH cur2 INTO current_partition_name, current_partition_ts;
IF done THEN
LEAVE read_loop;
END IF;
-- If it is not the first partition,
-- then we need to add a comma
IF ! @first THEN
SET @q = 'SELECT CONCAT(@query, '', '') INTO @query';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
END IF;
-- Add the current partition
SET @partition_name = current_partition_name;
SET @partition_ts = current_partition_ts;
SET @q = 'SELECT CONCAT(@query, ''PARTITION '', @partition_name, '' VALUES LESS THAN ('', @partition_ts, '')'') INTO @query';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
SET @first = FALSE;
END LOOP;
CLOSE cur2;
-- We also need to include the p_future partition
SET @q = 'SELECT CONCAT(@query, '', PARTITION p_future VALUES LESS THAN (MAXVALUE))'') INTO @query';
PREPARE st FROM @q;
EXECUTE st;
DEALLOCATE PREPARE st;
-- And then we prepare and execute the ALTER TABLE query.
PREPARE st FROM @query;
EXECUTE st;
DEALLOCATE PREPARE st;
END IF;
DROP TEMPORARY TABLE partitions_to_add;
END$$
DELIMITER ;
我使用Heredoc设置变量：
$createTableProcedure = <<<SQL
DELIMITER $$
CREATE PROCEDURE ...
END
$$
DELIMITER ;
SQL;
DB::unprepared($createTableProcedure);
此代码可在控制台或我的SequelPro中正常运行。但是laravel返回MariaDB语法错误。 对于类似问题的答案（https://stackoverflow.com/a/18393771/928666）指出：
DELIMITER不是有效的sql语句。这只是一个MySql客户端命令。因此，请不要使用它。
好的，所以我删除了DELIMITER的更改，但是现在在第6行出现语法错误，这是BEGIN之后的第一个DECLARE语句：
DECLARE done INT DEFAULT FALSE;
为此，我还找到了一个堆栈（https://stackoverflow.com/a/36158005/928666），其中指出：
在存储的proc定义前后缺少分隔符定义
所以现在我很高兴地以循环结尾。无论如何，我最终都会遇到语法错误。
那么如何从laravel迁移中创建该过程？
答案 0 :(得分：2)
您可以像这样在Laravel中创建存储过程，这将使DELIMITER过时：
$procedure = "
CREATE PROCEDURE `your_new_procedure`(procedure_param_1 TEXT, procedure_param_2 INT)
BEGIN
// Your SP here
END
";
DB::unprepared("DROP procedure IF EXISTS your_new_procedure");
DB::unprepared($procedure);
并称之为：
DB:raw(
'call your_new_procedure(?, ?),
[
$var2,
$var2,
]
);
来源：Laravel中的存储过程 https://medium.com/@smayzes/stored-procedures-in-laravel-60e7cb255fc9