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| DELIMITER $$
CREATE PROCEDURE `partition_create`(SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int)
BEGIN
DECLARE RETROWS INT;
SELECT COUNT(1) INTO RETROWS
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK;
IF RETROWS = 0 THEN
SELECT CONCAT( "partition_create(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg;
SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' );
PREPARE STMT FROM @sql;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
END IF;
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_drop`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), DELETE_BELOW_PARTITION_DATE BIGINT)
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE drop_part_name VARCHAR(16);
DECLARE myCursor CURSOR FOR
SELECT partition_name
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND CAST(SUBSTRING(partition_name FROM 2) AS UNSIGNED) < DELETE_BELOW_PARTITION_DATE;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
SET @alter_header = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " DROP PARTITION ");
SET @drop_partitions = "";
OPEN myCursor;
read_loop: LOOP
FETCH myCursor INTO drop_part_name;
IF done THEN
LEAVE read_loop;
END IF;
SET @drop_partitions = IF(@drop_partitions = "", drop_part_name, CONCAT(@drop_partitions, ",", drop_part_name));
END LOOP;
IF @drop_partitions != "" THEN
SET @full_sql = CONCAT(@alter_header, @drop_partitions, ";");
PREPARE STMT FROM @full_sql;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, @drop_partitions AS `partitions_deleted`;
ELSE
SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, "N/A" AS `partitions_deleted`;
END IF;
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT)
BEGIN
DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16);
DECLARE PARTITION_NAME VARCHAR(16);
DECLARE OLD_PARTITION_NAME VARCHAR(16);
DECLARE LESS_THAN_TIMESTAMP INT;
DECLARE CUR_TIME INT;
CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL);
SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00'));
SET @__interval = 1;
create_loop: LOOP
IF @__interval > CREATE_NEXT_INTERVALS THEN
LEAVE create_loop;
END IF;
SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600);
SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00');
IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN
CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP);
END IF;
SET @__interval=@__interval+1;
SET OLD_PARTITION_NAME = PARTITION_NAME;
END LOOP;
SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000');
CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE);
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE `partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11))
BEGIN
DECLARE PARTITION_NAME VARCHAR(16);
DECLARE RETROWS INT(11);
DECLARE FUTURE_TIMESTAMP TIMESTAMP;
SELECT COUNT(1) INTO RETROWS
FROM information_schema.partitions
WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL;
IF RETROWS = 1 THEN
SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00'));
SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00');
SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(`clock`)");
SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));");
PREPARE STMT FROM @__PARTITION_SQL;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;
END IF;
END$$
DELIMITER ;
DELIMITER $$
CREATE PROCEDURE`partition_maintenance_all`(SCHEMA_NAME VARCHAR(32))
BEGIN
CALL partition_maintenance(SCHEMA_NAME, 'history', 30, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_log', 30, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_str', 30, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_text', 30, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'history_uint', 30, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'trends', 120, 24, 14);
CALL partition_maintenance(SCHEMA_NAME, 'trends_uint', 120, 24, 14);
END$$
DELIMITER ;%
|
