97 lines
1.2 KiB
SQL
97 lines
1.2 KiB
SQL
drop procedure if exists update_storage_stats;
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delimiter //
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create procedure update_storage_stats(IN StorageId smallint(5), IN space BIGINT)
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sql security invoker
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deterministic
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begin
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update Storage set DiskSpace = DiskSpace + space where Id = StorageId;
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end;
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//
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delimiter ;
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drop trigger if exists event_update_trigger;
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delimiter //
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create trigger event_update_trigger
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after update
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on Events
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for each row
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begin
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declare diff BIGINT default 0;
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set diff = NEW.DiskSpace - OLD.DiskSpace;
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IF ( NEW.StorageId = OLD.StorageID ) THEN
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call update_storage_stats(OLD.StorageId, diff);
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ELSE
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call update_storage_stats(NEW.StorageId, NEW.DiskSpace);
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call update_storage_stats(OLD.StorageId, -OLD.DiskSpace);
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END IF;
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end;
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//
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delimiter ;
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drop trigger if exists event_insert_trigger;
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delimiter //
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create trigger event_insert_trigger
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after insert
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on Events
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for each row
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begin
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call update_storage_stats(NEW.StorageId, NEW.DiskSpace);
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end;
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//
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delimiter ;
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drop trigger if exists event_delete_trigger;
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delimiter //
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create trigger event_delete_trigger
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before delete
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on Events
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for each row
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begin
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call update_storage_stats(OLD.StorageId, -OLD.DiskSpace);
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end;
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//
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delimiter ;
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