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MySQL UDF for building JSON serialized records
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README
build-it-osx.sh
lib_mysqludf_json.c
lib_mysqludf_json.html
lib_mysqludf_json.sql

README

Fixed version of UDF available at http://www.mysqludf.org/lib_mysqludf_json/index.php.

Several buffer overrun problems were fixed.

Examples:

CREATE FUNCTION kick_photos (row_id INT) RETURNS INT BEGIN SELECT memc_set('queue_db', (json_object('insert' AS action, 'photos' AS table_name, photos.id AS id, json_members('data', json_object(photos.user_id AS `user_id`,photos.width AS `width`,photos.created_at AS `created_at`,photos.filename AS `filename`,photos.parent_id AS `parent_id`,photos.content_type AS `content_type`,photos.height AS `height`,photos.thumbnail AS `thumbnail`,photos.size AS `size`))))) INTO @dummy FROM photos WHERE id = row_id; RETURN @dummy; END
CREATE TRIGGER photos_INSERT AFTER INSERT ON photos FOR EACH ROW SET @dummy = memc_set('queue_db', (json_object('insert' AS action, 'photos' AS table_name, NEW.id AS id, json_members('data', json_object(NEW.user_id AS `user_id`,NEW.parent_id AS `parent_id`,NEW.created_at AS `created_at`,NEW.filename AS `filename`,NEW.width AS `width`,NEW.content_type AS `content_type`,NEW.height AS `height`,NEW.thumbnail AS `thumbnail`,NEW.size AS `size`)))))
CREATE TRIGGER photos_DELETE BEFORE DELETE ON photos FOR EACH ROW SET @dummy = memc_set('queue_db', (json_object('delete' AS action, 'photos' AS table_name, OLD.id AS id, json_members('data', json_object(OLD.user_id AS `user_id`,OLD.parent_id AS `parent_id`,OLD.created_at AS `created_at`,OLD.filename AS `filename`,OLD.width AS `width`,OLD.content_type AS `content_type`,OLD.height AS `height`,OLD.thumbnail AS `thumbnail`,OLD.size AS `size`)))))
CREATE TRIGGER photos_UPDATE AFTER UPDATE ON photos FOR EACH ROW BEGIN IF json_object(OLD.user_id AS `user_id`,OLD.parent_id AS `parent_id`,OLD.created_at AS `created_at`,OLD.filename AS `filename`,OLD.width AS `width`,OLD.content_type AS `content_type`,OLD.height AS `height`,OLD.thumbnail AS `thumbnail`,OLD.size AS `size`) <> json_object(NEW.user_id AS `user_id`,NEW.parent_id AS `parent_id`,NEW.created_at AS `created_at`,NEW.filename AS `filename`,NEW.width AS `width`,NEW.content_type AS `content_type`,NEW.height AS `height`,NEW.thumbnail AS `thumbnail`,NEW.size AS `size`) THEN SET @dummy = memc_set('queue_db', (json_object('update' AS action, 'photos' AS table_name, OLD.id AS id, json_members('new', json_object(NEW.user_id AS `user_id`,NEW.parent_id AS `parent_id`,NEW.created_at AS `created_at`,NEW.filename AS `filename`,NEW.width AS `width`,NEW.content_type AS `content_type`,NEW.height AS `height`,NEW.thumbnail AS `thumbnail`,NEW.size AS `size`)), json_members('old', json_object(OLD.user_id AS `user_id`,OLD.parent_id AS `parent_id`,OLD.created_at AS `created_at`,OLD.filename AS `filename`,OLD.width AS `width`,OLD.content_type AS `content_type`,OLD.height AS `height`,OLD.thumbnail AS `thumbnail`,OLD.size AS `size`))))); END IF; END 
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