[feature] Add upgrade scripts; Add fixes for postgres

schema/mysql/upgrade/upgradev730.sql

@@ -0,0 +1,18 @@
+DELIMITER DLM00
+
+DROP PROCEDURE IF EXISTS upgrade730 DLM00
+
+CREATE PROCEDURE upgrade730()
+BEGIN
+	
+	IF (SELECT DATA_TYPE FROM information_schema.`COLUMNS` WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'doc_changes' AND COLUMN_NAME = 'change_data') <> 'longblob' THEN
+		SET SQL_SAFE_UPDATES=0;
+		ALTER TABLE `doc_changes` CHANGE COLUMN `change_data` `change_data` LONGBLOB NOT NULL ;
+		SET SQL_SAFE_UPDATES=1;
+	END IF;
+
+END DLM00
+
+CALL upgrade730() DLM00
+
+DELIMITER ;

schema/postgresql/upgrade/upgradev730.sql

@@ -0,0 +1,9 @@
+DO $$ 
+	BEGIN
+		BEGIN
+			ALTER TABLE doc_changes ALTER COLUMN change_data TYPE bytea USING change_data::bytea;
+		EXCEPTION
+			WHEN duplicate_column THEN RAISE NOTICE 'cant modify doc_changes.change_data colummn';
+		END;
+	END;
+$$