basics for pg

lib/dialects/postgres/query-generator.js

@@ -870,7 +870,39 @@ module.exports = (function() {
      */
      */
     dropForeignKeyQuery: function(tableName, foreignKey) {
     dropForeignKeyQuery: function(tableName, foreignKey) {
       return 'ALTER TABLE ' + this.quoteIdentifier(tableName) + ' DROP CONSTRAINT ' + this.quoteIdentifier(foreignKey) + ';'
       return 'ALTER TABLE ' + this.quoteIdentifier(tableName) + ' DROP CONSTRAINT ' + this.quoteIdentifier(foreignKey) + ';'
-    }
+    },
+
+    /**
+     * Returns a query that starts a transaction.
+     *
+     * @param  {Boolean} value A boolean that states whether autocommit shall be done or not.
+     * @return {String}        The generated sql query.
+     */
+    setAutocommitQuery: function(value) {
+      return "SET autocommit = " + (!!value ? 1 : 0) + ";"
+    },
+
+    setIsolationLevelQuery: function(value) {
+      return "SET SESSION TRANSACTION ISOLATION LEVEL " + value + ";"
+    },
+
+    /**
+     * Returns a query that starts a transaction.
+     *
+     * @param  {Object} options An object with options.
+     * @return {String}         The generated sql query.
+     */
+    startTransactionQuery: function(options) {
+      return "START TRANSACTION;"
+    },
+
+    commitTransactionQuery: function(options) {
+      return "COMMIT;"
+    },
+
+    rollbackTransactionQuery: function(options) {
+      return "ROLLBACK;"
+    },
   }
   }
 
 
   // Private
   // Private