diff --git a/src/query-builder/SelectQueryBuilder.ts b/src/query-builder/SelectQueryBuilder.ts
index 242a68fa10..582586c8ab 100644
--- a/src/query-builder/SelectQueryBuilder.ts
+++ b/src/query-builder/SelectQueryBuilder.ts
@@ -272,7 +272,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoin(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    innerJoin(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.join("INNER", entityOrProperty, alias, condition, parameters);
         return this;
     }
@@ -311,7 +311,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoin(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    leftJoin(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.join("LEFT", entityOrProperty, alias, condition, parameters);
         return this;
     }
@@ -350,7 +350,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndSelect(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    innerJoinAndSelect(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.innerJoin(entityOrProperty, alias, condition, parameters);
         return this;
@@ -376,7 +376,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndSelect(entity: Function|string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    leftJoinAndSelect(entity: Function|string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * LEFT JOINs table and adds all selection properties to SELECT.
@@ -390,7 +390,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndSelect(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    leftJoinAndSelect(entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.leftJoin(entityOrProperty, alias, condition, parameters);
         return this;
@@ -423,7 +423,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapMany(mapToProperty: string, entity: Function|string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    innerJoinAndMapMany(mapToProperty: string, entity: Function|string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * INNER JOINs table, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -432,7 +432,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapMany(mapToProperty: string, tableName: string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    innerJoinAndMapMany(mapToProperty: string, tableName: string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * INNER JOINs, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -441,7 +441,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapMany(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    innerJoinAndMapMany(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.join("INNER", entityOrProperty, alias, condition, parameters, mapToProperty, true);
         return this;
@@ -474,7 +474,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapOne(mapToProperty: string, entity: Function|string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    innerJoinAndMapOne(mapToProperty: string, entity: Function|string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * INNER JOINs table, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -483,7 +483,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapOne(mapToProperty: string, tableName: string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    innerJoinAndMapOne(mapToProperty: string, tableName: string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * INNER JOINs, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -492,7 +492,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    innerJoinAndMapOne(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    innerJoinAndMapOne(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.join("INNER", entityOrProperty, alias, condition, parameters, mapToProperty, false);
         return this;
@@ -525,7 +525,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapMany(mapToProperty: string, entity: Function|string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    leftJoinAndMapMany(mapToProperty: string, entity: Function|string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * LEFT JOINs table, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -534,7 +534,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapMany(mapToProperty: string, tableName: string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    leftJoinAndMapMany(mapToProperty: string, tableName: string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * LEFT JOINs, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -543,7 +543,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapMany(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    leftJoinAndMapMany(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.join("LEFT", entityOrProperty, alias, condition, parameters, mapToProperty, true);
         return this;
@@ -576,7 +576,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapOne(mapToProperty: string, entity: Function|string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    leftJoinAndMapOne(mapToProperty: string, entity: Function|string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * LEFT JOINs table, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -585,7 +585,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapOne(mapToProperty: string, tableName: string, alias: string, condition: string, parameters?: ObjectLiteral): this;
+    leftJoinAndMapOne(mapToProperty: string, tableName: string, alias: string, condition?: string, parameters?: ObjectLiteral): this;
 
     /**
      * LEFT JOINs, SELECTs the data returned by a join and MAPs all that data to some entity's property.
@@ -594,7 +594,7 @@ export class SelectQueryBuilder<Entity> extends QueryBuilder<Entity> implements
      * You also need to specify an alias of the joined data.
      * Optionally, you can add condition and parameters used in condition.
      */
-    leftJoinAndMapOne(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition: string = "", parameters?: ObjectLiteral): this {
+    leftJoinAndMapOne(mapToProperty: string, entityOrProperty: Function|string|((qb: SelectQueryBuilder<any>) => SelectQueryBuilder<any>), alias: string, condition?: string, parameters?: ObjectLiteral): this {
         this.addSelect(alias);
         this.join("LEFT", entityOrProperty, alias, condition, parameters, mapToProperty, false);
         return this;