diff --git a/pkg/compiler/compiler_member_test.go b/pkg/compiler/compiler_member_test.go
index 672a8d98..d67eb293 100644
--- a/pkg/compiler/compiler_member_test.go
+++ b/pkg/compiler/compiler_member_test.go
@@ -385,6 +385,118 @@ RETURN o1.first["second"][o2.prop].fourth["fifth"]["bottom"]
 			So(string(out), ShouldEqual, "1")
 		})
 	})
+
+	Convey("Optional chaining", t, func() {
+		Convey("Object", func() {
+			Convey("When value does not exist", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				LET obj = { foo: None }
+
+				RETURN obj.foo?.bar
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `null`)
+			})
+
+			Convey("When value does exists", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				LET obj = { foo: { bar: "bar" } }
+
+				RETURN obj.foo?.bar
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `"bar"`)
+			})
+		})
+
+		Convey("Array", func() {
+			Convey("When value does not exist", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				LET obj = { foo: None }
+
+				RETURN obj.foo?.bar?.[0]
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `null`)
+			})
+
+			Convey("When value does exists", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				LET obj = { foo: { bar: ["bar"] } }
+
+				RETURN obj.foo?.bar?.[0]
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `"bar"`)
+			})
+		})
+
+		Convey("Function", func() {
+			Convey("When value does not exist", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				RETURN FIRST([])?.foo
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `null`)
+			})
+
+			Convey("When value does exists", func() {
+				c := compiler.New()
+
+				p, err := c.Compile(`
+				RETURN FIRST([{ foo: "bar" }])?.foo
+			`)
+
+				So(err, ShouldBeNil)
+
+				out, err := p.Run(context.Background())
+
+				So(err, ShouldBeNil)
+
+				So(string(out), ShouldEqual, `"bar"`)
+			})
+		})
+	})
 }
 
 func BenchmarkMemberArray(b *testing.B) {
diff --git a/pkg/compiler/visitor.go b/pkg/compiler/visitor.go
index 1d3e0107..7cf82cde 100644
--- a/pkg/compiler/visitor.go
+++ b/pkg/compiler/visitor.go
@@ -876,13 +876,14 @@ func (v *visitor) doVisitMemberExpression(ctx *fql.MemberExpressionContext, scop
 	}
 
 	children := ctx.AllMemberExpressionPath()
-	path := make([]core.Expression, 0, len(children))
+	path := make([]*expressions.MemberPathSegment, 0, len(children))
 
 	for _, memberPath := range children {
 		var exp core.Expression
 		var err error
 
 		memberPath := memberPath.(*fql.MemberExpressionPathContext)
+		optional := memberPath.QuestionMark() != nil
 
 		if prop := memberPath.PropertyName(); prop != nil {
 			exp, err = v.doVisitPropertyNameContext(prop.(*fql.PropertyNameContext), scope)
@@ -896,7 +897,13 @@ func (v *visitor) doVisitMemberExpression(ctx *fql.MemberExpressionContext, scop
 			return nil, err
 		}
 
-		path = append(path, exp)
+		segment, err := expressions.NewMemberPathSegment(exp, optional)
+
+		if err != nil {
+			return nil, err
+		}
+
+		path = append(path, segment)
 	}
 
 	return expressions.NewMemberExpression(
diff --git a/pkg/parser/antlr/FqlParser.g4 b/pkg/parser/antlr/FqlParser.g4
index 3a952dae..2cf2b632 100644
--- a/pkg/parser/antlr/FqlParser.g4
+++ b/pkg/parser/antlr/FqlParser.g4
@@ -271,8 +271,8 @@ memberExpressionSource
     ;
 
 memberExpressionPath
-    : Dot propertyName
-    | computedPropertyName
+    : QuestionMark? Dot propertyName
+    | (QuestionMark Dot)? computedPropertyName
     ;
 
 functionCallExpression
diff --git a/pkg/parser/fql/FqlParser.interp b/pkg/parser/fql/FqlParser.interp
index 3175bf84..0668ce0f 100644
--- a/pkg/parser/fql/FqlParser.interp
+++ b/pkg/parser/fql/FqlParser.interp
@@ -211,4 +211,4 @@ variable
 
 
 atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 71, 644, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 4, 24, 9, 24, 4, 25, 9, 25, 4, 26, 9, 26, 4, 27, 9, 27, 4, 28, 9, 28, 4, 29, 9, 29, 4, 30, 9, 30, 4, 31, 9, 31, 4, 32, 9, 32, 4, 33, 9, 33, 4, 34, 9, 34, 4, 35, 9, 35, 4, 36, 9, 36, 4, 37, 9, 37, 4, 38, 9, 38, 4, 39, 9, 39, 4, 40, 9, 40, 4, 41, 9, 41, 4, 42, 9, 42, 4, 43, 9, 43, 4, 44, 9, 44, 4, 45, 9, 45, 4, 46, 9, 46, 4, 47, 9, 47, 4, 48, 9, 48, 4, 49, 9, 49, 4, 50, 9, 50, 4, 51, 9, 51, 4, 52, 9, 52, 4, 53, 9, 53, 4, 54, 9, 54, 4, 55, 9, 55, 4, 56, 9, 56, 4, 57, 9, 57, 4, 58, 9, 58, 4, 59, 9, 59, 4, 60, 9, 60, 4, 61, 9, 61, 4, 62, 9, 62, 4, 63, 9, 63, 4, 64, 9, 64, 4, 65, 9, 65, 4, 66, 9, 66, 3, 2, 7, 2, 134, 10, 2, 12, 2, 14, 2, 137, 11, 2, 3, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 7, 7, 7, 153, 10, 7, 12, 7, 14, 7, 156, 11, 7, 3, 7, 3, 7, 3, 8, 3, 8, 3, 8, 5, 8, 163, 10, 8, 3, 9, 3, 9, 5, 9, 167, 10, 9, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 5, 10, 175, 10, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 5, 10, 183, 10, 10, 3, 11, 3, 11, 5, 11, 187, 10, 11, 3, 11, 3, 11, 3, 11, 5, 11, 192, 10, 11, 3, 11, 3, 11, 3, 11, 3, 11, 5, 11, 198, 10, 11, 3, 11, 5, 11, 201, 10, 11, 3, 12, 3, 12, 3, 12, 3, 12, 5, 12, 207, 10, 12, 3, 12, 3, 12, 3, 12, 7, 12, 212, 10, 12, 12, 12, 14, 12, 215, 11, 12, 3, 12, 3, 12, 3, 12, 3, 12, 3, 12, 5, 12, 222, 10, 12, 3, 12, 3, 12, 3, 12, 7, 12, 227, 10, 12, 12, 12, 14, 12, 230, 11, 12, 3, 12, 3, 12, 5, 12, 234, 10, 12, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 5, 13, 243, 10, 13, 3, 14, 3, 14, 3, 14, 3, 14, 5, 14, 249, 10, 14, 3, 15, 3, 15, 5, 15, 253, 10, 15, 3, 16, 3, 16, 5, 16, 257, 10, 16, 3, 17, 3, 17, 5, 17, 261, 10, 17, 3, 18, 3, 18, 3, 18, 3, 19, 3, 19, 3, 19, 3, 19, 5, 19, 270, 10, 19, 3, 20, 3, 20, 5, 20, 274, 10, 20, 3, 21, 3, 21, 3, 21, 3, 21, 7, 21, 280, 10, 21, 12, 21, 14, 21, 283, 11, 21, 3, 22, 3, 22, 5, 22, 287, 10, 22, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 3, 23, 5, 23, 307, 10, 23, 3, 24, 3, 24, 3, 24, 3, 24, 3, 25, 3, 25, 3, 25, 7, 25, 316, 10, 25, 12, 25, 14, 25, 319, 11, 25, 3, 26, 3, 26, 3, 26, 3, 26, 7, 26, 325, 10, 26, 12, 26, 14, 26, 328, 11, 26, 3, 27, 3, 27, 3, 27, 3, 27, 3, 28, 3, 28, 3, 28, 3, 28, 3, 28, 3, 28, 5, 28, 340, 10, 28, 5, 28, 342, 10, 28, 3, 29, 3, 29, 3, 29, 3, 29, 3, 29, 3, 30, 3, 30, 3, 30, 3, 30, 5, 30, 353, 10, 30, 3, 31, 3, 31, 3, 31, 3, 31, 3, 31, 3, 31, 5, 31, 361, 10, 31, 3, 31, 5, 31, 364, 10, 31, 3, 32, 3, 32, 3, 32, 3, 32, 5, 32, 370, 10, 32, 3, 33, 3, 33, 3, 33, 3, 33, 3, 33, 5, 33, 377, 10, 33, 3, 34, 3, 34, 3, 34, 5, 34, 382, 10, 34, 3, 35, 3, 35, 3, 35, 5, 35, 387, 10, 35, 3, 35, 3, 35, 3, 35, 3, 35, 5, 35, 393, 10, 35, 3, 36, 3, 36, 3, 36, 3, 36, 7, 36, 399, 10, 36, 12, 36, 14, 36, 402, 11, 36, 3, 36, 5, 36, 405, 10, 36, 5, 36, 407, 10, 36, 3, 36, 3, 36, 3, 37, 3, 37, 3, 37, 3, 37, 7, 37, 415, 10, 37, 12, 37, 14, 37, 418, 11, 37, 3, 37, 5, 37, 421, 10, 37, 5, 37, 423, 10, 37, 3, 37, 3, 37, 3, 38, 3, 38, 3, 38, 3, 38, 3, 38, 3, 38, 3, 38, 3, 38, 3, 38, 5, 38, 436, 10, 38, 3, 39, 3, 39, 3, 39, 3, 39, 3, 40, 3, 40, 3, 40, 5, 40, 445, 10, 40, 3, 41, 3, 41, 3, 42, 3, 42, 3, 43, 3, 43, 3, 44, 3, 44, 3, 45, 3, 45, 3, 46, 3, 46, 3, 46, 3, 46, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 478, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 492, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 525, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 534, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 543, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 550, 10, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 3, 47, 5, 47, 561, 10, 47, 3, 47, 3, 47, 7, 47, 565, 10, 47, 12, 47, 14, 47, 568, 11, 47, 3, 48, 3, 48, 6, 48, 572, 10, 48, 13, 48, 14, 48, 573, 3, 49, 3, 49, 3, 49, 3, 49, 3, 49, 5, 49, 581, 10, 49, 3, 50, 3, 50, 3, 50, 5, 50, 586, 10, 50, 3, 51, 3, 51, 3, 51, 3, 51, 3, 52, 3, 52, 3, 53, 7, 53, 595, 10, 53, 12, 53, 14, 53, 598, 11, 53, 3, 54, 3, 54, 3, 54, 3, 54, 7, 54, 604, 10, 54, 12, 54, 14, 54, 607, 11, 54, 5, 54, 609, 10, 54, 3, 54, 3, 54, 3, 55, 3, 55, 3, 56, 3, 56, 3, 56, 5, 56, 618, 10, 56, 3, 57, 3, 57, 3, 57, 5, 57, 623, 10, 57, 3, 58, 3, 58, 3, 59, 3, 59, 3, 60, 3, 60, 3, 61, 3, 61, 3, 62, 3, 62, 3, 63, 3, 63, 3, 64, 3, 64, 3, 65, 3, 65, 3, 65, 3, 66, 3, 66, 3, 66, 2, 3, 92, 67, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 2, 10, 3, 2, 48, 49, 6, 2, 30, 31, 37, 39, 41, 62, 66, 66, 4, 2, 48, 48, 56, 57, 3, 2, 17, 22, 3, 2, 35, 36, 3, 2, 23, 25, 3, 2, 26, 27, 4, 2, 26, 27, 61, 61, 2, 688, 2, 135, 3, 2, 2, 2, 4, 141, 3, 2, 2, 2, 6, 143, 3, 2, 2, 2, 8, 145, 3, 2, 2, 2, 10, 148, 3, 2, 2, 2, 12, 154, 3, 2, 2, 2, 14, 162, 3, 2, 2, 2, 16, 166, 3, 2, 2, 2, 18, 182, 3, 2, 2, 2, 20, 200, 3, 2, 2, 2, 22, 233, 3, 2, 2, 2, 24, 242, 3, 2, 2, 2, 26, 248, 3, 2, 2, 2, 28, 252, 3, 2, 2, 2, 30, 256, 3, 2, 2, 2, 32, 260, 3, 2, 2, 2, 34, 262, 3, 2, 2, 2, 36, 265, 3, 2, 2, 2, 38, 273, 3, 2, 2, 2, 40, 275, 3, 2, 2, 2, 42, 284, 3, 2, 2, 2, 44, 306, 3, 2, 2, 2, 46, 308, 3, 2, 2, 2, 48, 312, 3, 2, 2, 2, 50, 320, 3, 2, 2, 2, 52, 329, 3, 2, 2, 2, 54, 341, 3, 2, 2, 2, 56, 343, 3, 2, 2, 2, 58, 352, 3, 2, 2, 2, 60, 354, 3, 2, 2, 2, 62, 369, 3, 2, 2, 2, 64, 376, 3, 2, 2, 2, 66, 381, 3, 2, 2, 2, 68, 386, 3, 2, 2, 2, 70, 394, 3, 2, 2, 2, 72, 410, 3, 2, 2, 2, 74, 435, 3, 2, 2, 2, 76, 437, 3, 2, 2, 2, 78, 444, 3, 2, 2, 2, 80, 446, 3, 2, 2, 2, 82, 448, 3, 2, 2, 2, 84, 450, 3, 2, 2, 2, 86, 452, 3, 2, 2, 2, 88, 454, 3, 2, 2, 2, 90, 456, 3, 2, 2, 2, 92, 477, 3, 2, 2, 2, 94, 569, 3, 2, 2, 2, 96, 580, 3, 2, 2, 2, 98, 585, 3, 2, 2, 2, 100, 587, 3, 2, 2, 2, 102, 591, 3, 2, 2, 2, 104, 596, 3, 2, 2, 2, 106, 599, 3, 2, 2, 2, 108, 612, 3, 2, 2, 2, 110, 617, 3, 2, 2, 2, 112, 622, 3, 2, 2, 2, 114, 624, 3, 2, 2, 2, 116, 626, 3, 2, 2, 2, 118, 628, 3, 2, 2, 2, 120, 630, 3, 2, 2, 2, 122, 632, 3, 2, 2, 2, 124, 634, 3, 2, 2, 2, 126, 636, 3, 2, 2, 2, 128, 638, 3, 2, 2, 2, 130, 641, 3, 2, 2, 2, 132, 134, 5, 4, 3, 2, 133, 132, 3, 2, 2, 2, 134, 137, 3, 2, 2, 2, 135, 133, 3, 2, 2, 2, 135, 136, 3, 2, 2, 2, 136, 138, 3, 2, 2, 2, 137, 135, 3, 2, 2, 2, 138, 139, 5, 12, 7, 2, 139, 140, 7, 2, 2, 3, 140, 3, 3, 2, 2, 2, 141, 142, 5, 6, 4, 2, 142, 5, 3, 2, 2, 2, 143, 144, 5, 8, 5, 2, 144, 7, 3, 2, 2, 2, 145, 146, 7, 51, 2, 2, 146, 147, 5, 10, 6, 2, 147, 9, 3, 2, 2, 2, 148, 149, 5, 104, 53, 2, 149, 150, 7, 66, 2, 2, 150, 11, 3, 2, 2, 2, 151, 153, 5, 14, 8, 2, 152, 151, 3, 2, 2, 2, 153, 156, 3, 2, 2, 2, 154, 152, 3, 2, 2, 2, 154, 155, 3, 2, 2, 2, 155, 157, 3, 2, 2, 2, 156, 154, 3, 2, 2, 2, 157, 158, 5, 16, 9, 2, 158, 13, 3, 2, 2, 2, 159, 163, 5, 18, 10, 2, 160, 163, 5, 100, 51, 2, 161, 163, 5, 60, 31, 2, 162, 159, 3, 2, 2, 2, 162, 160, 3, 2, 2, 2, 162, 161, 3, 2, 2, 2, 163, 15, 3, 2, 2, 2, 164, 167, 5, 20, 11, 2, 165, 167, 5, 22, 12, 2, 166, 164, 3, 2, 2, 2, 166, 165, 3, 2, 2, 2, 167, 17, 3, 2, 2, 2, 168, 169, 7, 45, 2, 2, 169, 170, 7, 66, 2, 2, 170, 171, 7, 33, 2, 2, 171, 174, 7, 13, 2, 2, 172, 175, 5, 22, 12, 2, 173, 175, 5, 60, 31, 2, 174, 172, 3, 2, 2, 2, 174, 173, 3, 2, 2, 2, 175, 176, 3, 2, 2, 2, 176, 177, 7, 14, 2, 2, 177, 183, 3, 2, 2, 2, 178, 179, 7, 45, 2, 2, 179, 180, 7, 66, 2, 2, 180, 181, 7, 33, 2, 2, 181, 183, 5, 92, 47, 2, 182, 168, 3, 2, 2, 2, 182, 178, 3, 2, 2, 2, 183, 19, 3, 2, 2, 2, 184, 186, 7, 38, 2, 2, 185, 187, 7, 41, 2, 2, 186, 185, 3, 2, 2, 2, 186, 187, 3, 2, 2, 2, 187, 188, 3, 2, 2, 2, 188, 191, 7, 13, 2, 2, 189, 192, 5, 22, 12, 2, 190, 192, 5, 60, 31, 2, 191, 189, 3, 2, 2, 2, 191, 190, 3, 2, 2, 2, 192, 193, 3, 2, 2, 2, 193, 194, 7, 14, 2, 2, 194, 201, 3, 2, 2, 2, 195, 197, 7, 38, 2, 2, 196, 198, 7, 41, 2, 2, 197, 196, 3, 2, 2, 2, 197, 198, 3, 2, 2, 2, 198, 199, 3, 2, 2, 2, 199, 201, 5, 92, 47, 2, 200, 184, 3, 2, 2, 2, 200, 195, 3, 2, 2, 2, 201, 21, 3, 2, 2, 2, 202, 203, 7, 37, 2, 2, 203, 206, 7, 66, 2, 2, 204, 205, 7, 10, 2, 2, 205, 207, 7, 66, 2, 2, 206, 204, 3, 2, 2, 2, 206, 207, 3, 2, 2, 2, 207, 208, 3, 2, 2, 2, 208, 209, 7, 62, 2, 2, 209, 213, 5, 24, 13, 2, 210, 212, 5, 30, 16, 2, 211, 210, 3, 2, 2, 2, 212, 215, 3, 2, 2, 2, 213, 211, 3, 2, 2, 2, 213, 214, 3, 2, 2, 2, 214, 216, 3, 2, 2, 2, 215, 213, 3, 2, 2, 2, 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428, 7, 7, 2, 2, 428, 429, 5, 92, 47, 2, 429, 436, 3, 2, 2, 2, 430, 431, 5, 76, 39, 2, 431, 432, 7, 7, 2, 2, 432, 433, 5, 92, 47, 2, 433, 436, 3, 2, 2, 2, 434, 436, 5, 130, 66, 2, 435, 426, 3, 2, 2, 2, 435, 430, 3, 2, 2, 2, 435, 434, 3, 2, 2, 2, 436, 75, 3, 2, 2, 2, 437, 438, 7, 11, 2, 2, 438, 439, 5, 92, 47, 2, 439, 440, 7, 12, 2, 2, 440, 77, 3, 2, 2, 2, 441, 445, 7, 66, 2, 2, 442, 445, 5, 82, 42, 2, 443, 445, 5, 128, 65, 2, 444, 441, 3, 2, 2, 2, 444, 442, 3, 2, 2, 2, 444, 443, 3, 2, 2, 2, 445, 79, 3, 2, 2, 2, 446, 447, 7, 50, 2, 2, 447, 81, 3, 2, 2, 2, 448, 449, 7, 67, 2, 2, 449, 83, 3, 2, 2, 2, 450, 451, 7, 69, 2, 2, 451, 85, 3, 2, 2, 2, 452, 453, 7, 68, 2, 2, 453, 87, 3, 2, 2, 2, 454, 455, 9, 2, 2, 2, 455, 89, 3, 2, 2, 2, 456, 457, 7, 13, 2, 2, 457, 458, 5, 92, 47, 2, 458, 459, 7, 14, 2, 2, 459, 91, 3, 2, 2, 2, 460, 461, 8, 47, 1, 2, 461, 462, 5, 126, 64, 2, 462, 463, 5, 92, 47, 29, 463, 478, 3, 2, 2, 2, 464, 478, 5, 68, 35, 2, 465, 478, 5, 82, 42, 2, 466, 478, 5, 84, 43, 2, 467, 478, 5, 86, 44, 2, 468, 478, 5, 80, 41, 2, 469, 478, 5, 70, 36, 2, 470, 478, 5, 72, 37, 2, 471, 478, 5, 94, 48, 2, 472, 478, 5, 100, 51, 2, 473, 478, 5, 128, 65, 2, 474, 478, 5, 130, 66, 2, 475, 478, 5, 88, 45, 2, 476, 478, 5, 90, 46, 2, 477, 460, 3, 2, 2, 2, 477, 464, 3, 2, 2, 2, 477, 465, 3, 2, 2, 2, 477, 466, 3, 2, 2, 2, 477, 467, 3, 2, 2, 2, 477, 468, 3, 2, 2, 2, 477, 469, 3, 2, 2, 2, 477, 470, 3, 2, 2, 2, 477, 471, 3, 2, 2, 2, 477, 472, 3, 2, 2, 2, 477, 473, 3, 2, 2, 2, 477, 474, 3, 2, 2, 2, 477, 475, 3, 2, 2, 2, 477, 476, 3, 2, 2, 2, 478, 566, 3, 2, 2, 2, 479, 480, 12, 28, 2, 2, 480, 481, 5, 122, 62, 2, 481, 482, 5, 92, 47, 29, 482, 565, 3, 2, 2, 2, 483, 484, 12, 27, 2, 2, 484, 485, 5, 124, 63, 2, 485, 486, 5, 92, 47, 28, 486, 565, 3, 2, 2, 2, 487, 488, 12, 26, 2, 2, 488, 491, 5, 108, 55, 2, 489, 492, 5, 110, 56, 2, 490, 492, 5, 114, 58, 2, 491, 489, 3, 2, 2, 2, 491, 490, 3, 2, 2, 2, 492, 493, 3, 2, 2, 2, 493, 494, 5, 92, 47, 27, 494, 565, 3, 2, 2, 2, 495, 496, 12, 25, 2, 2, 496, 497, 5, 110, 56, 2, 497, 498, 5, 92, 47, 26, 498, 565, 3, 2, 2, 2, 499, 500, 12, 24, 2, 2, 500, 501, 5, 112, 57, 2, 501, 502, 5, 92, 47, 25, 502, 565, 3, 2, 2, 2, 503, 504, 12, 23, 2, 2, 504, 505, 5, 114, 58, 2, 505, 506, 5, 92, 47, 24, 506, 565, 3, 2, 2, 2, 507, 508, 12, 22, 2, 2, 508, 509, 5, 116, 59, 2, 509, 510, 5, 92, 47, 23, 510, 565, 3, 2, 2, 2, 511, 512, 12, 21, 2, 2, 512, 513, 5, 118, 60, 2, 513, 514, 5, 92, 47, 22, 514, 565, 3, 2, 2, 2, 515, 516, 12, 20, 2, 2, 516, 517, 5, 120, 61, 2, 517, 518, 5, 92, 47, 21, 518, 565, 3, 2, 2, 2, 519, 520, 12, 17, 2, 2, 520, 521, 7, 34, 2, 2, 521, 524, 7, 13, 2, 2, 522, 525, 5, 22, 12, 2, 523, 525, 5, 60, 31, 2, 524, 522, 3, 2, 2, 2, 524, 523, 3, 2, 2, 2, 525, 526, 3, 2, 2, 2, 526, 527, 7, 14, 2, 2, 527, 528, 7, 7, 2, 2, 528, 529, 5, 92, 47, 18, 529, 565, 3, 2, 2, 2, 530, 531, 12, 16, 2, 2, 531, 533, 7, 34, 2, 2, 532, 534, 5, 92, 47, 2, 533, 532, 3, 2, 2, 2, 533, 534, 3, 2, 2, 2, 534, 535, 3, 2, 2, 2, 535, 536, 7, 7, 2, 2, 536, 565, 5, 92, 47, 17, 537, 538, 12, 19, 2, 2, 538, 539, 7, 34, 2, 2, 539, 542, 7, 13, 2, 2, 540, 543, 5, 22, 12, 2, 541, 543, 5, 60, 31, 2, 542, 540, 3, 2, 2, 2, 542, 541, 3, 2, 2, 2, 543, 544, 3, 2, 2, 2, 544, 545, 7, 14, 2, 2, 545, 546, 7, 7, 2, 2, 546, 549, 7, 13, 2, 2, 547, 550, 5, 22, 12, 2, 548, 550, 5, 60, 31, 2, 549, 547, 3, 2, 2, 2, 549, 548, 3, 2, 2, 2, 550, 551, 3, 2, 2, 2, 551, 552, 7, 14, 2, 2, 552, 565, 3, 2, 2, 2, 553, 554, 12, 18, 2, 2, 554, 555, 7, 34, 2, 2, 555, 556, 5, 92, 47, 2, 556, 557, 7, 7, 2, 2, 557, 560, 7, 13, 2, 2, 558, 561, 5, 22, 12, 2, 559, 561, 5, 60, 31, 2, 560, 558, 3, 2, 2, 2, 560, 559, 3, 2, 2, 2, 561, 562, 3, 2, 2, 2, 562, 563, 7, 14, 2, 2, 563, 565, 3, 2, 2, 2, 564, 479, 3, 2, 2, 2, 564, 483, 3, 2, 2, 2, 564, 487, 3, 2, 2, 2, 564, 495, 3, 2, 2, 2, 564, 499, 3, 2, 2, 2, 564, 503, 3, 2, 2, 2, 564, 507, 3, 2, 2, 2, 564, 511, 3, 2, 2, 2, 564, 515, 3, 2, 2, 2, 564, 519, 3, 2, 2, 2, 564, 530, 3, 2, 2, 2, 564, 537, 3, 2, 2, 2, 564, 553, 3, 2, 2, 2, 565, 568, 3, 2, 2, 2, 566, 564, 3, 2, 2, 2, 566, 567, 3, 2, 2, 2, 567, 93, 3, 2, 2, 2, 568, 566, 3, 2, 2, 2, 569, 571, 5, 96, 49, 2, 570, 572, 5, 98, 50, 2, 571, 570, 3, 2, 2, 2, 572, 573, 3, 2, 2, 2, 573, 571, 3, 2, 2, 2, 573, 574, 3, 2, 2, 2, 574, 95, 3, 2, 2, 2, 575, 581, 5, 130, 66, 2, 576, 581, 5, 128, 65, 2, 577, 581, 5, 100, 51, 2, 578, 581, 5, 70, 36, 2, 579, 581, 5, 72, 37, 2, 580, 575, 3, 2, 2, 2, 580, 576, 3, 2, 2, 2, 580, 577, 3, 2, 2, 2, 580, 578, 3, 2, 2, 2, 580, 579, 3, 2, 2, 2, 581, 97, 3, 2, 2, 2, 582, 584, 7, 34, 2, 2, 583, 582, 3, 2, 2, 2, 583, 584, 3, 2, 2, 2, 584, 585, 3, 2, 2, 2, 585, 586, 7, 9, 2, 2, 586, 593, 5, 78, 40, 2, 587, 588, 7, 34, 2, 2, 588, 590, 7, 9, 2, 2, 589, 587, 3, 2, 2, 2, 589, 590, 3, 2, 2, 2, 590, 591, 3, 2, 2, 2, 591, 593, 5, 76, 39, 2, 592, 583, 3, 2, 2, 2, 592, 589, 3, 2, 2, 2, 593, 99, 3, 2, 2, 2, 594, 595, 5, 104, 53, 2, 595, 596, 5, 102, 52, 2, 596, 597, 5, 106, 54, 2, 597, 101, 3, 2, 2, 2, 598, 599, 9, 3, 2, 2, 599, 103, 3, 2, 2, 2, 600, 602, 7, 70, 2, 2, 601, 600, 3, 2, 2, 2, 602, 605, 3, 2, 2, 2, 603, 601, 3, 2, 2, 2, 603, 604, 3, 2, 2, 2, 604, 105, 3, 2, 2, 2, 605, 603, 3, 2, 2, 2, 606, 615, 7, 13, 2, 2, 607, 612, 5, 92, 47, 2, 608, 609, 7, 10, 2, 2, 609, 611, 5, 92, 47, 2, 610, 608, 3, 2, 2, 2, 611, 614, 3, 2, 2, 2, 612, 610, 3, 2, 2, 2, 612, 613, 3, 2, 2, 2, 613, 616, 3, 2, 2, 2, 614, 612, 3, 2, 2, 2, 615, 607, 3, 2, 2, 2, 615, 616, 3, 2, 2, 2, 616, 617, 3, 2, 2, 2, 617, 618, 7, 14, 2, 2, 618, 107, 3, 2, 2, 2, 619, 620, 9, 4, 2, 2, 620, 109, 3, 2, 2, 2, 621, 625, 7, 62, 2, 2, 622, 623, 7, 61, 2, 2, 623, 625, 7, 62, 2, 2, 624, 621, 3, 2, 2, 2, 624, 622, 3, 2, 2, 2, 625, 111, 3, 2, 2, 2, 626, 630, 7, 60, 2, 2, 627, 628, 7, 61, 2, 2, 628, 630, 7, 60, 2, 2, 629, 626, 3, 2, 2, 2, 629, 627, 3, 2, 2, 2, 630, 113, 3, 2, 2, 2, 631, 632, 9, 5, 2, 2, 632, 115, 3, 2, 2, 2, 633, 634, 9, 6, 2, 2, 634, 117, 3, 2, 2, 2, 635, 636, 7, 30, 2, 2, 636, 119, 3, 2, 2, 2, 637, 638, 7, 31, 2, 2, 638, 121, 3, 2, 2, 2, 639, 640, 9, 7, 2, 2, 640, 123, 3, 2, 2, 2, 641, 642, 9, 8, 2, 2, 642, 125, 3, 2, 2, 2, 643, 644, 9, 9, 2, 2, 644, 127, 3, 2, 2, 2, 645, 646, 7, 65, 2, 2, 646, 647, 7, 66, 2, 2, 647, 129, 3, 2, 2, 2, 648, 649, 7, 66, 2, 2, 649, 131, 3, 2, 2, 2, 66, 135, 154, 162, 166, 174, 182, 186, 191, 197, 200, 206, 213, 221, 228, 233, 242, 248, 252, 256, 260, 269, 273, 281, 286, 306, 317, 326, 339, 341, 352, 360, 363, 369, 376, 381, 386, 392, 400, 404, 406, 416, 420, 422, 435, 444, 477, 491, 524, 533, 542, 549, 560, 564, 566, 573, 580, 583, 589, 592, 603, 612, 615, 624, 629]
\ No newline at end of file
diff --git a/pkg/parser/fql/fql_parser.go b/pkg/parser/fql/fql_parser.go
index 1c15b6ed..e46d1c2c 100644
--- a/pkg/parser/fql/fql_parser.go
+++ b/pkg/parser/fql/fql_parser.go
@@ -15,7 +15,7 @@ var _ = reflect.Copy
 var _ = strconv.Itoa
 
 var parserATN = []uint16{
-	3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 71, 644,
+	3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 71, 651,
 	4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7,
 	4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13,
 	9, 13, 4, 14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9,
@@ -77,238 +77,241 @@ var parserATN = []uint16{
 	47, 3, 47, 3, 47, 5, 47, 561, 10, 47, 3, 47, 3, 47, 7, 47, 565, 10, 47,
 	12, 47, 14, 47, 568, 11, 47, 3, 48, 3, 48, 6, 48, 572, 10, 48, 13, 48,
 	14, 48, 573, 3, 49, 3, 49, 3, 49, 3, 49, 3, 49, 5, 49, 581, 10, 49, 3,
-	50, 3, 50, 3, 50, 5, 50, 586, 10, 50, 3, 51, 3, 51, 3, 51, 3, 51, 3, 52,
-	3, 52, 3, 53, 7, 53, 595, 10, 53, 12, 53, 14, 53, 598, 11, 53, 3, 54, 3,
-	54, 3, 54, 3, 54, 7, 54, 604, 10, 54, 12, 54, 14, 54, 607, 11, 54, 5, 54,
-	609, 10, 54, 3, 54, 3, 54, 3, 55, 3, 55, 3, 56, 3, 56, 3, 56, 5, 56, 618,
-	10, 56, 3, 57, 3, 57, 3, 57, 5, 57, 623, 10, 57, 3, 58, 3, 58, 3, 59, 3,
-	59, 3, 60, 3, 60, 3, 61, 3, 61, 3, 62, 3, 62, 3, 63, 3, 63, 3, 64, 3, 64,
-	3, 65, 3, 65, 3, 65, 3, 66, 3, 66, 3, 66, 2, 3, 92, 67, 2, 4, 6, 8, 10,
-	12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46,
-	48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82,
-	84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114,
-	116, 118, 120, 122, 124, 126, 128, 130, 2, 10, 3, 2, 48, 49, 6, 2, 30,
-	31, 37, 39, 41, 62, 66, 66, 4, 2, 48, 48, 56, 57, 3, 2, 17, 22, 3, 2, 35,
-	36, 3, 2, 23, 25, 3, 2, 26, 27, 4, 2, 26, 27, 61, 61, 2, 688, 2, 135, 3,
-	2, 2, 2, 4, 141, 3, 2, 2, 2, 6, 143, 3, 2, 2, 2, 8, 145, 3, 2, 2, 2, 10,
-	148, 3, 2, 2, 2, 12, 154, 3, 2, 2, 2, 14, 162, 3, 2, 2, 2, 16, 166, 3,
-	2, 2, 2, 18, 182, 3, 2, 2, 2, 20, 200, 3, 2, 2, 2, 22, 233, 3, 2, 2, 2,
-	24, 242, 3, 2, 2, 2, 26, 248, 3, 2, 2, 2, 28, 252, 3, 2, 2, 2, 30, 256,
-	3, 2, 2, 2, 32, 260, 3, 2, 2, 2, 34, 262, 3, 2, 2, 2, 36, 265, 3, 2, 2,
-	2, 38, 273, 3, 2, 2, 2, 40, 275, 3, 2, 2, 2, 42, 284, 3, 2, 2, 2, 44, 306,
-	3, 2, 2, 2, 46, 308, 3, 2, 2, 2, 48, 312, 3, 2, 2, 2, 50, 320, 3, 2, 2,
-	2, 52, 329, 3, 2, 2, 2, 54, 341, 3, 2, 2, 2, 56, 343, 3, 2, 2, 2, 58, 352,
-	3, 2, 2, 2, 60, 354, 3, 2, 2, 2, 62, 369, 3, 2, 2, 2, 64, 376, 3, 2, 2,
-	2, 66, 381, 3, 2, 2, 2, 68, 386, 3, 2, 2, 2, 70, 394, 3, 2, 2, 2, 72, 410,
-	3, 2, 2, 2, 74, 435, 3, 2, 2, 2, 76, 437, 3, 2, 2, 2, 78, 444, 3, 2, 2,
-	2, 80, 446, 3, 2, 2, 2, 82, 448, 3, 2, 2, 2, 84, 450, 3, 2, 2, 2, 86, 452,
-	3, 2, 2, 2, 88, 454, 3, 2, 2, 2, 90, 456, 3, 2, 2, 2, 92, 477, 3, 2, 2,
-	2, 94, 569, 3, 2, 2, 2, 96, 580, 3, 2, 2, 2, 98, 585, 3, 2, 2, 2, 100,
-	587, 3, 2, 2, 2, 102, 591, 3, 2, 2, 2, 104, 596, 3, 2, 2, 2, 106, 599,
-	3, 2, 2, 2, 108, 612, 3, 2, 2, 2, 110, 617, 3, 2, 2, 2, 112, 622, 3, 2,
-	2, 2, 114, 624, 3, 2, 2, 2, 116, 626, 3, 2, 2, 2, 118, 628, 3, 2, 2, 2,
-	120, 630, 3, 2, 2, 2, 122, 632, 3, 2, 2, 2, 124, 634, 3, 2, 2, 2, 126,
-	636, 3, 2, 2, 2, 128, 638, 3, 2, 2, 2, 130, 641, 3, 2, 2, 2, 132, 134,
-	5, 4, 3, 2, 133, 132, 3, 2, 2, 2, 134, 137, 3, 2, 2, 2, 135, 133, 3, 2,
-	2, 2, 135, 136, 3, 2, 2, 2, 136, 138, 3, 2, 2, 2, 137, 135, 3, 2, 2, 2,
-	138, 139, 5, 12, 7, 2, 139, 140, 7, 2, 2, 3, 140, 3, 3, 2, 2, 2, 141, 142,
-	5, 6, 4, 2, 142, 5, 3, 2, 2, 2, 143, 144, 5, 8, 5, 2, 144, 7, 3, 2, 2,
-	2, 145, 146, 7, 51, 2, 2, 146, 147, 5, 10, 6, 2, 147, 9, 3, 2, 2, 2, 148,
-	149, 5, 104, 53, 2, 149, 150, 7, 66, 2, 2, 150, 11, 3, 2, 2, 2, 151, 153,
-	5, 14, 8, 2, 152, 151, 3, 2, 2, 2, 153, 156, 3, 2, 2, 2, 154, 152, 3, 2,
-	2, 2, 154, 155, 3, 2, 2, 2, 155, 157, 3, 2, 2, 2, 156, 154, 3, 2, 2, 2,
-	157, 158, 5, 16, 9, 2, 158, 13, 3, 2, 2, 2, 159, 163, 5, 18, 10, 2, 160,
-	163, 5, 100, 51, 2, 161, 163, 5, 60, 31, 2, 162, 159, 3, 2, 2, 2, 162,
-	160, 3, 2, 2, 2, 162, 161, 3, 2, 2, 2, 163, 15, 3, 2, 2, 2, 164, 167, 5,
-	20, 11, 2, 165, 167, 5, 22, 12, 2, 166, 164, 3, 2, 2, 2, 166, 165, 3, 2,
-	2, 2, 167, 17, 3, 2, 2, 2, 168, 169, 7, 45, 2, 2, 169, 170, 7, 66, 2, 2,
-	170, 171, 7, 33, 2, 2, 171, 174, 7, 13, 2, 2, 172, 175, 5, 22, 12, 2, 173,
-	175, 5, 60, 31, 2, 174, 172, 3, 2, 2, 2, 174, 173, 3, 2, 2, 2, 175, 176,
-	3, 2, 2, 2, 176, 177, 7, 14, 2, 2, 177, 183, 3, 2, 2, 2, 178, 179, 7, 45,
-	2, 2, 179, 180, 7, 66, 2, 2, 180, 181, 7, 33, 2, 2, 181, 183, 5, 92, 47,
-	2, 182, 168, 3, 2, 2, 2, 182, 178, 3, 2, 2, 2, 183, 19, 3, 2, 2, 2, 184,
-	186, 7, 38, 2, 2, 185, 187, 7, 41, 2, 2, 186, 185, 3, 2, 2, 2, 186, 187,
-	3, 2, 2, 2, 187, 188, 3, 2, 2, 2, 188, 191, 7, 13, 2, 2, 189, 192, 5, 22,
-	12, 2, 190, 192, 5, 60, 31, 2, 191, 189, 3, 2, 2, 2, 191, 190, 3, 2, 2,
-	2, 192, 193, 3, 2, 2, 2, 193, 194, 7, 14, 2, 2, 194, 201, 3, 2, 2, 2, 195,
-	197, 7, 38, 2, 2, 196, 198, 7, 41, 2, 2, 197, 196, 3, 2, 2, 2, 197, 198,
-	3, 2, 2, 2, 198, 199, 3, 2, 2, 2, 199, 201, 5, 92, 47, 2, 200, 184, 3,
-	2, 2, 2, 200, 195, 3, 2, 2, 2, 201, 21, 3, 2, 2, 2, 202, 203, 7, 37, 2,
-	2, 203, 206, 7, 66, 2, 2, 204, 205, 7, 10, 2, 2, 205, 207, 7, 66, 2, 2,
-	206, 204, 3, 2, 2, 2, 206, 207, 3, 2, 2, 2, 207, 208, 3, 2, 2, 2, 208,
-	209, 7, 62, 2, 2, 209, 213, 5, 24, 13, 2, 210, 212, 5, 30, 16, 2, 211,
-	210, 3, 2, 2, 2, 212, 215, 3, 2, 2, 2, 213, 211, 3, 2, 2, 2, 213, 214,
-	3, 2, 2, 2, 214, 216, 3, 2, 2, 2, 215, 213, 3, 2, 2, 2, 216, 217, 5, 32,
-	17, 2, 217, 234, 3, 2, 2, 2, 218, 219, 7, 37, 2, 2, 219, 221, 7, 66, 2,
-	2, 220, 222, 7, 63, 2, 2, 221, 220, 3, 2, 2, 2, 221, 222, 3, 2, 2, 2, 222,
-	223, 3, 2, 2, 2, 223, 224, 7, 64, 2, 2, 224, 228, 5, 92, 47, 2, 225, 227,
-	5, 30, 16, 2, 226, 225, 3, 2, 2, 2, 227, 230, 3, 2, 2, 2, 228, 226, 3,
-	2, 2, 2, 228, 229, 3, 2, 2, 2, 229, 231, 3, 2, 2, 2, 230, 228, 3, 2, 2,
-	2, 231, 232, 5, 32, 17, 2, 232, 234, 3, 2, 2, 2, 233, 202, 3, 2, 2, 2,
-	233, 218, 3, 2, 2, 2, 234, 23, 3, 2, 2, 2, 235, 243, 5, 100, 51, 2, 236,
-	243, 5, 70, 36, 2, 237, 243, 5, 72, 37, 2, 238, 243, 5, 130, 66, 2, 239,
-	243, 5, 94, 48, 2, 240, 243, 5, 68, 35, 2, 241, 243, 5, 128, 65, 2, 242,
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-	2, 2, 243, 25, 3, 2, 2, 2, 244, 249, 5, 36, 19, 2, 245, 249, 5, 40, 21,
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-	248, 245, 3, 2, 2, 2, 248, 246, 3, 2, 2, 2, 248, 247, 3, 2, 2, 2, 249,
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-	608, 617, 622,
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+	612, 610, 3, 2, 2, 2, 612, 613, 3, 2, 2, 2, 613, 616, 3, 2, 2, 2, 614,
+	612, 3, 2, 2, 2, 615, 607, 3, 2, 2, 2, 615, 616, 3, 2, 2, 2, 616, 617,
+	3, 2, 2, 2, 617, 618, 7, 14, 2, 2, 618, 107, 3, 2, 2, 2, 619, 620, 9, 4,
+	2, 2, 620, 109, 3, 2, 2, 2, 621, 625, 7, 62, 2, 2, 622, 623, 7, 61, 2,
+	2, 623, 625, 7, 62, 2, 2, 624, 621, 3, 2, 2, 2, 624, 622, 3, 2, 2, 2, 625,
+	111, 3, 2, 2, 2, 626, 630, 7, 60, 2, 2, 627, 628, 7, 61, 2, 2, 628, 630,
+	7, 60, 2, 2, 629, 626, 3, 2, 2, 2, 629, 627, 3, 2, 2, 2, 630, 113, 3, 2,
+	2, 2, 631, 632, 9, 5, 2, 2, 632, 115, 3, 2, 2, 2, 633, 634, 9, 6, 2, 2,
+	634, 117, 3, 2, 2, 2, 635, 636, 7, 30, 2, 2, 636, 119, 3, 2, 2, 2, 637,
+	638, 7, 31, 2, 2, 638, 121, 3, 2, 2, 2, 639, 640, 9, 7, 2, 2, 640, 123,
+	3, 2, 2, 2, 641, 642, 9, 8, 2, 2, 642, 125, 3, 2, 2, 2, 643, 644, 9, 9,
+	2, 2, 644, 127, 3, 2, 2, 2, 645, 646, 7, 65, 2, 2, 646, 647, 7, 66, 2,
+	2, 647, 129, 3, 2, 2, 2, 648, 649, 7, 66, 2, 2, 649, 131, 3, 2, 2, 2, 66,
+	135, 154, 162, 166, 174, 182, 186, 191, 197, 200, 206, 213, 221, 228, 233,
+	242, 248, 252, 256, 260, 269, 273, 281, 286, 306, 317, 326, 339, 341, 352,
+	360, 363, 369, 376, 381, 386, 392, 400, 404, 406, 416, 420, 422, 435, 444,
+	477, 491, 524, 533, 542, 549, 560, 564, 566, 573, 580, 583, 589, 592, 603,
+	612, 615, 624, 629,
 }
 var literalNames = []string{
 	"", "", "", "", "", "':'", "';'", "'.'", "','", "'['", "']'", "'('", "')'",
@@ -8532,6 +8535,10 @@ func (s *MemberExpressionPathContext) PropertyName() IPropertyNameContext {
 	return t.(IPropertyNameContext)
 }
 
+func (s *MemberExpressionPathContext) QuestionMark() antlr.TerminalNode {
+	return s.GetToken(FqlParserQuestionMark, 0)
+}
+
 func (s *MemberExpressionPathContext) ComputedPropertyName() IComputedPropertyNameContext {
 	var t = s.GetTypedRuleContext(reflect.TypeOf((*IComputedPropertyNameContext)(nil)).Elem(), 0)
 
@@ -8575,6 +8582,7 @@ func (s *MemberExpressionPathContext) Accept(visitor antlr.ParseTreeVisitor) int
 func (p *FqlParser) MemberExpressionPath() (localctx IMemberExpressionPathContext) {
 	localctx = NewMemberExpressionPathContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 96, FqlParserRULE_memberExpressionPath)
+	var _la int
 
 	defer func() {
 		p.ExitRule()
@@ -8592,30 +8600,53 @@ func (p *FqlParser) MemberExpressionPath() (localctx IMemberExpressionPathContex
 		}
 	}()
 
-	p.SetState(583)
+	p.SetState(590)
 	p.GetErrorHandler().Sync(p)
-
-	switch p.GetTokenStream().LA(1) {
-	case FqlParserDot:
+	switch p.GetInterpreter().AdaptivePredict(p.GetTokenStream(), 58, p.GetParserRuleContext()) {
+	case 1:
 		p.EnterOuterAlt(localctx, 1)
+		p.SetState(581)
+		p.GetErrorHandler().Sync(p)
+		_la = p.GetTokenStream().LA(1)
+
+		if _la == FqlParserQuestionMark {
+			{
+				p.SetState(580)
+				p.Match(FqlParserQuestionMark)
+			}
+
+		}
 		{
-			p.SetState(580)
+			p.SetState(583)
 			p.Match(FqlParserDot)
 		}
 		{
-			p.SetState(581)
+			p.SetState(584)
 			p.PropertyName()
 		}
 
-	case FqlParserOpenBracket:
+	case 2:
 		p.EnterOuterAlt(localctx, 2)
+		p.SetState(587)
+		p.GetErrorHandler().Sync(p)
+		_la = p.GetTokenStream().LA(1)
+
+		if _la == FqlParserQuestionMark {
+			{
+				p.SetState(585)
+				p.Match(FqlParserQuestionMark)
+			}
+			{
+				p.SetState(586)
+				p.Match(FqlParserDot)
+			}
+
+		}
 		{
-			p.SetState(582)
+			p.SetState(589)
 			p.ComputedPropertyName()
 		}
 
-	default:
-		panic(antlr.NewNoViableAltException(p, nil, nil, nil, nil, nil))
 	}
 
 	return localctx
@@ -8741,15 +8772,15 @@ func (p *FqlParser) FunctionCallExpression() (localctx IFunctionCallExpressionCo
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(585)
+		p.SetState(592)
 		p.Namespace()
 	}
 	{
-		p.SetState(586)
+		p.SetState(593)
 		p.FunctionIdentifier()
 	}
 	{
-		p.SetState(587)
+		p.SetState(594)
 		p.Arguments()
 	}
 
@@ -8959,7 +8990,7 @@ func (p *FqlParser) FunctionIdentifier() (localctx IFunctionIdentifierContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(589)
+		p.SetState(596)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(_la == FqlParserAnd || _la == FqlParserOr || (((_la-35)&-(0x1f+1)) == 0 && ((1<<uint((_la-35)))&((1<<(FqlParserFor-35))|(1<<(FqlParserReturn-35))|(1<<(FqlParserWaitfor-35))|(1<<(FqlParserDistinct-35))|(1<<(FqlParserFilter-35))|(1<<(FqlParserSort-35))|(1<<(FqlParserLimit-35))|(1<<(FqlParserLet-35))|(1<<(FqlParserCollect-35))|(1<<(FqlParserSortDirection-35))|(1<<(FqlParserNone-35))|(1<<(FqlParserNull-35))|(1<<(FqlParserBooleanLiteral-35))|(1<<(FqlParserUse-35))|(1<<(FqlParserInto-35))|(1<<(FqlParserKeep-35))|(1<<(FqlParserWith-35))|(1<<(FqlParserCount-35))|(1<<(FqlParserAll-35))|(1<<(FqlParserAny-35))|(1<<(FqlParserAggregate-35))|(1<<(FqlParserEvent-35))|(1<<(FqlParserLike-35))|(1<<(FqlParserNot-35))|(1<<(FqlParserIn-35))|(1<<(FqlParserIdentifier-35)))) != 0)) {
@@ -9071,17 +9102,17 @@ func (p *FqlParser) Namespace() (localctx INamespaceContext) {
 	}()
 
 	p.EnterOuterAlt(localctx, 1)
-	p.SetState(594)
+	p.SetState(601)
 	p.GetErrorHandler().Sync(p)
 	_la = p.GetTokenStream().LA(1)
 
 	for _la == FqlParserNamespaceSegment {
 		{
-			p.SetState(591)
+			p.SetState(598)
 			p.Match(FqlParserNamespaceSegment)
 		}
 
-		p.SetState(596)
+		p.SetState(603)
 		p.GetErrorHandler().Sync(p)
 		_la = p.GetTokenStream().LA(1)
 	}
@@ -9219,40 +9250,40 @@ func (p *FqlParser) Arguments() (localctx IArgumentsContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(597)
+		p.SetState(604)
 		p.Match(FqlParserOpenParen)
 	}
-	p.SetState(606)
+	p.SetState(613)
 	p.GetErrorHandler().Sync(p)
 	_la = p.GetTokenStream().LA(1)
 
 	if (((_la-9)&-(0x1f+1)) == 0 && ((1<<uint((_la-9)))&((1<<(FqlParserOpenBracket-9))|(1<<(FqlParserOpenParen-9))|(1<<(FqlParserOpenBrace-9))|(1<<(FqlParserPlus-9))|(1<<(FqlParserMinus-9))|(1<<(FqlParserAnd-9))|(1<<(FqlParserOr-9))|(1<<(FqlParserFor-9))|(1<<(FqlParserReturn-9))|(1<<(FqlParserWaitfor-9))|(1<<(FqlParserDistinct-9))|(1<<(FqlParserFilter-9)))) != 0) || (((_la-41)&-(0x1f+1)) == 0 && ((1<<uint((_la-41)))&((1<<(FqlParserSort-41))|(1<<(FqlParserLimit-41))|(1<<(FqlParserLet-41))|(1<<(FqlParserCollect-41))|(1<<(FqlParserSortDirection-41))|(1<<(FqlParserNone-41))|(1<<(FqlParserNull-41))|(1<<(FqlParserBooleanLiteral-41))|(1<<(FqlParserUse-41))|(1<<(FqlParserInto-41))|(1<<(FqlParserKeep-41))|(1<<(FqlParserWith-41))|(1<<(FqlParserCount-41))|(1<<(FqlParserAll-41))|(1<<(FqlParserAny-41))|(1<<(FqlParserAggregate-41))|(1<<(FqlParserEvent-41))|(1<<(FqlParserLike-41))|(1<<(FqlParserNot-41))|(1<<(FqlParserIn-41))|(1<<(FqlParserParam-41))|(1<<(FqlParserIdentifier-41))|(1<<(FqlParserStringLiteral-41))|(1<<(FqlParserIntegerLiteral-41))|(1<<(FqlParserFloatLiteral-41))|(1<<(FqlParserNamespaceSegment-41)))) != 0) {
 		{
-			p.SetState(598)
+			p.SetState(605)
 			p.expression(0)
 		}
-		p.SetState(603)
+		p.SetState(610)
 		p.GetErrorHandler().Sync(p)
 		_la = p.GetTokenStream().LA(1)
 
 		for _la == FqlParserComma {
 			{
-				p.SetState(599)
+				p.SetState(606)
 				p.Match(FqlParserComma)
 			}
 			{
-				p.SetState(600)
+				p.SetState(607)
 				p.expression(0)
 			}
 
-			p.SetState(605)
+			p.SetState(612)
 			p.GetErrorHandler().Sync(p)
 			_la = p.GetTokenStream().LA(1)
 		}
 
 	}
 	{
-		p.SetState(608)
+		p.SetState(615)
 		p.Match(FqlParserCloseParen)
 	}
 
@@ -9362,7 +9393,7 @@ func (p *FqlParser) ArrayOperator() (localctx IArrayOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(610)
+		p.SetState(617)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(((_la-46)&-(0x1f+1)) == 0 && ((1<<uint((_la-46)))&((1<<(FqlParserNone-46))|(1<<(FqlParserAll-46))|(1<<(FqlParserAny-46)))) != 0) {
@@ -9472,25 +9503,25 @@ func (p *FqlParser) InOperator() (localctx IInOperatorContext) {
 		}
 	}()
 
-	p.SetState(615)
+	p.SetState(622)
 	p.GetErrorHandler().Sync(p)
 
 	switch p.GetTokenStream().LA(1) {
 	case FqlParserIn:
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(612)
+			p.SetState(619)
 			p.Match(FqlParserIn)
 		}
 
 	case FqlParserNot:
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(613)
+			p.SetState(620)
 			p.Match(FqlParserNot)
 		}
 		{
-			p.SetState(614)
+			p.SetState(621)
 			p.Match(FqlParserIn)
 		}
 
@@ -9597,25 +9628,25 @@ func (p *FqlParser) LikeOperator() (localctx ILikeOperatorContext) {
 		}
 	}()
 
-	p.SetState(620)
+	p.SetState(627)
 	p.GetErrorHandler().Sync(p)
 
 	switch p.GetTokenStream().LA(1) {
 	case FqlParserLike:
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(617)
+			p.SetState(624)
 			p.Match(FqlParserLike)
 		}
 
 	case FqlParserNot:
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(618)
+			p.SetState(625)
 			p.Match(FqlParserNot)
 		}
 		{
-			p.SetState(619)
+			p.SetState(626)
 			p.Match(FqlParserLike)
 		}
 
@@ -9741,7 +9772,7 @@ func (p *FqlParser) EqualityOperator() (localctx IEqualityOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(622)
+		p.SetState(629)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(((_la)&-(0x1f+1)) == 0 && ((1<<uint(_la))&((1<<FqlParserGt)|(1<<FqlParserLt)|(1<<FqlParserEq)|(1<<FqlParserGte)|(1<<FqlParserLte)|(1<<FqlParserNeq))) != 0) {
@@ -9854,7 +9885,7 @@ func (p *FqlParser) RegexpOperator() (localctx IRegexpOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(624)
+		p.SetState(631)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(_la == FqlParserRegexNotMatch || _la == FqlParserRegexMatch) {
@@ -9962,7 +9993,7 @@ func (p *FqlParser) LogicalAndOperator() (localctx ILogicalAndOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(626)
+		p.SetState(633)
 		p.Match(FqlParserAnd)
 	}
 
@@ -10063,7 +10094,7 @@ func (p *FqlParser) LogicalOrOperator() (localctx ILogicalOrOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(628)
+		p.SetState(635)
 		p.Match(FqlParserOr)
 	}
 
@@ -10173,7 +10204,7 @@ func (p *FqlParser) MultiplicativeOperator() (localctx IMultiplicativeOperatorCo
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(630)
+		p.SetState(637)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(((_la)&-(0x1f+1)) == 0 && ((1<<uint(_la))&((1<<FqlParserMulti)|(1<<FqlParserDiv)|(1<<FqlParserMod))) != 0) {
@@ -10286,7 +10317,7 @@ func (p *FqlParser) AdditiveOperator() (localctx IAdditiveOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(632)
+		p.SetState(639)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(_la == FqlParserPlus || _la == FqlParserMinus) {
@@ -10403,7 +10434,7 @@ func (p *FqlParser) UnaryOperator() (localctx IUnaryOperatorContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(634)
+		p.SetState(641)
 		_la = p.GetTokenStream().LA(1)
 
 		if !(_la == FqlParserPlus || _la == FqlParserMinus || _la == FqlParserNot) {
@@ -10515,11 +10546,11 @@ func (p *FqlParser) Param() (localctx IParamContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(636)
+		p.SetState(643)
 		p.Match(FqlParserParam)
 	}
 	{
-		p.SetState(637)
+		p.SetState(644)
 		p.Match(FqlParserIdentifier)
 	}
 
@@ -10620,7 +10651,7 @@ func (p *FqlParser) Variable() (localctx IVariableContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(639)
+		p.SetState(646)
 		p.Match(FqlParserIdentifier)
 	}
 
diff --git a/pkg/runtime/expressions/member.go b/pkg/runtime/expressions/member.go
index 6093bc12..281abc2e 100644
--- a/pkg/runtime/expressions/member.go
+++ b/pkg/runtime/expressions/member.go
@@ -10,10 +10,10 @@ import (
 type MemberExpression struct {
 	src    core.SourceMap
 	source core.Expression
-	path   []core.Expression
+	path   []*MemberPathSegment
 }
 
-func NewMemberExpression(src core.SourceMap, source core.Expression, path []core.Expression) (*MemberExpression, error) {
+func NewMemberExpression(src core.SourceMap, source core.Expression, path []*MemberPathSegment) (*MemberExpression, error) {
 	if source == nil {
 		return nil, core.Error(core.ErrMissedArgument, "source")
 	}
@@ -38,8 +38,8 @@ func (e *MemberExpression) Exec(ctx context.Context, scope *core.Scope) (core.Va
 	out := val
 	path := make([]core.Value, 1)
 
-	for _, exp := range e.path {
-		segment, err := exp.Exec(ctx, scope)
+	for _, seg := range e.path {
+		segment, err := seg.exp.Exec(ctx, scope)
 
 		if err != nil {
 			return values.None, err
@@ -49,7 +49,11 @@ func (e *MemberExpression) Exec(ctx context.Context, scope *core.Scope) (core.Va
 		c, err := values.GetIn(ctx, out, path)
 
 		if err != nil {
-			return values.None, core.SourceError(e.src, err)
+			if !seg.optional {
+				return values.None, core.SourceError(e.src, err)
+			}
+
+			return values.None, nil
 		}
 
 		out = c
diff --git a/pkg/runtime/expressions/member_path.go b/pkg/runtime/expressions/member_path.go
new file mode 100644
index 00000000..3d7bea89
--- /dev/null
+++ b/pkg/runtime/expressions/member_path.go
@@ -0,0 +1,16 @@
+package expressions
+
+import "github.com/MontFerret/ferret/pkg/runtime/core"
+
+type MemberPathSegment struct {
+	exp      core.Expression
+	optional bool
+}
+
+func NewMemberPathSegment(source core.Expression, optional bool) (*MemberPathSegment, error) {
+	if source == nil {
+		return nil, core.Error(core.ErrMissedArgument, "source")
+	}
+
+	return &MemberPathSegment{source, optional}, nil
+}
diff --git a/pkg/runtime/values/helpers.go b/pkg/runtime/values/helpers.go
index e577b389..979a1ccf 100644
--- a/pkg/runtime/values/helpers.go
+++ b/pkg/runtime/values/helpers.go
@@ -18,6 +18,7 @@ import (
 // GetIn call from.GetIn method, otherwise return error.
 func GetIn(ctx context.Context, from core.Value, byPath []core.Value) (core.Value, error) {
 	getter, ok := from.(core.Getter)
+
 	if !ok {
 		return None, core.TypeError(
 			from.Type(),