diff --git a/rules/ast/ast.go b/rules/ast/ast.go
index 3f7be901d..d72b8c04a 100644
--- a/rules/ast/ast.go
+++ b/rules/ast/ast.go
@@ -164,9 +164,10 @@ type (
 
 	// A vector aggregation with vector return type.
 	VectorAggregation struct {
-		aggrType AggrType
-		groupBy  clientmodel.LabelNames
-		vector   VectorNode
+		aggrType        AggrType
+		groupBy         clientmodel.LabelNames
+		keepExtraLabels bool
+		vector          VectorNode
 	}
 
 	// An arithmetic expression of vector type.
@@ -367,7 +368,10 @@ func (node *VectorAggregation) Eval(timestamp clientmodel.Timestamp, view *viewA
 	for _, sample := range vector {
 		groupingKey := node.labelsToGroupingKey(sample.Metric)
 		if groupedResult, ok := result[groupingKey]; ok {
-			groupedResult.labels = labelIntersection(groupedResult.labels, sample.Metric)
+			if node.keepExtraLabels {
+				groupedResult.labels = labelIntersection(groupedResult.labels, sample.Metric)
+			}
+
 			switch node.aggrType {
 			case SUM:
 				groupedResult.value += sample.Value
@@ -388,8 +392,17 @@ func (node *VectorAggregation) Eval(timestamp clientmodel.Timestamp, view *viewA
 				panic("Unknown aggregation type")
 			}
 		} else {
+			m := clientmodel.Metric{}
+			if node.keepExtraLabels {
+				m = sample.Metric
+			} else {
+				m[clientmodel.MetricNameLabel] = sample.Metric[clientmodel.MetricNameLabel]
+				for _, l := range node.groupBy {
+					m[l] = sample.Metric[l]
+				}
+			}
 			result[groupingKey] = &groupedAggregation{
-				labels:     sample.Metric,
+				labels:     m,
 				value:      sample.Value,
 				groupCount: 1,
 			}
@@ -644,11 +657,12 @@ func NewVectorLiteral(labels clientmodel.LabelSet) *VectorLiteral {
 	}
 }
 
-func NewVectorAggregation(aggrType AggrType, vector VectorNode, groupBy clientmodel.LabelNames) *VectorAggregation {
+func NewVectorAggregation(aggrType AggrType, vector VectorNode, groupBy clientmodel.LabelNames, keepExtraLabels bool) *VectorAggregation {
 	return &VectorAggregation{
-		aggrType: aggrType,
-		groupBy:  groupBy,
-		vector:   vector,
+		aggrType:        aggrType,
+		groupBy:         groupBy,
+		keepExtraLabels: keepExtraLabels,
+		vector:          vector,
 	}
 }
 
diff --git a/rules/helpers.go b/rules/helpers.go
index 86f3e53ea..0017378e7 100644
--- a/rules/helpers.go
+++ b/rules/helpers.go
@@ -54,7 +54,7 @@ func NewFunctionCall(name string, args []ast.Node) (ast.Node, error) {
 	return functionCall, nil
 }
 
-func NewVectorAggregation(aggrTypeStr string, vector ast.Node, groupBy clientmodel.LabelNames) (*ast.VectorAggregation, error) {
+func NewVectorAggregation(aggrTypeStr string, vector ast.Node, groupBy clientmodel.LabelNames, keepExtraLabels bool) (*ast.VectorAggregation, error) {
 	if _, ok := vector.(ast.VectorNode); !ok {
 		return nil, fmt.Errorf("Operand of %v aggregation must be of vector type", aggrTypeStr)
 	}
@@ -69,7 +69,7 @@ func NewVectorAggregation(aggrTypeStr string, vector ast.Node, groupBy clientmod
 	if !ok {
 		return nil, fmt.Errorf("Unknown aggregation type '%v'", aggrTypeStr)
 	}
-	return ast.NewVectorAggregation(aggrType, vector.(ast.VectorNode), groupBy), nil
+	return ast.NewVectorAggregation(aggrType, vector.(ast.VectorNode), groupBy, keepExtraLabels), nil
 }
 
 func NewArithExpr(opTypeStr string, lhs ast.Node, rhs ast.Node) (ast.Node, error) {
diff --git a/rules/lexer.l b/rules/lexer.l
index 4a22066f7..c289bd765 100644
--- a/rules/lexer.l
+++ b/rules/lexer.l
@@ -78,6 +78,7 @@ DESCRIPTION|description  return DESCRIPTION
 
 PERMANENT|permanent      return PERMANENT
 BY|by                    return GROUP_OP
+KEEPING_EXTRA|keeping_extra return KEEPING_EXTRA
 AVG|SUM|MAX|MIN|COUNT    lval.str = lexer.token(); return AGGR_OP
 avg|sum|max|min|count    lval.str = strings.ToUpper(lexer.token()); return AGGR_OP
 \<|>|AND|OR|and|or       lval.str = strings.ToUpper(lexer.token()); return CMP_OP
diff --git a/rules/lexer.l.go b/rules/lexer.l.go
index 60f03e778..af880e6ad 100644
--- a/rules/lexer.l.go
+++ b/rules/lexer.l.go
@@ -58,7 +58,7 @@ panic(fmt.Errorf(`invalid start condition %d`, yyt))
 case 0: // start condition: INITIAL
 goto yystart1
 case 1: // start condition: S_COMMENTS
-goto yystart127
+goto yystart152
 }
 
 goto yystate1 // silence unused label error
@@ -82,7 +82,7 @@ case c == '-':
 goto yystate14
 case c == '/':
 goto yystate17
-case c == ':' || c == 'E' || c == 'G' || c == 'H' || c >= 'J' && c <= 'L' || c == 'N' || c == 'Q' || c == 'R' || c >= 'T' && c <= 'V' || c >= 'X' && c <= 'Z' || c == '_' || c == 'e' || c == 'g' || c == 'h' || c >= 'j' && c <= 'l' || c == 'n' || c == 'q' || c == 'r' || c >= 't' && c <= 'v' || c >= 'x' && c <= 'z':
+case c == ':' || c == 'E' || c == 'G' || c == 'H' || c == 'J' || c == 'L' || c == 'N' || c == 'Q' || c == 'R' || c >= 'T' && c <= 'V' || c >= 'X' && c <= 'Z' || c == '_' || c == 'e' || c == 'g' || c == 'h' || c == 'j' || c == 'l' || c == 'n' || c == 'q' || c == 'r' || c >= 't' && c <= 'v' || c >= 'x' && c <= 'z':
 goto yystate23
 case c == '<' || c == '>':
 goto yystate24
@@ -100,49 +100,53 @@ case c == 'F':
 goto yystate52
 case c == 'I':
 goto yystate55
-case c == 'M':
+case c == 'K':
 goto yystate57
-case c == 'O':
-goto yystate60
-case c == 'P':
-goto yystate61
-case c == 'S':
+case c == 'M':
 goto yystate70
+case c == 'O':
+goto yystate73
+case c == 'P':
+goto yystate74
+case c == 'S':
+goto yystate83
 case c == 'W':
-goto yystate77
+goto yystate90
 case c == '\'':
 goto yystate9
 case c == '\t' || c == '\n' || c == '\r' || c == ' ':
 goto yystate2
 case c == 'a':
-goto yystate81
+goto yystate94
 case c == 'b':
-goto yystate88
+goto yystate101
 case c == 'c':
-goto yystate89
+goto yystate102
 case c == 'd':
-goto yystate93
-case c == 'f':
-goto yystate103
-case c == 'i':
-goto yystate105
-case c == 'm':
 goto yystate106
-case c == 'o':
-goto yystate109
-case c == 'p':
-goto yystate110
-case c == 's':
+case c == 'f':
+goto yystate116
+case c == 'i':
 goto yystate118
+case c == 'k':
+goto yystate119
+case c == 'm':
+goto yystate131
+case c == 'o':
+goto yystate134
+case c == 'p':
+goto yystate135
+case c == 's':
+goto yystate143
 case c == 'w':
-goto yystate124
+goto yystate149
 case c >= '0' && c <= '9':
 goto yystate21
 }
 
 yystate2:
 c = lexer.getChar()
-goto yyrule25
+goto yyrule26
 
 yystate3:
 c = lexer.getChar()
@@ -155,7 +159,7 @@ goto yystate4
 
 yystate4:
 c = lexer.getChar()
-goto yyrule16
+goto yyrule17
 
 yystate5:
 c = lexer.getChar()
@@ -172,7 +176,7 @@ goto yystate5
 
 yystate6:
 c = lexer.getChar()
-goto yyrule22
+goto yyrule23
 
 yystate7:
 c = lexer.getChar()
@@ -185,7 +189,7 @@ goto yystate5
 
 yystate8:
 c = lexer.getChar()
-goto yyrule18
+goto yyrule19
 
 yystate9:
 c = lexer.getChar()
@@ -202,7 +206,7 @@ goto yystate9
 
 yystate10:
 c = lexer.getChar()
-goto yyrule23
+goto yyrule24
 
 yystate11:
 c = lexer.getChar()
@@ -215,17 +219,17 @@ goto yystate9
 
 yystate12:
 c = lexer.getChar()
-goto yyrule24
+goto yyrule25
 
 yystate13:
 c = lexer.getChar()
-goto yyrule17
+goto yyrule18
 
 yystate14:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule17
+goto yyrule18
 case c >= '0' && c <= '9':
 goto yystate15
 }
@@ -234,7 +238,7 @@ yystate15:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule21
+goto yyrule22
 case c == '.':
 goto yystate16
 case c >= '0' && c <= '9':
@@ -245,7 +249,7 @@ yystate16:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule21
+goto yyrule22
 case c >= '0' && c <= '9':
 goto yystate16
 }
@@ -254,7 +258,7 @@ yystate17:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule18
+goto yyrule19
 case c == '*':
 goto yystate18
 case c == '/':
@@ -284,7 +288,7 @@ yystate21:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule21
+goto yyrule22
 case c == '.':
 goto yystate16
 case c == 'd' || c == 'h' || c == 'm' || c == 's' || c == 'w' || c == 'y':
@@ -295,13 +299,13 @@ goto yystate21
 
 yystate22:
 c = lexer.getChar()
-goto yyrule19
+goto yyrule20
 
 yystate23:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
@@ -310,7 +314,7 @@ yystate24:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule15
+goto yyrule16
 case c == '=':
 goto yystate4
 }
@@ -319,7 +323,7 @@ yystate25:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule24
+goto yyrule25
 case c == '=':
 goto yystate4
 }
@@ -328,7 +332,7 @@ yystate26:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'L':
 goto yystate27
 case c == 'N':
@@ -343,7 +347,7 @@ yystate27:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'E':
 goto yystate28
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -354,7 +358,7 @@ yystate28:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'R':
 goto yystate29
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -365,7 +369,7 @@ yystate29:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'T':
 goto yystate30
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -385,7 +389,7 @@ yystate31:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'D':
 goto yystate32
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'C' || c >= 'E' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -396,7 +400,7 @@ yystate32:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule15
+goto yyrule16
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
@@ -405,7 +409,7 @@ yystate33:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'G':
 goto yystate34
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'F' || c >= 'H' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -416,7 +420,7 @@ yystate34:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule13
+goto yyrule14
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
@@ -425,7 +429,7 @@ yystate35:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'Y':
 goto yystate36
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'X' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -445,7 +449,7 @@ yystate37:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'O':
 goto yystate38
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'N' || c >= 'P' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -456,7 +460,7 @@ yystate38:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'U':
 goto yystate39
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'T' || c >= 'V' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -467,7 +471,7 @@ yystate39:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'N':
 goto yystate40
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -478,7 +482,7 @@ yystate40:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'T':
 goto yystate34
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -489,7 +493,7 @@ yystate41:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'E':
 goto yystate42
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -500,7 +504,7 @@ yystate42:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'S':
 goto yystate43
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'R' || c >= 'T' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -511,7 +515,7 @@ yystate43:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'C':
 goto yystate44
 case c >= '0' && c <= ':' || c == 'A' || c == 'B' || c >= 'D' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -522,7 +526,7 @@ yystate44:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'R':
 goto yystate45
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -533,7 +537,7 @@ yystate45:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'I':
 goto yystate46
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -544,7 +548,7 @@ yystate46:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'P':
 goto yystate47
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'O' || c >= 'Q' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -555,7 +559,7 @@ yystate47:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'T':
 goto yystate48
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -566,7 +570,7 @@ yystate48:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'I':
 goto yystate49
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -577,7 +581,7 @@ yystate49:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'O':
 goto yystate50
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'N' || c >= 'P' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -588,7 +592,7 @@ yystate50:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'N':
 goto yystate51
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -608,7 +612,7 @@ yystate52:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'O':
 goto yystate53
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'N' || c >= 'P' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -619,7 +623,7 @@ yystate53:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'R':
 goto yystate54
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -639,7 +643,7 @@ yystate55:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'F':
 goto yystate56
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'E' || c >= 'G' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
@@ -659,12 +663,10 @@ yystate57:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'A':
+goto yyrule21
+case c == 'E':
 goto yystate58
-case c == 'I':
-goto yystate59
-case c >= '0' && c <= ':' || c >= 'B' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -672,10 +674,10 @@ yystate58:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'X':
-goto yystate34
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'W' || c == 'Y' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'E':
+goto yystate59
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -683,10 +685,10 @@ yystate59:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'N':
-goto yystate34
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'P':
+goto yystate60
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'O' || c >= 'Q' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -694,10 +696,10 @@ yystate60:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'R':
-goto yystate32
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'I':
+goto yystate61
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -705,10 +707,10 @@ yystate61:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'E':
+goto yyrule21
+case c == 'N':
 goto yystate62
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -716,10 +718,10 @@ yystate62:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'R':
+goto yyrule21
+case c == 'G':
 goto yystate63
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'F' || c >= 'H' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -727,10 +729,10 @@ yystate63:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'M':
+goto yyrule21
+case c == '_':
 goto yystate64
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -738,10 +740,10 @@ yystate64:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'A':
+goto yyrule21
+case c == 'E':
 goto yystate65
-case c >= '0' && c <= ':' || c >= 'B' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -749,10 +751,10 @@ yystate65:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'N':
+goto yyrule21
+case c == 'X':
 goto yystate66
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'W' || c == 'Y' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -760,10 +762,10 @@ yystate66:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'E':
+goto yyrule21
+case c == 'T':
 goto yystate67
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -771,10 +773,10 @@ yystate67:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'N':
+goto yyrule21
+case c == 'R':
 goto yystate68
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -782,10 +784,10 @@ yystate68:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'T':
+goto yyrule21
+case c == 'A':
 goto yystate69
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'B' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -793,7 +795,7 @@ yystate69:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule11
+goto yyrule13
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
@@ -802,10 +804,12 @@ yystate70:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'U':
+goto yyrule21
+case c == 'A':
 goto yystate71
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'T' || c >= 'V' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c == 'I':
+goto yystate72
+case c >= '0' && c <= ':' || c >= 'B' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -813,10 +817,10 @@ yystate71:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'M':
-goto yystate72
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'X':
+goto yystate34
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'W' || c == 'Y' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -824,10 +828,10 @@ yystate72:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule13
-case c == 'M':
-goto yystate73
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'N':
+goto yystate34
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -835,10 +839,10 @@ yystate73:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'A':
-goto yystate74
-case c >= '0' && c <= ':' || c >= 'B' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yyrule21
+case c == 'R':
+goto yystate32
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -846,10 +850,10 @@ yystate74:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'R':
+goto yyrule21
+case c == 'E':
 goto yystate75
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -857,10 +861,10 @@ yystate75:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'Y':
+goto yyrule21
+case c == 'R':
 goto yystate76
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'X' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -868,45 +872,186 @@ yystate76:
 c = lexer.getChar()
 switch {
 default:
+goto yyrule21
+case c == 'M':
+goto yystate77
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate77:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'A':
+goto yystate78
+case c >= '0' && c <= ':' || c >= 'B' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate78:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'N':
+goto yystate79
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate79:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'E':
+goto yystate80
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'D' || c >= 'F' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate80:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'N':
+goto yystate81
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'M' || c >= 'O' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate81:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'T':
+goto yystate82
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate82:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule11
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate83:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'U':
+goto yystate84
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'T' || c >= 'V' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate84:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'M':
+goto yystate85
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate85:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule14
+case c == 'M':
+goto yystate86
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'L' || c >= 'N' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate86:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'A':
+goto yystate87
+case c >= '0' && c <= ':' || c >= 'B' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate87:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'R':
+goto yystate88
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Q' || c >= 'S' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate88:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'Y':
+goto yystate89
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'X' || c == 'Z' || c == '_' || c >= 'a' && c <= 'z':
+goto yystate23
+}
+
+yystate89:
+c = lexer.getChar()
+switch {
+default:
 goto yyrule9
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
-yystate77:
+yystate90:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'I':
-goto yystate78
+goto yystate91
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'H' || c >= 'J' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
-yystate78:
+yystate91:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'T':
-goto yystate79
+goto yystate92
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'S' || c >= 'U' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
-yystate79:
+yystate92:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'H':
-goto yystate80
+goto yystate93
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'G' || c >= 'I' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
-yystate80:
+yystate93:
 c = lexer.getChar()
 switch {
 default:
@@ -915,159 +1060,18 @@ case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <
 goto yystate23
 }
 
-yystate81:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'l':
-goto yystate82
-case c == 'n':
-goto yystate85
-case c == 'v':
-goto yystate86
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'k' || c == 'm' || c >= 'o' && c <= 'u' || c >= 'w' && c <= 'z':
-goto yystate23
-}
-
-yystate82:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'e':
-goto yystate83
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
-goto yystate23
-}
-
-yystate83:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'r':
-goto yystate84
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
-goto yystate23
-}
-
-yystate84:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 't':
-goto yystate30
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
-goto yystate23
-}
-
-yystate85:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'd':
-goto yystate32
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'c' || c >= 'e' && c <= 'z':
-goto yystate23
-}
-
-yystate86:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'g':
-goto yystate87
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'f' || c >= 'h' && c <= 'z':
-goto yystate23
-}
-
-yystate87:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule14
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
-goto yystate23
-}
-
-yystate88:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'y':
-goto yystate36
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'x' || c == 'z':
-goto yystate23
-}
-
-yystate89:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'o':
-goto yystate90
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
-goto yystate23
-}
-
-yystate90:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'u':
-goto yystate91
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 't' || c >= 'v' && c <= 'z':
-goto yystate23
-}
-
-yystate91:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'n':
-goto yystate92
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
-goto yystate23
-}
-
-yystate92:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 't':
-goto yystate87
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
-goto yystate23
-}
-
-yystate93:
-c = lexer.getChar()
-switch {
-default:
-goto yyrule20
-case c == 'e':
-goto yystate94
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
-goto yystate23
-}
-
 yystate94:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 's':
+goto yyrule21
+case c == 'l':
 goto yystate95
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'r' || c >= 't' && c <= 'z':
+case c == 'n':
+goto yystate98
+case c == 'v':
+goto yystate99
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'k' || c == 'm' || c >= 'o' && c <= 'u' || c >= 'w' && c <= 'z':
 goto yystate23
 }
 
@@ -1075,10 +1079,10 @@ yystate95:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'c':
+goto yyrule21
+case c == 'e':
 goto yystate96
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c == 'a' || c == 'b' || c >= 'd' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
 goto yystate23
 }
 
@@ -1086,7 +1090,7 @@ yystate96:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'r':
 goto yystate97
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
@@ -1097,10 +1101,10 @@ yystate97:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'i':
-goto yystate98
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
+goto yyrule21
+case c == 't':
+goto yystate30
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
 goto yystate23
 }
 
@@ -1108,10 +1112,10 @@ yystate98:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'p':
-goto yystate99
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'o' || c >= 'q' && c <= 'z':
+goto yyrule21
+case c == 'd':
+goto yystate32
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'c' || c >= 'e' && c <= 'z':
 goto yystate23
 }
 
@@ -1119,10 +1123,10 @@ yystate99:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 't':
+goto yyrule21
+case c == 'g':
 goto yystate100
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'f' || c >= 'h' && c <= 'z':
 goto yystate23
 }
 
@@ -1130,10 +1134,8 @@ yystate100:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'i':
-goto yystate101
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
+goto yyrule15
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -1141,10 +1143,10 @@ yystate101:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'o':
-goto yystate102
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
+goto yyrule21
+case c == 'y':
+goto yystate36
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'x' || c == 'z':
 goto yystate23
 }
 
@@ -1152,10 +1154,10 @@ yystate102:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'n':
-goto yystate51
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+goto yyrule21
+case c == 'o':
+goto yystate103
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
 goto yystate23
 }
 
@@ -1163,10 +1165,10 @@ yystate103:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'o':
+goto yyrule21
+case c == 'u':
 goto yystate104
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 't' || c >= 'v' && c <= 'z':
 goto yystate23
 }
 
@@ -1174,10 +1176,10 @@ yystate104:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'r':
-goto yystate54
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+goto yyrule21
+case c == 'n':
+goto yystate105
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
 goto yystate23
 }
 
@@ -1185,10 +1187,10 @@ yystate105:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'f':
-goto yystate56
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'e' || c >= 'g' && c <= 'z':
+goto yyrule21
+case c == 't':
+goto yystate100
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
 goto yystate23
 }
 
@@ -1196,12 +1198,10 @@ yystate106:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'a':
+goto yyrule21
+case c == 'e':
 goto yystate107
-case c == 'i':
-goto yystate108
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'h' || c >= 'j' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
 goto yystate23
 }
 
@@ -1209,10 +1209,10 @@ yystate107:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'x':
-goto yystate87
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'w' || c == 'y' || c == 'z':
+goto yyrule21
+case c == 's':
+goto yystate108
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'r' || c >= 't' && c <= 'z':
 goto yystate23
 }
 
@@ -1220,10 +1220,10 @@ yystate108:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'n':
-goto yystate87
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+goto yyrule21
+case c == 'c':
+goto yystate109
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c == 'a' || c == 'b' || c >= 'd' && c <= 'z':
 goto yystate23
 }
 
@@ -1231,9 +1231,9 @@ yystate109:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
+goto yyrule21
 case c == 'r':
-goto yystate32
+goto yystate110
 case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
 goto yystate23
 }
@@ -1242,10 +1242,10 @@ yystate110:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'e':
+goto yyrule21
+case c == 'i':
 goto yystate111
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
 goto yystate23
 }
 
@@ -1253,10 +1253,10 @@ yystate111:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'r':
+goto yyrule21
+case c == 'p':
 goto yystate112
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'o' || c >= 'q' && c <= 'z':
 goto yystate23
 }
 
@@ -1264,10 +1264,10 @@ yystate112:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'm':
+goto yyrule21
+case c == 't':
 goto yystate113
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
 goto yystate23
 }
 
@@ -1275,10 +1275,10 @@ yystate113:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'a':
+goto yyrule21
+case c == 'i':
 goto yystate114
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
 goto yystate23
 }
 
@@ -1286,10 +1286,10 @@ yystate114:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'n':
+goto yyrule21
+case c == 'o':
 goto yystate115
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
 goto yystate23
 }
 
@@ -1297,10 +1297,10 @@ yystate115:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'e':
-goto yystate116
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
+goto yyrule21
+case c == 'n':
+goto yystate51
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
 goto yystate23
 }
 
@@ -1308,10 +1308,10 @@ yystate116:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'n':
+goto yyrule21
+case c == 'o':
 goto yystate117
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'n' || c >= 'p' && c <= 'z':
 goto yystate23
 }
 
@@ -1319,10 +1319,10 @@ yystate117:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 't':
-goto yystate69
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+goto yyrule21
+case c == 'r':
+goto yystate54
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
 goto yystate23
 }
 
@@ -1330,10 +1330,10 @@ yystate118:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'u':
-goto yystate119
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 't' || c >= 'v' && c <= 'z':
+goto yyrule21
+case c == 'f':
+goto yystate56
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'e' || c >= 'g' && c <= 'z':
 goto yystate23
 }
 
@@ -1341,10 +1341,10 @@ yystate119:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'm':
+goto yyrule21
+case c == 'e':
 goto yystate120
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
 goto yystate23
 }
 
@@ -1352,10 +1352,10 @@ yystate120:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule14
-case c == 'm':
+goto yyrule21
+case c == 'e':
 goto yystate121
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
 goto yystate23
 }
 
@@ -1363,10 +1363,10 @@ yystate121:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'a':
+goto yyrule21
+case c == 'p':
 goto yystate122
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'o' || c >= 'q' && c <= 'z':
 goto yystate23
 }
 
@@ -1374,10 +1374,10 @@ yystate122:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'r':
+goto yyrule21
+case c == 'i':
 goto yystate123
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
 goto yystate23
 }
 
@@ -1385,10 +1385,10 @@ yystate123:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'y':
-goto yystate76
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'x' || c == 'z':
+goto yyrule21
+case c == 'n':
+goto yystate124
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
 goto yystate23
 }
 
@@ -1396,10 +1396,10 @@ yystate124:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'i':
+goto yyrule21
+case c == 'g':
 goto yystate125
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'f' || c >= 'h' && c <= 'z':
 goto yystate23
 }
 
@@ -1407,10 +1407,10 @@ yystate125:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 't':
+goto yyrule21
+case c == '_':
 goto yystate126
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z':
 goto yystate23
 }
 
@@ -1418,41 +1418,318 @@ yystate126:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule20
-case c == 'h':
-goto yystate80
-case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'g' || c >= 'i' && c <= 'z':
+goto yyrule21
+case c == 'e':
+goto yystate127
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
 goto yystate23
 }
 
-goto yystate127 // silence unused label error
 yystate127:
 c = lexer.getChar()
-yystart127:
 switch {
 default:
-goto yyabort
-case c == '*':
-goto yystate129
-case c >= '\x01' && c <= ')' || c >= '+' && c <= 'ÿ':
+goto yyrule21
+case c == 'x':
 goto yystate128
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'w' || c == 'y' || c == 'z':
+goto yystate23
 }
 
 yystate128:
 c = lexer.getChar()
-goto yyrule3
+switch {
+default:
+goto yyrule21
+case c == 't':
+goto yystate129
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+goto yystate23
+}
 
 yystate129:
 c = lexer.getChar()
 switch {
 default:
-goto yyrule3
-case c == '/':
+goto yyrule21
+case c == 'r':
 goto yystate130
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+goto yystate23
 }
 
 yystate130:
 c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'a':
+goto yystate69
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'z':
+goto yystate23
+}
+
+yystate131:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'a':
+goto yystate132
+case c == 'i':
+goto yystate133
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'h' || c >= 'j' && c <= 'z':
+goto yystate23
+}
+
+yystate132:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'x':
+goto yystate100
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'w' || c == 'y' || c == 'z':
+goto yystate23
+}
+
+yystate133:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'n':
+goto yystate100
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+goto yystate23
+}
+
+yystate134:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'r':
+goto yystate32
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+goto yystate23
+}
+
+yystate135:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'e':
+goto yystate136
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
+goto yystate23
+}
+
+yystate136:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'r':
+goto yystate137
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+goto yystate23
+}
+
+yystate137:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'm':
+goto yystate138
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+goto yystate23
+}
+
+yystate138:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'a':
+goto yystate139
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'z':
+goto yystate23
+}
+
+yystate139:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'n':
+goto yystate140
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+goto yystate23
+}
+
+yystate140:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'e':
+goto yystate141
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'd' || c >= 'f' && c <= 'z':
+goto yystate23
+}
+
+yystate141:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'n':
+goto yystate142
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'm' || c >= 'o' && c <= 'z':
+goto yystate23
+}
+
+yystate142:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 't':
+goto yystate82
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+goto yystate23
+}
+
+yystate143:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'u':
+goto yystate144
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 't' || c >= 'v' && c <= 'z':
+goto yystate23
+}
+
+yystate144:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'm':
+goto yystate145
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+goto yystate23
+}
+
+yystate145:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule15
+case c == 'm':
+goto yystate146
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'l' || c >= 'n' && c <= 'z':
+goto yystate23
+}
+
+yystate146:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'a':
+goto yystate147
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'b' && c <= 'z':
+goto yystate23
+}
+
+yystate147:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'r':
+goto yystate148
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'q' || c >= 's' && c <= 'z':
+goto yystate23
+}
+
+yystate148:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'y':
+goto yystate89
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'x' || c == 'z':
+goto yystate23
+}
+
+yystate149:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'i':
+goto yystate150
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'h' || c >= 'j' && c <= 'z':
+goto yystate23
+}
+
+yystate150:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 't':
+goto yystate151
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 's' || c >= 'u' && c <= 'z':
+goto yystate23
+}
+
+yystate151:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule21
+case c == 'h':
+goto yystate93
+case c >= '0' && c <= ':' || c >= 'A' && c <= 'Z' || c == '_' || c >= 'a' && c <= 'g' || c >= 'i' && c <= 'z':
+goto yystate23
+}
+
+goto yystate152 // silence unused label error
+yystate152:
+c = lexer.getChar()
+yystart152:
+switch {
+default:
+goto yyabort
+case c == '*':
+goto yystate154
+case c >= '\x01' && c <= ')' || c >= '+' && c <= 'ÿ':
+goto yystate153
+}
+
+yystate153:
+c = lexer.getChar()
+goto yyrule3
+
+yystate154:
+c = lexer.getChar()
+switch {
+default:
+goto yyrule3
+case c == '/':
+goto yystate155
+}
+
+yystate155:
+c = lexer.getChar()
 goto yyrule2
 
 yyrule1: // "/*"
@@ -1507,47 +1784,51 @@ yyrule12: // BY|by
 {
                    return GROUP_OP
 }
-yyrule13: // AVG|SUM|MAX|MIN|COUNT
+yyrule13: // KEEPING_EXTRA|keeping_extra
+{
+return KEEPING_EXTRA
+}
+yyrule14: // AVG|SUM|MAX|MIN|COUNT
 {
    lval.str = lexer.token(); return AGGR_OP
 goto yystate0
 }
-yyrule14: // avg|sum|max|min|count
+yyrule15: // avg|sum|max|min|count
 {
    lval.str = strings.ToUpper(lexer.token()); return AGGR_OP
 goto yystate0
 }
-yyrule15: // \<|>|AND|OR|and|or
+yyrule16: // \<|>|AND|OR|and|or
 {
       lval.str = strings.ToUpper(lexer.token()); return CMP_OP
 goto yystate0
 }
-yyrule16: // ==|!=|>=|<=
+yyrule17: // ==|!=|>=|<=
 {
              lval.str = lexer.token(); return CMP_OP
 goto yystate0
 }
-yyrule17: // [+\-]
+yyrule18: // [+\-]
 {
                    lval.str = lexer.token(); return ADDITIVE_OP
 goto yystate0
 }
-yyrule18: // [*/%]
+yyrule19: // [*/%]
 {
                    lval.str = lexer.token(); return MULT_OP
 goto yystate0
 }
-yyrule19: // {D}+{U}
+yyrule20: // {D}+{U}
 {
                  lval.str = lexer.token(); return DURATION
 goto yystate0
 }
-yyrule20: // {L}({L}|{D})*
+yyrule21: // {L}({L}|{D})*
 {
            lval.str = lexer.token(); return IDENTIFIER
 goto yystate0
 }
-yyrule21: // \-?{D}+(\.{D}*)?
+yyrule22: // \-?{D}+(\.{D}*)?
 {
         num, err := strconv.ParseFloat(lexer.token(), 64);
                          if (err != nil && err.(*strconv.NumError).Err == strconv.ErrSyntax) {
@@ -1556,21 +1837,21 @@ yyrule21: // \-?{D}+(\.{D}*)?
                          lval.num = clientmodel.SampleValue(num)
                          return NUMBER
 }
-yyrule22: // \"(\\.|[^\\"])*\"
+yyrule23: // \"(\\.|[^\\"])*\"
 {
        lval.str = lexer.token()[1:len(lexer.token()) - 1]; return STRING
 goto yystate0
 }
-yyrule23: // \'(\\.|[^\\'])*\'
+yyrule24: // \'(\\.|[^\\'])*\'
 {
        lval.str = lexer.token()[1:len(lexer.token()) - 1]; return STRING
 goto yystate0
 }
-yyrule24: // [{}\[\]()=,]
+yyrule25: // [{}\[\]()=,]
 {
             return int(lexer.buf[0])
 }
-yyrule25: // [\t\n\r ]
+yyrule26: // [\t\n\r ]
 {
                /* gobble up any whitespace */
 goto yystate0
diff --git a/rules/parser.y b/rules/parser.y
index 2e265f706..0591ea589 100644
--- a/rules/parser.y
+++ b/rules/parser.y
@@ -39,7 +39,7 @@
 
 %token <str> IDENTIFIER STRING DURATION
 %token <num> NUMBER
-%token PERMANENT GROUP_OP
+%token PERMANENT GROUP_OP KEEPING_EXTRA
 %token <str> AGGR_OP CMP_OP ADDITIVE_OP MULT_OP
 %token ALERT IF FOR WITH SUMMARY DESCRIPTION
 
@@ -47,7 +47,7 @@
 %type <labelNameSlice> label_list grouping_opts
 %type <labelSet> label_assign label_assign_list rule_labels
 %type <ruleNode> rule_expr func_arg
-%type <boolean> qualifier
+%type <boolean> qualifier extra_labels_opts
 %type <str> for_duration
 
 %right '='
@@ -135,10 +135,10 @@ rule_expr          : '(' rule_expr ')'
                        $$, err = NewMatrix($1, $3)
                        if err != nil { yylex.Error(err.Error()); return 1 }
                      }
-                   | AGGR_OP '(' rule_expr ')' grouping_opts
+                   | AGGR_OP '(' rule_expr ')' grouping_opts extra_labels_opts
                      {
                        var err error
-                       $$, err = NewVectorAggregation($1, $3, $5)
+                       $$, err = NewVectorAggregation($1, $3, $5, $6)
                        if err != nil { yylex.Error(err.Error()); return 1 }
                      }
                    /* Yacc can only attach associativity to terminals, so we
@@ -165,6 +165,12 @@ rule_expr          : '(' rule_expr ')'
                      { $$ = ast.NewScalarLiteral($1)}
                    ;
 
+extra_labels_opts  :
+                     { $$ = false }
+                   | KEEPING_EXTRA
+                     { $$ = true }
+                   ;
+
 grouping_opts      :
                      { $$ = clientmodel.LabelNames{} }
                    | GROUP_OP '(' label_list ')'
diff --git a/rules/parser.y.go b/rules/parser.y.go
index d33cb7941..58cb028f3 100644
--- a/rules/parser.y.go
+++ b/rules/parser.y.go
@@ -30,16 +30,17 @@ const DURATION = 57350
 const NUMBER = 57351
 const PERMANENT = 57352
 const GROUP_OP = 57353
-const AGGR_OP = 57354
-const CMP_OP = 57355
-const ADDITIVE_OP = 57356
-const MULT_OP = 57357
-const ALERT = 57358
-const IF = 57359
-const FOR = 57360
-const WITH = 57361
-const SUMMARY = 57362
-const DESCRIPTION = 57363
+const KEEPING_EXTRA = 57354
+const AGGR_OP = 57355
+const CMP_OP = 57356
+const ADDITIVE_OP = 57357
+const MULT_OP = 57358
+const ALERT = 57359
+const IF = 57360
+const FOR = 57361
+const WITH = 57362
+const SUMMARY = 57363
+const DESCRIPTION = 57364
 
 var yyToknames = []string{
 	"START_RULES",
@@ -50,6 +51,7 @@ var yyToknames = []string{
 	"NUMBER",
 	"PERMANENT",
 	"GROUP_OP",
+	"KEEPING_EXTRA",
 	"AGGR_OP",
 	"CMP_OP",
 	"ADDITIVE_OP",
@@ -68,7 +70,7 @@ const yyEofCode = 1
 const yyErrCode = 2
 const yyMaxDepth = 200
 
-//line parser.y:191
+//line parser.y:197
 
 
 //line yacctab:1
@@ -81,79 +83,79 @@ var yyExca = []int{
 	-2, 1,
 }
 
-const yyNprod = 36
+const yyNprod = 38
 const yyPrivate = 57344
 
 var yyTokenNames []string
 var yyStates []string
 
-const yyLast = 101
+const yyLast = 103
 
 var yyAct = []int{
 
-	20, 38, 34, 43, 33, 17, 6, 18, 16, 17,
-	19, 15, 59, 18, 16, 17, 16, 17, 15, 27,
-	28, 29, 15, 60, 23, 41, 40, 49, 15, 22,
-	15, 8, 35, 67, 10, 66, 45, 9, 44, 50,
-	18, 16, 17, 46, 47, 51, 18, 16, 17, 53,
-	52, 7, 32, 57, 30, 15, 39, 8, 35, 48,
-	10, 15, 65, 9, 8, 22, 71, 10, 21, 68,
-	9, 61, 42, 14, 37, 56, 62, 7, 26, 13,
-	72, 70, 54, 69, 7, 64, 39, 25, 24, 2,
-	3, 11, 5, 4, 1, 58, 12, 36, 55, 63,
-	31,
+	20, 38, 34, 17, 33, 43, 6, 18, 16, 17,
+	19, 15, 59, 18, 16, 17, 15, 62, 23, 27,
+	28, 29, 15, 46, 47, 41, 40, 49, 15, 22,
+	8, 35, 69, 10, 68, 50, 45, 9, 44, 39,
+	18, 16, 17, 48, 73, 51, 18, 16, 17, 53,
+	52, 7, 32, 57, 30, 15, 8, 35, 37, 10,
+	70, 15, 8, 9, 67, 10, 16, 17, 22, 9,
+	61, 21, 63, 42, 14, 64, 56, 7, 26, 74,
+	15, 13, 72, 7, 54, 71, 66, 39, 25, 24,
+	2, 3, 11, 5, 4, 1, 58, 60, 12, 36,
+	55, 65, 31,
 }
 var yyPact = []int{
 
-	85, -1000, -1000, 58, 63, -1000, 33, 58, 42, -2,
-	-1000, -1000, 82, 81, -1000, 70, 58, 58, 58, 27,
-	-1000, 25, 50, 58, 6, 55, -26, -10, -17, 2,
-	-1000, 11, -1000, -1000, 33, -1000, 19, -1000, -1000, 37,
-	0, 17, 58, -1000, -1000, 51, -1000, 80, 75, 64,
-	58, -6, -1000, -1000, -1000, -1000, -3, 33, 52, 68,
-	79, 6, -1000, 8, -1000, 49, -1000, 77, 74, -1000,
-	45, 73, -1000,
+	86, -1000, -1000, 56, 64, -1000, 32, 56, 44, -9,
+	-1000, -1000, 83, 82, -1000, 70, 56, 56, 56, 26,
+	-1000, 24, 33, 56, 5, 55, -25, -13, -18, 51,
+	-1000, 10, -1000, -1000, 32, -1000, -2, -1000, -1000, 20,
+	-1, 12, 56, -1000, -1000, 50, -1000, 81, 77, 65,
+	56, -7, -1000, -1000, -1000, 58, -10, 32, 52, 67,
+	-1000, -1000, 80, 5, -1000, 6, -1000, 39, -1000, 79,
+	75, -1000, 22, 72, -1000,
 }
 var yyPgo = []int{
 
-	0, 100, 99, 98, 1, 97, 0, 2, 4, 96,
-	95, 94, 93, 92, 91,
+	0, 102, 101, 100, 1, 99, 0, 2, 4, 98,
+	97, 96, 95, 94, 93, 92,
 }
 var yyR1 = []int{
 
-	0, 11, 11, 12, 12, 13, 14, 14, 10, 10,
+	0, 12, 12, 13, 13, 14, 15, 15, 11, 11,
 	9, 9, 6, 6, 6, 5, 5, 4, 7, 7,
-	7, 7, 7, 7, 7, 7, 7, 7, 3, 3,
-	2, 2, 1, 1, 8, 8,
+	7, 7, 7, 7, 7, 7, 7, 7, 10, 10,
+	3, 3, 2, 2, 1, 1, 8, 8,
 }
 var yyR2 = []int{
 
 	0, 2, 2, 0, 2, 1, 5, 11, 0, 2,
 	0, 1, 0, 3, 2, 1, 3, 3, 3, 2,
-	4, 3, 4, 5, 3, 3, 3, 1, 0, 4,
-	1, 3, 1, 3, 1, 1,
+	4, 3, 4, 6, 3, 3, 3, 1, 0, 1,
+	0, 4, 1, 3, 1, 3, 1, 1,
 }
 var yyChk = []int{
 
-	-1000, -11, 4, 5, -12, -13, -7, 26, 6, 12,
-	9, -14, -9, 16, 10, 28, 14, 15, 13, -7,
-	-6, 26, 23, 26, 6, 6, 8, -7, -7, -7,
-	27, -1, 27, -8, -7, 7, -5, 24, -4, 6,
-	-7, -6, 17, 29, 27, 25, 24, 25, 22, 27,
-	22, -7, -8, -4, 7, -3, 11, -7, -10, 18,
-	26, 19, 8, -2, 6, -6, 27, 25, 20, 6,
-	7, 21, 7,
+	-1000, -12, 4, 5, -13, -14, -7, 27, 6, 13,
+	9, -15, -9, 17, 10, 29, 15, 16, 14, -7,
+	-6, 27, 24, 27, 6, 6, 8, -7, -7, -7,
+	28, -1, 28, -8, -7, 7, -5, 25, -4, 6,
+	-7, -6, 18, 30, 28, 26, 25, 26, 23, 28,
+	23, -7, -8, -4, 7, -3, 11, -7, -11, 19,
+	-10, 12, 27, 20, 8, -2, 6, -6, 28, 26,
+	21, 6, 7, 22, 7,
 }
 var yyDef = []int{
 
 	0, -2, 3, 0, -2, 2, 5, 0, 12, 0,
 	27, 4, 0, 0, 11, 0, 0, 0, 0, 0,
 	19, 0, 0, 0, 12, 0, 0, 24, 25, 26,
-	18, 0, 21, 32, 34, 35, 0, 14, 15, 0,
-	0, 0, 0, 22, 20, 0, 13, 0, 0, 28,
-	0, 8, 33, 16, 17, 23, 0, 6, 0, 0,
-	0, 12, 9, 0, 30, 0, 29, 0, 0, 31,
-	0, 0, 7,
+	18, 0, 21, 34, 36, 37, 0, 14, 15, 0,
+	0, 0, 0, 22, 20, 0, 13, 0, 0, 30,
+	0, 8, 35, 16, 17, 28, 0, 6, 0, 0,
+	23, 29, 0, 12, 9, 0, 32, 0, 31, 0,
+	0, 33, 0, 0, 7,
 }
 var yyTok1 = []int{
 
@@ -161,20 +163,21 @@ var yyTok1 = []int{
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-	26, 27, 3, 3, 25, 3, 3, 3, 3, 3,
+	27, 28, 3, 3, 26, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-	3, 22, 3, 3, 3, 3, 3, 3, 3, 3,
+	3, 23, 3, 3, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-	3, 28, 3, 29, 3, 3, 3, 3, 3, 3,
+	3, 29, 3, 30, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-	3, 3, 3, 23, 3, 24,
+	3, 3, 3, 24, 3, 25,
 }
 var yyTok2 = []int{
 
 	2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
 	12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
+	22,
 }
 var yyTok3 = []int{
 	0,
@@ -483,7 +486,7 @@ yydefault:
 		//line parser.y:139
 		{
 	                       var err error
-	                       yyVAL.ruleNode, err = NewVectorAggregation(yyS[yypt-4].str, yyS[yypt-2].ruleNode, yyS[yypt-0].labelNameSlice)
+	                       yyVAL.ruleNode, err = NewVectorAggregation(yyS[yypt-5].str, yyS[yypt-3].ruleNode, yyS[yypt-1].labelNameSlice, yyS[yypt-0].boolean)
 	                       if err != nil { yylex.Error(err.Error()); return 1 }
 	                     }
 	case 24:
@@ -512,27 +515,33 @@ yydefault:
 		{ yyVAL.ruleNode = ast.NewScalarLiteral(yyS[yypt-0].num)}
 	case 28:
 		//line parser.y:169
-		{ yyVAL.labelNameSlice = clientmodel.LabelNames{} }
+		{ yyVAL.boolean = false }
 	case 29:
 		//line parser.y:171
-		{ yyVAL.labelNameSlice = yyS[yypt-1].labelNameSlice }
+		{ yyVAL.boolean = true }
 	case 30:
 		//line parser.y:175
-		{ yyVAL.labelNameSlice = clientmodel.LabelNames{clientmodel.LabelName(yyS[yypt-0].str)} }
+		{ yyVAL.labelNameSlice = clientmodel.LabelNames{} }
 	case 31:
 		//line parser.y:177
-		{ yyVAL.labelNameSlice = append(yyVAL.labelNameSlice, clientmodel.LabelName(yyS[yypt-0].str)) }
+		{ yyVAL.labelNameSlice = yyS[yypt-1].labelNameSlice }
 	case 32:
 		//line parser.y:181
-		{ yyVAL.ruleNodeSlice = []ast.Node{yyS[yypt-0].ruleNode} }
+		{ yyVAL.labelNameSlice = clientmodel.LabelNames{clientmodel.LabelName(yyS[yypt-0].str)} }
 	case 33:
 		//line parser.y:183
-		{ yyVAL.ruleNodeSlice = append(yyVAL.ruleNodeSlice, yyS[yypt-0].ruleNode) }
+		{ yyVAL.labelNameSlice = append(yyVAL.labelNameSlice, clientmodel.LabelName(yyS[yypt-0].str)) }
 	case 34:
 		//line parser.y:187
-		{ yyVAL.ruleNode = yyS[yypt-0].ruleNode }
+		{ yyVAL.ruleNodeSlice = []ast.Node{yyS[yypt-0].ruleNode} }
 	case 35:
 		//line parser.y:189
+		{ yyVAL.ruleNodeSlice = append(yyVAL.ruleNodeSlice, yyS[yypt-0].ruleNode) }
+	case 36:
+		//line parser.y:193
+		{ yyVAL.ruleNode = yyS[yypt-0].ruleNode }
+	case 37:
+		//line parser.y:195
 		{ yyVAL.ruleNode = ast.NewStringLiteral(yyS[yypt-0].str) }
 	}
 	goto yystack /* stack new state and value */
diff --git a/rules/rules_test.go b/rules/rules_test.go
index dad7b8b7b..57ec793d3 100644
--- a/rules/rules_test.go
+++ b/rules/rules_test.go
@@ -115,6 +115,22 @@ func TestExpressions(t *testing.T) {
 			output:         []string{`http_requests => 3600 @[%v]`},
 			fullRanges:     0,
 			intervalRanges: 8,
+		}, {
+			expr: `SUM(http_requests{instance="0"}) BY(job)`,
+			output: []string{
+				`http_requests{job="api-server"} => 400 @[%v]`,
+				`http_requests{job="app-server"} => 1200 @[%v]`,
+			},
+			fullRanges:     0,
+			intervalRanges: 4,
+		}, {
+			expr: `SUM(http_requests{instance="0"}) BY(job) KEEPING_EXTRA`,
+			output: []string{
+				`http_requests{instance="0", job="api-server"} => 400 @[%v]`,
+				`http_requests{instance="0", job="app-server"} => 1200 @[%v]`,
+			},
+			fullRanges:     0,
+			intervalRanges: 4,
 		}, {
 			expr: `SUM(http_requests) BY (job)`,
 			output: []string{