diff --git a/cmd/ast/testdata/case004/output.yaml b/cmd/ast/testdata/case004/output.yaml
index f8e58124..a5c7cb5d 100644
--- a/cmd/ast/testdata/case004/output.yaml
+++ b/cmd/ast/testdata/case004/output.yaml
@@ -1,26 +1,24 @@
 parameters:
-  - assumed: false
-    datatype: int
-    id: ID
-    kind: query
-    name: id
-    required: false
-  - assumed: false
-    datatype: string
-    id: quantity
-    kind: path
-    name: quantity
-    required: true
+    - datatype: int
+      id: ID
+      kind: query
+      name: id
+      required: false
+    - datatype: string
+      id: quantity
+      kind: path
+      name: quantity
+      required: true
 source: |-
-  SELECT *, (
-      SELECT abc
-      FROM T2
-      WHERE 1=2
-  ) as abc FROM T1
-  WHERE 1=1
-  #if($Has.ID)
-  AND ID = $ID
-  #end
-  #if($Has.quantity)
-  AND quantity = $quantity
-  #end
+    SELECT *, (
+        SELECT abc
+        FROM T2
+        WHERE 1=2
+    ) as abc FROM T1
+    WHERE 1=1
+    #if($Has.ID)
+    AND ID = $ID
+    #end
+    #if($Has.quantity)
+    AND quantity = $quantity
+    #end
diff --git a/cmd/ast/testdata/case005/output.yaml b/cmd/ast/testdata/case005/output.yaml
index accf7045..ecc1ff47 100644
--- a/cmd/ast/testdata/case005/output.yaml
+++ b/cmd/ast/testdata/case005/output.yaml
@@ -1,29 +1,28 @@
 parameters:
-  - assumed: false
-    datatype: int
-    id: ID
-    kind: query
-    name: id
-    required: false
-  - assumed: true
-    datatype: string
-    id: quantity
-    kind: query
-    name: quantity
-    required: false
-    typer:
-      columnname: quantity
+    - datatype: int
+      id: ID
+      kind: query
+      name: id
+      required: false
+    - assumed: true
+      datatype: string
+      id: quantity
+      kind: query
+      name: quantity
+      required: false
+      typer:
+        columnname: quantity
 source: |
-  SELECT *, (
-      SELECT abc
-      FROM T2
-      WHERE 1=2
-  ) as abc FROM T1
-  WHERE 1=1
-  #if($Has.ID)
-  AND ID = $ID
-  #end
-  #if($Has.quantity)
-  AND quantity = $quantity
-  AND quantity = $Unsafe.quantity
-  #end
+    SELECT *, (
+        SELECT abc
+        FROM T2
+        WHERE 1=2
+    ) as abc FROM T1
+    WHERE 1=1
+    #if($Has.ID)
+    AND ID = $ID
+    #end
+    #if($Has.quantity)
+    AND quantity = $quantity
+    AND quantity = $Unsafe.quantity
+    #end
diff --git a/cmd/ast/testdata/case006/output.yaml b/cmd/ast/testdata/case006/output.yaml
index 8eaaff05..084e6848 100644
--- a/cmd/ast/testdata/case006/output.yaml
+++ b/cmd/ast/testdata/case006/output.yaml
@@ -1,35 +1,42 @@
 parameters:
-  - assumed: false
-    datatype: int
-    id: ID
-    kind: query
-    name: id
-    required: false
-  - assumed: true
-    datatype: string
-    id: quantity
-    kind: query
-    name: quantity
-    required: false
-    typer:
-      columnname: quantity
+    - datatype: int
+      id: ID
+      kind: query
+      name: id
+      required: false
+    - assumed: true
+      cardinality: Many
+      datatype: string
+      id: Columns
+      kind: query
+      multi: true
+      name: Columns
+      required: false
+    - assumed: true
+      datatype: string
+      id: quantity
+      kind: query
+      name: quantity
+      required: false
+      typer:
+        columnname: quantity
 source: |
-  SELECT *, (
-      SELECT abc
-      FROM T2
-      WHERE 1=2
-  ) as abc FROM T1
-  WHERE 1=1
-  #set($valueSet = 123)
-  #if($Has.ID)
-  AND ID = $ID
-  #end
-  
-  #foreach($column in $Columns)
-      $column.Id
-  #end
-  
-  #if($Has.quantity)
-  AND quantity = $quantity
-  AND quantity = $Unsafe.quantity
-  #end
+    SELECT *, (
+        SELECT abc
+        FROM T2
+        WHERE 1=2
+    ) as abc FROM T1
+    WHERE 1=1
+    #set($valueSet = 123)
+    #if($Has.ID)
+    AND ID = $ID
+    #end
+
+    #foreach($column in $Columns)
+        $column.Id
+    #end
+
+    #if($Has.quantity)
+    AND quantity = $quantity
+    AND quantity = $Unsafe.quantity
+    #end
diff --git a/cmd/ast/testdata/case007/output.yaml b/cmd/ast/testdata/case007/output.yaml
index 85baebb6..c4032ac0 100644
--- a/cmd/ast/testdata/case007/output.yaml
+++ b/cmd/ast/testdata/case007/output.yaml
@@ -1,35 +1,43 @@
 parameters:
-  - assumed: true
-    datatype: string
-    id: ID
-    kind: query
-    name: ID
-    required: false
-  - assumed: true
-    datatype: string
-    id: quantity
-    kind: query
-    name: quantity
-    required: false
-    typer:
-      columnname: quantity
+    - assumed: true
+      datatype: string
+      id: ID
+      kind: query
+      name: ID
+      required: false
+    - assumed: true
+      cardinality: Many
+      datatype: string
+      id: Columns
+      kind: query
+      multi: true
+      name: Columns
+      required: false
+    - assumed: true
+      datatype: string
+      id: quantity
+      kind: query
+      name: quantity
+      required: false
+      typer:
+        columnname: quantity
 source: |
-  SELECT *, (
-      SELECT abc
-      FROM T2
-      WHERE 1=2
-  ) as abc FROM T1
-  WHERE 1=1
-  #set($valueSet = 123)
-  #if($Has.ID)
-  AND ID = 10
-  #end
-  
-  #foreach($column in $Columns)
-      $column.Id
-  #end
-  
-  #if($Has.quantity)
-  AND quantity = $quantity
-  AND quantity = $Unsafe.quantity
-  #end
+    SELECT *, (
+        SELECT abc
+        FROM T2
+        WHERE 1=2
+    ) as abc FROM T1
+    WHERE 1=1
+    #set($valueSet = 123)
+    #if($Has.ID)
+    AND ID = 10
+    #end
+
+    #foreach($column in $Columns)
+        $column.Id
+    #end
+
+    #if($Has.quantity)
+    AND quantity = $quantity
+    AND quantity = $Unsafe.quantity
+    #end
diff --git a/cmd/ast/testdata/case008/output.yaml b/cmd/ast/testdata/case008/output.yaml
index 2683aa8b..e7a47f31 100644
--- a/cmd/ast/testdata/case008/output.yaml
+++ b/cmd/ast/testdata/case008/output.yaml
@@ -1,33 +1,40 @@
 parameters:
-  - assumed: true
-    datatype: string
-    id: ID
-    kind: query
-    name: ID
-    required: false
-  - assumed: false
-    datatype: time.Time
-    id: quantity
-    kind: query
-    name: quantity
-    required: false
+    - assumed: true
+      datatype: string
+      id: ID
+      kind: query
+      name: ID
+      required: false
+    - assumed: true
+      cardinality: Many
+      datatype: string
+      id: Columns
+      kind: query
+      multi: true
+      name: Columns
+      required: false
+    - datatype: time.Time
+      id: quantity
+      kind: query
+      name: quantity
+      required: false
 source: |
-  SELECT *, (
-      SELECT abc
-      FROM T2
-      WHERE 1=2
-  ) as abc FROM T1
-  WHERE 1=1
-  #set($valueSet = 123)
-  #if($Has.ID)
-  AND ID = 10
-  #end
-  
-  #foreach($column in $Columns)
-      $column.Id
-  #end
-  
-  #if($Has.quantity)
-  AND quantity = $quantity /* {"DataType": "time.Time"} */
-  AND quantity = $Unsafe.quantity
-  #end
+    SELECT *, (
+        SELECT abc
+        FROM T2
+        WHERE 1=2
+    ) as abc FROM T1
+    WHERE 1=1
+    #set($valueSet = 123)
+    #if($Has.ID)
+    AND ID = 10
+    #end
+
+    #foreach($column in $Columns)
+        $column.Id
+    #end
+
+    #if($Has.quantity)
+    AND quantity = $quantity /* {"DataType": "time.Time"} */
+    AND quantity = $Unsafe.quantity
+    #end
diff --git a/go.mod b/go.mod
index 3f41b7e1..3cccae6d 100644
--- a/go.mod
+++ b/go.mod
@@ -30,7 +30,7 @@ require (
 	github.com/viant/scy v0.2.1-0.20220812183656-68209588b73e
 	github.com/viant/sqlx v0.0.0-20220811174716-1b6dd6d967a2
 	github.com/viant/toolbox v0.34.6-0.20220630003140-fb2bf82657c1
-	github.com/viant/velty v0.1.1-0.20220810215332-b4095f02bc23
+	github.com/viant/velty v0.1.1-0.20220815170357-0518dfc48b9d
 	github.com/viant/xunsafe v0.8.1-0.20220609224231-1d3e1fcf7bb6
 	golang.org/x/oauth2 v0.0.0-20220608161450-d0670ef3b1eb
 	google.golang.org/api v0.84.0
diff --git a/logger/printer.go b/logger/printer.go
new file mode 100644
index 00000000..1ceea784
--- /dev/null
+++ b/logger/printer.go
@@ -0,0 +1,60 @@
+package logger
+
+import (
+	"fmt"
+	"github.com/viant/velty/est"
+	"github.com/viant/velty/est/op"
+	"github.com/viant/xunsafe"
+	"reflect"
+)
+
+var stringType = reflect.TypeOf("")
+
+type Printer struct {
+}
+
+func (p Printer) Discover(aFunc interface{}) (func(operands []*op.Operand, state *est.State) (interface{}, error), reflect.Type, bool) {
+	switch actual := aFunc.(type) {
+	case func(_ Printer, args ...interface{}) string:
+		return func(operands []*op.Operand, state *est.State) (interface{}, error) {
+			return actual(p, p.asInterfaces(operands, state)), nil
+		}, stringType, true
+
+	case func(_ Printer, message string, args ...interface{}) string:
+		return func(operands []*op.Operand, state *est.State) (interface{}, error) {
+			if len(operands) < 1 {
+				return nil, fmt.Errorf("expected to get 1 or more arguments but got %v", len(operands))
+			}
+
+			format := *(*string)(operands[0].Exec(state))
+			args := p.asInterfaces(operands[1:], state)
+
+			return actual(p, format, args...), nil
+		}, stringType, true
+
+	}
+
+	return nil, nil, false
+}
+
+func (p Printer) asInterfaces(operands []*op.Operand, state *est.State) []interface{} {
+	args := make([]interface{}, len(operands))
+
+	for i, operand := range operands {
+		value := reflect.New(operand.Type).Elem().Interface()
+		xunsafe.Copy(xunsafe.AsPointer(value), operand.Exec(state), int(operand.Type.Size()))
+		args[i] = value
+	}
+
+	return args
+}
+
+func (p Printer) Println(args ...interface{}) string {
+	fmt.Println(args...)
+	return ""
+}
+
+func (p Printer) Printf(format string, args ...interface{}) string {
+	fmt.Printf(format, args...)
+	return ""
+}
diff --git a/view/template.go b/view/template.go
index 14eb2d3a..c7a6de9e 100644
--- a/view/template.go
+++ b/view/template.go
@@ -3,6 +3,7 @@ package view
 import (
 	"context"
 	"fmt"
+	"github.com/viant/datly/logger"
 	"github.com/viant/datly/shared"
 	"github.com/viant/datly/view/keywords"
 	"github.com/viant/datly/view/parameter"
@@ -212,6 +213,10 @@ func NewEvaluator(paramSchema, presenceSchema reflect.Type, template string) (*E
 		return nil, err
 	}
 
+	if err = evaluator.planner.DefineVariable(Logger, reflect.TypeOf(logger.Printer{})); err != nil {
+		return nil, err
+	}
+
 	evaluator.executor, evaluator.stateProvider, err = evaluator.planner.Compile([]byte(template))
 	if err != nil {
 		return nil, err
diff --git a/view/velty.go b/view/velty.go
index 86969eac..51ba75c1 100644
--- a/view/velty.go
+++ b/view/velty.go
@@ -23,6 +23,7 @@ const (
 	SafeFloat  = "Safe_Float"
 
 	Criteria = "criteria"
+	Logger   = "logger"
 )
 
 type Sanitizer struct {