core: vm: sqlvm: ast: use pointer receivers

Since all nodes must be declared as pointers to satisfy the interface,
it is no longer meaningful to use value receivers. It should make the
code look more consistent and reduce the amount of memory copying
during function calls because these structs takes at least 8 bytes.

1 files changed, 89 insertions, 89 deletions

diff --git a/core/vm/sqlvm/ast/ast.go b/core/vm/sqlvm/ast/ast.go
index ca0f60aa7..505f8653f 100644
--- a/core/vm/sqlvm/ast/ast.go
+++ b/core/vm/sqlvm/ast/ast.go
@@ -25,7 +25,7 @@ type NodeBase struct {
 }
 
 // GetPosition returns the offset in bytes where the corresponding token starts.
-func (n NodeBase) GetPosition() uint32 {
+func (n *NodeBase) GetPosition() uint32 {
 	return n.Position
 }
 
@@ -35,7 +35,7 @@ func (n *NodeBase) SetPosition(position uint32) {
 }
 
 // GetLength returns the length in bytes of the corresponding token.
-func (n NodeBase) GetLength() uint32 {
+func (n *NodeBase) GetLength() uint32 {
 	return n.Length
 }
 
@@ -76,7 +76,7 @@ type TaggedExprNodeBase struct {
 }
 
 // GetType gets the data type of the node.
-func (n TaggedExprNodeBase) GetType() DataType {
+func (n *TaggedExprNodeBase) GetType() DataType {
 	return n.Type
 }
 
@@ -94,12 +94,12 @@ type IdentifierNode struct {
 var _ ExprNode = (*IdentifierNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n IdentifierNode) GetChildren() []Node {
+func (n *IdentifierNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n IdentifierNode) IsConstant() bool {
+func (n *IdentifierNode) IsConstant() bool {
 	return false
 }
 
@@ -121,22 +121,22 @@ type BoolValueNode struct {
 var _ ExprNode = (*BoolValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n BoolValueNode) GetChildren() []Node {
+func (n *BoolValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n BoolValueNode) IsConstant() bool {
+func (n *BoolValueNode) IsConstant() bool {
 	return true
 }
 
 // GetType returns the type of 'bool'.
-func (n BoolValueNode) GetType() DataType {
+func (n *BoolValueNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
 // Value returns the value of BoolValueNode.
-func (n BoolValueNode) Value() interface{} {
+func (n *BoolValueNode) Value() interface{} {
 	return n.V
 }
 
@@ -150,17 +150,17 @@ type IntegerValueNode struct {
 var _ ExprNode = (*IntegerValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n IntegerValueNode) GetChildren() []Node {
+func (n *IntegerValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n IntegerValueNode) IsConstant() bool {
+func (n *IntegerValueNode) IsConstant() bool {
 	return true
 }
 
 // Value returns the value of IntegerValueNode.
-func (n IntegerValueNode) Value() interface{} {
+func (n *IntegerValueNode) Value() interface{} {
 	return n.V
 }
 
@@ -173,17 +173,17 @@ type DecimalValueNode struct {
 var _ ExprNode = (*DecimalValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n DecimalValueNode) GetChildren() []Node {
+func (n *DecimalValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n DecimalValueNode) IsConstant() bool {
+func (n *DecimalValueNode) IsConstant() bool {
 	return true
 }
 
 // Value returns the value of DecimalValueNode.
-func (n DecimalValueNode) Value() interface{} {
+func (n *DecimalValueNode) Value() interface{} {
 	return n.V
 }
 
@@ -196,17 +196,17 @@ type BytesValueNode struct {
 var _ ExprNode = (*BytesValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n BytesValueNode) GetChildren() []Node {
+func (n *BytesValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n BytesValueNode) IsConstant() bool {
+func (n *BytesValueNode) IsConstant() bool {
 	return true
 }
 
 // Value returns the value of BytesValueNode.
-func (n BytesValueNode) Value() interface{} {
+func (n *BytesValueNode) Value() interface{} {
 	return n.V
 }
 
@@ -218,22 +218,22 @@ type AnyValueNode struct {
 var _ ExprNode = (*AnyValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n AnyValueNode) GetChildren() []Node {
+func (n *AnyValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n AnyValueNode) IsConstant() bool {
+func (n *AnyValueNode) IsConstant() bool {
 	return false
 }
 
 // GetType returns the type of '*'.
-func (n AnyValueNode) GetType() DataType {
+func (n *AnyValueNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorSpecial, DataTypeMinorSpecialAny)
 }
 
 // Value returns itself.
-func (n AnyValueNode) Value() interface{} {
+func (n *AnyValueNode) Value() interface{} {
 	return n
 }
 
@@ -245,22 +245,22 @@ type DefaultValueNode struct {
 var _ ExprNode = (*DefaultValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n DefaultValueNode) GetChildren() []Node {
+func (n *DefaultValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n DefaultValueNode) IsConstant() bool {
+func (n *DefaultValueNode) IsConstant() bool {
 	return true
 }
 
 // GetType returns the type of 'DEFAULT'.
-func (n DefaultValueNode) GetType() DataType {
+func (n *DefaultValueNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorSpecial, DataTypeMinorSpecialDefault)
 }
 
 // Value returns itself.
-func (n DefaultValueNode) Value() interface{} {
+func (n *DefaultValueNode) Value() interface{} {
 	return n
 }
 
@@ -272,17 +272,17 @@ type NullValueNode struct {
 var _ ExprNode = (*NullValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n NullValueNode) GetChildren() []Node {
+func (n *NullValueNode) GetChildren() []Node {
 	return nil
 }
 
 // IsConstant returns whether a node is a constant.
-func (n NullValueNode) IsConstant() bool {
+func (n *NullValueNode) IsConstant() bool {
 	return true
 }
 
 // Value returns itself.
-func (n NullValueNode) Value() interface{} { return n }
+func (n *NullValueNode) Value() interface{} { return n }
 
 // ---------------------------------------------------------------------------
 // Types
@@ -304,12 +304,12 @@ type IntTypeNode struct {
 var _ TypeNode = (*IntTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n IntTypeNode) GetChildren() []Node {
+func (n *IntTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n IntTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *IntTypeNode) GetType() (DataType, errors.ErrorCode) {
 	if n.Size%8 != 0 || n.Size == 0 || n.Size > 256 {
 		if n.Unsigned {
 			return DataTypeUnknown, errors.ErrorCodeInvalidUintSize
@@ -338,12 +338,12 @@ type FixedTypeNode struct {
 var _ TypeNode = (*FixedTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n FixedTypeNode) GetChildren() []Node {
+func (n *FixedTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n FixedTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *FixedTypeNode) GetType() (DataType, errors.ErrorCode) {
 	if n.Size%8 != 0 || n.Size == 0 || n.Size > 256 {
 		if n.Unsigned {
 			return DataTypeUnknown, errors.ErrorCodeInvalidUfixedSize
@@ -376,12 +376,12 @@ type DynamicBytesTypeNode struct {
 var _ TypeNode = (*DynamicBytesTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n DynamicBytesTypeNode) GetChildren() []Node {
+func (n *DynamicBytesTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n DynamicBytesTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *DynamicBytesTypeNode) GetType() (DataType, errors.ErrorCode) {
 	return ComposeDataType(DataTypeMajorDynamicBytes, DataTypeMinorDontCare),
 		errors.ErrorCodeNil
 }
@@ -395,12 +395,12 @@ type FixedBytesTypeNode struct {
 var _ TypeNode = (*FixedBytesTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n FixedBytesTypeNode) GetChildren() []Node {
+func (n *FixedBytesTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n FixedBytesTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *FixedBytesTypeNode) GetType() (DataType, errors.ErrorCode) {
 	if n.Size == 0 || n.Size > 32 {
 		return DataTypeUnknown, errors.ErrorCodeInvalidBytesSize
 	}
@@ -417,12 +417,12 @@ type AddressTypeNode struct {
 var _ TypeNode = (*AddressTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n AddressTypeNode) GetChildren() []Node {
+func (n *AddressTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n AddressTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *AddressTypeNode) GetType() (DataType, errors.ErrorCode) {
 	return ComposeDataType(DataTypeMajorAddress, DataTypeMinorDontCare),
 		errors.ErrorCodeNil
 }
@@ -435,12 +435,12 @@ type BoolTypeNode struct {
 var _ TypeNode = (*BoolTypeNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n BoolTypeNode) GetChildren() []Node {
+func (n *BoolTypeNode) GetChildren() []Node {
 	return nil
 }
 
 // GetType returns the type represented by the node.
-func (n BoolTypeNode) GetType() (DataType, errors.ErrorCode) {
+func (n *BoolTypeNode) GetType() (DataType, errors.ErrorCode) {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare),
 		errors.ErrorCodeNil
 }
@@ -471,17 +471,17 @@ type UnaryOperatorNode struct {
 }
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n UnaryOperatorNode) GetChildren() []Node {
+func (n *UnaryOperatorNode) GetChildren() []Node {
 	return []Node{n.Target}
 }
 
 // IsConstant returns whether a node is a constant.
-func (n UnaryOperatorNode) IsConstant() bool {
+func (n *UnaryOperatorNode) IsConstant() bool {
 	return n.Target.IsConstant()
 }
 
 // GetTarget gets the target of the operation.
-func (n UnaryOperatorNode) GetTarget() ExprNode {
+func (n *UnaryOperatorNode) GetTarget() ExprNode {
 	return n.Target
 }
 
@@ -497,22 +497,22 @@ type BinaryOperatorNode struct {
 }
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n BinaryOperatorNode) GetChildren() []Node {
+func (n *BinaryOperatorNode) GetChildren() []Node {
 	return []Node{n.Object, n.Subject}
 }
 
 // IsConstant returns whether a node is a constant.
-func (n BinaryOperatorNode) IsConstant() bool {
+func (n *BinaryOperatorNode) IsConstant() bool {
 	return n.Object.IsConstant() && n.Subject.IsConstant()
 }
 
 // GetObject gets the node on which the operation is applied.
-func (n BinaryOperatorNode) GetObject() ExprNode {
+func (n *BinaryOperatorNode) GetObject() ExprNode {
 	return n.Object
 }
 
 // GetSubject gets the node whose value is applied on the object.
-func (n BinaryOperatorNode) GetSubject() ExprNode {
+func (n *BinaryOperatorNode) GetSubject() ExprNode {
 	return n.Subject
 }
 
@@ -551,7 +551,7 @@ type NotOperatorNode struct {
 var _ UnaryOperator = (*NotOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n NotOperatorNode) GetType() DataType {
+func (n *NotOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -564,7 +564,7 @@ type AndOperatorNode struct {
 var _ BinaryOperator = (*AndOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n AndOperatorNode) GetType() DataType {
+func (n *AndOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -577,7 +577,7 @@ type OrOperatorNode struct {
 var _ BinaryOperator = (*OrOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n OrOperatorNode) GetType() DataType {
+func (n *OrOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -590,7 +590,7 @@ type GreaterOrEqualOperatorNode struct {
 var _ BinaryOperator = (*GreaterOrEqualOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n GreaterOrEqualOperatorNode) GetType() DataType {
+func (n *GreaterOrEqualOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -603,7 +603,7 @@ type LessOrEqualOperatorNode struct {
 var _ BinaryOperator = (*LessOrEqualOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n LessOrEqualOperatorNode) GetType() DataType {
+func (n *LessOrEqualOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -616,7 +616,7 @@ type NotEqualOperatorNode struct {
 var _ BinaryOperator = (*NotEqualOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n NotEqualOperatorNode) GetType() DataType {
+func (n *NotEqualOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -629,7 +629,7 @@ type EqualOperatorNode struct {
 var _ BinaryOperator = (*EqualOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n EqualOperatorNode) GetType() DataType {
+func (n *EqualOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -642,7 +642,7 @@ type GreaterOperatorNode struct {
 var _ BinaryOperator = (*GreaterOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n GreaterOperatorNode) GetType() DataType {
+func (n *GreaterOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -655,7 +655,7 @@ type LessOperatorNode struct {
 var _ BinaryOperator = (*LessOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n LessOperatorNode) GetType() DataType {
+func (n *LessOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -668,7 +668,7 @@ type ConcatOperatorNode struct {
 var _ BinaryOperator = (*ConcatOperatorNode)(nil)
 
 // GetType returns the type of 'bytes'.
-func (n ConcatOperatorNode) GetType() DataType {
+func (n *ConcatOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorDynamicBytes, DataTypeMinorDontCare)
 }
 
@@ -721,7 +721,7 @@ type IsOperatorNode struct {
 var _ BinaryOperator = (*IsOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n IsOperatorNode) GetType() DataType {
+func (n *IsOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -734,7 +734,7 @@ type LikeOperatorNode struct {
 var _ BinaryOperator = (*LikeOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n LikeOperatorNode) GetType() DataType {
+func (n *LikeOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
@@ -752,17 +752,17 @@ type CastOperatorNode struct {
 var _ ExprNode = (*CastOperatorNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n CastOperatorNode) GetChildren() []Node {
+func (n *CastOperatorNode) GetChildren() []Node {
 	return []Node{n.SourceExpr, n.TargetType}
 }
 
 // IsConstant returns whether a node is a constant.
-func (n CastOperatorNode) IsConstant() bool {
+func (n *CastOperatorNode) IsConstant() bool {
 	return n.SourceExpr.IsConstant()
 }
 
 // GetType returns the type of CAST expression, which is always the target type.
-func (n CastOperatorNode) GetType() DataType {
+func (n *CastOperatorNode) GetType() DataType {
 	if dt, code := n.TargetType.GetType(); code == errors.ErrorCodeNil {
 		return dt
 	}
@@ -783,7 +783,7 @@ type AssignOperatorNode struct {
 var _ Node = (*AssignOperatorNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n AssignOperatorNode) GetChildren() []Node {
+func (n *AssignOperatorNode) GetChildren() []Node {
 	return []Node{n.Column, n.Expr}
 }
 
@@ -801,12 +801,12 @@ type InOperatorNode struct {
 var _ ExprNode = (*InOperatorNode)(nil)
 
 // GetType returns the type of 'bool'.
-func (n InOperatorNode) GetType() DataType {
+func (n *InOperatorNode) GetType() DataType {
 	return ComposeDataType(DataTypeMajorBool, DataTypeMinorDontCare)
 }
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n InOperatorNode) GetChildren() []Node {
+func (n *InOperatorNode) GetChildren() []Node {
 	nodes := make([]Node, 1+len(n.Right))
 	nodes[0] = n.Left
 	for i := 0; i < len(n.Right); i++ {
@@ -816,7 +816,7 @@ func (n InOperatorNode) GetChildren() []Node {
 }
 
 // IsConstant returns whether a node is a constant.
-func (n InOperatorNode) IsConstant() bool {
+func (n *InOperatorNode) IsConstant() bool {
 	if !n.Left.IsConstant() {
 		return false
 	}
@@ -842,7 +842,7 @@ type FunctionOperatorNode struct {
 var _ ExprNode = (*FunctionOperatorNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n FunctionOperatorNode) GetChildren() []Node {
+func (n *FunctionOperatorNode) GetChildren() []Node {
 	nodes := make([]Node, 1+len(n.Args))
 	nodes[0] = n.Name
 	for i := 0; i < len(n.Args); i++ {
@@ -852,7 +852,7 @@ func (n FunctionOperatorNode) GetChildren() []Node {
 }
 
 // IsConstant returns whether a node is a constant.
-func (n FunctionOperatorNode) IsConstant() bool {
+func (n *FunctionOperatorNode) IsConstant() bool {
 	return false
 }
 
@@ -869,7 +869,7 @@ type WhereOptionNode struct {
 var _ Node = (*WhereOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n WhereOptionNode) GetChildren() []Node {
+func (n *WhereOptionNode) GetChildren() []Node {
 	return []Node{n.Condition}
 }
 
@@ -884,7 +884,7 @@ type OrderOptionNode struct {
 var _ Node = (*OrderOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n OrderOptionNode) GetChildren() []Node {
+func (n *OrderOptionNode) GetChildren() []Node {
 	return []Node{n.Expr}
 }
 
@@ -897,7 +897,7 @@ type GroupOptionNode struct {
 var _ Node = (*GroupOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n GroupOptionNode) GetChildren() []Node {
+func (n *GroupOptionNode) GetChildren() []Node {
 	return []Node{n.Expr}
 }
 
@@ -910,7 +910,7 @@ type OffsetOptionNode struct {
 var _ Node = (*OffsetOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n OffsetOptionNode) GetChildren() []Node {
+func (n *OffsetOptionNode) GetChildren() []Node {
 	return []Node{n.Value}
 }
 
@@ -923,7 +923,7 @@ type LimitOptionNode struct {
 var _ Node = (*LimitOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n LimitOptionNode) GetChildren() []Node {
+func (n *LimitOptionNode) GetChildren() []Node {
 	return []Node{n.Value}
 }
 
@@ -937,7 +937,7 @@ type InsertWithColumnOptionNode struct {
 var _ Node = (*InsertWithColumnOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n InsertWithColumnOptionNode) GetChildren() []Node {
+func (n *InsertWithColumnOptionNode) GetChildren() []Node {
 	size := len(n.Column)
 	for i := 0; i < len(n.Value); i++ {
 		size += len(n.Value[i])
@@ -963,7 +963,7 @@ type InsertWithDefaultOptionNode struct {
 var _ Node = (*InsertWithDefaultOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n InsertWithDefaultOptionNode) GetChildren() []Node {
+func (n *InsertWithDefaultOptionNode) GetChildren() []Node {
 	return nil
 }
 
@@ -975,7 +975,7 @@ type PrimaryOptionNode struct {
 var _ Node = (*PrimaryOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n PrimaryOptionNode) GetChildren() []Node {
+func (n *PrimaryOptionNode) GetChildren() []Node {
 	return nil
 }
 
@@ -987,7 +987,7 @@ type NotNullOptionNode struct {
 var _ Node = (*NotNullOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n NotNullOptionNode) GetChildren() []Node {
+func (n *NotNullOptionNode) GetChildren() []Node {
 	return nil
 }
 
@@ -999,7 +999,7 @@ type UniqueOptionNode struct {
 var _ Node = (*UniqueOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n UniqueOptionNode) GetChildren() []Node {
+func (n *UniqueOptionNode) GetChildren() []Node {
 	return nil
 }
 
@@ -1011,7 +1011,7 @@ type AutoIncrementOptionNode struct {
 var _ Node = (*AutoIncrementOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n AutoIncrementOptionNode) GetChildren() []Node {
+func (n *AutoIncrementOptionNode) GetChildren() []Node {
 	return nil
 }
 
@@ -1024,7 +1024,7 @@ type DefaultOptionNode struct {
 var _ Node = (*DefaultValueNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n DefaultOptionNode) GetChildren() []Node {
+func (n *DefaultOptionNode) GetChildren() []Node {
 	return []Node{n.Value}
 }
 
@@ -1038,7 +1038,7 @@ type ForeignOptionNode struct {
 var _ Node = (*ForeignOptionNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n ForeignOptionNode) GetChildren() []Node {
+func (n *ForeignOptionNode) GetChildren() []Node {
 	return []Node{n.Table, n.Column}
 }
 
@@ -1061,7 +1061,7 @@ type SelectStmtNode struct {
 var _ Node = (*SelectStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n SelectStmtNode) GetChildren() []Node {
+func (n *SelectStmtNode) GetChildren() []Node {
 	nodes := make([]Node, len(n.Column)+2+len(n.Group)+len(n.Order)+2)
 	idx := 0
 	for i := 0; i < len(n.Column); i, idx = i+1, idx+1 {
@@ -1095,7 +1095,7 @@ type UpdateStmtNode struct {
 var _ Node = (*UpdateStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n UpdateStmtNode) GetChildren() []Node {
+func (n *UpdateStmtNode) GetChildren() []Node {
 	nodes := make([]Node, 1+len(n.Assignment)+1)
 	idx := 0
 	nodes[idx] = n.Table
@@ -1117,7 +1117,7 @@ type DeleteStmtNode struct {
 var _ Node = (*DeleteStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n DeleteStmtNode) GetChildren() []Node {
+func (n *DeleteStmtNode) GetChildren() []Node {
 	return []Node{n.Table, n.Where}
 }
 
@@ -1131,7 +1131,7 @@ type InsertStmtNode struct {
 var _ Node = (*InsertStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n InsertStmtNode) GetChildren() []Node {
+func (n *InsertStmtNode) GetChildren() []Node {
 	return []Node{n.Table, n.Insert}
 }
 
@@ -1145,7 +1145,7 @@ type CreateTableStmtNode struct {
 var _ Node = (*CreateTableStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n CreateTableStmtNode) GetChildren() []Node {
+func (n *CreateTableStmtNode) GetChildren() []Node {
 	nodes := make([]Node, 1+len(n.Column))
 	nodes[0] = n.Table
 	for i := 0; i < len(n.Column); i++ {
@@ -1165,7 +1165,7 @@ type ColumnSchemaNode struct {
 var _ Node = (*ColumnSchemaNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n ColumnSchemaNode) GetChildren() []Node {
+func (n *ColumnSchemaNode) GetChildren() []Node {
 	nodes := make([]Node, 2+len(n.Constraint))
 	nodes[0] = n.Column
 	nodes[1] = n.DataType
@@ -1187,7 +1187,7 @@ type CreateIndexStmtNode struct {
 var _ Node = (*CreateIndexStmtNode)(nil)
 
 // GetChildren returns a list of child nodes used for traversing.
-func (n CreateIndexStmtNode) GetChildren() []Node {
+func (n *CreateIndexStmtNode) GetChildren() []Node {
 	nodes := make([]Node, 2+len(n.Column)+1)
 	idx := 0
 	nodes[idx] = n.Index