parser

type AggFuncVisitor struct {
	ColumnName_ *string
	TableName_  *string
}

type AssignVisitor struct {
	Colname_ *string
	Value_   *types.Value
}

type BinaryOpExpType int

type BinaryOpExpression struct {
	LogicalOperationType_    expression.LogicalOpType
	ComparisonOperationType_ expression.ComparisonType
	Left_                    interface{}
	Right_                   interface{}
}

type BinaryOpVisitor struct {
	QueryInfo_          *QueryInfo
	BinaryOpExpression_ *BinaryOpExpression
}

type ChildDataVisitor struct {
	ChildDatas_ []interface{}
}

type ColDefExpression struct {
	ColName_ *string
	ColType_ *types.TypeID
}

type IndexDefExpression struct {
	IndexName_ *string
	Colnames_  []*string
}

type JoinVisitor struct {
	QueryInfo_ *QueryInfo
}

type OrderByExpression struct {
	IsDesc_  bool
	ColName_ *string
}

type PrintNodesVisitor struct {
}

type QueryInfo struct {
	QueryType_           *QueryType
	SelectFields_        []*SelectFieldExpression // SELECT
	SetExpressions_      []*SetExpression         // UPDATE
	NewTable_            *string                  // CREATE TABLE
	ColDefExpressions_   []*ColDefExpression      // CREATE TABLE
	IndexDefExpressions_ []*IndexDefExpression    // CREATE TABLE
	TargetCols_          []*string                // INSERT
	Values_              []*types.Value           // INSERT
	OnExpressions_       *BinaryOpExpression      // SELECT (with JOIN)
	JoinTables_          []*string                // SELECT
	WhereExpression_     *BinaryOpExpression      // SELECT, UPDATE, DELETE
	LimitNum_            int32                    // SELECT
	OffsetNum_           int32                    // SELECT
	OrderByExpressions_  []*OrderByExpression     // SELECT
}

type QueryType int32

type RootSQLVisitor struct {
	QueryInfo_ *QueryInfo
}

type SelectFieldExpression struct {
	IsAgg_     bool
	AggType_   plans.AggregationType
	TableName_ *string // if specified
	ColName_   *string
}

type SelectFieldsVisitor struct {
	QueryInfo_ *QueryInfo
}

type SetExpression struct {
	ColName_     *string
	UpdateValue_ *types.Value
}

type Visitor interface {
	Enter(n ast.Node) (node ast.Node, skipChildren bool)
	Leave(n ast.Node) (node ast.Node, ok bool)
}