Function NewJoin

query/sql/tree/Join.go:66–83

NewJoin creates Join

(location *NodeLocation, joinType JoinType, left, right IRelation, criteria IJoinCriteria)

// NewJoin creates Join
func NewJoin(location *NodeLocation, joinType JoinType, left, right IRelation, criteria IJoinCriteria) *Join {
	errMsg := fmt.Sprintf("left is null at (line:%d, col:%d)", location.Line, location.CharPosition)
	util.RequireNonNull(left, errMsg)
	errMsg = fmt.Sprintf("right is null at (line:%d, col:%d)", location.Line, location.CharPosition)
	util.RequireNonNull(right, errMsg)

	if joinType != LEFT {
		panic(fmt.Errorf("only support left join at (line:%d, col:%d)", location.Line, location.CharPosition))
	}

	return &Join{
		NewRelation(location),
		joinType,
		left,
		right,
		criteria,
	}
}

// Accept accepts visitor
func (e *Join) Accept(visitor AstVisitor, ctx interface{}) interface{} {