Method VisitSortItem

query/sql/sql_parser.go:611–647

VisitSortItem visits the node

(ctx *antlrgen.SortItemContext)

// VisitSortItem visits the node
func (v *ASTBuilder) VisitSortItem(ctx *antlrgen.SortItemContext) interface{} {
	v.Logger.Debugf("VisitSortItem: %s", ctx.GetText())

	level, levelWith, levelQuery := v.getCtxLevels(v.SQL2AqlCtx)

	if ctx.Expression() == nil {
		return nil
	}

	var ordering tree.OrderType
	if ctx.GetOrdering() != nil {
		if ctx.GetOrdering().GetText() == tree.OrderTypes[tree.ASC] {
			ordering = tree.ASC
		} else if ctx.GetOrdering().GetText() == tree.OrderTypes[tree.DESC] {
			ordering = tree.DESC
		}
	}

	v.setCtxLevels(v.SQL2AqlCtx, level, levelWith, levelQuery)
	v.SQL2AqlCtx.exprCheck = true
	v.Visit(ctx.Expression())
	v.SQL2AqlCtx.exprCheck = false
	expr := v.Visit(ctx.Expression()).(tree.IExpression)
	_, name := v.lookupSQLExpr(v.SQL2AqlCtx, v.SQL2AqlCtx.mapKey, util.GetSubstring(expr.GetValue()))
	v.SQL2AqlCtx.MapOrderBy[v.SQL2AqlCtx.mapKey] =
		append(v.SQL2AqlCtx.MapOrderBy[v.SQL2AqlCtx.mapKey],
			queryCom.SortField{
				Name:  name,
				Order: tree.OrderTypes[ordering],
			})

	sortItem := tree.NewSortItem(v.getLocation(ctx), expr, ordering)
	sortItem.SetValue(fmt.Sprintf("SortItem: (%s)", v.getText(ctx.BaseParserRuleContext)))

	v.setCtxLevels(v.SQL2AqlCtx, level-1, levelWith, levelQuery)
	return sortItem
}

// ***************** boolean expressions ******************