void IVisitor.VisitBefore(SubQueryPredicate predicate)
{
this.ParentExists(predicate);
}
void IVisitor.Visit(SubQueryPredicate predicate, int offset)
{
this.ParentExists(predicate);
}
void IVisitor.VisitAfter(SubQueryPredicate predicate)
{
this.ParentExists(predicate);
}
public override void ExitSubQueryPredicate(MiniSqlParserParser.SubQueryPredicateContext context)
{
var comments = this.GetComments(context);
var query = (IQuery)_stack.Pop();
var opType2 = context.op2.Type;
QueryQuantifier quantifier = QueryQuantifier.Any;
if (opType2 == MiniSqlParserLexer.K_ANY)
{
quantifier = QueryQuantifier.Any;
}
else if (opType2 == MiniSqlParserLexer.K_SOME)
{
quantifier = QueryQuantifier.Some;
}
else if (opType2 == MiniSqlParserLexer.K_ALL)
{
quantifier = QueryQuantifier.All;
}
else
{
throw new CannotBuildASTException("Undifined QueryQuantifier is used");
}
var opType1 = context.op1.Type;
PredicateOperator operater = PredicateOperator.Equal;
if (opType1 == MiniSqlParserLexer.ASSIGN)
{
operater = PredicateOperator.Equal;
}
else if (opType1 == MiniSqlParserLexer.NOT_EQ2)
{
operater = PredicateOperator.NotEqual;
}
else if (opType1 == MiniSqlParserLexer.LT)
{
operater = PredicateOperator.Less;
}
else if (opType1 == MiniSqlParserLexer.LT_EQ)
{
operater = PredicateOperator.LessOrEqual;
}
else if (opType1 == MiniSqlParserLexer.GT)
{
operater = PredicateOperator.Greater;
}
else if (opType1 == MiniSqlParserLexer.GT_EQ)
{
operater = PredicateOperator.GreaterOrEqual;
}
else if (opType1 == MiniSqlParserLexer.EQ)
{
operater = PredicateOperator.Equal2;
}
else if (opType1 == MiniSqlParserLexer.NOT_EQ1)
{
operater = PredicateOperator.NotEqual2;
}
else
{
throw new CannotBuildASTException("Undifined PredicateOperator is used");
}
var operand = (Expr)_stack.Pop();
var node = new SubQueryPredicate(operand, operater, quantifier, query, comments);
_stack.Push(node);
}
