public override SqlObject VisitLogical_scalar_expression([NotNull] sqlParser.Logical_scalar_expressionContext context)
{
Contract.Requires(context != null);
SqlObject sqlObject;
if (context.binary_scalar_expression() != null)
{
sqlObject = this.Visit(context.binary_scalar_expression());
}
else if (context.in_scalar_expression() != null)
{
sqlObject = this.Visit(context.in_scalar_expression());
}
else if (context.like_scalar_expression() != null)
{
sqlObject = this.Visit(context.like_scalar_expression());
}
else
{
throw new NotImplementedException();
}
return(sqlObject);
}
public override SqlObject VisitLogical_scalar_expression([NotNull] sqlParser.Logical_scalar_expressionContext context)
{
Contract.Requires(context != null);
SqlObject sqlObject;
if (context.binary_scalar_expression() != null)
{
sqlObject = this.Visit(context.binary_scalar_expression());
}
else if (context.in_scalar_expression() != null)
{
sqlObject = this.Visit(context.in_scalar_expression());
}
else if (context.like_scalar_expression() != null)
{
sqlObject = this.Visit(context.like_scalar_expression());
}
else
{
// logical_expression binary_operator logical_expression
Contract.Requires(context.ChildCount == 3);
SqlScalarExpression left = (SqlScalarExpression)this.Visit(context.logical_scalar_expression(0));
if (!CstToAstVisitor.binaryOperatorKindLookup.TryGetValue(
context.children[1].GetText(),
out SqlBinaryScalarOperatorKind operatorKind))
{
throw new ArgumentOutOfRangeException($"Unknown logical operator: {context.children[1].GetText()}.");
}
SqlScalarExpression right = (SqlScalarExpression)this.Visit(context.logical_scalar_expression(1));
sqlObject = SqlBinaryScalarExpression.Create(operatorKind, left, right);
}
return(sqlObject);
}