public override SqlExpression VisitConcatenation(PlSqlParser.ConcatenationContext context)
{
var exps = context.additiveExpression().Select(Visit).ToArray();
if (exps.Length == 1)
{
return(exps[0]);
}
return(SqlExpression.Function("CONCAT", exps));
}
/// <summary>
/// concatenation :
/// model_expression (AT (LOCAL | TIME ZONE concatenation) | interval_expression)?
/// | concatenation op = (ASTERISK | SOLIDUS) concatenation
/// | concatenation op = (PLUS_SIGN | MINUS_SIGN) concatenation
/// | concatenation BAR BAR concatenation
/// ;
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override object VisitConcatenation([NotNull] PlSqlParser.ConcatenationContext context)
{
object result = null;
var concatenations = context.concatenation();
var model_expression = context.model_expression();
if (model_expression != null)
{
result = VisitModel_expression(model_expression);
if (context.AT() != null)
{
Stop();
if (concatenations != null && concatenations.Length == 1)
{
Stop();
//result =
}
else
{
Stop();
var interval_expression = context.interval_expression();
if (interval_expression != null)
{
//result =
}
}
}
}
else
{
Stop();
result = new OBinaryExpression()
{
Left = VisitConcatenation(concatenations[0]) as OCodeExpression,
Operator = context.op.ConvertToOperator(),
Right = VisitConcatenation(concatenations[1]) as OCodeExpression
};
}
Debug.Assert(result != null);
return(result);
}
