public override gsSelectColumn Parse()
{
gsSelectColumn selCol;
if (_ScalarExpression is IntegerLiteral)
{
var intLiteral = _ScalarExpression as IntegerLiteral;
selCol = new gsNumberColumn()
{
Value = intLiteral.Value,
ColumnAlias = ColumnAlias
};
}
else if (_ScalarExpression is StringLiteral)
{
var stringLiteral = _ScalarExpression as StringLiteral;
selCol = new gsStringColumn()
{
Value = stringLiteral.Value,
ColumnAlias = ColumnAlias
};
if (IsDate(Convert.ToString(stringLiteral.Value)))
{
selCol = new gsDateColumn();
selCol.ColumnName = "@sqlPrm" + SqlParameters.NewID();
selCol.Value = $"DateTime.Parse({stringLiteral.Value.Quoted()})";
AddParameter(selCol, false);
}
}
else if (_ScalarExpression is NullLiteral)
{
var intLiteral = _ScalarExpression as NullLiteral;
selCol = new gsNullColumn()
{
Value = intLiteral.Value,
ColumnAlias = ColumnAlias
};
}
else
{
throw new NotImplementedException($"Literal of type {_ScalarExpression.GetType().Name} not supported");
}
return(selCol);
}