public override void VisitAfter(ExtractFuncExpr expr)
{
if (IsPlaceHolderExpr(expr.Argument))
{
expr.Argument = Place((PlaceHolderExpr)expr.Argument);
}
}
public override void ExitExtract_function(MiniSqlParserParser.Extract_functionContext context)
{
var comments = this.GetComments(context);
var datetimeComments = this.GetComments(context.datetimeField());
comments.InsertRange(2, datetimeComments);
Expr arg = null;
bool isComma = false;
if (context.expr() != null)
{
arg = (Expr)_stack.Pop();
isComma = context.K_FROM() == null;
}
DateTimeField dt = DateTimeField.Day;
var datetimeContext = context.datetimeField();
if (datetimeContext.K_DAY() != null)
{
dt = DateTimeField.Day;
}
else if (datetimeContext.K_YEAR() != null)
{
dt = DateTimeField.Year;
}
else if (datetimeContext.K_MONTH() != null)
{
dt = DateTimeField.Month;
}
else if (datetimeContext.K_HOUR() != null)
{
dt = DateTimeField.Hour;
}
else if (datetimeContext.K_MINUTE() != null)
{
dt = DateTimeField.Minute;
}
else if (datetimeContext.K_SECOND() != null)
{
dt = DateTimeField.Second;
}
else
{
throw new CannotBuildASTException("Undefined DateTimeField is used in EXTRACT function");
}
var name = context.K_EXTRACT().GetText();
var node = new ExtractFuncExpr(name, dt, isComma, arg, comments);
_stack.Push(node);
}
public override void VisitAfter(ExtractFuncExpr expr)
{
Expr arg = (Expr)_stack.Pop();
if (object.ReferenceEquals(expr.Argument, arg))
{
_stack.Push(expr);
return;
}
var node = new ExtractFuncExpr(expr.Name
, expr.DateTimeField
, expr.SeparatorIsComma, arg);
_stack.Push(node);
}
virtual public void VisitOnSeparator(ExtractFuncExpr expr, int offset)
{
}
virtual public void VisitAfter(ExtractFuncExpr expr)
{
}
virtual public void VisitBefore(ExtractFuncExpr expr)
{
}
public void VisitOnSeparator(ExtractFuncExpr expr, int offset)
{
_visitor.VisitOnSeparator(expr, offset);
}
public void VisitAfter(ExtractFuncExpr expr)
{
_visitor.VisitAfter(expr);
}
public void VisitBefore(ExtractFuncExpr expr)
{
_visitor.VisitBefore(expr);
}