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Gary Ellwood
PostPosted: Thu Jul 11, 2002 5:54 am    Post subject: Nested IF Statements Reply with quote

Novice

Joined: 17 Apr 2002
Posts: 12
Hello (again)

Are nested IF statements allowable in ESQL, and if so what is the correct syntax? I have written the following ESQL, which presently sends the dataflow engine into a loop!! I can't seem to find anything helpful in the documentation. It is further complicated by the fact that the nested IF occurs inside a WHILE loop.

DECLARE I INTEGER;
DECLARE TEST CHARACTER;
SET I=1;

WHILE I <= CARDINALITY (InputBody.ManOrder.ReportPOItem[]) DO

IF InputBody.ManOrder.ReportPOItem[I].NegVariance > 0 THEN
IF
((InputBody.ManOrder.ReportPOItem[I].NegVariance) > (THE (SELECT ITEM Threshold.NegativeThreshold FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1)))
THEN
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].EventType;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].NegativeThreshold;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].NegativeDesc;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].Status;
SET OutputRoot.XML.ManOrder.ReportPOItem[I].Status = THE (SELECT ITEM Threshold.Status FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].NegativeThreshold = THE (SELECT ITEM Threshold.NegativeThreshold FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].NegativeDesc = THE (SELECT ITEM Threshold.NegativeDesc FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent = 'Yes';
SET OutputRoot.XML.ManOrder.ReportPOItem[I].EventType = 'Negative';
ELSE
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent;
SET OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent = 'No';
END IF;
ELSE
IF
((InputBody.ManOrder.ReportPOItem[I].PosVariance) > (THE (SELECT ITEM Threshold.PositiveThreshold FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1)))
THEN
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].EventId;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].EventType;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].PositiveThreshold;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].PositiveDesc;
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].Status;

SET OutputRoot.XML.ManOrder.ReportPOItem[I].Status = THE (SELECT ITEM Threshold.Status FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].PositiveThreshold = THE (SELECT ITEM Threshold.PositiveThreshold FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].PositiveDesc = THE (SELECT ITEM Threshold.PositiveDesc FROM
Database.Threshold
WHERE Threshold.ProductId = InputBody.ManOrder.ReportPOItem[I].ManProductId AND
Threshold.EventId = 1);
SET OutputRoot.XML.ManOrder.ReportPOItem[I].EventId = 1;
SET OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent = 'Yes';
SET OutputRoot.XML.ManOrder.ReportPOItem[I].EventType = 'Positive';
ELSE
CREATE FIELD OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent;
SET OutputRoot.XML.ManOrder.ReportPOItem[I].RaiseEvent = 'No';
END IF;

END IF;
END WHILE;
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TorpedoSTu
PostPosted: Thu Jul 11, 2002 6:48 am    Post subject: Reply with quote

Acolyte

Joined: 14 Nov 2001
Posts: 73
The nesting is fine, but you don't seem to be incrementing I !!! - Therefore the infinite loop

Regs

Stuart
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Gary Ellwood
PostPosted: Thu Jul 11, 2002 9:02 am    Post subject: Reply with quote

Novice

Joined: 17 Apr 2002
Posts: 12
Ooooops. Thanks for that........I was obviously looking too hard and missing the obvious!!!
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