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| How can I evaluate NULL VALUE ON REFERENCE TYPE ELEMENT |
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| Author |
Message
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| MizukiYamato |
 Posted: Sun Apr 11, 2010 6:22 pm Post subject: How can I evaluate NULL VALUE ON REFERENCE TYPE ELEMENT |
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Apprentice
Joined: 16 Dec 2009
Posts: 45
Location: Japan
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Hi,
I'm troubling on evaluation NULL VALUE ON REFERENCE TYPE variable.
I'm trying to search NULL value on message tree, and then set other value.
I want to do it with REFERENCE TYPE variable, so I tryed below code.
-------------------------------------------------
DECLARE ref REFERENCE TO InputRoot.XMLNSC.ns:Input.test;
IF(ref = NULL) THEN
SET ref = 1;
END IF;
-------------------------------------------------
but,
> SET ref = 1;
is not executed...
Please help me. |
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| Vitor |
| Posted: Sun Apr 11, 2010 6:34 pm Post subject: Re: How can I evaluate NULL VALUE ON REFERENCE TYPE ELEMENT |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| MizukiYamato wrote: |
| Please help me. |
Check the documentation on comparision operators. You'll find that NULL requires IS rather than =
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| MizukiYamato |
| Posted: Sun Apr 11, 2010 6:44 pm Post subject: Re2: How can I evaluate NULL VALUE ON REFERENCE TYPE ELEMENT |
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Apprentice
Joined: 16 Dec 2009
Posts: 45
Location: Japan
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Hi Vitor,
It goes well.
Thanks very much. |
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| rekarm01 |
| Posted: Mon Apr 12, 2010 10:03 am Post subject: Re: How can I evaluate NULL VALUE ON REFERENCE TYPE ELEMENT |
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Grand Master
Joined: 25 Jun 2008
Posts: 1415
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| Also check the documentation for the LASTMOVE() function. |
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