From: | Rolf Cohn <rolf(dot)cohn(at)alcatel(dot)no> |
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To: | docs(at)postgresql(dot)org |
Cc: | Rolf Cohn <rolf(dot)cohn(at)alcatel(dot)no> |
Subject: | Handling of nullable columns in embedded SQL |
Date: | 1999-05-12 09:19:19 |
Message-ID: | 37394797.B884C573@alcatel.no |
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Lists: | pgsql-docs |
Hello!
How to treat NULL values in queries?
1) Is there an equivalent to the IFNULL (CA-Ingres)/NVL (Oracle)
functions?
Example:
EXEC SQL SELECT IFNULL(foo, -1) FROM bar INTO :dummy;
2) Is it possible to create a host variable
to put the NULL value indicator which then can be checked?
Example:
EXEC SQL SELECT foo FROM bar INTO :dummy_null_ind:dummy;
I have gone through the PostgreSQL Programmer's Guide and
the PostgreSQL User's Guide but did not find the answers.
Did I miss something?
Regards
--
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