| From: | Bret Hughes <bhughes(at)elevating(dot)com> |
|---|---|
| To: | postgresql sql list <pgsql-sql(at)postgresql(dot)org> |
| Subject: | how can I query for unset timestamps |
| Date: | 2005-02-22 21:09:54 |
| Message-ID: | 1109106594.3945.120.camel@bretsony |
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| Thread: | |
| Lists: | pgsql-sql |
I have a table that I recently altered by adding several timestamp
columns. I would like to query the table for those rows for which the
timestamp has not been set but am unable to find a way to do so. any
tips ? in psql the column appears empty and char_length returns
nothing.
Some of what I have tried
"" -> not valid
char_length(last_timestamp) > 0 -> returns the rows with the time
stamps
where NOT char_length(last_timestamp) > 0 -> returns 0 rows
where NOT (char_length(last_timestamp) > 0 ) -> returns 0 rows
where last_timestamp = NULL; -> 0 rows
this is kicking my butt, and starting to piss me off so if any one has
tips I would appreciate it.
Bret
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| Next Message | Gregory S. Williamson | 2005-02-22 21:19:57 | Re: how can I query for unset timestamps |
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