Re: How to query by column names

So why are you avoiding "SELECT * FROM t1;" ?

You'd probably also be happier using information_schema to get the column
names.

On Mon, 22 Jan 2007, Richard Ray wrote:

> All attributes of t1
> Where (select attname from pg_attribute where attrelid = (select relfilenode
> from pg_class where relname = 't1') and attisdropped = false and attnum > 0)
> is a substitute for *
>
> On Mon, 22 Jan 2007, Jeff Frost wrote:
>
>> Perhaps I should have asked this earlier. What information are you trying
>> to extract?
>>
>> On Mon, 22 Jan 2007, Richard Ray wrote:
>>
>>> This is not exactly what I need
>>> I want to return the data in t1
>>>
>>> On Mon, 22 Jan 2007, Jeff Frost wrote:
>>>
>>>> I think this is what you're looking for Richard:
>>>>
>>>> SELECT attname FROM pg_attribute pa, pg_class pc
>>>> WHERE pc.relname = 't1'
>>>> AND pa.attrelid = pc.relfilenode
>>>> AND pa.attisdropped IS FALSE
>>>> AND pa.attnum > 0;
>>>>
>>>> Let me know if it doesn't do what you intended.
>>>>
>>>> On Mon, 22 Jan 2007, Richard Ray wrote:
>>>>
>>>>> This may be a simple but can I create a query such as
>>>>>
>>>>> select (select attname from pg_attribute where attrelid = (select
>>>>> relfilenode from pg_class where relname = 't1') and attisdropped = false
>>>>> and attnum > 0) from t1;
>>>>>
>>>>> I get
>>>>> ERROR: more than one row returned by a subquery used as an expression
>>>>>
>>>>> Thanks
>>>>> Richard
>>>>>
>>>>> ---------------------------(end of broadcast)---------------------------
>>>>> TIP 5: don't forget to increase your free space map settings
>>>>>
>>>>>
>>>>
>>>> --
>>>> Jeff Frost, Owner <jeff(at)frostconsultingllc(dot)com>
>>>> Frost Consulting, LLC http://www.frostconsultingllc.com/
>>>> Phone: 650-780-7908 FAX: 650-649-1954
>>>>
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>>>
>>> ---------------------------(end of broadcast)---------------------------
>>> TIP 9: In versions below 8.0, the planner will ignore your desire to
>>> choose an index scan if your joining column's datatypes do not
>>> match
>>>
>>>
>>
>> --
>> Jeff Frost, Owner <jeff(at)frostconsultingllc(dot)com>
>> Frost Consulting, LLC http://www.frostconsultingllc.com/
>> Phone: 650-780-7908 FAX: 650-649-1954
>>
>
>

--
Jeff Frost, Owner <jeff(at)frostconsultingllc(dot)com>
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954