column name with plpgsql

information_schema is the keyword here.

On 07/02/2009 14:26, Alain Roger wrote:

i have a table which can be altered with several additional column. How can
i test under plpgsql if a particular column already exists ?

select 1 from information_schema.columns
where table_name = 'your_table_name_here'
and column_name = 'your_column_name_here';

HTH,

Ray.

------------------------------------------------------------------
Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
rod@iol.ie
Galway Cathedral Recitals: http://www.galwaycathedral.org/recitals
------------------------------------------------------------------

Thanks a lot Raymond it works well.

On Sat, Feb 7, 2009 at 3:32 PM, Raymond O'Donnell <rod@iol.ie> wrote:

On 07/02/2009 14:26, Alain Roger wrote:

i have a table which can be altered with several additional column. How

can

i test under plpgsql if a particular column already exists ?

select 1 from information_schema.columns
where table_name = 'your_table_name_here'
and column_name = 'your_column_name_here';

HTH,

Ray.

------------------------------------------------------------------
Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
rod@iol.ie
Galway Cathedral Recitals: http://www.galwaycathedral.org/recitals
------------------------------------------------------------------

--
Alain
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