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Re: How are the SELECT queries reconstructed in pg_views

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On 3/28/23 13:23, Adrian Klaver wrote:
On 3/28/23 06:43, Julius de Bruijn wrote:
Hi,

I haven't been able to find exactly what changes PostgreSQL does when
reconstructing the query, but I've successfully been able to create
views where the resulting query differs from what I wrote. Is there
any documentation for this feature where I can learn more about what
happens before the query is stringified to the information schema? Or,
even better, is there a way for me to send a query to the database and
as a result get back a reconstructed query?



I should have added I got pg_get_viewdef() from the below :

\d+ information_schema.views


...

 CASE
WHEN pg_has_role(c.relowner, 'USAGE'::text) THEN pg_get_viewdef(c.oid)
            ELSE NULL::text
        END::information_schema.character_data AS view_definition,

...

SELECT pg_catalog.pg_get_viewdef('61822'::pg_catalog.oid, true);
          pg_get_viewdef
--------------------------------
   SELECT up_test.id AS up_id,  +
      up_test.col_1 AS bool_col,+
      up_test.col_2 AS col2     +
     FROM up_test;



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx






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