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From: Maxwell Dreytser <[email protected]>
To: [email protected] <[email protected]>
Subject: RowDescription for a function does not include table OID
Date: Fri, 21 Jun 2024 14:41:55 +0000
Message-ID: <LV3PR16MB60014D610A726368182ACC7EE6C92@LV3PR16MB6001.namprd16.prod.outlook.com> (raw)
In-Reply-To: <LV3PR16MB6001216CE02B2D908F9D87ECE6C82@LV3PR16MB6001.namprd16.prod.outlook.com>
References: <LV3PR16MB6001AF4D05893E9FF4B3C746E6CE2@LV3PR16MB6001.namprd16.prod.outlook.com>
	<[email protected]>
	<LV3PR16MB6001CD31C5982777BA9BA25EE6CE2@LV3PR16MB6001.namprd16.prod.outlook.com>
	<LV3PR16MB6001216CE02B2D908F9D87ECE6C82@LV3PR16MB6001.namprd16.prod.outlook.com>

Hello,

I am working on a meta-programming use-case where I need to scrape some detailed information about the results of a function that "RETURNS TABLE (LIKE physical_table)", which ends up with prorettype = 'physical_table'::regtype.
The problem is that for the query "SELECT * FROM my_function()" the RowDescription that is sent back shows 0 for Table OID and Column Index.

From Wireshark:
PostgreSQL
    Type: Row description
    Length: 219
    Field count: 7
        Column name: table_id
            Table OID: 0
            Column index: 0
            Type OID: 20
            Column length: 8
            Type modifier: -1
            Format: Binary (1)
<snipped>

I would expect that the Table OID contains the relation OID of this table, as it would do for a typical statement like "SELECT * FROM my_table". It would seem there is a bug here that is preventing PostgreSQL from connecting the dots.

Regards,
Maxwell.


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