Re: [COMMITTERS] pgsql-server: Clean up generation of default

>>> 3. Or even create a pg_get_sequence() function:
>>> SELECT SETVAL(pg_get_sequence(schema.table, col), 17);
>>
>>
>> Actually, this is the best solution :)

OK, attached is a pg_get_serial_sequence(schema, table, column) function
.  I have tested it with crazy names and it seems to be good.  It works
like this:

SELECT setval(pg_get_serial_sequence('public', 'mytable', 'mycol'), 1,
false);

If someone approves it, i'll work on making it a built-in backend
function, and make pg_dump use it.

This will also be great for our app, since we would no longer have to
have hard-coded sequence names in our code.  (For getting last sequence
val on oid-less tables)

Chris



CREATE FUNCTION pg_get_serial_sequence(name, name, name) RETURNS text
    AS '
    SELECT
        pg_catalog.quote_ident(pn_seq.nspname) || ''.'' || pg_catalog.quote_ident(seq.relname)
    FROM
        pg_catalog.pg_namespace pn,
        pg_catalog.pg_class pc,
        pg_catalog.pg_attribute pa,
        pg_catalog.pg_depend pd,
        pg_catalog.pg_class seq,
        pg_catalog.pg_namespace pn_seq
    WHERE
        pn.nspname=$1
        AND pc.relname=$2
        AND pa.attname=$3
        AND pn.oid=pc.relnamespace
        AND pc.oid=pa.attrelid
        AND pd.objid=seq.oid
        AND pd.classid=seq.tableoid
        AND pd.refclassid=seq.tableoid
        AND pd.refobjid=pc.oid
        AND pd.refobjsubid=pa.attnum
        AND pd.deptype=''i''
        AND seq.relkind=''S''
        AND seq.relnamespace=pn_seq.oid
'
    LANGUAGE sql;