1.73. sequencesetvalue( integer, integer, bigint, bigint )

関数特性

言語: PLPGSQL

戻り値: integer

sequenceSetValue (seq_id, seq_origin, ev_seqno, last_value) シーケンス seq_id を新規値 last_value に設定します。

declare
	p_seq_id			alias for $1;
	p_seq_origin			alias for $2;
	p_ev_seqno			alias for $3;
	p_last_value			alias for $4;
	v_fqname			text;
begin
	-- ----
	-- シーケンスの完全修飾名(Fully Qualified Name)を獲得
	-- ----
	select slon_quote_brute(PGN.nspname) || '.' ||
			slon_quote_brute(PGC.relname) into v_fqname
		from sl_sequence SQ,
			"pg_catalog".pg_class PGC, "pg_catalog".pg_namespace PGN
		where SQ.seq_id = p_seq_id
			and SQ.seq_reloid = PGC.oid
			and PGC.relnamespace = PGN.oid;
	if not found then
		raise exception 'Slony-I: sequence % not found', p_seq_id;
	end if;

	-- ----
	-- 新規値に更新
	-- ----
	execute 'select setval(''' || v_fqname ||
			''', ''' || p_last_value || ''')';

	insert into sl_seqlog
			(seql_seqid, seql_origin, seql_ev_seqno, seql_last_value)
			values (p_seq_id, p_seq_origin, p_ev_seqno, p_last_value);

	return p_seq_id;
end;