Ignore AFTER triggers sorting after z_repack_trigger

They are not a problem, and they fore after the BEFORE trigger anyway.

To be checked against more PostgreSQL versions.

bin/expected/repack.out

@@ -379,3 +379,29 @@ SELECT repack.get_order_by('issue3_5_idx'::regclass::oid, 'issue3_5'::regclass::
 
 \! pg_repack --dbname=contrib_regression --table=issue3_5
 INFO: repacking table "issue3_5"
+--
+-- Triggers handling
+--
+CREATE FUNCTION trgtest() RETURNS trigger AS
+$$BEGIN RETURN NEW; END$$
+LANGUAGE plpgsql;
+CREATE TABLE trg1 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_triggeq BEFORE UPDATE ON trg1 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg1
+INFO: repacking table "trg1"
+CREATE TABLE trg2 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_trigger BEFORE UPDATE ON trg2 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg2
+INFO: repacking table "trg2"
+WARNING: the table "trg2" has already a trigger called "z_repack_trigger"
+DETAIL: The trigger was probably installed during a previous attempt to run pg_repack on the table which was interrupted and for some reason failed to clean up the temporary objects.  Please drop the trigger or drop and recreate the pg_repack extension altogether to remove all the temporary objects left over.
+CREATE TABLE trg3 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_trigges BEFORE UPDATE ON trg3 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg3
+INFO: repacking table "trg3"
+WARNING: trigger "z_repack_trigges" conflicting on table "trg3"
+DETAIL: The trigger "z_repack_trigger" must be the last of the BEFORE triggers to fire on the table (triggers fire in alphabetical order). Please rename the trigger so that it sorts before "z_repack_trigger": you can use "ALTER TRIGGER z_repack_trigges ON trg3 RENAME TO newname".
+CREATE TABLE trg4 (id integer PRIMARY KEY);
+CREATE TRIGGER zzzzzz AFTER UPDATE ON trg4 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg4
+INFO: repacking table "trg4"

bin/sql/repack.sql

@@ -215,3 +215,22 @@ CREATE TABLE issue3_5 (col1 int NOT NULL, col2 text NOT NULL);
 CREATE UNIQUE INDEX issue3_5_idx ON issue3_5 (col1 DESC NULLS FIRST, col2 COLLATE "POSIX" DESC);
 SELECT repack.get_order_by('issue3_5_idx'::regclass::oid, 'issue3_5'::regclass::oid);
 \! pg_repack --dbname=contrib_regression --table=issue3_5
+
+--
+-- Triggers handling
+--
+CREATE FUNCTION trgtest() RETURNS trigger AS
+$$BEGIN RETURN NEW; END$$
+LANGUAGE plpgsql;
+CREATE TABLE trg1 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_triggeq BEFORE UPDATE ON trg1 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg1
+CREATE TABLE trg2 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_trigger BEFORE UPDATE ON trg2 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg2
+CREATE TABLE trg3 (id integer PRIMARY KEY);
+CREATE TRIGGER z_repack_trigges BEFORE UPDATE ON trg3 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg3
+CREATE TABLE trg4 (id integer PRIMARY KEY);
+CREATE TRIGGER zzzzzz AFTER UPDATE ON trg4 FOR EACH ROW EXECUTE PROCEDURE trgtest();
+\! pg_repack --dbname=contrib_regression --table=trg4

lib/pg_repack.sql.in

@@ -219,6 +219,7 @@ CREATE FUNCTION repack.conflicted_triggers(oid) RETURNS SETOF name AS
 $$
 SELECT tgname FROM pg_trigger
  WHERE tgrelid = $1 AND tgname >= 'z_repack_trigger'
+ AND (tgtype & 2) = 2      -- BEFORE trigger
  ORDER BY tgname;
 $$
 LANGUAGE sql STABLE STRICT;