2 files changed, 79 insertions, 0 deletions
diff --git a/contrib/test_decoding/specs/oldest_xmin.spec b/contrib/test_decoding/specs/oldest_xmin.spec
new file mode 100644
index 00000000000..4f8af70aa26
--- /dev/null
+++ b/contrib/test_decoding/specs/oldest_xmin.spec
@@ -0,0 +1,37 @@
+# Test advancement of the slot's oldest xmin
+
+setup
+{
+    SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); -- must be first write in xact
+    DROP TYPE IF EXISTS basket;
+    CREATE TYPE basket AS (apples integer, pears integer, mangos integer);
+    DROP TABLE IF EXISTS harvest;
+    CREATE TABLE harvest(fruits basket);
+}
+
+teardown
+{
+    DROP TABLE IF EXISTS harvest;
+    DROP TYPE IF EXISTS basket;
+    SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
+}
+
+session "s0"
+step "s0_begin" { BEGIN; }
+step "s0_getxid" { SELECT txid_current() IS NULL; }
+step "s0_alter" { ALTER TYPE basket DROP ATTRIBUTE mangos; }
+step "s0_commit" { COMMIT; }
+step "s0_checkpoint" { CHECKPOINT; }
+step "s0_vacuum" { VACUUM FULL; }
+step "s0_get_changes" { SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); }
+
+session "s1"
+step "s1_begin" { BEGIN; }
+step "s1_insert" { INSERT INTO harvest VALUES ((1, 2, 3)); }
+step "s1_commit" { COMMIT; }
+
+# Checkpoint with following get_changes forces to advance xmin. ALTER of a
+# composite type is a rare form of DDL which allows T1 to see the tuple which
+# will be removed (xmax set) before T1 commits. That is, interlocking doesn't
+# forbid modifying catalog after someone read it (and didn't commit yet).
+permutation "s0_begin" "s0_getxid" "s1_begin" "s1_insert" "s0_alter" "s0_commit" "s0_checkpoint" "s0_get_changes" "s1_commit" "s0_vacuum" "s0_get_changes"
diff --git a/contrib/test_decoding/specs/snapshot_transfer.spec b/contrib/test_decoding/specs/snapshot_transfer.spec
new file mode 100644
index 00000000000..47db7fd90ae
--- /dev/null
+++ b/contrib/test_decoding/specs/snapshot_transfer.spec
@@ -0,0 +1,42 @@
+# Test snapshot transfer from subxact to top-level and receival of later snaps.
+
+setup
+{
+    SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); -- must be first write in xact
+    DROP TABLE IF EXISTS dummy;
+    CREATE TABLE dummy(i int);
+    DROP TABLE IF EXISTS harvest;
+    CREATE TABLE harvest(apples int, pears int);
+}
+
+teardown
+{
+    DROP TABLE IF EXISTS harvest;
+    DROP TABLE IF EXISTS dummy;
+    SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
+}
+
+session "s0"
+step "s0_begin" { BEGIN; }
+step "s0_begin_sub0" { SAVEPOINT s0; }
+step "s0_log_assignment" { SELECT txid_current() IS NULL; }
+step "s0_begin_sub1" { SAVEPOINT s1; }
+step "s0_sub_get_base_snap" { INSERT INTO dummy VALUES (0); }
+step "s0_insert" { INSERT INTO harvest VALUES (1, 2, 3); }
+step "s0_end_sub0" { RELEASE SAVEPOINT s0; }
+step "s0_end_sub1" { RELEASE SAVEPOINT s1; }
+step "s0_insert2" { INSERT INTO harvest VALUES (1, 2, 3, 4); }
+step "s0_commit" { COMMIT; }
+step "s0_get_changes" { SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); }
+
+session "s1"
+step "s1_produce_new_snap" { ALTER TABLE harvest ADD COLUMN mangos int; }
+
+# start top-level without base snap, get base snap in subxact, then create new
+# snap and make sure it is queued.
+permutation "s0_begin" "s0_begin_sub0" "s0_log_assignment" "s0_sub_get_base_snap" "s1_produce_new_snap" "s0_insert" "s0_end_sub0" "s0_commit" "s0_get_changes"
+
+# In previous test, we firstly associated subxact with xact and only then got
+# base snap; now nest one more subxact to get snap first and only then (at
+# commit) associate it with toplevel.
+permutation "s0_begin" "s0_begin_sub0" "s0_log_assignment" "s0_begin_sub1" "s0_sub_get_base_snap" "s1_produce_new_snap" "s0_insert" "s0_end_sub1" "s0_end_sub0" "s0_commit" "s0_get_changes"