1 files changed, 39 insertions, 0 deletions
diff --git a/contrib/pg_walinspect/sql/oldextversions.sql b/contrib/pg_walinspect/sql/oldextversions.sql
new file mode 100644
index 0000000..e35c4f3
--- /dev/null
+++ b/contrib/pg_walinspect/sql/oldextversions.sql
@@ -0,0 +1,39 @@
+-- Test old extension version entry points.
+
+CREATE EXTENSION pg_walinspect WITH VERSION '1.0';
+
+-- Mask DETAIL messages as these could refer to current LSN positions.
+\set VERBOSITY terse
+
+-- List what version 1.0 contains, using a locale-independent sorting.
+SELECT pg_describe_object(classid, objid, 0) AS obj
+  FROM pg_depend
+  WHERE refclassid = 'pg_extension'::regclass AND
+    refobjid = (SELECT oid FROM pg_extension
+                  WHERE extname = 'pg_walinspect') AND deptype = 'e'
+  ORDER BY pg_describe_object(classid, objid, 0) COLLATE "C";
+
+-- Make sure checkpoints don't interfere with the test.
+SELECT 'init' FROM pg_create_physical_replication_slot('regress_pg_walinspect_slot', true, false);
+
+CREATE TABLE sample_tbl(col1 int, col2 int);
+SELECT pg_current_wal_lsn() AS wal_lsn1 \gset
+INSERT INTO sample_tbl SELECT * FROM generate_series(1, 2);
+
+-- Tests for the past functions.
+SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_records_info_till_end_of_wal(:'wal_lsn1');
+SELECT COUNT(*) >= 1 AS ok FROM pg_get_wal_stats_till_end_of_wal(:'wal_lsn1');
+-- Failures with start LSNs.
+SELECT * FROM pg_get_wal_records_info_till_end_of_wal('FFFFFFFF/FFFFFFFF');
+SELECT * FROM pg_get_wal_stats_till_end_of_wal('FFFFFFFF/FFFFFFFF');
+
+-- Move to new version 1.1.
+ALTER EXTENSION pg_walinspect UPDATE TO '1.1';
+
+-- List what version 1.1 contains.
+\dx+ pg_walinspect
+
+SELECT pg_drop_replication_slot('regress_pg_walinspect_slot');
+
+DROP TABLE sample_tbl;
+DROP EXTENSION pg_walinspect;