Add compatibility view for chunk_constraint

Author: svenklemm

cmake/ScriptFiles.cmake

@@ -44,6 +44,7 @@ set(SOURCE_FILES
     uuidv7.sql
     ts_stats.sql
     views.sql
+    views_compat.sql
     views_experimental.sql
     gapfill.sql
     compression.sql

sql/updates/reverse-dev.sql

@@ -1,8 +1,6 @@
--- The PL/pgSQL helper switched to scalar args in the forward direction;
--- drop it so the target version's chunk_constraint.sql can restore the
--- row-typed signature.
-DROP FUNCTION IF EXISTS _timescaledb_functions.chunk_constraint_add_table_constraint(
-    integer, name, name);
+
+DROP VIEW IF EXISTS _timescaledb_catalog.chunk_constraint;
+DROP FUNCTION IF EXISTS _timescaledb_functions.chunk_constraint_add_table_constraint( integer, name, name);
 
 -- Recreate the chunk_constraint catalog table.
 CREATE TABLE _timescaledb_catalog.chunk_constraint (

sql/views.sql

@@ -427,10 +427,6 @@ AS SELECT * FROM timescaledb_information.hypertable_compression_settings;
 CREATE OR REPLACE VIEW timescaledb_information.chunk_columnstore_settings AS
 SELECT * FROM timescaledb_information.chunk_compression_settings;
 
---temporary alias for bgw_job
-CREATE OR REPLACE VIEW _timescaledb_config.bgw_job AS
-SELECT * from _timescaledb_catalog.bgw_job;
-
 -- chunk statistics view
 CREATE OR REPLACE VIEW timescaledb_information.stat_chunk_activity AS
 SELECT
@@ -499,6 +495,4 @@ LEFT JOIN _timescaledb_catalog.chunk c
        ON format('%I.%I', c.schema_name, c.table_name)::regclass = o.uncompressed_relid
 LEFT JOIN _timescaledb_catalog.hypertable h ON h.id = c.hypertable_id;
 
-
-GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_config TO PUBLIC;
 GRANT SELECT ON ALL TABLES IN SCHEMA timescaledb_information TO PUBLIC;

sql/views_compat.sql

@@ -0,0 +1,18 @@
+-- This file and its contents are licensed under the Apache License 2.0.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-APACHE for a copy of the license.
+
+-- temporary views for compatibility
+
+CREATE OR REPLACE VIEW _timescaledb_config.bgw_job AS
+SELECT * from _timescaledb_catalog.bgw_job;
+
+CREATE OR REPLACE VIEW _timescaledb_catalog.chunk_constraint AS
+SELECT
+  chunk_id,
+  id AS dimension_slice_id,
+  format('constraint_%s',id) AS constraint_name,
+  NULL::text AS hypertable_constraint_name from _timescaledb_catalog.dimension_slice;
+
+GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_config TO PUBLIC;
+GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_catalog TO PUBLIC;

test/expected/drop_rename_hypertable.out

@@ -183,6 +183,7 @@ SELECT schema, name FROM test.relation WHERE schema IN ('public', '_timescaledb_
  _timescaledb_catalog  | bgw_job
  _timescaledb_catalog  | chunk
  _timescaledb_catalog  | chunk_column_stats
+ _timescaledb_catalog  | chunk_constraint
  _timescaledb_catalog  | chunk_rewrite
  _timescaledb_catalog  | compression_algorithm
  _timescaledb_catalog  | compression_chunk_size

test/expected/pg_dump.out

@@ -397,6 +397,7 @@ WHERE   refclassid = 'pg_catalog.pg_extension'::pg_catalog.regclass AND
  _timescaledb_cache.cache_inval_bgw_job
  _timescaledb_cache.cache_inval_extension
  _timescaledb_cache.cache_inval_hypertable
+ _timescaledb_catalog.chunk_constraint
  _timescaledb_catalog.chunk_rewrite
  _timescaledb_catalog.compression_algorithm
  _timescaledb_catalog.tablespace_id_seq