Release 1.7.5

This maintenance release contains bugfixes since the 1.7.4 release.
Most of these fixes were backported from the 2.0.0 and 2.0.1 releases.
We deem it high priority for upgrading for users on TimescaleDB 1.7.4
or previous versions.

In particular the fixes contained in this maintenance release address
issues in continuous aggregates, compression, JOINs with hypertables,
and when upgrading from previous versions.

**Bugfixes**
* #2502 Replace check function when updating
* #2558 Repair dimension slice table on update
* #2619 Fix segfault in decompress_chunk for chunks with dropped
  columns
* #2664 Fix support for complex aggregate expression
* #2800 Lock dimension slices when creating new chunk
* #2860 Fix projection in ChunkAppend nodes
* #2865 Apply volatile function quals at decompresschunk
* #2851 Fix nested loop joins that involve compressed chunks
* #2868 Fix corruption in gapfill plan
* #2883 Fix join qual propagation for nested joins
* #2885 Fix compressed chunk check when disabling compression
* #2920 Fix repair in update scripts

**Thanks**
* @akamensky for reporting several issues including segfaults after
  version update
* @alex88 for reporting an issue with joined hypertables
* @dhodyn for reporting an issue when joining compressed chunks
* @diego-hermida for reporting an issue with disabling compression
* @Netskeh for reporting bug on time_bucket problem in continuous
  aggregates
* @WarriorOfWire for reporting the bug with gapfill queries not being
  able to find pathkey item to sort
* @zeeshanshabbir93 for reporting an issue with joins

CHANGELOG.md

@@ -16,6 +16,44 @@ accidentally triggering the load of a previous DB version.**
 **Thanks**
 * @zeeshanshabbir93 for reporting an issue with joins
 
+## 1.7.5 (2021-02-12)
+
+This maintenance release contains bugfixes since the 1.7.4 release.
+Most of these fixes were backported from the 2.0.0 and 2.0.1 releases.
+We deem it high priority for upgrading for users on TimescaleDB 1.7.4
+or previous versions.
+
+In particular the fixes contained in this maintenance release address
+issues in continuous aggregates, compression, JOINs with hypertables,
+and when upgrading from previous versions.
+
+**Bugfixes**
+* #2502 Replace check function when updating
+* #2558 Repair dimension slice table on update
+* #2619 Fix segfault in decompress_chunk for chunks with dropped 
+  columns
+* #2664 Fix support for complex aggregate expression
+* #2800 Lock dimension slices when creating new chunk
+* #2860 Fix projection in ChunkAppend nodes
+* #2865 Apply volatile function quals at decompresschunk
+* #2851 Fix nested loop joins that involve compressed chunks
+* #2868 Fix corruption in gapfill plan
+* #2883 Fix join qual propagation for nested joins
+* #2885 Fix compressed chunk check when disabling compression
+* #2920 Fix repair in update scripts
+
+**Thanks**
+* @akamensky for reporting several issues including segfaults after
+  version update
+* @alex88 for reporting an issue with joined hypertables
+* @dhodyn for reporting an issue when joining compressed chunks
+* @diego-hermida for reporting an issue with disabling compression
+* @Netskeh for reporting bug on time_bucket problem in continuous
+  aggregates
+* @WarriorOfWire for reporting the bug with gapfill queries not being
+  able to find pathkey item to sort
+* @zeeshanshabbir93 for reporting an issue with joins
+
 ## 2.0.1 (2021-01-28)
 
 This maintenance release contains bugfixes since the 2.0.0 release.

sql/CMakeLists.txt

@@ -98,7 +98,8 @@ set(MOD_FILES
   updates/1.7.1--1.7.2.sql
   updates/1.7.2--1.7.3.sql
   updates/1.7.3--1.7.4.sql
-  updates/1.7.4--2.0.0-rc1.sql
+  updates/1.7.4--1.7.5.sql
+  updates/1.7.5--2.0.0-rc1.sql
   updates/2.0.0-rc1--2.0.0-rc2.sql
   updates/2.0.0-rc2--2.0.0-rc3.sql
   updates/2.0.0-rc3--2.0.0-rc4.sql

sql/updates/1.7.4--1.7.5.sql

@@ -0,0 +1,81 @@
+-- Recreate missing dimension slices that might be missing. If the
+-- dimension slice table is broken and there are dimension slices
+-- missing from the table, we will repair it by:
+--
+--    1. Finding all chunk constraints that have missing dimension
+--       slices and extract the constraint expression from the
+--       associated constraint.
+--
+--    2. Parse the constraint expression and extract the column name,
+--       and upper and lower range values as text or, if it is a
+--       partition constraint, pick the existing constraint (either
+--       uppper or lower end of range) and make the other end open.
+--
+--    3. Use the column type to construct the range values (UNIX
+--       microseconds) from these strings.
+INSERT INTO _timescaledb_catalog.dimension_slice
+WITH
+   -- All dimension slices that are mentioned in the chunk_constraint
+   -- table but are missing from the dimension_slice table.
+   missing_slices AS (
+      SELECT hypertable_id,
+             chunk_id,
+             dimension_slice_id,
+             constraint_name,
+             attname AS column_name,
+             pg_get_expr(conbin, conrelid) AS constraint_expr
+      FROM _timescaledb_catalog.chunk_constraint cc
+      JOIN _timescaledb_catalog.chunk ch ON cc.chunk_id = ch.id
+      JOIN pg_constraint ON conname = constraint_name
+      JOIN pg_namespace ns ON connamespace = ns.oid AND ns.nspname = ch.schema_name
+      JOIN pg_attribute ON attnum = conkey[1] AND attrelid = conrelid
+      WHERE
+         dimension_slice_id NOT IN (SELECT id FROM _timescaledb_catalog.dimension_slice)
+   ),
+
+  -- Unparsed range start and end for each dimension slice id that
+  -- is missing.
+   unparsed_missing_slices AS (
+      SELECT di.id AS dimension_id,
+             dimension_slice_id,
+             constraint_name,
+             column_type,
+             column_name,
+             (SELECT SUBSTRING(constraint_expr, $$>=\s*'?([\w\d\s:+-]+)'?$$)) AS range_start,
+             (SELECT SUBSTRING(constraint_expr, $$<\s*'?([\w\d\s:+-]+)'?$$)) AS range_end
+        FROM missing_slices JOIN _timescaledb_catalog.dimension di USING (hypertable_id, column_name)
+   )
+SELECT DISTINCT
+       dimension_slice_id,
+       dimension_id,
+       CASE
+       WHEN column_type = 'timestamptz'::regtype THEN
+            EXTRACT(EPOCH FROM range_start::timestamptz)::bigint * 1000000
+       WHEN column_type = 'timestamp'::regtype THEN
+            EXTRACT(EPOCH FROM range_start::timestamp)::bigint * 1000000
+       WHEN column_type = 'date'::regtype THEN
+            EXTRACT(EPOCH FROM range_start::date)::bigint * 1000000
+       ELSE
+            CASE
+            WHEN range_start IS NULL
+            THEN (-9223372036854775808)::bigint
+            ELSE range_start::bigint
+            END
+       END AS range_start,
+       CASE
+       WHEN column_type = 'timestamptz'::regtype THEN
+            EXTRACT(EPOCH FROM range_end::timestamptz)::bigint * 1000000
+       WHEN column_type = 'timestamp'::regtype THEN
+            EXTRACT(EPOCH FROM range_end::timestamp)::bigint * 1000000
+       WHEN column_type = 'date'::regtype THEN
+            EXTRACT(EPOCH FROM range_end::date)::bigint * 1000000
+       ELSE
+            CASE WHEN range_end IS NULL
+            THEN 9223372036854775807::bigint
+            ELSE range_end::bigint
+            END
+       END AS range_end
+  FROM unparsed_missing_slices;
+
+-- set compressed_chunk_id to NULL for dropped chunks
+UPDATE _timescaledb_catalog.chunk SET compressed_chunk_id = NULL WHERE dropped = true AND compressed_chunk_id IS NOT NULL;