Update hypertable metadata table to include 'insert_temp_table' and keep the insert temp table in-sync with root in terms of fields.

extension/sql/common/tables.sql

@@ -40,6 +40,7 @@ CREATE TABLE IF NOT EXISTS hypertable (
     root_table_name         NAME                  NOT NULL,
     distinct_schema_name    NAME                  NOT NULL,
     distinct_table_name     NAME                  NOT NULL,
+    insert_temp_table_name  NAME                  NOT NULL,
     replication_factor      SMALLINT              NOT NULL CHECK (replication_factor > 0),
     placement               chunk_placement_type  NOT NULL,
     time_field_name         NAME                  NOT NULL,

extension/sql/main/ddl.sql

@@ -7,6 +7,7 @@ CREATE OR REPLACE FUNCTION  add_hypertable(
     number_partitions       SMALLINT = NULL,
     associated_schema_name  NAME = NULL,
     associated_table_prefix NAME = NULL,
+    insert_temp_table_name  NAME = NULL,
     hypertable_name         NAME = NULL,
     placement               chunk_placement_type = 'STICKY'
 )
@@ -36,7 +37,7 @@ BEGIN
         INTO hypertable_row
         FROM dblink(
           'meta_conn',
-          format('SELECT t FROM _meta.add_hypertable(%L, %L, %L, %L, %L, %L, %L, %L, %L, %L, %L, %L) t ', 
+          format('SELECT t FROM _meta.add_hypertable(%L, %L, %L, %L, %L, %L, %L, %L, %L, %L, %L, %L, %L) t ',
             schema_name,
             table_name,
             time_field_name,
@@ -46,6 +47,7 @@ BEGIN
             number_partitions,
             associated_schema_name,
             associated_table_prefix,
+            insert_temp_table_name,
             hypertable_name,
             placement,
             current_database()

extension/sql/main/field_triggers.sql

@@ -20,6 +20,8 @@ BEGIN
 END
 $BODY$;
 
+-- Used to update a hypertable (or the insert temp table) when a new
+-- field is added.
 CREATE OR REPLACE FUNCTION _sysinternal.create_field_on_table(
     schema_name   NAME,
     table_name    NAME,
@@ -209,14 +211,20 @@ BEGIN
       FROM hypertable AS h
       WHERE h.name = NEW.hypertable_name;
 
+      -- update root table
       PERFORM _sysinternal.create_field_on_table(hypertable_row.root_schema_name, hypertable_row.root_table_name,
                                                 NEW.name, NEW.attnum, NEW.data_type, NEW.default_value, NEW.not_null);
-      IF new.created_on <> current_database() THEN
+      -- update insert temp table
-        PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+      PERFORM _sysinternal.create_field_on_table(hypertable_row.associated_schema_name, hypertable_row.insert_temp_table_name,
-        PERFORM _sysinternal.create_field_on_table(hypertable_row.main_schema_name, hypertable_row.main_table_name,
                                                 NEW.name, NEW.attnum, NEW.data_type, NEW.default_value, NEW.not_null);
 
-      END IF;
+      IF new.created_on <> current_database() THEN
+        PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+        -- update main table on others
+        PERFORM _sysinternal.create_field_on_table(hypertable_row.main_schema_name, hypertable_row.main_table_name,
+                                                  NEW.name, NEW.attnum, NEW.data_type, NEW.default_value, NEW.not_null);
+     END IF;
+
       PERFORM _sysinternal.create_partition_constraint_for_field(NEW.hypertable_name, NEW.name);
       RETURN NEW;
     ELSIF TG_OP = 'UPDATE' THEN
@@ -227,30 +235,46 @@ BEGIN
 
       IF NEW.default_value IS DISTINCT FROM OLD.default_value THEN
         update_found = TRUE;
+        -- update root table
         PERFORM _sysinternal.exec_alter_column_set_default(hypertable_row.root_schema_name, hypertable_row.root_table_name,
                                               NEW.name, NEW.default_value);
+        -- update insert temp table
+        PERFORM _sysinternal.exec_alter_column_set_default(hypertable_row.associated_schema_name, hypertable_row.insert_temp_table_name,
+                                              NEW.name, NEW.default_value);
+
         IF NEW.modified_on <> current_database() THEN
           PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+          -- update main table on others
           PERFORM _sysinternal.exec_alter_column_set_default(hypertable_row.main_schema_name, hypertable_row.main_table_name,
                                               NEW.name, NEW.default_value);
         END IF;
       END IF;
       IF NEW.not_null IS DISTINCT FROM OLD.not_null THEN
         update_found = TRUE;
+        -- update root table
         PERFORM _sysinternal.exec_alter_column_set_not_null(hypertable_row.root_schema_name, hypertable_row.root_table_name,
                                               NEW.name, NEW.not_null);
+        -- update insert temp table
+        PERFORM _sysinternal.exec_alter_column_set_not_null(hypertable_row.associated_schema_name, hypertable_row.insert_temp_table_name,
+                                              NEW.name, NEW.not_null);
         IF NEW.modified_on <> current_database() THEN
           PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+          -- update main table on others
           PERFORM _sysinternal.exec_alter_column_set_not_null(hypertable_row.main_schema_name, hypertable_row.main_table_name,
                                               NEW.name, NEW.not_null);
         END IF;
       END IF;
       IF NEW.name IS DISTINCT FROM OLD.name THEN
         update_found = TRUE;
+        -- update root table
         PERFORM _sysinternal.exec_alter_table_rename_column(hypertable_row.root_schema_name, hypertable_row.root_table_name,
                                               OLD.name, NEW.name);
+        -- update insert temp table
+        PERFORM _sysinternal.exec_alter_table_rename_column(hypertable_row.associated_schema_name, hypertable_row.insert_temp_table_name,
+                                              OLD.name, NEW.name);
         IF NEW.modified_on <> current_database() THEN
           PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+          -- update main table on others
           PERFORM _sysinternal.exec_alter_table_rename_column(hypertable_row.main_schema_name, hypertable_row.main_table_name,
                                               OLD.name, NEW.name);
         END IF;
@@ -294,10 +318,16 @@ BEGIN
     FROM hypertable AS h
     WHERE h.name = NEW.hypertable_name;
 
+    -- update root table
     PERFORM _sysinternal.drop_field_on_table(hypertable_row.root_schema_name, hypertable_row.root_table_name,
                                               NEW.name);
+    -- update insert temp table
+    PERFORM _sysinternal.drop_field_on_table(hypertable_row.associated_schema_name, hypertable_row.insert_temp_table_name,
+                                              NEW.name);
+
     IF NEW.deleted_on <> current_database() THEN
       PERFORM set_config('io.ignore_ddl_in_trigger', 'true', true);
+      -- update main table on others
       PERFORM _sysinternal.drop_field_on_table(hypertable_row.main_schema_name, hypertable_row.main_table_name,
                                               NEW.name);
     END IF;
@@ -306,4 +336,3 @@ BEGIN
 END
 $BODY$
 SET SEARCH_PATH = 'public';
-

extension/sql/main/hypertable_triggers.sql

@@ -16,6 +16,7 @@ BEGIN
 
     PERFORM _sysinternal.create_root_table(NEW.root_schema_name, NEW.root_table_name);
     PERFORM _sysinternal.create_root_distinct_table(NEW.distinct_schema_name, NEW.distinct_table_name);
+    PERFORM _sysinternal.create_insert_temp_table(NEW.associated_schema_name, NEW.insert_temp_table_name);
 
     IF NEW.created_on <> current_database() THEN
        PERFORM _sysinternal.create_main_table(NEW.main_schema_name, NEW.main_table_name);

extension/sql/main/table_creation.sql

@@ -41,6 +41,25 @@ BEGIN
 END
 $BODY$;
 
+-- Creates the temporary table for INSERTs. INSERTs on the root table are
+-- redirected to the temporary table using a RULE. An associated trigger
+-- on this table then inserts all rows in bulk after all rows are INSERTed.
+-- The table is UNLOGGED for performance.
+CREATE OR REPLACE FUNCTION _sysinternal.create_insert_temp_table(
+    schema_name NAME,
+    table_name  NAME
+)
+    RETURNS VOID LANGUAGE PLPGSQL VOLATILE AS
+$BODY$
+BEGIN
+    EXECUTE format(
+        $$
+            CREATE UNLOGGED TABLE IF NOT EXISTS %I.%I (
+            )
+        $$, schema_name, table_name);
+END
+$BODY$;
+
 CREATE OR REPLACE FUNCTION _sysinternal.create_root_distinct_table(
     schema_name NAME,
     table_name  NAME
@@ -244,5 +263,3 @@ BEGIN
     END IF;
 END
 $BODY$;
-
-

extension/sql/meta/cluster.sql

@@ -54,7 +54,6 @@ BEGIN
 END
 $BODY$;
 
-
 CREATE OR REPLACE FUNCTION add_partition_epoch(
     hypertable_name    NAME,
     keyspace_start     SMALLINT [],
@@ -90,5 +89,3 @@ SELECT add_partition_epoch(
     partitioning_field
 )
 $BODY$;
-
-

extension/sql/meta/ddl.sql

@@ -13,6 +13,7 @@ CREATE OR REPLACE FUNCTION _meta.add_hypertable(
     number_partitions       SMALLINT,
     associated_schema_name  NAME,
     associated_table_prefix NAME,
+    insert_temp_table_name  NAME,
     hypertable_name         NAME,
     placement               chunk_placement_type,
     created_on              NAME
@@ -34,6 +35,10 @@ BEGIN
         associated_table_prefix = format('_hyper_%s', id);
     END IF;
 
+    IF insert_temp_table_name IS NULL THEN
+        insert_temp_table_name = format('_hyper_%s_insert_temp', id);
+    END IF;
+
     IF number_partitions IS NULL THEN
         SELECT COUNT(*)
         INTO number_partitions
@@ -50,6 +55,7 @@ BEGIN
         associated_schema_name, associated_table_prefix,
         root_schema_name, root_table_name,
         distinct_schema_name, distinct_table_name,
+        insert_temp_table_name,
         replication_factor,
         placement,
         time_field_name, time_field_type,
@@ -60,6 +66,7 @@ BEGIN
         associated_schema_name, associated_table_prefix,
         associated_schema_name, format('%s_root', associated_table_prefix),
         associated_schema_name, format('%s_distinct', associated_table_prefix),
+        insert_temp_table_name,
         replication_factor,
         placement,
         time_field_name, time_field_type,
@@ -190,4 +197,3 @@ SELECT set_config('io.deleting_node', modified_on, true);
 DELETE FROM hypertable_index i
 WHERE i.main_index_name = drop_index.main_index_name AND i.main_schema_name = drop_index.main_schema_name;
 $BODY$;
-

extension/sql/tests/regression/expected/cluster.out

@@ -52,9 +52,9 @@ CREATE INDEX ON PUBLIC."testNs" (temp, time DESC NULLS LAST) WHERE temp IS NOT N
 CREATE INDEX ON PUBLIC."testNs" (really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_and_on_and_on, time DESC NULLS LAST) WHERE really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_and_on_and_on IS NOT NULL;
 CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_and_on_and_on) WHERE really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_and_on_and_on IS NOT NULL;
 SELECT * FROM add_hypertable('"public"."testNs"', 'time', 'Device_id', hypertable_name=>'testNs');
-  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
---------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+--------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT set_is_distinct_flag('"public"."testNs"', 'Device_id', TRUE);
@@ -96,9 +96,9 @@ FROM meta;
 
 SELECT *
 FROM hypertable;
-  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
---------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+--------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT *
@@ -200,9 +200,9 @@ FROM meta;
 
 SELECT *
 FROM hypertable;
-  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
---------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+--------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ testNs | public           | testNs          | _sys_1_testNs          | _hyper_1                | _sys_1_testNs    | _hyper_1_root   | _sys_1_testNs        | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT *
@@ -411,6 +411,16 @@ Index "_sys_1_testNs._hyper_1_distinct_pkey"
  value  | text | value      | extended
 primary key, btree, for table "_sys_1_testNs._hyper_1_distinct"
 
+                                          Unlogged table "_sys_1_testNs._hyper_1_insert_temp"
+                             Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
+-----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------
+ time                                                            | bigint           | not null  | plain    |              | 
+ Device_id                                                       | text             | not null  | extended |              | 
+ temp                                                            | double precision |           | plain    |              | 
+ occupied                                                        | boolean          |           | plain    |              | 
+ latitude                                                        | bigint           |           | plain    |              | 
+ really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_an | bigint           |           | plain    |              | 
+
                                                   Table "_sys_1_testNs._hyper_1_root"
                              Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
 -----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------
@@ -563,6 +573,16 @@ Index "_sys_1_testNs._hyper_1_distinct_pkey"
  value  | text | value      | extended
 primary key, btree, for table "_sys_1_testNs._hyper_1_distinct"
 
+                                          Unlogged table "_sys_1_testNs._hyper_1_insert_temp"
+                             Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
+-----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------
+ time                                                            | bigint           | not null  | plain    |              | 
+ Device_id                                                       | text             | not null  | extended |              | 
+ temp                                                            | double precision |           | plain    |              | 
+ occupied                                                        | boolean          |           | plain    |              | 
+ latitude                                                        | bigint           |           | plain    |              | 
+ really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_an | bigint           |           | plain    |              | 
+
                                                   Table "_sys_1_testNs._hyper_1_root"
                              Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
 -----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------
@@ -787,6 +807,16 @@ Index "_sys_1_testNs._hyper_1_distinct_pkey"
  value  | text | value      | extended
 primary key, btree, for table "_sys_1_testNs._hyper_1_distinct"
 
+                                          Unlogged table "_sys_1_testNs._hyper_1_insert_temp"
+                             Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
+-----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------
+ time                                                            | bigint           | not null  | plain    |              | 
+ Device_id                                                       | text             | not null  | extended |              | 
+ temp                                                            | double precision |           | plain    |              | 
+ occupied                                                        | boolean          |           | plain    |              | 
+ latitude                                                        | bigint           |           | plain    |              | 
+ really_long_field_goes_on_and_on_and_on_and_on_and_on_and_on_an | bigint           |           | plain    |              | 
+
                                                   Table "_sys_1_testNs._hyper_1_root"
                              Column                              |       Type       | Modifiers | Storage  | Stats target | Description 
 -----------------------------------------------------------------+------------------+-----------+----------+--------------+-------------

extension/sql/tests/regression/expected/ddl.out

@@ -51,15 +51,15 @@ CREATE TABLE PUBLIC."Hypertable_1" (
 );
 CREATE INDEX ON PUBLIC."Hypertable_1" (time, "Device_id");
 SELECT * FROM add_hypertable('"public"."Hypertable_1"', 'time', 'Device_id');
-         name          | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+         name          | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
------------------------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+-----------------------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- public."Hypertable_1" | public           | Hypertable_1    | _sys_1_                | _hyper_1                | _sys_1_          | _hyper_1_root   | _sys_1_              | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ public."Hypertable_1" | public           | Hypertable_1    | _sys_1_                | _hyper_1                | _sys_1_          | _hyper_1_root   | _sys_1_              | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT * FROM hypertable;
-         name          | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+         name          | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
------------------------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+-----------------------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- public."Hypertable_1" | public           | Hypertable_1    | _sys_1_                | _hyper_1                | _sys_1_          | _hyper_1_root   | _sys_1_              | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ public."Hypertable_1" | public           | Hypertable_1    | _sys_1_                | _hyper_1                | _sys_1_          | _hyper_1_root   | _sys_1_              | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT * FROM hypertable_index;

extension/sql/tests/regression/expected/insert.out

@@ -53,9 +53,9 @@ CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_1)  WHERE series_1
 CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_2) WHERE series_2 IS NOT NULL;
 CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_bool) WHERE series_bool IS NOT NULL;
 SELECT * FROM add_hypertable('"public"."testNs"', 'time', 'device_id', hypertable_name=>'testNs', associated_schema_name=>'testNs' );
-  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
---------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+--------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- testNs | public           | testNs          | testNs                 | _hyper_1                | testNs           | _hyper_1_root   | testNs               | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ testNs | public           | testNs          | testNs                 | _hyper_1                | testNs           | _hyper_1_root   | testNs               | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT set_is_distinct_flag('"public"."testNs"', 'device_id', TRUE);
@@ -319,6 +319,16 @@ Child tables: "testNs"._hyper_1_0_distinct
  value  | text | value      | extended
 primary key, btree, for table "testNs._hyper_1_distinct"
 
+                    Unlogged table "testNs._hyper_1_insert_temp"
+   Column    |       Type       | Modifiers | Storage  | Stats target | Description 
+-------------+------------------+-----------+----------+--------------+-------------
+ time        | bigint           | not null  | plain    |              | 
+ device_id   | text             | not null  | extended |              | 
+ series_0    | double precision |           | plain    |              | 
+ series_1    | double precision |           | plain    |              | 
+ series_2    | double precision |           | plain    |              | 
+ series_bool | boolean          |           | plain    |              | 
+
                             Table "testNs._hyper_1_root"
    Column    |       Type       | Modifiers | Storage  | Stats target | Description 
 -------------+------------------+-----------+----------+--------------+-------------
@@ -438,6 +448,16 @@ Child tables: "testNs"._hyper_1_0_distinct
  value  | text | value      | extended
 primary key, btree, for table "testNs._hyper_1_distinct"
 
+                    Unlogged table "testNs._hyper_1_insert_temp"
+   Column    |       Type       | Modifiers | Storage  | Stats target | Description 
+-------------+------------------+-----------+----------+--------------+-------------
+ time        | bigint           | not null  | plain    |              | 
+ device_id   | text             | not null  | extended |              | 
+ series_0    | double precision |           | plain    |              | 
+ series_1    | double precision |           | plain    |              | 
+ series_2    | double precision |           | plain    |              | 
+ series_bool | boolean          |           | plain    |              | 
+
                             Table "testNs._hyper_1_root"
    Column    |       Type       | Modifiers | Storage  | Stats target | Description 
 -------------+------------------+-----------+----------+--------------+-------------

extension/sql/tests/regression/expected/query.out

@@ -53,9 +53,9 @@ CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_1)  WHERE series_1
 CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_2) WHERE series_2 IS NOT NULL;
 CREATE INDEX ON PUBLIC."testNs" (time DESC NULLS LAST, series_bool) WHERE series_bool IS NOT NULL;
 SELECT * FROM add_hypertable('"public"."testNs"', 'time', 'device_id', hypertable_name=>'testNs', associated_schema_name=>'testNs' );
-  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
+  name  | main_schema_name | main_table_name | associated_schema_name | associated_table_prefix | root_schema_name | root_table_name | distinct_schema_name | distinct_table_name | insert_temp_table_name | replication_factor | placement | time_field_name | time_field_type | created_on 
---------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+--------------------+-----------+-----------------+-----------------+------------
+--------+------------------+-----------------+------------------------+-------------------------+------------------+-----------------+----------------------+---------------------+------------------------+--------------------+-----------+-----------------+-----------------+------------
- testNs | public           | testNs          | testNs                 | _hyper_1                | testNs           | _hyper_1_root   | testNs               | _hyper_1_distinct   |                  1 | STICKY    | time            | bigint          | Test1
+ testNs | public           | testNs          | testNs                 | _hyper_1                | testNs           | _hyper_1_root   | testNs               | _hyper_1_distinct   | _hyper_1_insert_temp   |                  1 | STICKY    | time            | bigint          | Test1
 (1 row)
 
 SELECT set_is_distinct_flag('"public"."testNs"', 'device_id', TRUE);
@@ -319,6 +319,16 @@ Child tables: "testNs"._hyper_1_0_distinct
  value  | text | value      | extended
 primary key, btree, for table "testNs._hyper_1_distinct"
 
+                    Unlogged table "testNs._hyper_1_insert_temp"
+   Column    |       Type       | Modifiers | Storage  | Stats target | Description 
+-------------+------------------+-----------+----------+--------------+-------------
+ time        | bigint           | not null  | plain    |              | 
+ device_id   | text             | not null  | extended |              | 
+ series_0    | double precision |           | plain    |              | 
+ series_1    | double precision |           | plain    |              | 
+ series_2    | double precision |           | plain    |              | 
+ series_bool | boolean          |           | plain    |              | 
+
                             Table "testNs._hyper_1_root"
    Column    |       Type       | Modifiers | Storage  | Stats target | Description 
 -------------+------------------+-----------+----------+--------------+-------------
@@ -438,6 +448,16 @@ Child tables: "testNs"._hyper_1_0_distinct
  value  | text | value      | extended
 primary key, btree, for table "testNs._hyper_1_distinct"
 
+                    Unlogged table "testNs._hyper_1_insert_temp"
+   Column    |       Type       | Modifiers | Storage  | Stats target | Description 
+-------------+------------------+-----------+----------+--------------+-------------
+ time        | bigint           | not null  | plain    |              | 
+ device_id   | text             | not null  | extended |              | 
+ series_0    | double precision |           | plain    |              | 
+ series_1    | double precision |           | plain    |              | 
+ series_2    | double precision |           | plain    |              | 
+ series_bool | boolean          |           | plain    |              | 
+
                             Table "testNs._hyper_1_root"
    Column    |       Type       | Modifiers | Storage  | Stats target | Description 
 -------------+------------------+-----------+----------+--------------+-------------