feat: Drop support for pg 9.6

test/spec/fixtures/data.sql

@@ -680,14 +680,12 @@ INSERT INTO private.films (id, title) VALUES (12,'douze commandements'), (2001,'
 TRUNCATE TABLE private.personnages CASCADE;
 INSERT INTO private.personnages (film_id, role_id, character) VALUES (12,1,'méchant'), (2001,2,'astronaute');
 
-DO $do$BEGIN
-  IF (SELECT current_setting('server_version_num')::INT >= 100000) THEN
-    INSERT INTO test.car_models(name, year) VALUES ('DeLorean',1981);
-    INSERT INTO test.car_models(name, year) VALUES ('F310-B',1997);
-    INSERT INTO test.car_models(name, year) VALUES ('Veneno',2013);
-    INSERT INTO test.car_models(name, year) VALUES ('Murcielago',2001);
-  END IF;
+INSERT INTO test.car_models(name, year) VALUES ('DeLorean',1981);
+INSERT INTO test.car_models(name, year) VALUES ('F310-B',1997);
+INSERT INTO test.car_models(name, year) VALUES ('Veneno',2013);
+INSERT INTO test.car_models(name, year) VALUES ('Murcielago',2001);
 
+DO $do$BEGIN
   IF (SELECT current_setting('server_version_num')::INT >= 110000) THEN
     INSERT INTO test.car_brands(name) VALUES ('DMC');
     INSERT INTO test.car_brands(name) VALUES ('Ferrari');

test/spec/fixtures/privileges.sql

@@ -41,13 +41,7 @@ GRANT USAGE ON SEQUENCE
     , leak_id_seq
 TO postgrest_test_anonymous;
 
-DO $do$
-BEGIN
-  IF current_setting('server_version_num')::INT >= 100000 THEN
-    GRANT USAGE ON SEQUENCE channels_id_seq TO postgrest_test_anonymous;
-  END IF;
-END
-$do$;
+GRANT USAGE ON SEQUENCE channels_id_seq TO postgrest_test_anonymous;
 
 -- Privileges for non anonymous users
 GRANT USAGE ON SCHEMA test TO postgrest_test_author;

test/spec/fixtures/schema.sql

@@ -2289,26 +2289,22 @@ create table private.rollen (
 );
 
 -- Tables used for testing embedding between partitioned tables
+create table test.car_models(
+  name varchar(64) not null,
+  year int not null
+) partition by list (year);
 
-do $do$begin
-    -- partitioned tables using the PARTITION syntax are supported from pg v10
-    if (select current_setting('server_version_num')::int >= 100000) then
-      create table test.car_models(
-        name varchar(64) not null,
-        year int not null
-      ) partition by list (year);
-
-      comment on table test.car_models is
-      $$A partitioned table
+comment on table test.car_models is
+$$A partitioned table
 
 A test for partitioned tables$$;
 
-      create table test.car_models_2021 partition of test.car_models
-        for values in (2021);
-      create table test.car_models_default partition of test.car_models
-        for values in (1981,1997,2001,2013);
-    end if;
+create table test.car_models_2021 partition of test.car_models
+  for values in (2021);
+create table test.car_models_default partition of test.car_models
+  for values in (1981,1997,2001,2013);
 
+do $do$begin
     -- primary keys for partitioned tables are supported from pg v11
     if (select current_setting('server_version_num')::int >= 110000) then
       create table test.car_brands (
@@ -2492,22 +2488,15 @@ BEGIN
 END$$;
 
 -- This view is not used in any requests but just parsed by the pfkSourceColumns query.
--- XMLTABLE is only supported from PG 10 on
-DO $do$
-BEGIN
-  IF current_setting('server_version_num')::INT >= 100000 THEN
-    CREATE VIEW test.xml AS
-    SELECT *
-      FROM (SELECT ''::xml AS data) _,
-           XMLTABLE(
-             ''
-             PASSING data
-             COLUMNS id int PATH '@id',
-                     premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'
-           );
-  END IF;
-END
-$do$;
+CREATE VIEW test.xml AS
+SELECT *
+  FROM (SELECT ''::xml AS data) _,
+       XMLTABLE(
+         ''
+         PASSING data
+         COLUMNS id int PATH '@id',
+                 premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'
+       );
 
 -- https://github.com/PostgREST/postgrest/issues/1543
 CREATE TYPE complex AS (
@@ -3277,17 +3266,11 @@ create table test.tbl_w_json(
   data json
 );
 
-DO $do$
-BEGIN
-  IF current_setting('server_version_num')::INT >= 100000 THEN
-    CREATE TABLE test.channels (
-      id bigint GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
-      data jsonb DEFAULT '{"foo": "bar"}',
-      slug text
-    );
-  END IF;
-END
-$do$;
+CREATE TABLE test.channels (
+  id bigint GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+  data jsonb DEFAULT '{"foo": "bar"}',
+  slug text
+);
 
 CREATE FUNCTION test.is_superuser() RETURNS boolean
 LANGUAGE sql