Add comments and fix linter problems

GitHubActions/detect_targets.sh

@@ -2,7 +2,7 @@
 
 ################################################################################
 #
-# This script detects target PostgreSQL versions for sqlite_fdw testing from 
+# This script detects target PostgreSQL versions for sqlite_fdw testing from
 # directory names in ./sql directory. Detected versions will be outputed to
 # the standard output as an array of string like ["15.4","16.0"].
 #

GitHubActions/install_locales.sh

@@ -6,7 +6,7 @@
 # tests in Ubuntu.
 #
 # Usage: ./install_locales.sh
-# 
+#
 # Requirements:
 # - having superuser privileges
 #

sqlite_fdw--1.0--1.1.sql

@@ -14,7 +14,13 @@ RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT PARALLEL RESTRICTED;
 
+COMMENT ON FUNCTION sqlite_fdw_disconnect(text)
+IS 'closes a SQLite connection by name of FOREIGN SERVER';
+
 CREATE FUNCTION sqlite_fdw_disconnect_all ()
 RETURNS bool
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT PARALLEL RESTRICTED;
+
+COMMENT ON FUNCTION sqlite_fdw_disconnect_all()
+IS 'closes all opened SQLite connections';

sqlite_fdw--1.0.sql

@@ -8,15 +8,24 @@ RETURNS fdw_handler
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
+COMMENT ON FUNCTION sqlite_fdw_handler()
+IS 'SQLite foreign data wrapper handler';
+
 CREATE FUNCTION sqlite_fdw_validator(text[], oid)
 RETURNS void
 AS 'MODULE_PATHNAME'
 LANGUAGE C STRICT;
 
+COMMENT ON FUNCTION sqlite_fdw_validator(text[], oid)
+IS 'SQLite foreign data wrapper options validator';
+
 CREATE FOREIGN DATA WRAPPER sqlite_fdw
   HANDLER sqlite_fdw_handler
   VALIDATOR sqlite_fdw_validator;
 
+COMMENT ON FOREIGN DATA WRAPPER sqlite_fdw
+IS 'SQLite foreign data wrapper';
+
 CREATE OR REPLACE FUNCTION sqlite_fdw_version()
   RETURNS pg_catalog.int4 STRICT
   AS 'MODULE_PATHNAME' LANGUAGE C;