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Refactor: extract __CDB_FS_Import_If_Not_Exists

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This commit is contained in:
Rafa de la Torre 2019-11-08 20:16:26 +01:00
parent 511e24a40e
commit 6700d24232
1 changed files with 21 additions and 18 deletions
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39
scripts-available/CDB_FederatedServerDiagnostics.sql
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@ -3,19 +3,14 @@
--------------------------------------------------------------------------------
--
-- Get the version of a remote PG server
-- Import a foreign table if it does not exist
--
CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Version_PG(server_internal name)
RETURNS text
CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal name, remote_schema name, remote_table name)
RETURNS void
AS $$
DECLARE
-- Import pg_settings from pg_catalog
remote_schema name := 'pg_catalog';
remote_table name := 'pg_settings';
local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
remote_server_version text;
BEGIN
-- Import the foreign pg_settings table
IF NOT EXISTS (
SELECT * FROM pg_class
WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
@ -24,6 +19,23 @@ BEGIN
EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
remote_schema, remote_table, server_internal, local_schema);
END IF;
END
$$
LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
--
-- Get the version of a remote PG server
--
CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Version_PG(server_internal name)
RETURNS text
AS $$
DECLARE
remote_schema name := 'pg_catalog';
remote_table name := 'pg_settings';
local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
remote_server_version text;
BEGIN
PERFORM @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal, remote_schema, remote_table);
BEGIN
EXECUTE format('
@ -47,21 +59,12 @@ CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_PostGIS_Version_PG(serve
RETURNS text
AS $$
DECLARE
-- Import pg_settings from pg_catalog
remote_schema name := 'pg_catalog';
remote_table name := 'pg_extension';
local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
remote_postgis_version text;
BEGIN
-- Import the foreign pg_extension table
IF NOT EXISTS (
SELECT * FROM pg_class
WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
AND relname = remote_table
) THEN
EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
remote_schema, remote_table, server_internal, local_schema);
END IF;
PERFORM @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal, remote_schema, remote_table);
BEGIN
EXECUTE format('