sql

lib/sql/scripts-available/CDB_Conf.sql

@@ -0,0 +1,48 @@
+----------------------------------
+-- CONF MANAGEMENT FUNCTIONS
+--
+-- Meant to be used by superadmin user.
+-- Functions needing reading configuration should use SECURITY DEFINER.
+----------------------------------
+
+-- This will trigger NOTICE if @extschema@.CDB_CONF already exists
+DO LANGUAGE 'plpgsql' $$
+BEGIN
+    CREATE TABLE IF NOT EXISTS @extschema@.CDB_CONF ( KEY TEXT PRIMARY KEY, VALUE JSON NOT NULL );
+END
+$$;
+
+-- This can only be called from an SQL script executed by CREATE EXTENSION
+DO LANGUAGE 'plpgsql' $$
+BEGIN
+    PERFORM pg_catalog.pg_extension_config_dump('@extschema@.CDB_CONF', '');
+END
+$$;
+
+CREATE OR REPLACE
+FUNCTION @extschema@.CDB_Conf_SetConf(key text, value JSON)
+    RETURNS void AS $$
+BEGIN
+    PERFORM @extschema@.CDB_Conf_RemoveConf(key);
+    EXECUTE 'INSERT INTO @extschema@.CDB_CONF (KEY, VALUE) VALUES ($1, $2);' USING key, value;
+END
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+CREATE OR REPLACE
+FUNCTION @extschema@.CDB_Conf_RemoveConf(key text)
+    RETURNS void AS $$
+BEGIN
+    EXECUTE 'DELETE FROM @extschema@.CDB_CONF WHERE KEY = $1;' USING key;
+END
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+CREATE OR REPLACE
+FUNCTION @extschema@.CDB_Conf_GetConf(key text)
+    RETURNS JSON AS $$
+DECLARE
+    value JSON;
+BEGIN
+    EXECUTE 'SELECT VALUE FROM @extschema@.CDB_CONF WHERE KEY = $1;' INTO value USING key;
+    RETURN value;
+END
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;