--- a/postgres.rst	Wed Jan 02 00:27:39 2019 +0200
+++ b/postgres.rst	Wed Jan 02 00:55:00 2019 +0200
@@ -55,6 +55,12 @@
   SHOW hba_file;
   SHOW config_file;
 
+Check settings
+==============
+::
+
+   SELECT name, setting FROM pg_settings;
+
 List databases, schemas and tables
 ==================================
 
@@ -215,3 +221,12 @@
 
   $ psql -U $USER -h $HOST $DB -c "\\copy tbl_name from 'my.csv' csv"
 
+JDBC driver
+===========
+
+https://jdbc.postgresql.org/about/about.html
+  The current version of the driver should be compatible with PostgreSQL 8.2 and higher, and Java 6
+  (JDBC 4.0), Java 7 (JDBC 4.1), Java 8 (JDBC 4.2) and Java 9.
+https://jdbc.postgresql.org/download.html
+  Java/JDBC/Postgres compatibility table.
+