fix(connection): pick keepAlive dialectOption (#7927)

lib/dialects/postgres/connection-manager.js

@@ -76,7 +76,10 @@ class ConnectionManager extends AbstractConnectionManager {
           // !! DONT SET THIS TO TRUE !!
           // !! DONT SET THIS TO TRUE !!
           // (unless you know what you're doing)
           // (unless you know what you're doing)
           // see [http://www.postgresql.org/message-id/flat/bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com#bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com]
           // see [http://www.postgresql.org/message-id/flat/bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com#bc9549a50706040852u27633f41ib1e6b09f8339d845@mail.gmail.com]
-          'binary'
+          'binary',
+          // This should help with backends incorrectly considering idle clients to be dead and prematurely disconnecting them.
+          // this feature has been added in pg module v6.0.0, check pg/CHANGELOG.md
+          'keepAlive'
         ]));
         ]));
     }
     }
 
 
@@ -149,7 +152,7 @@ class ConnectionManager extends AbstractConnectionManager {
       if (dataTypes.HSTORE.types.postgres.oids.length === 0 && supportedVersion) {
       if (dataTypes.HSTORE.types.postgres.oids.length === 0 && supportedVersion) {
         query += 'SELECT typname, oid, typarray FROM pg_type WHERE typtype = \'b\' AND typname IN (\'hstore\', \'geometry\', \'geography\')';
         query += 'SELECT typname, oid, typarray FROM pg_type WHERE typtype = \'b\' AND typname IN (\'hstore\', \'geometry\', \'geography\')';
       }
       }
-      
+
       return new Promise((resolve, reject) => {
       return new Promise((resolve, reject) => {
         connection.query(query)
         connection.query(query)
           .on('error', err => reject(err))
           .on('error', err => reject(err))