May 17, 2026, 11:40 PM

inbox/DataBase/Oracle/dba_scripts/flip_database_connect.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+# Disables or Enables connections to specified database
+
+PORT=""
+USER=""
+
+usage() {
+    echo "Usage: $0 -d <dbname> [-p <port> -U <user>]"
+    echo Database name to disable/enable is required
+    exit 1
+}
+
+while getopts "d:p:U:u" OPT;
+do case "${OPT}" in
+      d) DBNAME=$OPTARG
+	 ;;
+      p) PORT="-p $OPTARG"
+	 ;;
+      U) USER="-U $OPTARG"
+	 ;;
+      u) usage
+	 ;;
+    [?]) usage
+   esac;
+done
+
+
+if [ "$DBNAME" = "" ]
+  then
+    usage
+    exit 1
+fi
+
+if [ $DBNAME == "postgres" ]
+  then
+    echo Disable of postgres is prohibited
+    exit
+fi
+
+echo changing $DBNAME
+
+psql $PORT $USER -v ON_ERROR_STOP=on postgres  <<_EOF_
+SELECT datname, datallowconn
+  FROM pg_database
+  WHERE datname = '$DBNAME' ;
+
+UPDATE pg_database
+  SET datallowconn = CASE
+		     WHEN datallowconn = TRUE THEN
+		       FALSE
+		     ELSE
+		       TRUE
+		     END
+WHERE datname = '$DBNAME' ;
+
+SELECT datname, datallowconn
+  FROM pg_database
+    WHERE datname = '$DBNAME' ;
+
+\echo Connect status for $DBNAME has been reversed
+
+_EOF_
+