[CONJ-791] correcting CallableStatement.getter for output parameter.

following methods :
getDate(int parameterIndex, Calendar cal)
getTimestamp(int parameterIndex)
getBlob(int parameterIndex)

where returning wrong index value when query did have value only IN before that index.

src/main/java/org/mariadb/jdbc/CallableProcedureStatement.java

@@ -336,7 +336,7 @@ public Date getDate(String parameterName, Calendar cal) throws SQLException {
 
   @Override
   public Date getDate(int parameterIndex, Calendar cal) throws SQLException {
-    return getOutputResult().getDate(parameterIndex, cal);
+    return getOutputResult().getDate(indexToOutputIndex(parameterIndex), cal);
   }
 
   @Override
@@ -361,7 +361,7 @@ public Time getTime(int parameterIndex) throws SQLException {
 
   @Override
   public Timestamp getTimestamp(int parameterIndex) throws SQLException {
-    return getOutputResult().getTimestamp(parameterIndex);
+    return getOutputResult().getTimestamp(indexToOutputIndex(parameterIndex));
   }
 
   @Override
@@ -431,7 +431,7 @@ public Ref getRef(String parameterName) throws SQLException {
 
   @Override
   public Blob getBlob(int parameterIndex) throws SQLException {
-    return getOutputResult().getBlob(parameterIndex);
+    return getOutputResult().getBlob(indexToOutputIndex(parameterIndex));
   }
 
   @Override

src/test/java/org/mariadb/jdbc/StoredProcedureTest.java

@@ -1662,4 +1662,18 @@ public void functionCaching() throws SQLException {
       assertFalse(st3.execute());
     }
   }
+
+  @Test
+  public void testTimestampParameterOutput() throws Exception {
+    createProcedure(
+        "CONJ791", "(IN a TEXT, OUT b DATETIME) \nBEGIN\nSET b := '2006-01-01 01:01:16';\nEND");
+
+    // registering with VARCHAR Type
+    CallableStatement cstmt = sharedConnection.prepareCall("{call CONJ791(?, ?)}");
+    cstmt.setString(1, "o");
+    cstmt.registerOutParameter(2, Types.TIMESTAMP);
+    cstmt.execute();
+
+    assertEquals(Timestamp.valueOf("2006-01-01 01:01:16"), cstmt.getTimestamp(2));
+  }
 }