[DBUTILS-41] Inserting/updating null in a timestamp field with PostgreSQL 8.x

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1

Environment

Linux CentOS 2.6.18-8.1.4.el5, PostgreSQL 8.2.4, Java 1.6.0_01

• Assignee: Unassigned
• Reporter: Malcolm McLean
• Created: 05/Oct/07 13:44
• Updated: 07/Mar/09 06:00
• Resolved: 25/Feb/09 10:05

Description

When inserting or updating a value to null on timestamp (date) field in a PostgreSQL database, the following error is returned:
column "foo" is of type timestamp without time zone but expression is of type character varying

Overriding the fillStatement method by doing something like:

QueryRunner run = new QueryRunner() {

      /* (non-Javadoc)
       * @see org.apache.commons.dbutils.QueryRunner#fillStatement(java.sql.PreparedStatement, java.lang.Object[])
       */
      @Override
      protected void fillStatement(PreparedStatement stmt, Object[] params) throws SQLException {
        if (params == null) {
          return;
        }
        for (int i = 0; i < params.length; i++) {
          if (params[i] != null) {
            stmt.setObject(i + 1, params[i]);
          } else {
            // VARCHAR works with many drivers regardless
            // of the actual column type (Maybe not with Postgres 8.x).  Oddly, NULL and
            // OTHER don't work with Oracle's drivers.
            stmt.setNull(i + 1, Types.NULL);
          }
        }
      }
    };

work, but it will have a problem if other databases are used instead of PostgreSQL.