jdbc调用中出现“未知数据类型”错误

Question

I'm trying to call a Postgres function in Java using a Callable Statement. One of the input parameter to the function is of type Timestamp. when I try to call the function from java, I get the following error.

ERROR: function insrt_data(character varying, integer, bigint, unknown, character varying) does not exist

My function signature is:

insrt_data(
i_cd character varying,
i_prog_id smallint,
i_stat_id bigint,
i_dt date,
i_stat_cd character varying) RETURNS character varying

My jdbc call is as below. StrtDt is a java.util.Date field.

String sql = "{call mySchema.insrt_data(?, ?, ?, ?, ?)}";    
java.sql.Date StartDt = new java.sql.Date(record.getStrtDt().getTime());
Map<String, Object> map = jdbcTemplate.call(connection -> {
            CallableStatement statement = connection.prepareCall(sql);
            statement.setString(1, record.getCd());
            statement.setInt(2, record.getProgId());
            statement.setLong(3, record.getId());
            statement.setDate(4, StartDt);
            statement.setString(5, record.getStatCd());
            statement.registerOutParameter(1, Types.VARCHAR);
            return statement;
        }, paramList);

Answer 1

The issue was with the i_prog_cd . The function expects a smallint as value while I was passing an int . Postgres's smallint corresponds to short in java. After changing it to short , the code worked!