JDBC 调用中"Unknown data type"错误

Question

我试图在Java中使用可调用语句调用Postgres函数。该函数的一个输入参数是Timestamp类型的。当我尝试从java调用该函数时，我得到以下错误:

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

我的函数签名是:

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

我的jdbc调用如下。StrtDt是java.util.Date字段。

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

问题出在i_prog_cd。当我传递int时，函数期望smallint作为值。Postgres的smallint对应于java中的short。将其更改为short后，代码工作了!