如何将BigInteger从java传递到Postgres?

I need to pass a BigInteger argument to SQL query. (on Postgres 9.2) I have this code in my DAO:

我需要将BigInteger参数传递给SQL查询。(Postgres 9.2)我的DAO中有这个代码:

    public List<PersonInfo> select(String id) {
        BigInteger bigIntId = new BigInteger(id);
        JdbcTemplate select = new JdbcTemplate(dataSource);
        return select
            .query("SELECT * FROM PE.SUPPLIER_INPUT_DATA WHERE ID = ?",
                    new Object[] { bigIntId },
                    new PersonRowMapper());
    }

I am getting the following exception:

我有以下的例外:

{"error":"Error invoking getPersonInfoById.[org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; 
bad SQL grammar [SELECT * FROM PE.SUPPLIER_INPUT_DATA WHERE ID = ?]; 
nested exception is org.postgresql.util.PSQLException: 
Can't infer the SQL type to use for an instance of java.math.BigInteger. 
Use setObject() with an explicit Types value to specify the type to use.]"}

The id is of type bigint

id为bigint类型。

Tried to pass plain String - also throws type exception. Googled the message in the exception - no relevant result. Any ideas?

尝试传递纯字符串-也抛出类型异常。在异常情况下谷歌搜索了消息——没有相关结果。什么好主意吗?

4 个解决方案

#1

Support for BigInteger was added in JDBC 4.1 (Java 7), somehow I had missed that when I originally wrote this answer.

在JDBC 4.1 (Java 7)中添加了对BigInteger的支持，不知何故，我在最初编写这个答案时忽略了这一点。

Specifically section 3.1 Overview of changes of the JDBC 4.1 specification states:

具体第3.1节JDBC 4.1规范的变更概述:

• Additional Mappings to Table B-4, Mapping from Java Object to JDBC Types
  [..]
  Support was also added to map java.lang.BigInteger to JDBC BIGINT.
• 表B-4的附加映射，从Java对象到JDBC类型的映射[..]还向map java.lang添加了支持。BigInteger JDBC BIGINT。
• Additional Mappings to Table B-5, Performed by setObject and setNull between Java Object Types and Target JDBC Types
  [..]
  Allow conversion of java.lang.BigInteger to CHAR, VARCHAR, LONGVARCHAR, and BIGINT.
• 表B-5的附加映射，由setObject和setNull在Java对象类型和目标JDBC类型之间执行。允许java.lang的转换。从大整数到CHAR, VARCHAR, LONGVARCHAR，和BIGINT。

I'm not sure how well this is supported across drivers.

我不确定它在驱动程序之间的支持程度。

Original answer

The JDBC specification does not include support for BigInteger; you either need to use a different datatype (eg BigDecimal with scale 0), or find out if the PostgreSQL driver offers some implementation specific way to set a BigInteger value.

JDBC规范不包括对BigInteger的支持;您需要使用不同的数据类型(如带0刻度的BigDecimal)，或者查看PostgreSQL驱动程序是否提供了设置BigInteger值的特定实现方法。

#2

I had the same problem, using Types.BIGINT as a refinement works. I used it in combination with BatchPreparedStatementSetter, this is simple and very readable:

我也有同样的问题，使用类型。BIGINT是一种提纯。我将它与BatchPreparedStatementSetter结合使用，这很简单，也很容易读懂:

 @Transactional
public void saveStuff(List<Foo> foos) {
    int batchSize = foos.size();

    String sql = "INSERT INTO db.foo " +
            "(sting_id, a_big_integer, bar, ..etc ) " +
            "VALUES (?, ?, ?, ..etc )";

        jdbcTemplate.batchUpdate(sql, new BatchPreparedStatementSetter() {
            @Override
            public void setValues(PreparedStatement ps, int i) throws SQLException {
                FeedEntry feedEntry = feedEntries.get(i);
                int index = 1;
                ps.setString(index++, foo.id());
                ps.setObject(index++, foo.getTheBigInteger(), Types.BIGINT);
                ps.setString(index++, foo.bar())
                //etc
            }

            @Override
            public int getBatchSize() {
                return foos.size();
            }
        });

}

#3

You can use java.math.BigDecimal for conversion of BigInt. The below code should work:

您可以使用java.math。大十进制的转换。下面的代码应该可以工作:

public List<PersonInfo> select(String id) {

    BigDecimal bigDecId = new BigDecimal(id);
    JdbcTemplate select = new JdbcTemplate(dataSource);
    return select
        .query("SELECT * FROM PE.SUPPLIER_INPUT_DATA WHERE ID = ?",
                new Object[] { bigDecId },
                new PersonRowMapper());
}

#4

I had the same problem and I updated the driver from 9.3 to 42.2.2. Then worked fine

我遇到了同样的问题，我将驱动从9.3升级到42.2.2。然后工作得很好

    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>${postgresql.version}</version>
    </dependency>