无法在jooq

时间:2017-08-09 20:53:17

标签: java sql jooq

public class DestinationCustomBinding implements Binding<Object, Destination>{


    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private final Converter<Object, Destination> converter = new DestinationConverter();

    public Converter<Object, Destination> converter() {
        // TODO Auto-generated method stub

        return converter;
    }

    public void sql(BindingSQLContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
        Param<Integer> param = DSL.val(ctx.convert(converter).value(),Integer.class );

        ctx.render().visit(DSL.val(ctx.convert(converter).value(),Integer.class ));
    }

    public void register(BindingRegisterContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
        ctx.statement().registerOutParameter(ctx.index(), Types.JAVA_OBJECT);
    }

    public void set(BindingSetStatementContext<Destination> ctx) throws SQLException {


        ctx.statement().setObject(ctx.index(), ctx.convert(converter).value(), null);
     //      ctx.statement().setString(ctx.index(), Objects.toString(ctx.convert(converter).value(), null));
    }

    public void set(BindingSetSQLOutputContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
        throw new SQLFeatureNotSupportedException();
    }

    public void get(BindingGetResultSetContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
         ctx.convert(converter).value(ctx.resultSet().getObject(ctx.index()));
    }

    public void get(BindingGetStatementContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
        ctx.convert(converter).value(ctx.statement().getObject(ctx.index()));
    }

    public void get(BindingGetSQLInputContext<Destination> ctx) throws SQLException {
        // TODO Auto-generated method stub
        throw new SQLFeatureNotSupportedException();
    }

}

我想在public void set(BindingSetStatementContext ctx)中使用setObject而不是setString,但是我收到以下错误

Caused by: java.sql.SQLFeatureNotSupportedException: setObject not implemented
    at java.sql.PreparedStatement.setObject(PreparedStatement.java:1291)
    at org.jooq.tools.jdbc.DefaultPreparedStatement.setObject(DefaultPreparedStatement.java:371)
    at com.shn.analytics.db.connection.utils.DestinationCustomBinding.set(DestinationCustomBinding.java:53)
    at org.jooq.impl.DefaultBindContext.bindValue0(DefaultBindContext.java:62)
    at org.jooq.impl.AbstractBindContext.bindValue(AbstractBindContext.java:127)
    ... 11 more

用例:我正在使用crate db,它接受一个没有引号的Json(不是Json)对象 例如:

create table test_table ( 
  Id Integer, 
  name STRING, 
  test_Object OBJECT
);

insert into test_table(Id, test_Object) 
values (10, 'test_Name', {city = 'random_city'});

如何在jooq中实现这个用例

1 个答案:

答案 0 :(得分:4)

在许多JDBC驱动程序中,您不能使用PreparedStatement.setObject(index, null),因为JDBC驱动程序需要知道它应该通过线路连接到服务器的{{1>} 类型。我不知道crate.io在这里期待什么(它不是jOOQ中官方支持的数据库),但通常的选择是:

NULL

对于// Using String stmt.setString(index, null); // Use setNull() stmt.setNull(index, Types.OTHER); 方法,很可能是特定于供应商的setNull()值,比Types更具体。