Infromatica云-Snowflake连接器由于以下错误而无法从源读取数据：null

如何解决Infromatica云-Snowflake连接器由于以下错误而无法从源读取数据：null

我在IICS informatica云中雪花源的Advance属性的sql覆盖部分中使用自定义sql。 select (max(LAST_UPDATED_DATE)) from $$DB.test.org。 $$DB参数在参数文件$$DB=Dev中定义。参数在运行时正确解析，但低于错误。

READER_1_2_1> SNowFLAKECLOUDDATAWAREHOUSE_10000 [2020-10-30 03:07:00.440] [INFO] The SNowflake Connector uses the following sql query to read data: select (max(LAST_UPDATED_DATE)) from Dev.test.org
READER_1_2_1> CMN_1761 [2020-10-30 03:07:00.440] Timestamp Event: [Fri Oct 30 03:07:00 2020]
READER_1_2_1> SNowFLAKECLOUDDATAWAREHOUSE_10000 [2020-10-30 03:07:00.441] [ERROR] The SNowflake Connector Failed to read data from the source because of the following error: [SNowFlake_READER__Failed_906] The SNowflake Connector Failed to read data from the source because of the following error: null
READER_1_2_1> CMN_1761 [2020-10-30 03:07:00.441] Timestamp Event: [Fri Oct 30 03:07:00 2020]
READER_1_2_1> SNowFLAKECLOUDDATAWAREHOUSE_10000 [2020-10-30 03:07:00.441] [ERROR] Error occured while reading data using CCI Data Adapter  com.informatica.cci.runtime.internal.utils.impl.CExceptionImpl: Unable to get result data: Adapter read method has returned failure.
READER_1_2_1> CMN_1761 [2020-10-30 03:07:00.441] Timestamp Event: [Fri Oct 30 03:07:00 2020]
READER_1_2_1> CONNECTOR_10000 [2020-10-30 03:07:00.441] [ERROR] Error Occured while reading data from the source for Transformation - SRC_Organization | Connector Name - SNowflakeCloudDataWarehouse - Unable to get result data: Adapter read method has returned failure.

预先感谢。

解决方法

问题出在列列表上。自定义查询应类似于$$（$$ DB.test.org）中的select（max（LAST_UPDATED_DATE））作为LAST_UPDATED_DATE，并且字段列表应仅包含一列LAST_UPDATED_DATE。映射现在可以正常工作了。