Teradata 如何在Tera数据中设置拼花地板文件的大小,使其超过16MB?
我有一个这样的sql,我不设置MAXOBJECTSIZE并使用Partition关键字Teradata 如何在Tera数据中设置拼花地板文件的大小,使其超过16MB?,teradata,Teradata,我有一个这样的sql,我不设置MAXOBJECTSIZE并使用Partition关键字 SELECT ObjectSize, RecordCount FROM WRITE_NOS_FM ( ON ( SELECT * FROM RiverFlowPerm_csv ) USING LOCATION('/s3/biXXXXXXX.s3.amazonaws.com/RiverFlowPerm/') STOREDAS('PARQUET') ) AS d ORDER BY AmpId;
SELECT ObjectSize, RecordCount
FROM WRITE_NOS_FM (
ON ( SELECT * FROM RiverFlowPerm_csv )
USING
LOCATION('/s3/biXXXXXXX.s3.amazonaws.com/RiverFlowPerm/')
STOREDAS('PARQUET')
) AS d
ORDER BY AmpId;
结果:
自动分区文件(每个文件16MB)
如何使拼花地板文件只保留一个文件(无分区)
当使用WRITE_NOS_FM时,这是撕裂数据中的拼花地板文件大小限制吗(最大单个文件大小为16MB,超过它时,它将被分区。)
在本参考文件中:
我的问题是拼花文件的页面大小是否等于拼花文件的文件大小限制?
Parquet Page Size
The maximum Parquet page size supported is 16 MB.
f some of the data in the Parquet record is binary,
the maximum numberof characters is proportionately reduced.