[SPARK-18917][SQL] Remove schema check in appending data #16622
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Test build #71524 has finished for PR 16622 at commit
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LGTM |
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Merging in master. |
uzadude
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## What changes were proposed in this pull request? In append mode, we check whether the schema of the write is compatible with the schema of the existing data. It can be a significant performance issue in cloud environment to find the existing schema for files. This patch removes the check. Note that for catalog tables, we always do the check, as discussed in apache#16339 (comment) ## How was this patch tested? N/A Closes apache#16339. Author: Reynold Xin <[email protected]> Closes apache#16622 from rxin/SPARK-18917.
cmonkey
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Feb 15, 2017
## What changes were proposed in this pull request? In append mode, we check whether the schema of the write is compatible with the schema of the existing data. It can be a significant performance issue in cloud environment to find the existing schema for files. This patch removes the check. Note that for catalog tables, we always do the check, as discussed in apache#16339 (comment) ## How was this patch tested? N/A Closes apache#16339. Author: Reynold Xin <[email protected]> Closes apache#16622 from rxin/SPARK-18917.
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What changes were proposed in this pull request?
In append mode, we check whether the schema of the write is compatible with the schema of the existing data. It can be a significant performance issue in cloud environment to find the existing schema for files. This patch removes the check.
Note that for catalog tables, we always do the check, as discussed in #16339 (comment)
How was this patch tested?
N/A
Closes #16339.