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[SPARK-18917][SQL] Remove schema check in appending data - #16622
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SparkQA
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Jan 17, 2017
Test build #71524 has finished for PR 16622 at commit
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gatorsmile
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Jan 17, 2017
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LGTM |
rxin
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Jan 17, 2017
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Merging in master. |
uzadude pushed a commit
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Jan 27, 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 Closesapache#16339. Author: Reynold Xin <rxin@databricks.com> Closesapache#16622 from rxin/SPARK-18917.
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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 Closesapache#16339. Author: Reynold Xin <rxin@databricks.com> Closesapache#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.