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| author | KaiXinXiaoLei <huleilei1@huawei.com> | 2015-08-02 20:04:21 -0700 |
|---|---|---|
| committer | Reynold Xin <rxin@databricks.com> | 2015-08-02 20:04:21 -0700 |
| commit | 536d2adc12c88ff67b5dde3dec998bcacef50fba (patch) | |
| tree | a7d32b775cca386ec3e9bf24025f9ea47c838ac9 /docs | |
| parent | 9d03ad910b853c1e0dcb946b05d48ab36a1ac533 (diff) | |
| download | spark-536d2adc12c88ff67b5dde3dec998bcacef50fba.tar.gz spark-536d2adc12c88ff67b5dde3dec998bcacef50fba.tar.bz2 spark-536d2adc12c88ff67b5dde3dec998bcacef50fba.zip | |
[SPARK-9535][SQL][DOCS] Modify document for codegen.
#7142 made codegen enabled by default so let's modify the corresponding documents.
Closes #7142
Author: KaiXinXiaoLei <huleilei1@huawei.com>
Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Closes #7863 from sarutak/SPARK-9535 and squashes the following commits:
0884424 [Kousuke Saruta] Removed a line which mentioned about the effect of codegen enabled
3c11af0 [Kousuke Saruta] Merge branch 'sqlconfig' of https://github.com/KaiXinXiaoLei/spark into SPARK-9535
4ee531d [KaiXinXiaoLei] delete space
4cfd11d [KaiXinXiaoLei] change spark.sql.planner.externalSort
d624cf8 [KaiXinXiaoLei] sql config is wrong
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/sql-programming-guide.md | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md index d31baa080c..3ea77e8242 100644 --- a/docs/sql-programming-guide.md +++ b/docs/sql-programming-guide.md @@ -1885,11 +1885,10 @@ that these options will be deprecated in future release as more optimizations ar </tr> <tr> <td><code>spark.sql.codegen</code></td> - <td>false</td> + <td>true</td> <td> When true, code will be dynamically generated at runtime for expression evaluation in a specific - query. For some queries with complicated expression this option can lead to significant speed-ups. - However, for simple queries this can actually slow down query execution. + query. For some queries with complicated expression this option can lead to significant speed-ups. </td> </tr> <tr> @@ -1901,7 +1900,7 @@ that these options will be deprecated in future release as more optimizations ar </tr> <tr> <td><code>spark.sql.planner.externalSort</code></td> - <td>false</td> + <td>true</td> <td> When true, performs sorts spilling to disk as needed otherwise sort each partition in memory. </td> |