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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/04/20 21:41:14 UTC
[GitHub] [spark] dilipbiswal opened a new pull request #24427: [SPARK-27531]
Improve explain output of describe table command to show the inputs to the
command.
dilipbiswal opened a new pull request #24427: [SPARK-27531] Improve explain output of describe table command to show the inputs to the command.
URL: https://github.com/apache/spark/pull/24427
## What changes were proposed in this pull request?
Currently "EXPLAIN DESC TABLE" is special cased and outputs a single row relation as following. This is not consistent with how we handle explain processing for other commands.
Current output:
```
spark-sql> EXPLAIN DESCRIBE TABLE t1;
== Physical Plan ==
*(1) Scan OneRowRelation[]
```
After change:
```
spark-sql> EXPLAIN DESC EXTENDED t
== Physical Plan ==
Execute DescribeTableCommand
+- DescribeTableCommand `t`, true
```
## How was this patch tested?
Added new tests in SQLQueryTestSuite.
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