GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/15266
[SPARK-17693] [SQL] Fixed Insert Failure To Data Source Tables when the
Schema has the Comment Field
### What changes were proposed in this pull request?
```SQL
CREATE TABLE tab1(col1 int COMMENT 'a', col2 int) USING parquet
INSERT INTO TABLE tab1 SELECT 1, 2
```
The insert attempt will fail if the target table has a column with
comments. The error is strange to the external users:
```
assertion failed: No plan for InsertIntoTable Relation[col1#15,col2#16]
parquet, false, false
+- Project [1 AS col1#19, 2 AS col2#20]
+- OneRowRelation$
```
This PR is to fix the above bug by ignoring the metadata when comparing the
schema between the table and the query.
### How was this patch tested?
Added a test case
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark
insertDataSourceTableWithComment
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15266.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15266
----
commit ff0e7c7c84c12e2cd5277440538f453f019a6f8e
Author: gatorsmile <[email protected]>
Date: 2016-09-27T18:25:37Z
fix.
----
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