GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/14047
[SPARK-16368] [SQL] Fix Strange Errors When Creating View With Unmatched
Column Num
#### What changes were proposed in this pull request?
When creating a view, a common user error is the number of columns produced
by the `SELECT` clause does not match the number of column names specified by
`CREATE VIEW`.
For example, given Table `t1` only has 3 columns
```SQL
create view v1(col2, col4, col3, col5) as select * from t1
```
Currently, Spark SQL reports the following error:
```
requirement failed
java.lang.IllegalArgumentException: requirement failed
at scala.Predef$.require(Predef.scala:212)
at
org.apache.spark.sql.execution.command.CreateViewCommand.run(views.scala:90)
```
This error message is very confusing. This PR is to detect the error and
issue a meaningful error message.
#### How was this patch tested?
Added test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark viewMismatchedColumns
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14047.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 #14047
----
commit 6210568c98e4e57e75fbf79fdefc40f258b5123e
Author: gatorsmile <[email protected]>
Date: 2016-07-04T18:38:20Z
fix
----
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