Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/15789
Hi, @rxin .
Yep. The actual issue is the current code generates the new golden files in
the following folder. So, we cannot identify which file is changed and cannot
commit the newly generated files easily.
```
.../spark/sql/hive/target/scala-2.11/test-classes/sqlgen
```
When we added this module initially, we faced the exactly same issue and
decided to use the absolute path and to assume the following command in the
source tree root.
```
SPARK_GENERATE_GOLDEN_FILES=1 build/sbt "hive/test-only
*LogicalPlanToSQLSuite"
```
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