spark-instrumented-optimizer/sql/hive
Dongjoon Hyun d66a4e82ec [SPARK-25102][SQL] Write Spark version to ORC/Parquet file metadata
## What changes were proposed in this pull request?

Currently, Spark writes Spark version number into Hive Table properties with `spark.sql.create.version`.
```
parameters:{
  spark.sql.sources.schema.part.0={
    "type":"struct",
    "fields":[{"name":"a","type":"integer","nullable":true,"metadata":{}}]
  },
  transient_lastDdlTime=1541142761,
  spark.sql.sources.schema.numParts=1,
  spark.sql.create.version=2.4.0
}
```

This PR aims to write Spark versions to ORC/Parquet file metadata with `org.apache.spark.sql.create.version` because we used `org.apache.` prefix in Parquet metadata already. It's different from Hive Table property key `spark.sql.create.version`, but it seems that we cannot change Hive Table property for backward compatibility.

After this PR, ORC and Parquet file generated by Spark will have the following metadata.

**ORC (`native` and `hive` implmentation)**
```
$ orc-tools meta /tmp/o
File Version: 0.12 with ...
...
User Metadata:
  org.apache.spark.sql.create.version=3.0.0
```

**PARQUET**
```
$ parquet-tools meta /tmp/p
...
creator:     parquet-mr version 1.10.0 (build 031a6654009e3b82020012a18434c582bd74c73a)
extra:       org.apache.spark.sql.create.version = 3.0.0
extra:       org.apache.spark.sql.parquet.row.metadata = {"type":"struct","fields":[{"name":"id","type":"long","nullable":false,"metadata":{}}]}
```

## How was this patch tested?

Pass the Jenkins with newly added test cases.

This closes #22255.

Closes #22932 from dongjoon-hyun/SPARK-25102.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: gatorsmile <gatorsmile@gmail.com>
2018-11-09 22:42:48 -08:00
..
benchmarks [SPARK-25964][SQL][MINOR] Revise OrcReadBenchmark/DataSourceReadBenchmark case names and execution instructions 2018-11-08 10:08:14 -08:00
compatibility/src/test/scala/org/apache/spark/sql/hive/execution Revert [SPARK-19355][SPARK-25352] 2018-09-20 20:18:31 +08:00
src [SPARK-25102][SQL] Write Spark version to ORC/Parquet file metadata 2018-11-09 22:42:48 -08:00
pom.xml [SPARK-25592] Setting version to 3.0.0-SNAPSHOT 2018-10-02 08:48:24 -07:00