[jira] [Created] (SPARK-31709) Proper base path for location when it is a relative path

["Kent Yao (Jira)" <ji...@apache.org>]

Kent Yao created SPARK-31709:
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             Summary: Proper base path for location when it is a relative path
                 Key: SPARK-31709
                 URL: https://issues.apache.org/jira/browse/SPARK-31709
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.5, 3.0.0, 3.1.0
            Reporter: Kent Yao


Currently, the user home directory is used as the base path for the database and table locations when their location is specified with a relative path, e.g.
{code:sql}
> set spark.sql.warehouse.dir;
spark.sql.warehouse.dir	file:/Users/kentyao/Downloads/spark/spark-3.1.0-SNAPSHOT-bin-20200512/spark-warehouse/
spark-sql> create database loctest location 'loctestdbdir';

spark-sql> desc database loctest;
Database Name	loctest
Comment
Location	file:/Users/kentyao/Downloads/spark/spark-3.1.0-SNAPSHOT-bin-20200512/loctestdbdir
Owner	kentyao

spark-sql> create table loctest(id int) location 'loctestdbdir';
spark-sql> desc formatted loctest;
id	int	NULL

# Detailed Table Information
Database	default
Table	loctest
Owner	kentyao
Created Time	Thu May 14 16:29:05 CST 2020
Last Access	UNKNOWN
Created By	Spark 3.1.0-SNAPSHOT
Type	EXTERNAL
Provider	parquet
Location	file:/Users/kentyao/Downloads/spark/spark-3.1.0-SNAPSHOT-bin-20200512/loctestdbdir
Serde Library	org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe
InputFormat	org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat
OutputFormat	org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat
{code}


The user home is not always warehouse-related, unchangeable in runtime, and shared both by database and table as the parent directory. Meanwhile, we use the table path as the parent directory for relative partition locations.

the config `spark.sql.warehouse.dir` represents the default location for managed databases and tables. For databases, the case above seems not to follow its semantics. For tables it is right but here I suggest enriching its meaning that is also for external tables with relative paths for locations.






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