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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