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Posted to issues@spark.apache.org by "Yuming Wang (JIRA)" <ji...@apache.org> on 2018/07/10 15:28:00 UTC
[jira] [Created] (SPARK-24766) CreateHiveTableAsSelectCommand and
InsertIntoHiveDirCommand won't generate decimal column stats
Yuming Wang created SPARK-24766:
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Summary: CreateHiveTableAsSelectCommand and InsertIntoHiveDirCommand won't generate decimal column stats
Key: SPARK-24766
URL: https://issues.apache.org/jira/browse/SPARK-24766
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.0
Reporter: Yuming Wang
How to reproduce:
{code:java}
INSERT OVERWRITE LOCAL DIRECTORY '/tmp/spark/parquet/dir' STORED AS parquet select cast(1 as decimal) as decimal1;
{code}
{code:java}
create table test_parquet stored as parquet as select cast(1 as decimal) as decimal1;
{code}
{noformat}
LM-SHC-16502798:parquet-mr yumwang$ java -jar ./parquet-tools/target/parquet-tools-1.10.1-SNAPSHOT.jar meta file:/tmp/spark/parquet/dir/part-00000-cb96a617-4759-4b21-a222-2153ca0e8951-c000
file: file:/tmp/spark/parquet/dir/part-00000-cb96a617-4759-4b21-a222-2153ca0e8951-c000
creator: parquet-mr version 1.6.0 (build 6aa21f8776625b5fa6b18059cfebe7549f2e00cb)
file schema: hive_schema
--------------------------------------------------------------------------------
decimal1: OPTIONAL FIXED_LEN_BYTE_ARRAY O:DECIMAL R:0 D:1
row group 1: RC:1 TS:46 OFFSET:4
--------------------------------------------------------------------------------
decimal1: FIXED_LEN_BYTE_ARRAY SNAPPY DO:0 FPO:4 SZ:48/46/0.96 VC:1 ENC:BIT_PACKED,PLAIN,RLE ST:[no stats for this column]
{noformat}
because spark still use com.twitter.parquet-hadoop-bundle.1.6.0.
May be we should refactor {{CreateHiveTableAsSelectCommand}} and {{InsertIntoHiveDirCommand}} or [update built-in Hive|https://issues.apache.org/jira/browse/SPARK-23710].
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