tuming created SPARK-17198:
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Summary: ORC fixed char literal filter does not work
Key: SPARK-17198
URL: https://issues.apache.org/jira/browse/SPARK-17198
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.5.1
Reporter: tuming
I have got wrong result when I run the following query in SparkSQL.
select * from orc_table where char_col ='5LZS';
Table orc_table is a ORC format table.
Column char_col is defined as char(6).
The hive record reader will return a char(6) string to the spark. And the spark
has no fixed char type. All fixed char type attributes are converted to String
by default. Meanwhile the constant literal is parsed to a string Literal. So
it won't return true forever while doing the equal comparison. For instance:
'5LZS'=='5LZS '.
But I can get correct result in Hive using same data and sql string because
hive append spaces for those constant literal. Please refer to:
https://issues.apache.org/jira/browse/HIVE-11312
I found there is no such patch for spark.
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