Kazuaki Ishizaki created SPARK-15380:
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Summary: Generate code that stores a float/double value in each
column from ColumnarBatch when DataFrame.cache() is used
Key: SPARK-15380
URL: https://issues.apache.org/jira/browse/SPARK-15380
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Kazuaki Ishizaki
When DataFrame.cache() is called, data will be stored as column-oriented
storage in CachedBatch. The current Catalyst generates Java program to store a
computed value to an InternalRow and then the value is stored into CachedBatch
even if data is read from ColumnarBatch for ParquetReader.
This JIRA generates Java code to store a value into a ColumnarBatch, and store
data from the ColumnarBatch to the CachedBatch. This JIRA handles only float
and double types for a value.
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