[WIP][SPARK-20824][SQL] Generate code to get value from table cache with wider column in ColumnarBatch #18194
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What changes were proposed in this pull request?
This PR waits for merging #18066
This PR adds compensation code for disabling the whole-stage codegen due to large number of columns.
When the whole-stage codegen is disabled, an iterator gets data from a row. Since the data is stored in columnar sotrage
CachedBatch, the iterator is generated to copy data from the columnar storage to a row.This PR supports only interger and double types. Another PR will support other data types.
How was this patch tested?
Added test suites into
InMemoryColumnarQuerySuite