[parquet] Child vector of complex type should arrange elements compactly (like orc) #3883
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…s compactly (like orc) (apache#3883)" This reverts commit fd7ab43
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…olumn vectors like orc (apache#4745) (cherry picked from commit b50040a)
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Purpose
For orc, if we have 4 rows of
ARRAY<ARRAY<STRING>: [[0, null], [1], [], null], [2], [], null]. The data layout is:Currently, the parquet format layout is not same. For example, the inner
IntVectorwill have more than one null value (that is ,the empty and null array will be set as null value in inner vector). This PR make parquet to be consistent with orc.Tests
API and Format
Documentation