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Add table mappings to compression settings #6990

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Add table mappings to compression settings #6990

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Commits on Jun 4, 2024

  1. Add table mappings to compression settings 

    Refactor the compression settings metadata table to include a mapping
from a chunk's relid to its compressed chunk's relid.

Adding this mapping makes compression settings the main metadata table
for compression-related information, while decoupling it from chunk
metadata. This simplifies the code that looks up compression metadata
as it no longer requires first looking up the corresponding compressed
chunk.

The new compression settings is a step towards removing a chunk's
compression table from the chunk metadata. In other words, the
"compressed chunk" will no longer be a chunk, just a relation
associated with the regular chunk via compression settings.
    @erimatnor
    erimatnor committed Jun 4, 2024
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