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Index scan support for UPDATE/DELETE.
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During UPDATE/DELETE on compressed hypertables, we do a sequential
scan which can be improved by supporting index scans.

In this patch for a given UPDATE/DELETE query, if there are any
WHERE conditions specified using SEGMENT BY columns, we use index
scan to fetch all matching rows. Fetched rows will be decompressed
and moved to uncompressed chunk and a regular UPDATE/DELETE is
performed on the uncompressed chunk.
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sb230132 committed Jun 5, 2023
1 parent ecc1b7b commit 989d9db
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Implements: #5586 Index scan support during UPDATE/DELETE
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