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Display Posting Length for index entries with segment posting format#39

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LimarDeWills wants to merge 1 commit intodf7cb:masterfrom
LimarDeWills:add-posting-length-display
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Display Posting Length for index entries with segment posting format#39
LimarDeWills wants to merge 1 commit intodf7cb:masterfrom
LimarDeWills:add-posting-length-display

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Show posting list length for B-tree index tuples.

  1. pg_filedump now detects posting list tuples (BTreeTupleIsPosting(), Postgres >= 13) and prints Posting Length: <n> where n is the number of TIDs in the list.
  2. Regression tests updated to cover the new output on Postgres >= 13.

The change makes it easier to see how many TIDs are stored in each posting list when inspecting deduplicated B-tree pages.

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