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base repository: postgresql-cfbot/postgresql
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base: cf/5209~1
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head repository: postgresql-cfbot/postgresql
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compare: cf/5209
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  • 2 commits
  • 3 files changed
  • 2 contributors

Commits on Feb 20, 2025

  1. Support POSITION with nondeterministic collations 

    This allows using text position search functions with nondeterministic
collations.  These functions are

- position, strpos
- replace
- split_part
- string_to_array
- string_to_table

which all use common internal infrastructure.

There was previously no internal implementation of this, so it was met
with a not-supported error.  This adds the internal implementation and
removes the error.

Unlike with deterministic collations, the search cannot use any
byte-by-byte optimized techniques but has to go substring by
substring.  We also need to consider that the found match could have a
different length than the needle and that there could be substrings of
different length matching at a position.  In most cases, we need to
find the longest such substring (greedy semantics).

Discussion: https://www.postgresql.org/message-id/flat/[email protected]
    @petere
    petere authored and Commitfest Bot committed Feb 20, 2025
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  2. [CF 5209] v2 - Support POSITION with nondeterministic collations 

    This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5209

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/[email protected]
Author(s): Peter Eisentraut
    Commitfest Bot committed Feb 20, 2025
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