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Documentation improvement for pg_trgm
Documentation of word_similarity() and strict_word_similarity() functions contains some vague wordings which could confuse users. This patch makes those wordings more clear. word_similarity() was introduced in PostgreSQL 9.6, and corresponding part of documentation needs to be backpatched. Author: Bruce Momjian, Alexander Korotkov Discussion: https://postgr.es/m/20180526165648.GB12510%40momjian.us Backpatch: 9.6, where word_similarity() was introduced
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This function returns a value that can be approximately understood as the
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greatest similarity between the first string and any substring of the second
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string. However, this function does not add padding to the boundaries of
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the extent. Thus, a whole word match gets a higher score than a match with
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a part of the word.
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the extent. Thus, the number of additional characters present in the
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second string is not considered, except for the mismatched word boundry.
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</para>
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<table id="pgtrgm-op-table">
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