Peter Eisentraut 2991ac5fc9 Add SQL functions for Unicode normalization ... This adds SQL expressions NORMALIZE() and IS NORMALIZED to convert and check Unicode normal forms, per SQL standard. To support fast IS NORMALIZED tests, we pull in a new data file DerivedNormalizationProps.txt from Unicode and build a lookup table from that, using techniques similar to ones already used for other Unicode data. make update-unicode will keep it up to date. We only build and use these tables for the NFC and NFKC forms, because they are too big for NFD and NFKD and the improvement is not significant enough there. Reviewed-by: Daniel Verite <daniel@manitou-mail.org> Reviewed-by: Andreas Karlsson <andreas@proxel.se> Discussion: https://www.postgresql.org/message-id/flat/c1909f27-c269-2ed9-12f8-3ab72c8caf7a@2ndquadrant.com		2020-04-02 08:56:27 +02:00
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src	Add SQL functions for Unicode normalization	2020-04-02 08:56:27 +02:00
KNOWN_BUGS	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
Makefile	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
MISSING_FEATURES	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00