Alexander Korotkov cf98467242 Improve behavior of to_timestamp()/to_date() functions ... to_timestamp()/to_date() functions were introduced mainly for Oracle compatibility, and became very popular among PostgreSQL users. However, some behavior of to_timestamp()/to_date() functions are both incompatible with Oracle and confusing for our users. This behavior is related to handling of spaces and separators in non FX (fixed format) mode. This commit reworks this behavior making less confusing, better documented and more compatible with Oracle. Nevertheless, there are still following incompatibilities with Oracle. 1) We don't insist that there are no format string patterns unmatched to input string. 2) In FX mode we don't insist space and separators in format string to exactly match input string. 3) When format string patterns are divided by mix of spaces and separators, we don't distinguish them, while Oracle takes into account only last group of spaces/separators. Discussion: https://postgr.es/m/1873520224.1784572.1465833145330.JavaMail.yahoo%40mail.yahoo.com Author: Artur Zakirov, Alexander Korotkov, Liudmila Mantrova Review: Amul Sul, Robert Haas, Tom Lane, Dmitry Dolgov, David G. Johnston		2018-09-09 21:19:51 +03:00
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src	Improve behavior of to_timestamp()/to_date() functions	2018-09-09 21:19:51 +03:00
bug.template	Stamp HEAD as 12devel	2018-06-30 12:47:59 -04:00
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TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00