9 Commits (b55413d77f96b9fa2dfae4ddec43412b90ebf588)

Author	SHA1	Message	Date
Alexander Korotkov	bffe1bd684	Implement jsonpath .datetime() method ... This commit implements jsonpath .datetime() method as it's specified in SQL/JSON standard. There are no-argument and single-argument versions of this method. No-argument version selects first of ISO datetime formats matching input string. Single-argument version accepts template string as its argument. Additionally to .datetime() method itself this commit also implements comparison ability of resulting date and time values. There is some difficulty because exising jsonb_path_*() functions are immutable, while comparison of timezoned and non-timezoned types involves current timezone. At first, current timezone could be changes in session. Moreover, timezones themselves are not immutable and could be updated. This is why we let existing immutable functions throw errors on such non-immutable comparison. In the same time this commit provides jsonb_path_*_tz() functions which are stable and support operations involving timezones. As new functions are added to the system catalog, catversion is bumped. Support of .datetime() method was the only blocker prevents T832 from being marked as supported. sql_features.txt is updated correspondingly. Extracted from original patch by Nikita Glukhov, Teodor Sigaev, Oleg Bartunov. Heavily revised by me. Comments were adjusted by Liudmila Mantrova. Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com Discussion: https://postgr.es/m/CAPpHfdsZgYEra_PeCLGNoXOWYx6iU-S3wF8aX0ObQUcZU%2B4XTw%40mail.gmail.com Author: Alexander Korotkov, Nikita Glukhov, Teodor Sigaev, Oleg Bartunov, Liudmila Mantrova Reviewed-by: Anastasia Lubennikova, Peter Eisentraut	6 years ago
Tom Lane	d5b90cd648	Fix bogus handling of XQuery regex option flags. ... The SQL spec defers to XQuery to define what the option flags are for LIKE_REGEX patterns. XQuery says that: * 's' allows the dot character to match newlines, which by default it will not; * 'm' allows ^ and $ to match at newlines, not only at the start/end of the whole string. Thus, these are *not* inverses as they are for the similarly-named POSIX options, and neither one corresponds to the POSIX 'n' option. Fortunately, Spencer's library does expose these two behaviors as separately twiddlable flags, so we just have to fix the mapping from JSP flag bits to REG flag bits. I also chose to rename the symbol for 's' to DOTALL, to make it clearer that it's not the inverse of MLINE. Also, XQuery says that if the 'q' flag "is used together with the m, s, or x flag, that flag has no effect". I read this as saying that 'q' overrides the other flags; whoever wrote our code seems to have read it backwards. Lastly, while XQuery's 'x' flag is related to what Spencer's code does for REG_EXPANDED, it's not the same or a subset. It seems best to treat XQuery's 'x' as unimplemented for now. Maybe later we can expand our regex code to offer 'x'-style parsing as a separate option. While at it, refactor the jsonpath code so that (a) there's only one copy of the flag transformation logic not two, and (b) the processing of flags is independent of the order in which the flags are written. We need some documentation updates to go with this, but I'll tackle that separately. Back-patch to v12 where this code originated. Discussion: https://postgr.es/m/CAPpHfdvDci4iqNF9fhRkTqhe-5_8HmzeLt56drH%2B_Rv2rNRqfg@mail.gmail.com Reference: https://www.w3.org/TR/2017/REC-xpath-functions-31-20170321/#flags	6 years ago
Alexander Korotkov	261a5c1928	Support 'q' flag in jsonpath 'like_regex' predicate ... SQL/JSON standard defines that jsonpath 'like_regex' predicate should support the same set of flags as XQuery/XPath. It appears that implementation of 'q' flag was missed. This commit fixes that. Discussion: https://postgr.es/m/CAPpHfdtyfPsxLYiTjp5Ov8T5xGsB5t3CwE5%2B3PS%3DLLwA%2BxTJog%40mail.gmail.com Author: Nikita Glukhov, Alexander Korotkov	7 years ago
Michael Paquier	1fb6f62a84	Fix typos in various places ... Author: Andrea Gelmini Reviewed-by: Michael Paquier, Justin Pryzby Discussion: https://postgr.es/m/20190528181718.GA39034@glet	7 years ago
Tom Lane	8255c7a5ee	Phase 2 pgindent run for v12. ... Switch to 2.1 version of pg_bsd_indent. This formats multiline function declarations "correctly", that is with additional lines of parameter declarations indented to match where the first line's left parenthesis is. Discussion: https://postgr.es/m/CAEepm=0P3FeTXRcU5B2W3jv3PgRVZ-kGUXLGfd42FFhUROO3ug@mail.gmail.com	7 years ago
Alvaro Herrera	75445c1515	More message style fixes ... Discussion: https://postgr.es/m/20190515183005.GA26486@alvherre.pgsql	7 years ago
Tom Lane	e481d26285	Clean up minor warnings from buildfarm. ... Be more consistent about use of XXXGetDatum macros in new jsonpath code. This is mostly to avoid having code that looks randomly different from everyplace else that's doing the exact same thing. In pg_regress.c, avoid an unreferenced-function warning from compilers that don't understand pg_attribute_unused(). Putting the function inside the same #ifdef as its only caller is more straightforward coding anyway. In be-secure-openssl.c, avoid use of pg_attribute_unused() on a label. That's pretty creative, but there's no good reason to suppose that it's portable, and there's absolutely no need to use goto's here in the first place. (This wasn't actually causing any buildfarm complaints, but it's new code in v12 so it has no portability track record.)	7 years ago
Tom Lane	20f7c3d560	Suppress -Wimplicit-fallthrough warnings in new jsonpath code. ... Per buildfarm. See commit 41c912cad for precedent.	7 years ago
Alexander Korotkov	72b6460336	Partial implementation of SQL/JSON path language ... SQL 2016 standards among other things contains set of SQL/JSON features for JSON processing inside of relational database. The core of SQL/JSON is JSON path language, allowing access parts of JSON documents and make computations over them. This commit implements partial support JSON path language as separate datatype called "jsonpath". The implementation is partial because it's lacking datetime support and suppression of numeric errors. Missing features will be added later by separate commits. Support of SQL/JSON features requires implementation of separate nodes, and it will be considered in subsequent patches. This commit includes following set of plain functions, allowing to execute jsonpath over jsonb values: * jsonb_path_exists(jsonb, jsonpath[, jsonb, bool]), * jsonb_path_match(jsonb, jsonpath[, jsonb, bool]), * jsonb_path_query(jsonb, jsonpath[, jsonb, bool]), * jsonb_path_query_array(jsonb, jsonpath[, jsonb, bool]). * jsonb_path_query_first(jsonb, jsonpath[, jsonb, bool]). This commit also implements "jsonb @? jsonpath" and "jsonb @@ jsonpath", which are wrappers over jsonpath_exists(jsonb, jsonpath) and jsonpath_predicate(jsonb, jsonpath) correspondingly. These operators will have an index support (implemented in subsequent patches). Catversion bumped, to add new functions and operators. Code was written by Nikita Glukhov and Teodor Sigaev, revised by me. Documentation was written by Oleg Bartunov and Liudmila Mantrova. The work was inspired by Oleg Bartunov. Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com Author: Nikita Glukhov, Teodor Sigaev, Alexander Korotkov, Oleg Bartunov, Liudmila Mantrova Reviewed-by: Tomas Vondra, Andrew Dunstan, Pavel Stehule, Alexander Korotkov	7 years ago