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| author | Alexander Korotkov <akorotkov@postgresql.org> | 2019-03-16 12:15:37 +0300 |
|---|---|---|
| committer | Alexander Korotkov <akorotkov@postgresql.org> | 2019-03-16 12:16:48 +0300 |
| commit | 72b6460336e86ad5cafd3426af6013c7d8457367 (patch) | |
| tree | 8c590577fcfac501f24d7a282b529bea9d45c6d9 /src/include/regex/regex.h | |
| parent | 893d6f8a1f9b43da805124e93cbf0f7aea890ad4 (diff) | |
| download | postgresql-72b6460336e86ad5cafd3426af6013c7d8457367.tar.gz postgresql-72b6460336e86ad5cafd3426af6013c7d8457367.zip | |
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
Diffstat (limited to 'src/include/regex/regex.h')
| -rw-r--r-- | src/include/regex/regex.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/regex/regex.h b/src/include/regex/regex.h index 27fdc090409..23ad03d9304 100644 --- a/src/include/regex/regex.h +++ b/src/include/regex/regex.h @@ -167,10 +167,18 @@ typedef struct /* * the prototypes for exported functions */ + +/* regcomp.c */ extern int pg_regcomp(regex_t *, const pg_wchar *, size_t, int, Oid); extern int pg_regexec(regex_t *, const pg_wchar *, size_t, size_t, rm_detail_t *, size_t, regmatch_t[], int); extern int pg_regprefix(regex_t *, pg_wchar **, size_t *); extern void pg_regfree(regex_t *); extern size_t pg_regerror(int, const regex_t *, char *, size_t); +/* regexp.c */ +extern regex_t *RE_compile_and_cache(text *text_re, int cflags, Oid collation); +extern bool RE_compile_and_execute(text *text_re, char *dat, int dat_len, + int cflags, Oid collation, + int nmatch, regmatch_t *pmatch); + #endif /* _REGEX_H_ */ |