postgresql/contrib/hstore
David Rowley 17a5871d9d Optimize escaping of JSON strings
There were quite a few places where we either had a non-NUL-terminated
string or a text Datum which we needed to call escape_json() on.  Many of
these places required that a temporary string was created due to the fact
that escape_json() needs a NUL-terminated cstring.  For text types, those
first had to be converted to cstring before calling escape_json() on them.

Here we introduce two new functions to make escaping JSON more optimal:

escape_json_text() can be given a text Datum to append onto the given
buffer.  This is more optimal as it foregoes the need to convert the text
Datum into a cstring.  A temporary allocation is only required if the text
Datum needs to be detoasted.

escape_json_with_len() can be used when the length of the cstring is
already known or the given string isn't NUL-terminated.  Having this
allows various places which were creating a temporary NUL-terminated
string to just call escape_json_with_len() without any temporary memory
allocations.

Discussion: https://postgr.es/m/CAApHDvpLXwMZvbCKcdGfU9XQjGCDm7tFpRdTXuB9PVgpNUYfEQ@mail.gmail.com
Reviewed-by: Melih Mutlu, Heikki Linnakangas
2024-07-27 23:46:07 +12:00
..
data
expected Handle \v as a whitespace character in parsers 2023-07-06 08:16:24 +09:00
sql Handle \v as a whitespace character in parsers 2023-07-06 08:16:24 +09:00
.gitignore
hstore_compat.c
hstore_gin.c
hstore_gist.c Use new overflow-safe integer comparison functions. 2024-02-16 14:05:36 -06:00
hstore_io.c Optimize escaping of JSON strings 2024-07-27 23:46:07 +12:00
hstore_op.c
hstore_subs.c Update copyright for 2024 2024-01-03 20:49:05 -05:00
hstore--1.1--1.2.sql
hstore--1.2--1.3.sql
hstore--1.3--1.4.sql
hstore--1.4--1.5.sql
hstore--1.4.sql
hstore--1.5--1.6.sql
hstore--1.6--1.7.sql
hstore--1.7--1.8.sql
hstore.control
hstore.h Fix final warnings produced by -Wshadow=compatible-local 2022-10-07 13:13:27 +13:00
Makefile hstore: Tighten key/value parsing check for whitespaces 2023-06-12 09:14:03 +09:00
meson.build Update copyright for 2024 2024-01-03 20:49:05 -05:00