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Improve documentation example for jsonpath like_regex operator

author Alexander Korotkov <akorotkov@postgresql.org>

2021年5月13日 13:10:21 +0000 (16:10 +0300)

committer Alexander Korotkov <akorotkov@postgresql.org>

2021年5月13日 13:10:21 +0000 (16:10 +0300)

Make sample like_regex match string values of the root object instead of the
whole document. The corrected example seems to represent a more relevant
use case.

Backpatch to 12, when jsonpath was introduced.

Discussion: https://postgr.es/m/13440f8b-4c1f-5875-c8e3-f3f65606af2f%40xs4all.nl
Author: Erik Rijkers
Reviewed-by: Michael Paquier, Alexander Korotkov
Backpatch-through: 12

doc/src/sgml/func.sgml patch | blob | blame | history

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml

index 4d1f1794ca336eb1d2fe0f489ab111f41ecc0858..3a21129021adae0b3396c3be72d374b9966fd985 100644 (file)

--- a/doc/src/sgml/func.sgml

+++ b/doc/src/sgml/func.sgml

@@ -17130,9 +17130,10 @@ $[*] ? (@ like_regex "^[aeiou]" flag "i")

is a JSON path string literal, written according to the rules given in

<xref linkend="datatype-jsonpath"/>. This means in particular that any

backslashes you want to use in the regular expression must be doubled.

- For example, to match strings that contain only digits:

+ For example, to match string values of the root document that contain

+ only digits:

-$ ? (@ like_regex "^\\d+$")

+$.* ? (@ like_regex "^\\d+$")

</programlisting>

</para>

</sect3>

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