Improve documentation example for jsonpath like_regex operator

akorotkov · akorotkov · commit 9b7286c2b394 · 2021-05-13T16:10:21.000+03:00
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
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -17130,9 +17130,10 @@ $[*] ? (@ like_regex "^[aeiou]" flag "i")
      is a JSON path string literal, written according to the rules given in
      <xref linkend="datatype-jsonpath"/>.  This means in particular that any
      backslashes you want to use in the regular expression must be doubled.
-     For example, to match strings that contain only digits:
+     For example, to match string values of the root document that contain
+     only digits:
 <programlisting>
-$ ? (@ like_regex "^\\d+$")
+$.* ? (@ like_regex "^\\d+$")
 </programlisting>
     </para>
    </sect3>
