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Improve documentation example for jsonpath like_regex operator
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
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@ -16941,9 +16941,10 @@ $[*] ? (@ like_regex "^[aeiou]" flag "i")
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is a JSON path string literal, written according to the rules given in
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<xref linkend="datatype-jsonpath"/>. This means in particular that any
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backslashes you want to use in the regular expression must be doubled.
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For example, to match strings that contain only digits:
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For example, to match string values of the root document that contain
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only digits:
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<programlisting>
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$ ? (@ like_regex "^\\d+$")
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$.* ? (@ like_regex "^\\d+$")
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</programlisting>
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</para>
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</sect3>
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