The function xmlexists evaluates an XPath 1.0 expression (the first argument), with the passed XML value as its context item. The function returns false if the result of that evaluation yields an empty node-set, true if it yields any other value. The function returns null if any argument is null. A nonnull value passed as the context item must be an XML document, not a content fragment or any non-XML value.
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xmlexists evaluates an XPath 1.0 expression (the first argument), with the passed XML value as its context item. The function returns false if the result of that evaluation yields an empty node-set, true if it yields any other value. The function returns null if any argument is null. A nonnull value passed as the context item must be an XML document, not a content fragment or any non-XML value.XMLEXISTS ( text PASSING [BY {REF|VALUE}] xml [BY {REF|VALUE}] ) → boolean → booleanThe function xmlexists evaluates an XPath 1.0 expression (the first argument), with the passed XML value as its context item. The function returns false if the result of that evaluation yields an empty node-set, true if it yields any other value. The function returns null if any argument is null. A nonnull value passed as the context item must be an XML document, not a content fragment or any non-XML value.{"inputs":[{"file":"functions-xml.html","kind":"same-version-reviewed-manual","locale":"en","sha256":"01aeb9b85a44b934664d02e73f09eba80ac8da243706dd1ea2b4943d6cf43a31","version":"18.7"},{"file":"functions-xml.html","kind":"same-version-reviewed-manual","locale":"zh-Hans","sha256":"7f81f95d894b56436ba5c9f248999c6f79a15eff2f8e02803e9578894005ba44","version":"18.7"}],"release":"18.7","runtime_remeasured":false,"source_revision":"pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552"}Full definition and evidence JSON
center · PostgreSQL 18 · wiki-repair-20261023:bd7bb004a0066b034395bb69f08760fafa054fb9d2f8c5246d41bf916d72116f
Text language: en · wiki-repair-20261023:bd7bb004a0066b034395bb69f08760fafa054fb9d2f8c5246d41bf916d72116f