raminqaf commented on code in PR #29520:
URL: https://github.com/apache/flink/pull/29520#discussion_r4335430861
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docs/data/sql_functions.yml:
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@@ -1434,6 +1434,28 @@ variant:
error instead of returning NULL, use the `PARSE_XML` function.
See `PARSE_XML` for the full documentation.
+ - sql: XML_STRING(variant)
+ table: VARIANT.xmlString()
+ description: |
+ Converts a Variant into an XML string. This is the inverse of
`PARSE_XML`.
+
+ Fields with an `@` prefix are written as attributes, the `$` field as
text, and the other
+ fields as child elements, in the order that the `#` field records. A
Variant NULL is written
+ with `xsi:nil="true"`. A value other than a string or a UUID gets an
`xsi:type` attribute,
+ e.g. `xsi:type="xs:int"`, so that it reads back as the same type. If the
XML string uses the
+ `xsi` or `xs` prefix, the root element declares it.
Review Comment:
Should we make section bullet point like?
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