[branch-4.0](jsonb) add json_object_flatten scalar function (#62825)#63114
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[branch-4.0](jsonb) add json_object_flatten scalar function (#62825)#63114csun5285 wants to merge 3 commits into
csun5285 wants to merge 3 commits into
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Introduce `json_object_flatten(JSONB) -> JSONB`. Turn a nested JSONB
object into a single-level JSONB whose keys are the dot-joined paths to
each leaf, mirroring NiFi `FlattenJson` *keep-arrays* semantics:
```
{"a":{"b":2}} -> {"a.b":2}
{"a":{"b":{"c":3}}} -> {"a.b.c":3}
{"a":[{"b":1}]} -> {"a":[{"b":1}]}
```
apache/doris-website#3589
(cherry picked from commit 18fceee)
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csun5285
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BE UT Coverage ReportIncrement line coverage Increment coverage report
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…anch-4.0 variant->jsonb cast
On branch-4.0, the variant->jsonb cast returns NULL for an empty object
and for objects whose leaves are all null ({}, {"a":{}}, {"a":null},
{"a":{"b":null}}), whereas master preserves them as {}. Update rows
k=4..7 of the sql_variant expected output from {} to \N so the suite
matches the actual branch-4.0 behavior. The function itself is correct
and the jsonb-column section is unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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pick from master #62825