Implement native function of map_from_entries #2153
Description
Describe
map_from_entries(arrayOfEntries) is not supported in Auron’s native execution path, so queries using it fall back instead of being executed natively.
Describe the solution you'd like
Add native support for Spark map_from_entries(arrayOfEntries) through the extension-function path.
The implementation should keep Spark semantics aligned:
- create a map from the given array of entries
- preserve Spark-compatible behavior for entry arrays of key/value structs
- handle nulls and invalid inputs consistently with Spark
- add regression tests to verify semantic consistency with Spark