Add lightweight tableExists endpoint to tables service#631
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Adds GET /v0|v1/databases/{databaseId}/tables/{tableId}/exists which
returns HTTP 200 if the table exists and HTTP 404 otherwise.
Existence is determined via a HouseTable reference lookup
(findTableRefById) that does not parse metadata.json or read from HDFS,
making it cheaper than GET Table. Authorization is enforced via
@secured(GET_TABLE_METADATA).
Adds service/handler/controller plumbing plus e2e and mock controller
tests, including a test that verifies existence is reported even when
metadata.json is corrupted (since GET Table would fail in that case).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Add a new lightweight
tableExistsendpoint which bypass HDFS and only query HTS. This is useful to Metacat and ODD which only need to know if table exists without knowing its metadata.Changes
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Testing Done
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Additional Information
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