lasdf1234 commented on PR #12241:
URL: https://github.com/apache/gravitino/pull/12241#issuecomment-5178511734
<p data-pm-slice="1 1 []"></p><h1>Manifest entry-range splitting
(follow-up)</h1><p>A <code>plan-task</code> is one batch of manifest entry
ranges to read.
The opaque string is <code>base64url(JSON array)</code>: the root is the
<strong>array itself</strong> — no <code>ranges</code> wrapper, and no embedded
scan/snapshot.</p><h2><code>planTaskKey</code> (decoded)</h2><pre><code
class="language-json">[
{
"manifest": "s3://wh/db/t/metadata/snap-42-m1.avro",
"entry-start": 40,
"entry-end": 60
},
{
"manifest": "s3://wh/db/t/metadata/snap-42-m2.avro",
"entry-start": 0,
"entry-end": 60
},
{
"manifest": "s3://wh/db/t/metadata/snap-42-m3.avro",
"entry-start": 0,
"entry-end": 20
}
]</code></pre>
Field | Meaning
-- | --
manifest | Data manifest path
entry-start / entry-end | Half-open range [start, end) within that manifest
Array length | 1 = single manifest; ≥ 2 = this batch spans multiple manifests
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