DE-876 | Add cursor statistics `documentLookups` and `seeks`

[Simran-B]

Description

Is it correct that documentLookups are reported for late materialization or are there additional cases?

It seems to be limited to the IndexNode, i.e. the statistic is not populated for merge joins which use "document lookup with late materialization" according to the query explain output.

Also correct required properties in HTTP API and some misc mistakes

Upstream PRs

• 3.10:
• 3.11:
• 3.12:
• 3.13:

[arangodb-docs-automation[bot]]

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[Simran-B]

https://github.com/arangodb/arangodb/pull/21394 addresses the problem of documentLookups not being counted for merge joins.

[Simran-B]

Got feedback from Lars