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Type: Improvement
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Resolution: Unresolved
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Priority: Major - P3
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None
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Affects Version/s: None
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Component/s: Aggregation Framework
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Query Optimization
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Query 2019-08-12
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(copied to CRM)
We added $toHashedIndexKey in SERVER-49214 which solves some similar use cases, and some described below in the original description and comments. This ticket remains open to add a more general hash expression - perhaps for more cryptographic use cases, or if someone wants/needs a particular algorithm.
Original Description
Oracle has http://docs.oracle.com/database/121/SQLRF/functions183.htm#SQLRF55647 which computes one of several standard hash functions on a particular column.
It would be nice if there was analogous expression in agg:
hashMD5:{$hash:{source:"$expression", function:"MD5"}}
or something like that.
- is related to
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SERVER-49214 Add $toHashedIndexKey expression
- Closed
- related to
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SERVER-69128 Server-side document hashing
- Closed