Consolidated diff cursor#90
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kris7t merged 3 commits intoJun 11, 2026
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This PR adds a consolidated wrapper diff cursor that consolidates all changes by key: that is, the final diff is computed based on the wrapped diff cursor. It iterates (curses:) on the wrapped cursor on first move call and collects all changes by key to finally only include one diff entry per key. Iterating on a consolidated diff cursor only returns each affected key once and the from value is the value of the key in the original version of the map and the to value is the value of the key in the other version of the map.
This cursor is only useful when having a delta diff cursor which lists all change deltas: this way, a delta diff cursor may contain several transactions regarding the same key. Using the consolidated diff cursor, this internal behavior can be hidden.
The state-based map diff cursor overrides the consolidating function to skip the unnecessary consolidated wrapper.