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Add nullable to map.merge #1439

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Merged
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Oct 16, 2025
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Add nullable to map.merge #1439

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74f3eb1
Add nullable to map.merge
Josipmrden Oct 15, 2025
989180d
Merge branch 'main' into nullable-map-merge
matea16 Oct 16, 2025
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8 changes: 5 additions & 3 deletions pages/advanced-algorithms/available-algorithms/map.mdx
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Expand Up @@ -171,16 +171,18 @@ RETURN map.from_pairs([["b", 3], ["c", "c"]]) AS map;
### `merge()`

The procedure merges two maps into one. If the same key occurs twice, the later
value will overwrite the previous one.
value will overwrite the previous one.

If null is provided as an argument, it will resolve to an empty map.

<Callout type="info">
This function is equivalent to **apoc.map.merge**.
</Callout>

{<h4 className="custom-header"> Input: </h4>}

- `first: Map` ➡ A map containing key-value pairs that need to be merged with another map.
- `second: Map` ➡ The second map containing key-value pairs that need to be merged with the key-values from the first map.
- `first: mgp.Nullable[Map]` ➡ A map containing key-value pairs that need to be merged with another map.
- `second: mgp.Nullable[Map]` ➡ The second map containing key-value pairs that need to be merged with the key-values from the first map.

{<h4 className="custom-header"> Output: </h4>}

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