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Update 2.string.md #1340

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May 7, 2022
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Update 2.string.md #1340

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2 changes: 1 addition & 1 deletion docs-2.0/3.ngql-guide/6.functions-and-expressions/2.string.md
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Expand Up @@ -49,7 +49,7 @@ int hash() | Takes in any data type and encodes it into a hash value. |

- Using `NULL` as any of the argument of `substr()` will cause [an issue](https://github.com/vesoft-inc/nebula-graph/issues/878).

!!! note "OpenCypher compatibility"
!!! compatibility "OpenCypher compatibility"

- In openCypher, if `a` is `null`, `null` is returned.
- In openCypher, if `pos` is 0, the returned substring starts from the first character, and extend to `count` characters.
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