1 | #include "arrayEnumerateExtended.h" |
---|---|
2 | #include <Functions/FunctionFactory.h> |
3 | |
4 | |
5 | namespace DB |
6 | { |
7 | |
8 | /** arrayEnumerateUniq(arr) |
9 | * - outputs an array parallel (having same size) to this, where for each element specified |
10 | * how many times this element was encountered before (including this element) among elements with the same value. |
11 | * For example: arrayEnumerateUniq([10, 20, 10, 30]) = [1, 1, 2, 1] |
12 | * arrayEnumerateUniq(arr1, arr2...) |
13 | * - for tuples from elements in the corresponding positions in several arrays. |
14 | */ |
15 | class FunctionArrayEnumerateUniq : public FunctionArrayEnumerateExtended<FunctionArrayEnumerateUniq> |
16 | { |
17 | using Base = FunctionArrayEnumerateExtended<FunctionArrayEnumerateUniq>; |
18 | public: |
19 | static constexpr auto name = "arrayEnumerateUniq"; |
20 | using Base::create; |
21 | }; |
22 | |
23 | void registerFunctionArrayEnumerateUniq(FunctionFactory & factory) |
24 | { |
25 | factory.registerFunction<FunctionArrayEnumerateUniq>(); |
26 | } |
27 | |
28 | } |
29 |