Merge pull request #66172 from Blargian/docs_mapPartialXYZ

[Docs] add missing `mapPartialSort`, `mapPartialReverseSort`
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Robert Schulze 2024-07-08 08:37:49 +00:00 committed by GitHub
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2 changed files with 68 additions and 2 deletions

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@ -600,7 +600,7 @@ mapApply(func, map)
**Arguments**
- `func` - [Lambda function](../../sql-reference/functions/index.md#higher-order-functions---operator-and-lambdaparams-expr-function).
- `func` [Lambda function](../../sql-reference/functions/index.md#higher-order-functions---operator-and-lambdaparams-expr-function).
- `map` — [Map](../data-types/map.md).
**Returned value**
@ -831,7 +831,39 @@ SELECT mapSort((k, v) -> v, map('key2', 2, 'key3', 1, 'key1', 3)) AS map;
└──────────────────────────────┘
```
For more details see the [reference](../../sql-reference/functions/array-functions.md#array_functions-sort) for `arraySort` function.
For more details see the [reference](../../sql-reference/functions/array-functions.md#array_functions-sort) for `arraySort` function.
## mapPartialSort
Sorts the elements of a map in ascending order with additional `limit` argument allowing partial sorting.
If the `func` function is specified, the sorting order is determined by the result of the `func` function applied to the keys and values of the map.
**Syntax**
```sql
mapPartialSort([func,] limit, map)
```
**Arguments**
- `func` Optional function to apply to the keys and values of the map. [Lambda function](../../sql-reference/functions/index.md#higher-order-functions---operator-and-lambdaparams-expr-function).
- `limit` Elements in range [1..limit] are sorted. [(U)Int](../data-types/int-uint.md).
- `map` Map to sort. [Map](../data-types/map.md).
**Returned value**
- Partially sorted map. [Map](../data-types/map.md).
**Example**
``` sql
SELECT mapPartialSort((k, v) -> v, 2, map('k1', 3, 'k2', 1, 'k3', 2));
```
``` text
┌─mapPartialSort(lambda(tuple(k, v), v), 2, map('k1', 3, 'k2', 1, 'k3', 2))─┐
│ {'k2':1,'k3':2,'k1':3} │
└───────────────────────────────────────────────────────────────────────────┘
```
## mapReverseSort(\[func,\], map)
@ -861,3 +893,35 @@ SELECT mapReverseSort((k, v) -> v, map('key2', 2, 'key3', 1, 'key1', 3)) AS map;
```
For more details see function [arrayReverseSort](../../sql-reference/functions/array-functions.md#array_functions-reverse-sort).
## mapPartialReverseSort
Sorts the elements of a map in descending order with additional `limit` argument allowing partial sorting.
If the `func` function is specified, the sorting order is determined by the result of the `func` function applied to the keys and values of the map.
**Syntax**
```sql
mapPartialReverseSort([func,] limit, map)
```
**Arguments**
- `func` Optional function to apply to the keys and values of the map. [Lambda function](../../sql-reference/functions/index.md#higher-order-functions---operator-and-lambdaparams-expr-function).
- `limit` Elements in range [1..limit] are sorted. [(U)Int](../data-types/int-uint.md).
- `map` Map to sort. [Map](../data-types/map.md).
**Returned value**
- Partially sorted map. [Map](../data-types/map.md).
**Example**
``` sql
SELECT mapPartialReverseSort((k, v) -> v, 2, map('k1', 3, 'k2', 1, 'k3', 2));
```
``` text
┌─mapPartialReverseSort(lambda(tuple(k, v), v), 2, map('k1', 3, 'k2', 1, 'k3', 2))─┐
│ {'k1':3,'k3':2,'k2':1} │
└──────────────────────────────────────────────────────────────────────────────────┘
```

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@ -1982,6 +1982,8 @@ mapExtractKeyLike
mapFilter
mapFromArrays
mapKeys
mapPartialReverseSort
mapPartialSort
mapPopulateSeries
mapReverseSort
mapSort