@@ -305,8 +305,9 @@ struct Settings : public SettingsCollection<Settings>
M(SettingOverflowMode, join_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingBool, join_any_take_last_row, false, "When disabled (default) ANY JOIN will take the first found row for a key. When enabled, it will take the last row seen if there are multiple rows for the same key.") \
M(SettingBool, partial_merge_join, false, "Use partial merge join instead of hash join for LEFT and INNER JOINs.") \
M(SettingBool, partial_merge_join_optimizations, false, "Enable optimisations in partial merge join") \
M(SettingUInt64, partial_merge_join_rows_in_right_blocks, 10000, "Split right-hand joining data in blocks of specified size.") \
M(SettingBool, partial_merge_join_optimizations, false, "Enable optimizations in partial merge join") \
M(SettingUInt64, partial_merge_join_rows_in_right_blocks, 10000, "Split right-hand joining data in blocks of specified size. It's a portion of data indexed by min-max values and possibly unloaded on disk.") \
M(SettingFloat, partial_merge_join_rows_in_left_blocks, 10000, "Group left-hand joining data in bigger blocks. Setting it to a bigger value increase JOIN performance and memory usage.") \
\
M(SettingUInt64, max_rows_to_transfer, 0, "Maximum size (in rows) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.") \
M(SettingUInt64, max_bytes_to_transfer, 0, "Maximum size (in uncompressed bytes) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.") \
Takes an array, returns an array with the difference between all pairs of neighboring elements. For example:
Takes an array, returns an array of differences between adjacent elements. The first element will be 0, the second is the difference between the second and first elements of the original array, etc. The type of elements in the resulting array is determined by the type inference rules for subtraction (e.g. UInt8 - UInt8 = Int16). UInt*/Int*/Float* types are supported (type Decimal is not supported).
Returns an array of the same size as the source array, indicating where each element first appears in the source array. For example: arrayEnumerateDense([10,20,10,30]) = [1,2,1,3].
Returns an array of the same size as the source array, indicating where each element first appears in the source array.
## arrayIntersect(arr)
Example:
Takes an array, returns the intersection of all array elements. For example:
Takes multiple arrays, returns an array with elements that are present in all source arrays. Elements order in the resulting array is the same as in the first array.
Applies an aggregate function to array and returns its result.If aggregate function has multiple arguments, then this function can be applied to multiple arrays of the same size.
Applies an aggregate function to array elements and returns its result. The name of the aggregation function is passed as a string in single quotes `'max'`, `'sum'`. When using parametric aggregate functions, the parameter is indicated after the function name in parentheses `'uniqUpTo(6)'`.
arrayReduce('agg_func', arr1, ...) - apply the aggregate function `agg_func` to arrays `arr1...`. If multiple arrays passed, then elements on corresponding positions are passed as multiple arguments to the aggregate function. For example: SELECT arrayReduce('max', [1,2,3]) = 3
Example:
```sql
SELECTarrayReduce('max',[1,2,3])
```
## arrayReverse(arr)
```text
┌─arrayReduce('max', [1, 2, 3])─┐
│ 3 │
└───────────────────────────────┘
```
If an aggregate function takes multiple arguments, then this function must be applied to multiple arrays of the same size.
