maxIntersectionsPosition

Introduced in: v1.1

Aggregate function that calculates the positions of the occurrences of the maxIntersections function.

Syntax

maxIntersectionsPosition(start_column, end_column)

Arguments

start_column — A numeric column that represents the start of each interval. If start_column is NULL or 0 then the interval will be skipped. (U)Int* or Float*
end_column — A numeric column that represents the end of each interval. If end_column is NULL or 0 then the interval will be skipped. (U)Int* or Float*

Returned value

Returns the start positions of the maximum number of intersected intervals. Any

Examples

Finding maximum intersections position

CREATE TABLE my_events (
    start UInt32,
    end UInt32
)
ENGINE = MergeTree
ORDER BY tuple();

INSERT INTO my_events VALUES
(1, 3),
(1, 6),
(2, 5),
(3, 7);

SELECT maxIntersectionsPosition(start, end) FROM my_events;

┌─maxIntersectionsPosition(start, end)─┐
│                                    2 │
└──────────────────────────────────────┘

maxIntersectionsPosition​

maxIntersectionsPosition