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Update KeyCondition.cpp

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alexey-milovidov 2021-04-13 18:47:11 +03:00 committed by GitHub
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src/Storages/MergeTree/KeyCondition.cpp
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@ -1326,11 +1326,12 @@ String KeyCondition::toString() const
* The set of all possible tuples can be considered as an n-dimensional space, where n is the size of the tuple.
* A range of tuples specifies some subset of this space.
*
* Hyperrectangles (you can also find the term "rail")
* will be the subrange of an n-dimensional space that is a direct product of one-dimensional ranges.
* In this case, the one-dimensional range can be: a period, a segment, an interval, a half-interval, unlimited on the left, unlimited on the right ...
* Hyperrectangles will be the subrange of an n-dimensional space that is a direct product of one-dimensional ranges.
* In this case, the one-dimensional range can be:
* a point, a segment, an open interval, a half-open interval;
* unlimited on the left, unlimited on the right ...
*
* The range of tuples can always be represented as a combination of hyperrectangles.
* The range of tuples can always be represented as a combination (union) of hyperrectangles.
* For example, the range [ x1 y1 .. x2 y2 ] given x1 != x2 is equal to the union of the following three hyperrectangles:
* [x1] x [y1 .. +inf)
* (x1 .. x2) x (-inf .. +inf)