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Add supported data types to documents

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JackyWoo 2024-08-05 18:59:09 +08:00
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docs/en/engines/table-engines/mergetree-family/mergetree.md
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@ -1007,6 +1007,19 @@ They can be used for prewhere optimization only if we enable `set allow_statisti
[Count-min](https://en.wikipedia.org/wiki/Count%E2%80%93min_sketch) sketches which provide an approximate count of the frequency of each value in a column.
#### Supported Data Types {#supported-data-types}
| Data Type / Statistics | count_min | minmax | tdigest | uniq |
|-------------------------|-----------|--------|---------|------|
| Integer types | ✔ | ✔ | ✔ | ✔ |
| Floating-point numbers | ✔ | ✔ | ✔ | ✔ |
| Boolean | ✔ | ✔ | ✔ | ✔ |
| Strings | ✔ | ✗ | ✗ | ✔ |
| Dates | ✔ | ✔ | ✔ | ✔ |
You can also add `LowCardinality` and `Nullable` modifiers to the data types.
## Column-level Settings {#column-level-settings}
Certain MergeTree settings can be override at column level: