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docs: Clarify that proto2 and proto3 are supported

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#2369
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Leopold Schabel 2019-02-28 10:45:30 +00:00 committed by GitHub
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docs/en/interfaces/formats.md
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@ -597,6 +597,8 @@ See also [Format Schema](#formatschema).
Protobuf - is a [Protocol Buffers](https://developers.google.com/protocol-buffers/) format.
ClickHouse supports both `proto2` and `proto3`. Repeated/optional/required fields are supported.
This format requires an external format schema. The schema is cached between queries.
Usage examples:
@ -642,7 +644,7 @@ message MessageType {
ClickHouse tries to find a column named `x.y.z` (or `x_y_z` or `X.y_Z` and so on).
Nested messages are suitable to input or output a [nested data structures](../data_types/nested_data_structures/nested/).
Default values defined in the protobuf schema like this
Default values defined in a `proto2` protobuf schema like this
```
message MessageType {