Expose `parseColumnType` function

Summary

Extracted and exported the parseColumnType method from the #257 branch. Related to #273. This is useful not only for RowBinary/Native protocols but also for TS interface codegens, so it is probably worth adding it right away.

For example:

Input type: Array(Array(DateTime('Etc/GMT-5')))

Output object:

{
sourceType: `Array(Array(DateTime('Etc/GMT-5')))`,
type: 'Array',
dimensions: 2,
value: {
type: 'DateTime',
timezone: 'Etc/GMT-5',
sourceType: `DateTime('Etc/GMT-5')`,
},
}

Currently supported types to parse:

Bool
UInt8
Int8
UInt16
Int16
UInt32
Int32
UInt64
Int64
UInt128
Int128
UInt256
Int256
Float32
Float64
String
FixedString(N)
UUID
Date
Date32
IPv4
IPv6
Array (arbitrary nesting)
Map (arbitrary nesting)
Tuple (arbitrary nesting)
Enum (including enums in arrays, maps, tuples)
DateTime (including timezones)
DateTime64 (including timezones and various precisions)
Decimal
Nullable, LowCardinality combinations

Currently, not supported (will throw):

Geo
(Simple)AggregateFunction
Nested
Old/new JSON
Dynamic
Variant

Please take a look at the tests for more examples. The tests are not fully complete, so this will be somewhat "experimental" still.

Checklist

[ ] Unit and integration tests covering the common scenarios were added
[ ] A human-readable description of the changes was provided to include in CHANGELOG
[ ] For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

ClickHouse / clickhouse-js

Expose `parseColumnType` function #316

Summary

Checklist

Quality Gate passed