Optimising data type rendering

[sunng87]

As we have finished rendering data as table and chart, the next step is to visualize data type/table schema information.

Date types

As of https://github.com/GreptimeTeam/greptimedb/tree/v0.1.0-alpha-20221205-weekly, we have following data types supported:

• Null (can be ignored when rendering schema)
• Boolean
• Numbers:
  • Int8
  • Int16
  • Int32
  • Int64
  • UInt8
  • UInt16
  • UInt32
  • UInt64
  • Float32
  • Float64
• Strings:
  • Binary bytes (not supported for now)
  • String
• Time and date:
  • Date
  • DateTime
  • Timestamp
• Compound types
  • List (not well supported at the moment, ignored for now)

https://github.com/GreptimeTeam/greptimedb/blob/v0.1.0-alpha-20221205-weekly/src/datatypes/src/data_type.rs#L34

So the main types we going to render are:

• Boolean
• Number
• Strings
• Date time types

Rendering

How we are rendering these types:

• Use icon and tooltip for table schema tree
• Use icon and tooltip for result table row header
• Use custom styles for result table content:
  • use special style for string, hex bytes
  • use special style for date time types, add readable tooltip for timestamps

[ZonaHex]

https://docs.greptime.com/reference/data-types We have 4 types of timestamp[(0/3/6/9)]. Probably need to address this. Fixed by #312 for #311

[ZonaHex]

https://github.com/GreptimeTeam/greptimedb/issues/2072 Follow up on this. Probably need to change time types.