hasura / hasura/graphql-engine
Introduce Postgis TopoJson support for Geography?
Open
a/data/postgres
c/server
k/enhancement
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Description
The support for Geography types (via Postgis) seems to default to a `ST_AsGeoJSON` conversion. PostGis 2.1+ also supports `AsTopoJSON` (https://postgis.net/docs/manual-dev/AsTopoJSON.html). Would it be possible to introduce some sort of parameter to request this conversion?
Pseudo:
```
table {
some_polygon_column : some_polygon_column.AsTopoJSON()
}
```
Code mentions of ST_AsGeoJSON:
https://github.com/hasura/graphql-engine/blob/9ef603360cfe47d28c8edfcd1802901412d3d534/server/src-lib/Hasura/Backends/Postgres/DDL/Table.hs#L102
https://github.com/hasura/graphql-engine/blob/9ef603360cfe47d28c8edfcd1802901412d3d534/server/src-lib/Hasura/RQL/DML/Internal.hs#L291
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