openmaptiles

History

Frédéric Rodrigo 97216c5c19

Replace materialized view of water by tables with diff update (#853 )

Replacing materialized view by a tables with update from trigger on change only.

Start with the most simple cases.

Just replicate the change on:
* `osm_water_polygon` to `osm_water_lakeline`,
* `osm_water_polygon` to `osm_water_point`.

Use a view to factorize the `osm_water_lakeline` and `osm_water_point_view` definition and reuse it in the trigger.

The update of `osm_important_waterway_linestring` is more complex, as it is a merge of `osm_waterway_linestring`. It not done in the same way. At the end of the transaction we remove impacted and recompute them.

The goal is to update more quickly the content of derivated table by just updating the changing content. It replaces the update of materialized view because their need a full recompute (with lock issue).

Note, an advanced version of differential update over materialized view as already implemented in the building cluster PR #725.

It addresses #814 and a part of #809.

2020-05-20 13:14:22 -04:00

etl_diagram.png

Refreshed all diagrams, fixed automation & 2 broken graphs (#692 )

2019-10-26 21:28:43 -04:00

mapping_diagram.png

Refreshed all diagrams, fixed automation & 2 broken graphs (#692 )

2019-10-26 21:28:43 -04:00

mapping.yaml

Use one pass docs image generation (#751 )

2020-01-22 21:55:22 -05:00

README.md

Update diagrams