Skip to contents

In-place geometry update for specific rows of a GeoPackage layer

Source: R/gpkg_metadata.R
gpkg_update_geom.Rd

Writes the changed features to a temporary layer in the same GeoPackage, swaps the geometry column into `layer` via a keyed (indexed) SQL UPDATE, then drops the temp layer. Layer triggers are dropped/restored around the write (see [gpkg_update_col()]).

Usage

gpkg_update_geom(gpkg, layer, id_col, sf_changed)

Arguments

gpkg

Path to the GeoPackage.

layer

Target layer name.

id_col

Id column used to match changed rows.

sf_changed

An `sf` of the changed features (must carry `id_col`).

Value

Invisibly `NULL`.

Details

Removing the temporary layer means removing everything GDAL created with it: the feature table, its four `rtree_*` index shadow tables and their triggers, and its rows in `gpkg_contents`, `gpkg_geometry_columns`, `gpkg_extensions`, and `gpkg_ogr_contents`. All of it happens inside the same transaction as the geometry swap, so a failure leaves the GeoPackage exactly as it was found.