dbAddKey                Add key.
dbAsDate                Converts to timestamp.
dbColumn                Add or remove a column.
dbComment               Comment table/view/schema.
dbDrop                  Drop table/view/schema.
dbIndex                 Create an index.
dbSchema                Check and create schema.
dbTableInfo             Get information about table columns.
dbVacuum                Vacuum.
dbWriteDataFrame        Write/read in data frame mode to/from database
                        table.
pgGetBoundary           Retrieve bounding envelope of geometries or
                        rasters.
pgGetGeom               Load a PostGIS geometry from a PostgreSQL
                        table/view/query into R.
pgGetRast               Load raster from PostGIS database into R.
pgInsert                Inserts data into a PostgreSQL table.
pgListGeom              List geometries/rasters
pgMakePts               Add a POINT or LINESTRING geometry field.
pgPostGIS               Check and create PostGIS extension.
pgSRID                  Find (or create) PostGIS SRID based on CRS
                        object.
pgWriteGeom             Inserts data into a PostgreSQL table.
pgWriteRast             Write raster to PostGIS database table.
