Grid width (columns) a database's cell_model was tiled with

The tile key depends on how many columns the grid has, and that differs by version (v8 global: 7200; v7 regional: 3103). Readers must use the SAME width the writer used or tile IN (…) prunes away the very rows being sought — and silently, since a wrong tile id is still a valid tile id.

Usage

cell_grid_ncol(con = NULL)

Arguments

con

a DBI connection, or NULL for the default

Value

integer number of grid columns

Details

Resolution order: the cell_grid table written alongside cell_model, then the grid the connection itself implies (grid_for_con()), then the compiled default. v8/v9 resolve to 7200 either way; v1-v7 resolve to 3103 instead of silently taking the global width.