NAME

       v.db.renamecol  - Renames a column in the attribute table connected to a given vector map.

KEYWORDS

       vector, database, attribute table

SYNOPSIS

       v.db.renamecol
       v.db.renamecol help
       v.db.renamecol map=name  [layer=string]  column=old_name,new_name  [--verbose]  [--quiet]

   Parameters:
       map=name
           Vector map for which to rename attribute column

       layer=string
           Layer where to rename column
           Default: 1

       column=old_name,new_name
           Old and new name of the column (old,new)

DESCRIPTION

       v.db.renamecol  renames a column in the attribute table connected to a given vector map. It automatically
       checks the connection for the specified layer.

NOTES

       If the map table is connected through the DBF or SQLite drivers,  the  renaming  is  internally  done  by
       adding  a  new  column  with  new name, transferring the contents of the old column to the new column and
       dropping the old column. This is needed as DBF or SQLite do not support "ALTER TABLE" command  to  rename
       columns.  Due  to  this  the  renamed column is found as last column of the table, it's original position
       cannot be maintained.

       The SQLite driver will exit with an error if the column rename involves only  a  change  of  case,  i.e.,
       upper-to-lowercase,  or  lower-to-uppercase.  The  SQLite  protocol  considers  "NAME"  and  "name" to be
       identical column names. In  cases  like  these,  the  user  should  rename  the  original  column  to  an
       intermediary name, then rename the intermediary to the final name.

EXAMPLES

       Renaming a column:

       v.info -c myroads
       v.db.renamecol myroads column=label,roadtype
       v.info -c myroads

SEE ALSO

       db.execute,   v.db.addcol,   v.db.addtable,   v.db.connect,  v.db.dropcol,  v.db.droptable,  v.db.select,
       v.db.update

AUTHOR

       Markus Neteler

       Last changed: $Date: 2011-11-08 01:42:51 -0800 (Tue, 08 Nov 2011) $

       Full index

       © 2003-2013 GRASS Development Team

GRASS 6.4.3                                                                               v.db.renamecol(1grass)