DBS_UPDATE(1p)						User Contributed Perl Documentation					    DBS_UPDATE(1p)

NAME

       dbs_update - Update SQL Databases

DESCRIPTION

       dbs_update is an utility to update SQL databases from text files.

       FORMAT OF THE TEXT FILES

       dbs_update assumes that each line of the input contains a data record and that the field within the records are separated by tabulators.
       You can tell dbs_update about the input format with the --format option.

       The first field of the data record is used as table specification.  These consists of the table name and optionally the index of starting
       column, separated by a dot.

       Alternatively dbs_update can read the column names from the first line of input (see the -h/--headline option). These can even be aliases
       for the real column names (see the -m/--map option).

COMMAND LINE PARAMETERS

       Required command line parameters are the DBI driver ("Pg" for Postgres or "mysql" for MySQL) and the database name. The third parameter is
       optionally and specifies the database user and/or the host where the database resides ("racke", "racke@linuxia.de" or "@linuxia.de").

OPTIONS

       --cleanse

       Removes all records which remain unaffected from the update process. The same result as deleting all records from the table first and then
       running dbs_update, but the table is not empty in the meantime.

       -c COLUMN,COLUMN,..., --columns=COLUMN,COLUMN,...

       Update only the table columns given by the COLUMN parameters.  To exclude columns from the update prepend "!" or "^" to the parameters.

       --rows=ROW,ROW,...

       Update only the input rows given by the ROW parameters.	The first row is 1 where headlines doesn't count.  To exclude rows from the update
       prepend "!" or "^" to the parameters.

       -f FILE, --file=FILE

       Reads records from file FILE instead of from standard input.

       --format=FORMAT[SEPCHAR]

       Assumes FORMAT as format for the input. Only CSV can be specified for now, default is TAB. The default field separator for CSV is a comma,
       you may change this by appending the separator to the format.

       -h, --headline

       Reads the column names from the first line of the input instead of dedicting them from the database layout. Requires the -t/--table option.

       -k COUNT, -k KEY,KEY,..., --keys=COUNT, --keys=KEY,KEY,...

       Specifies the keys for the table(s) either as the number of columns used as keys or by specifying them explicitly as comma separated argu-
       ments to the option.  This is used for the detection of existing records.

       -m ALIASDEF, --map=ALIASDEF

       Maps the names found in the first line of input to the actual column names in the database. The alias and the column name are separated
       with "=" signs and the different entries are separated by ";" signs, e.g. "Art-No.=code;Short Description=shortdescr'".

       --map-filter=FILTER

       Applies a filter to the column names read from the input file.  Currently there is only the "lc" filter available.

       --match-sql=FIELD:{STATEMENT}

       Updates only records where the value of the column FIELD is in the result set of the SQL statement STATEMENT, e.g. "category:{select dis-
       tinct name from categories}".

       -o, --update-only

       Updates existing database entries only, stops if it detects new ones.

       -r ROUTINE, --routine=ROUTINE

       Applies ROUTINE to any data record. ROUTINE must be a subroutine.  dbs_update passes the table name and a hash reference to this subrou-
       tine.  The keys of the hash are the column names and the values are the corresponding field values. If the return value of ROUTINE is not a
       truth value, the data record will be skipped.

       "sub {my ($table, $valref) = @_;
	   unless (defined $$valref{country} && $$valref{country} !~ /S/) {
	       $$valref{country} = "Germany";
	   }
	   1; }"

       --skipbadlines

       Lines not matching the assumed format are ignored. Without this option, dbs_update simply stops.

       -t TABLE, --table=TABLE

       Uses TABLE as table name for all records instead of the first field name.

AUTHOR

       Stefan Hornburg (Racke), racke@linuxia.de

SEE ALSO

       perl(1), DBIx::Easy(3)

perl v5.8.8							    2007-02-01							    DBS_UPDATE(1p)