NAME

sqlt-diagram - Automatically create a diagram from a database schema

SYNOPSIS

./sqlt-diagram -d|-f|--from|--db=db_parser [options] schema.sql

Options:

  -o|--output        Output file name (default STDOUT)
  -i|--image         Output image type ("png" or "jpeg," default "png")
  -t|--title         Title to give schema
  -c|--cols          Number of columns
  -n|--no-lines      Don't draw lines
  --font-size        Font size ("small," "medium," "large," or "huge,"
                     default "medium")
  --gutter           Gutter size between tables
  --color            Add colors
  --show-fk-only     Only show fields that act as primary 
                     or foreign keys

  --natural-join     Perform natural joins
  --natural-join-pk  Perform natural joins from primary keys only
  -s|--skip          Fields to skip in natural joins
  --debug            Print debugging information

DESCRIPTION

This script will create a picture of your schema. Only the database driver argument (for SQL::Translator) is required. If no output file name is given, then image will be printed to STDOUT, so you should redirect the output into a file.

The default action is to assume the presence of foreign key relationships defined via "REFERENCES" or "FOREIGN KEY" constraints on the tables. If you are parsing the schema of a file that does not have these, you will find the natural join options helpful. With natural joins, like-named fields will be considered foreign keys. This can prove too permissive, however, as you probably don't want a field called "name" to be considered a foreign key, so you could include it in the "skip" option, and all fields called "name" will be excluded from natural joins. A more efficient method, however, might be to simply deduce the foriegn keys from primary keys to other fields named the same in other tables. Use the "natural-join-pk" option to achieve this.

AUTHOR

Ken Youens-Clark <kclark@cpan.org>.