NAME

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
    --skip-tables      Comma-separated list of table names to exclude
    --skip-tables-like Comma-separated list of regexen to exclude tables
    --debug            Print debugging information

DESCRIPTION

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 foreign keys from primary keys to other fields named the same in other tables. Use the "natural-join-pk" option to achieve this.

AUTHOR