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.IX Title "SQLT-DIAGRAM 1p"
.TH SQLT-DIAGRAM 1p "2022-11-19" "perl v5.36.0" "User Contributed Perl Documentation"
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.SH "NAME"
sqlt\-diagram \- Automatically create a diagram from a database schema
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  ./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\*(Aqt 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
.Ve
.SH "DESCRIPTION"
.IX Header "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 \s-1STDOUT,\s0 so you should
redirect the output into a file.
.PP
The default action is to assume the presence of foreign key
relationships defined via \*(L"\s-1REFERENCES\*(R"\s0 or \*(L"\s-1FOREIGN KEY\*(R"\s0 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 \*(L"name\*(R" to be considered a foreign key, so you could
include it in the \*(L"skip\*(R" option, and all fields called \*(L"name\*(R" 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 \*(L"natural-join-pk\*(R" option
to achieve this.
.SH "AUTHOR"
.IX Header "AUTHOR"
Ken Youens-Clark <kclark@cpan.org>.