#! /bin/sed -f
1idigraph schema {

# remove newlines
:a;N;$!ba;s/\n/ /g

s| *CREATE TABLE[^("'`]*[`"']\?\([a-z]\+\)[`"']\? *|\n    \1\n        [shape=none, margin=0, label=<\n            <table>\n                <tr><td colspan="3"><b>\1</b></td></tr>\n|ig

s/varchar *( *\([0-9]\+\) *)/varchar[\1]/ig

s/ *PRIMARY KEY *( *[`"']\?\([a-z]\+\)[`"']\? *) *[,)]//ig

:b;s/\([a-z]\+\)\([^;]*\)FOREIGN KEY *( *[`"']\?\([a-z]\+\)[`"']\? *) *REFERENCES *[`"']\?\([a-z]\+\)[`"'] *( *[`"']\?\([a-z]\+\)[`"']\? *) *\([^,)]*\)[,)]\(.*\)/\1\2\7\n \1:\3 -> \4:\5/ig;tb

s| *COMMENT *= *[`"']\?\([^`"']*\)[`"']\?|                <tr><td colspan="3">\1</td></tr>|ig

s| *[`"']\([a-z]\+\)[`"'] *\([^,)]*\) *COMMENT *[`"']\([^`"']*\)[`"'] *[,)]|                <tr><td port="\1">\1</td><td>\2</td><td>\3</td></tr>\n|ig

s/ *ENGINE *= *\w* *//ig
s/ *DEFAULT *CHARSET *= *\w* *//ig
s/ *CHARACTER *SET *=\? *\w* *//ig
s|;|\n            </table>\n        >];\n|ig
s/(//ig

$a}