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added referencing foreign keys to table structure #5

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added referencing foreign keys to table structure #5

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6b12eb0
added referencing foreign keys to table structure
juzna May 18, 2011
9b46153
sort referencing foreign keys
juzna May 18, 2011
dbdd6d1
better and cleaner backwards keys in PostgreSQL
juzna Aug 1, 2011
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27 changes: 27 additions & 0 deletions adminer/drivers/pgsql.inc.php
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Original file line number Diff line number Diff line change
Expand Up @@ -287,6 +287,33 @@ function foreign_keys($table) {
return $return;
}

function foreign_keys_to($table) {
$return = array();

foreach (get_rows("SELECT pg_constraint.oid, pg_class.relname, conname AS name, (SELECT nspname FROM pg_namespace WHERE oid = connamespace) AS ns, pg_get_constraintdef(pg_constraint.oid) AS definition
FROM pg_constraint
JOIN pg_class ON pg_class.oid = pg_constraint.conrelid
WHERE confrelid = (SELECT oid FROM pg_class WHERE relname = " . q($table) . ")
AND contype = 'f'::char
ORDER BY confkey, pg_class.relname, conname"
) as $row) {
if(preg_match('~FOREIGN KEY\s*\((.+)\)\s*REFERENCES (.+)\((.+)\)(.*)$~iA', $row['definition'], $match)) {
$row['source'] = array_map('trim', explode(',', $match[1]));
$row['table'] = $row['relname'];
$row['target'] = array_map('trim', explode(',', $match[3]));

$row['on_delete'] = (preg_match('~ON DELETE (CASCADE|SET NULL|RESTRICT|NO ACTION)~', $match[4], $match2)) ? $match2[1] : 'NO ACTION';
$row['on_update'] = (preg_match('~ON UPDATE (CASCADE|SET NULL|RESTRICT|NO ACTION)~', $match[4], $match2)) ? $match2[1] : 'NO ACTION';

$return[] = $row;
} else {
// error in parsing
}
}

return $return;
}

function view($name) {
global $connection;
return array("select" => $connection->result("SELECT pg_get_viewdef(" . q($name) . ")"));
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23 changes: 23 additions & 0 deletions adminer/table.inc.php
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,29 @@
if ($jush != "sqlite") {
echo '<p><a href="' . h(ME) . 'foreign=' . urlencode($TABLE) . '">' . lang('Add foreign key') . "</a>\n";
}

if (function_exists('foreign_keys_to') && ($foreign_keys = foreign_keys_to($TABLE))) {
echo "<h3>" . lang('Referencing foreign keys') . "</h3>\n";
echo "<table cellspacing='0'>\n";
echo "<thead><tr><th>" . lang('Target') . "<td>" . lang('Source') . "<td>" . lang('ON DELETE') . "<td>" . lang('ON UPDATE') . ($jush != "sqlite" ? "<td>&nbsp;" : "") . "</thead>\n";
foreach ($foreign_keys as $foreign_key) {
$name = $foreign_key['name'];
$link = ($foreign_key["db"] != "" ? "<b>" . h($foreign_key["db"]) . "</b>." : "") . h($foreign_key["table"]);
echo "<tr title='" . h($name) . "'>";
echo "<th><i>" . implode("</i>, <i>", array_map('h', $foreign_key["target"])) . "</i>";
echo "<td><a href='" . h($foreign_key["db"] != "" ? preg_replace('~db=[^&]*~', "db=" . urlencode($foreign_key["db"]), ME) : ($foreign_key["ns"] != "" ? preg_replace('~ns=[^&]*~', "ns=" . urlencode($foreign_key["ns"]), ME) : ME)) . "table=" . urlencode($foreign_key["table"]) . "'>"
. ($foreign_key["db"] != "" ? "<b>" . h($foreign_key["db"]) . "</b>." : "") . ($foreign_key["ns"] != "" ? "<b>" . h($foreign_key["ns"]) . "</b>." : "") . h($foreign_key["table"])
. "</a>"
;
echo "(<i>" . implode("</i>, <i>", array_map('h', $foreign_key["source"])) . "</i>)";
echo "<td>$foreign_key[on_delete]\n";
echo "<td>$foreign_key[on_update]\n";
if ($jush != "sqlite") {
echo '<td><a href="' . h(ME . 'foreign=' . urlencode($foreign_key['table']) . '&name=' . urlencode($name)) . '">' . lang('Alter') . '</a>';
}
}
echo "</table>\n";
}
}

if (support("trigger")) {
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