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Faster foreign keys

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This commit is contained in:
Jan Dolecek
2011-08-01 09:47:45 +01:00
committed by Jakub Vrana
parent 2d721016d9
commit a80c1d1632
1 changed files with 12 additions and 12 deletions
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24
adminer/drivers/pgsql.inc.php
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@@ -270,19 +270,19 @@ ORDER BY a.attnum"
function foreign_keys($table) {
$return = array();
foreach (get_rows("SELECT tc.constraint_name, kcu.column_name, rc.update_rule AS on_update, rc.delete_rule AS on_delete, unique_constraint_schema AS ns, ccu.table_name AS table, ccu.column_name AS ref
FROM information_schema.table_constraints tc
LEFT JOIN information_schema.key_column_usage kcu USING (constraint_catalog, constraint_schema, constraint_name)
LEFT JOIN information_schema.referential_constraints rc USING (constraint_catalog, constraint_schema, constraint_name)
LEFT JOIN information_schema.constraint_column_usage ccu ON rc.unique_constraint_catalog = ccu.constraint_catalog AND rc.unique_constraint_schema = ccu.constraint_schema AND rc.unique_constraint_name = ccu.constraint_name
WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.constraint_schema = current_schema() AND tc.table_name = " . q($table) //! there can be more unique_constraint_name
) as $row) {
$foreign_key = &$return[$row["constraint_name"]];
if (!$foreign_key) {
$foreign_key = $row;
foreach (get_rows("SELECT conname, (SELECT nspname FROM pg_namespace WHERE oid = connamespace) AS ns, pg_get_constraintdef(oid) AS definition
FROM pg_constraint
WHERE conrelid = (SELECT oid FROM pg_class WHERE relname = " . q($table) . ")
AND contype = 'f'::char
ORDER BY conkey, 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'] = $match[2];
$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['conname']] = $row;
}
$foreign_key["source"][] = $row["column_name"];
$foreign_key["target"][] = $row["ref"];
}
return $return;
}