PHP to reset all primary key sequences in your postgresql database

PHP to reset all primary key sequences in your postgresql database

Use the following php code t reset all of the primary key sequences with the max(id) currently in the db.

We use wrapper functions db_query (which returns an array from the db when a select statement is run)  and db_exec()  which runs an update or insert command against the db.

[code language=”php”]$sql = "SELECT t.relname as related_table,
a.attname as related_column,
s.relname as sequence_name
FROM pg_class s
JOIN pg_depend d ON d.objid = s.oid
JOIN pg_class t ON d.objid = s.oid AND d.refobjid = t.oid
JOIN pg_attribute a ON (d.refobjid, d.refobjsubid) = (a.attrelid, a.attnum)
JOIN pg_namespace n ON n.oid = s.relnamespace
WHERE s.relkind = ‘S’
AND n.nspname = ‘public’";
$qry = db_query($sql);

foreach($qry as $row)
{
$outsql = "select setval(‘$row[sequence_name]’,(select max($row[related_column]) from $row[related_table]))";
db_exec($outsql);
}[/code]