mirror_php/moodle
1
0
Fork 0
mirror of https://github.com/moodle/moodle.git synced 2025-04-17 22:45:54 +02:00
Code Issues Projects Releases Wiki Activity

Drop all the unique keys inside PostgreSQL DB and convert them to

Browse Source 
their equivalest unique indexes. We aren't going to allow unique
keys from 1.7 and upwards (until we decide to enforce referential
intregrity and until ADOdb support it)
This commit is contained in:
stronk7 2006-09-24 22:14:23 +00:00
parent 32da8f410f
commit 26b82be252
2 changed files with 32 additions and 1 deletions

31
lib/db/postgres7.php

@ -1923,6 +1923,37 @@ function main_upgrade($oldversion=0) {
execute_sql("CREATE UNIQUE INDEX {$CFG->prefix}role_sor_uix ON {$CFG->prefix}role (sortorder);", false);
}
if ($oldversion < 2006092510) {
/// Convert all the PG unique keys into their corresponding unique indexes
/// we don't want such keys inside Moodle 1.7 and above
/// Look for all the UNIQUE CONSTRAINSTS existing in DB
$uniquecons = get_records_sql ("SELECT conname, relname, conkey, clas.oid AS tableoid
FROM pg_constraint cons,
pg_class clas
WHERE cons.contype='u'
AND cons.conrelid = clas.oid");
/// Iterate over every unique constraint, calculating its fields
if ($uniquecons) {
foreach ($uniquecons as $uniquecon) {
$conscols = trim(trim($uniquecon->conkey, '}'), '{');
$conscols = explode(',', $conscols);
/// Iterate over each column to fetch its name
$indexcols = array();
foreach ($conscols as $conscol) {
$column = get_record_sql ("SELECT attname, attname
FROM pg_attribute
WHERE attrelid = $uniquecon->tableoid
AND attnum = $conscol");
$indexcols[] = $column->attname;
}
/// Drop the old UNIQUE CONSTRAINT
execute_sql ("ALTER TABLE $uniquecon->relname DROP CONSTRAINT $uniquecon->conname", false);
/// Create the new UNIQUE INDEX
execute_sql ("CREATE UNIQUE INDEX {$uniquecon->relname}_".implode('_', $indexcols)."_uix ON $uniquecon->relname (".implode(', ', $indexcols).')', false);
}
}
}
return $result;
}

2
version.php

@ -6,7 +6,7 @@
// This is compared against the values stored in the database to determine
// whether upgrades should be performed (see lib/db/*.php)
$version = 2006092409; // YYYYMMDD = date
$version = 2006092410; // YYYYMMDD = date
// XY = increments within a single day
$release = '1.7 dev'; // Human-friendly version name