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MDL-33018 support varchar_pattern_ops on unique indexes

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Petr Škoda
2012-07-06 08:19:55 +02:00
committed by Petr Škoda
parent 661dd35d89
commit 068cf0e519
2 changed files with 17 additions and 2 deletions
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lib/ddl/postgres_sql_generator.php
+2 -2
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@@ -133,11 +133,11 @@ class postgres_sql_generator extends sql_generator {
$hints = $xmldb_index->getHints();
$fields = $xmldb_index->getFields();
if (in_array('varchar_pattern_ops', $hints) and count($fields) == 1) {
// Add the pattern index and keep the normal one.
// Add the pattern index and keep the normal one, keep unique only the standard index to improve perf.
foreach ($sqls as $sql) {
$field = reset($fields);
$count = 0;
$newindex = preg_replace("/^CREATE INDEX ([a-z0-9_]+) ON ([a-z0-9_]+) \($field\)$/", "CREATE INDEX \\1_pattern ON \\2 USING btree ($field varchar_pattern_ops)", $sql, -1, $count);
$newindex = preg_replace("/^CREATE( UNIQUE)? INDEX ([a-z0-9_]+) ON ([a-z0-9_]+) \($field\)$/", "CREATE INDEX \\2_pattern ON \\3 USING btree ($field varchar_pattern_ops)", $sql, -1, $count);
if ($count != 1) {
debugging('Unexpected getCreateIndexSQL() structure.');
continue;