+<?php
+
+/**@{
+ * Database related constants
+ */
+define( 'DBO_DEBUG', 1 );
+define( 'DBO_NOBUFFER', 2 );
+define( 'DBO_IGNORE', 4 );
+define( 'DBO_TRX', 8 ); // automatically start transaction on first query
+define( 'DBO_DEFAULT', 16 );
+define( 'DBO_PERSISTENT', 32 );
+define( 'DBO_SYSDBA', 64 ); // for oracle maintenance
+define( 'DBO_DDLMODE', 128 ); // when using schema files: mostly for Oracle
+define( 'DBO_SSL', 256 );
+define( 'DBO_COMPRESS', 512 );
+/**@}*/
+
+/**@{
+ * Valid database indexes
+ * Operation-based indexes
+ */
+define( 'DB_REPLICA', -1 ); # Read from a replica (or only server)
+define( 'DB_MASTER', -2 ); # Write to master (or only server)
+/**@}*/
+
+/**@{
+ * Flags for IDatabase::makeList()
+ * These are also available as Database class constants
+ */
+define( 'LIST_COMMA', 0 );
+define( 'LIST_AND', 1 );
+define( 'LIST_SET', 2 );
+define( 'LIST_NAMES', 3 );
+define( 'LIST_OR', 4 );
+/**@}*/