Ive reported for version 1.14 a bug for support postgresql schema in createMultipleInsertCommand bug I noticed that still appear in 1.15.
I fix it whit this line
in CDbCommandBuilder class:
line 291 $tableName=$table->rawName; //replacing $tableName=$this->getDbConnection()->quoteTableName($table->name);
could you include in core for next version please?