ora-00600 kdsgrp1

select * from main_users没有报错，但执行下面语句报错：

貌似遇到bug

Bug 27397048 - Intermittent ORA-600[kdsgrp1] Raised By Query Using Index (Doc ID 27397048.8) Description ORA-600[kdsgrp1] is intermittently raised by a query using index. Error does not occur when the query is retried. Rediscovery Notes You may have encountered this bug when all of the following are true. - ORA-600[kdsgrp1] is seen - Query uses index access path - Not a RAC environment Workaround None

检查发现，该表的fldname字段上存在约束和索引。

尝试删除约束，重建唯一索引解决。

ALTER TABLE MAIN_USERS
  DROP CONSTRAINT TB_MAIN_USERS_FLDNAME CASCADE;
DROP INDEX TB_MAIN_USERS_FLDNAME;

CREATE UNIQUE INDEX IDX_TB_MAIN_USERS_FLDNAME ON MAIN_USERS(FLDNAME);