ORA-18161: FTST0002 – FTUnaryNot operator not supported

文档解释

ORA-18161: FTST0002 – FTUnaryNot operator not supported

Cause: An implementation that enforces one of the restrictions on FTUnaryNot must raise a static error if a full-text query does not obey the restriction.

Action: Do not use the FTUnaryNot full-text query operator.

ORA-18161: FTST0002 – FTUnaryNot operator not supported是当在TEXT或CONTAINS子句中使用UnaryNot运算符时，数据库会出现这个错误。

官方解释

常见案例

SELECT * FROM test_table t

WHERE CONTAINS(t.column_name, ‘!word’) > 0;

一般处理方法及步骤

1.可以尝试用括号将取反的查询条件包裹起来，比如：

SELECT * FROM test_table t

WHERE CONTAINS(t.column_name, ‘(word)’) > 0;

2.也可以考虑使用语言约束（language constraints），用来替换UnaryNot运算符，比如：

SELECT * FROM test_table t

WHERE CONTAINS(t.column_name, ‘word NOT’) > 0;