Oracle 上下文索引：不适用于 dblink

Question

db1 上有两个数据库，table test_table，上下文索引为字段 a。查询：

select *
  from test_table t
 where contains(t.a, 'str') > 0

它在 db1 上运行良好。但是当我尝试通过其他数据库的 dblink 执行相同的查询时：

select *
  from test_table@db1 t
 where contains(t.a, 'str') > 0

我收到这个错误：

ora-20000：Oracle 文本错误： DRG-10599: 列未编入索引

Answer 1

您必须添加 dblink 才能运行。 https://docs.oracle.com/cd/E11882_01/text.112/e24436/csql.htm#CCREF0104

The CONTAINS operator also supports database links. You can identify a remote table or materialized view by appending @dblink to the end of its name. The dblink must be a complete or partial name for a database link to the database containing the remote table or materialized view. (Querying of remote views is not supported.)

select *
  from test_table@db1 t
 where contains(t.a, 'str')@db1 > 0.

Oracle 上下文索引：不适用于 dblink

Oracle context index: doesn't work over dblink

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