ORA-02070: database does not support in this context

Question

I have a query like

INSERT INTO sid_rem@dev_db
(sid)
select sid from v$session

Now, when i execute this query i get ORA-02070: database does not support in this context

This error happens only when I insert data from v$session into some remote db. Its working fine for any other table.

Anyone know why this issue and any workaround for this?

Answer 1

Works using gv$session instead of v$session:

INSERT INTO sid_rem@dev_db(sid)
select sid from gv$session;

gv$ views are global views, that is, they are not restricted to one node(instance), but see the entire database(RAC). v$ views are subviews of gv$.

Searching on the internet I found this has something to do with distributed transactions.

Thread on ora-code.com

Answer 2

I don't know why this is happening, it's probably in the documentation somewhere but my Oracle-Docs-Fu seems to have deserted me today.

One possible work-around is to use a global temporary table

SQL> create table tmp_ben ( sid number );

Table created.

SQL> connect schema/pw@db2
Connected.
SQL> create table tmp_ben ( sid number );

Table created.

SQL> insert into tmp_ben@db1 select sid from v$session;
insert into tmp_ben@db1 select sid from v$session
                                               *
ERROR at line 1:
ORA-02070: database  does not support  in this context

SQL> create global temporary table tmp_ben_test ( sid number );

Table created.

SQL> insert into tmp_ben_test select sid from v$session;

73 rows created.

SQL> insert into tmp_ben@db1 select * from tmp_ben_test;

73 rows created.

Answer 3

Late answer but might still be useful. I've found this error occurs when trying to select from system views across a database link where the system view contains columns of type LONG. If the query can be reworded to avoid the LONG columns these joins will work fine.

Example:

SELECT dc_prod.*
  FROM dba_constraints@prod_link dc_prod
  INNER JOIN dba_constraints dc_dev
    ON (dc_dev.CONSTRAINT_NAME = dc_prod.CONSTRAINT_NAME)

will fail with an ORA-02070 due to accessing the LONG column SEARCH_CONDITION, but

SELECT dc_prod.*
  FROM (SELECT OWNER,
               CONSTRAINT_NAME,
               CONSTRAINT_TYPE,
               TABLE_NAME,
               -- SEARCH_CONDITION,
               R_OWNER,
               R_CONSTRAINT_NAME,
               DELETE_RULE,
               STATUS,
               DEFERRABLE,
               DEFERRED,
               VALIDATED,
               GENERATED,
               BAD,
               RELY,
               LAST_CHANGE,
               INDEX_OWNER,
               INDEX_NAME,
               INVALID,
               VIEW_RELATED
          FROM dba_constraints@prod_link) dc_prod
  INNER JOIN (SELECT OWNER,
                     CONSTRAINT_NAME,
                     CONSTRAINT_TYPE,
                     TABLE_NAME,
                     -- SEARCH_CONDITION,
                     R_OWNER,
                     R_CONSTRAINT_NAME,
                     DELETE_RULE,
                     STATUS,
                     DEFERRABLE,
                     DEFERRED,
                     VALIDATED,
                     GENERATED,
                     BAD,
                     RELY,
                     LAST_CHANGE,
                     INDEX_OWNER,
                     INDEX_NAME,
                     INVALID,
                     VIEW_RELATED
          FROM dba_constraints) dc_dev
    ON (dc_dev.CONSTRAINT_NAME = dc_prod.CONSTRAINT_NAME)

works fine because the LONG column SEARCH_CONDITION from DBA_CONSTRAINTS is not accessed.

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