远程 Oracle 数据库成功连接到 BIRT 但表不显示

Question

I have connected a remote oracle database by its IP address in BIRT through A VPN network . It shows the connection successful but tables are not showing just Stored Procedure are showing there.

Is there any solution? Please help me.

Answer 1

Reasons could be:

• Did you check the "Prefetch all schemas from database" and "Enable SQL code assist" checkboxes in the same JDBC Dataset preferences? I think hat tables are only shown when these are checked.

• What you think is a TABLE is a SYNONYM instead. Synonyms are only shown when the "Show Aliases" checkbox in the DataSet edit dialog is checked.

• Or it's a VIEW. Check the "Type" listbox in the DataSet edit dialog.

Anyway, while developing reports for a schema with about 1000 objects (tables, views, synonyms, packages etc) everyday, I have switched the options "Prefetch all schemas from database" and "Enable SQL code assist" off, and I don't miss it at all.

Instead, as a best practice:

I always develop and test my SQL queries with Oracle SQL*Developer (using bind variables of the form:PI_XXX) and then just copy/paste the query into BIRT's DataSet edit dialog.

Each bind variable exists exactly once in the query. This is strictly necessary, because internally, BIRT/JDBC replaces each:PI_XXX bind variable with a "?".

Each bind variable corresponds to a BIRT DataSet parameter. The order of the DS parameters must correspond to the order of the bind variables in the query.

In order to be able to use a bind variable several times in a query, I use the WITH PARAMS AS (SELECT... FROM DUAL) trick:

For example:

with params as
(   select :PI_PATTERN as pattern
         , to_date(:PI_FROM_DATE, 'DD.MM.YYYY')      as from_date_incl
         , to_date(:PI_UNTIL_DATE, 'DD.MM.YYYY') + 1 as until_date_excl
    from dual
)
select t.MY_ID
     , t.ENTRY_DATE
     , t.DESCRIPTION
from   my_table t
     , params
where  (params.pattern is null or t.description like params.pattern)
and    (params.from_date_incl is null or params.from_date_incl <= t.entry_date)
and    (params.until_date_excl is null or t.entry_date < params.until_date_excl)
order by t.MY_ID