Slow metadata query blocking query execution

System information:

• Kubuntu 18.04
• DBeaver Version 7.2.1.202009201907

Connection specification:

• Oracle 11 - 12
• com.oracle.database.jdbc ojdbc8, 12.2.0.1

When i execute first statement after connect, it takes long time (93s), because there is is metatada query running. But it’s slow only first time. Problem is, that it’s not running on background and it blocks execution of already typed sql statement where a don’t need autocomplete data at this time. An autocomplete popups shows after query is completed.

Metadata query (completes after 93s)

SELECT  O.*,
t.TABLE_TYPE_OWNER,t.TABLE_TYPE,t.TABLESPACE_NAME,t.PARTITIONED,t.IOT_TYPE,t.IOT_NAME,t.TEMPORARY,t.SECONDARY,t.NESTED,t.NUM_ROWS
FROM DBA_OBJECTS O
LEFT OUTER JOIN DBA_ALL_TABLES t ON (t.OWNER = O.OWNER AND t.TABLE_NAME = o.OBJECT_NAME)
WHERE O.OWNER='USERNAME' AND O.OBJECT_TYPE IN ('TABLE', 'VIEW', 'MATERIALIZED VIEW')

[LonwoLonwo]

So, we added in Oracle Connection Settings in Oracle properties tab new checkbox “Use Union for table metadata reading”. The default value for this option is false. You can activate it to speed up reading the metadata. Your feedback will be very important to us.

[kseniiaguzeeva]

verified