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Oracle Replication Tips by Burleson |
Oracle materialized view mlog$ table
The mlogs$_<table_name>
is the materialized view log created with the CREATE MATERIALIZED
VIEW LOG
command. Note that materialized view log tables using primary keys also
have rupd$_
tables, as is the case in this example. The rupd$_
table supports updateable materialized views (covered in Chapter
4), which are only possible on log tables with primary keys.
The materialized view logs are just like any other table and can be
queried.
SQL> desc mlog$_bonus;
Name Null? Type
---------------------------- -------- -------------
M_ROW$$ VARCHAR2(255)
SNAPTIME$$ DATE
DMLTYPE$$ VARCHAR2(1)
OLD_NEW$$ VARCHAR2(1)
CHANGE_VECTOR$$ RAW(255)
Execute a select count(*) to determine whether there are changes
waiting to propagate.
SQL> select count(*) from mlog$_bonus;
COUNT(*)
----------
0
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