| General Information |
| Note |
-- attempting to compile this package using dbmslibc.sql produces the following errors:
98/20
PLS-00201: identifier 'DBMS_LIBCACHE$DEF.DB_LINK' must be declared
160/3
PL/SQL: Declaration ignored
161/19
PLS-00201: identifier 'DBMS_LIBCACHE$DEF.DB_LINK' must be declared
-- you must run catlibc.sql before attempting to install this package.
The database link parameter is mandatory and points to the instance that will be used for extracting the SQL statements.
The user must have the role SELECT_ON_CATALOG at the source instance. For improved security,
the connection may use a password file or LDAP authentication.
The database link is mandatory only for releases with dbms_libcache$def.ACCESS_METHOD = DB_LINK_METHOD. |
| Purpose |
This package provides a mechanism for applications to view and compile cursors in the local library cache using cursors selected
from the library cache on a remote instance. This package is intended for use with RAC and is not part of the default installation. |
| Source |
{ORACLE_HOME}/rdbms/admin/dbmslibc.sql |
| First Available |
2000 |
| Dependencies |
| DBA_USERS |
DBMS_SQL |
GV$SQL |
UTL_RAW |
| DBMS_LIBCACHE$DEF |
DBMS_SYS_SQL |
GV$SQLTEXT_WITH_NEWLINES |
V$SQL2 |
| DBMS_OUTPUT |
GV$PARAMETER |
GV$SQL_BIND_METADATA |
|
|
| Security Model |
The session executing the code must have the SELECT_CATALOG_ROLE role as well as the ability to ALTER the target schema
and a valid database link to the same user in the source schema. |
| Subprograms |
|
| |
| COMPILE_FROM_REMOTE |
| Call when the library cache on the source instance is stable, and whenever the target library cache is restarted |
dbms_libcache.compile_from_remote(
p_db_link IN dbms_libcache$def.db_link%type,
p_username IN VARCHAR2 DEFAULT NULL,
p_threshold_executions IN NATURAL DEFAULT 3,
p_threshold_sharable_mem IN NATURAL DEFAULT 1000,
p_parallel_degree IN NATURAL DEFAULT 1); |
-- prepares the database's library cache
exec dbms_libcache.compile_from_remote('CACHELINK');
-- prepares the library cache for a named schema's entries
exec dbms_libcache.compile_from_remote('CACHELINK', 'UWCLASS');
-- prepares the library cache for a named schema's statements with greater than 10 executions
exec dbms_libcache.compile_from_remote('CACHELINK', 'UWCLASS', 10);
-- as above but additionally specifying a minimum cursor size of 4K
exec dbms_libcache.compile_from_remote('CACHELINK', 'UWCLASS', 10, 4096); |
| |
| COMPILE_FROM_REMOTE_JOB |
| called as a standalone job allows for parallel execution of the compilation task |
dbms_libcache.compile_from_remote_job(
p_db_link IN dbms_libcache$def.db_link%TYPE,
p_SQL_tab IN OUT dbms_libcache$def.sql_tab,
p_lower_bound IN BINARY_INTEGER,
p_upper_bound IN BINARY_INTEGER); |
| TBD |
