Rampant TechPress Oracle Data Warehouse Management PHẦN 5 ppsx

ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 45 Input arguments:  ownname - The name of the schema  tabname - The name of the table to which this column belongs  partname - The name of the table partition from which to get the statistics. If the table is partitioned and partname  is null, the statistics will be retrieved from the global table level.  stattab - The user statistics table identifier describing from where to retrieve the statistics. If stattab is null, the statistics will be retrieved directly from the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  statown - The schema containing stattab (if different then ownname) Output arguments:  numrows - Number of rows in the table (partition)  numblks - Number of blocks the table (partition) occupies  avgrlen - Average row length for the table (partition) Exceptions:  ORA-20000: Object does not exist or insufficient privileges or no statistics have been stored for requested object DELETE_COLUMN_STATS The purpose of the delete_column_stats procedure is to delete column-related statistics for a specified table. Input arguments:  ownname - The name of the schema  tabname - The name of the table to which this column belongs  colname - The name of the column C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 46  partname - The name of the table partition for which to delete the statistics. If the table is partitioned and partname is null, global column statistics will be deleted.  stattab - The user statistics table ideentifier describing from where to delete the statistics. If stattab is null, the statistics will be deleted directly from the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  cascade_parts - If the table is partitioned and partname is null, setting this to true will cause the deletion of statistics for this column for all underlying partitions as well.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges DELETE_INDEX_STATS The purpose of the delete_index_stats procedure is to deletes index-related statistics for the specified index. Input arguments:  ownname - The name of the schema  indname - The name of the index  partname - The name of the index partition for which to delete the statistics. If the index is partitioned and partname is null, index statistics will be deleted at the global level.  stattab - The user statistics table identifier describing from where to delete the statistics. If stattab is null, the statistics will be deleted directly from the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  cascade_parts - If the index is partitioned and partname is null, setting this to true will cause the deletion of statistics for this index for all underlying partitions as well.  statown - The schema containing stattab (if different then ownname) C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 47 Exceptions:  ORA-20000: Object does not exist or insufficient privileges DELETE_TABLE_STATS The purpose of the procedure delete_table_stats is to delete table-related statistics from the specified table. Input arguments:  ownname - The name of the schema  tabname - The name of the table to which this column belongs  colname - The name of the column  partname - The name of the table partition from which to get the statistics. If the table is partitioned and partname is null, the statistics will be retrieved from the global table level.  stattab - The user statistics table identifier describing from where to retrieve the statistics. If stattab is null, the statistics will be retrieved directly from the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  cascade_parts - If the table is partitioned and partname is null, setting this to true will cause the deletion of statistics for this table for all underlying partitions as well.  cascade_columns - Indicates that delete_column_stats should be called for all underlying columns (passing the cascade_parts parameter).  cascade_indexes - Indicates that delete_index_stats should be called for all underlying indexes (passing the cascade_parts parameter).  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 48 DELETE_SCHEMA_STATS The purpose of the delete_schema_stats procedure is to delete statistics for a specified schema. Input arguments:  ownname - The name of the schema  stattab - The user statistics table identifier describing from where to delete the statistics. If stattab is null, the statistics will be deleted directly in the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges DELETE_DATABASE_STATS The purpose of the delete_database_stats procedure is to delete statistics for an entire database. Input arguments:  stattab - The user statistics table identifier describing from where to delete the statistics. If stattab is null, the statistics will be deleted directly in the dictionary.  statid - The (optional) identifier to associate with these statistics within stattab (Only pertinent if stattab is not NULL).  statown - The schema containing stattab. If stattab is not null and statown is null, it is assumed that every schema in the database contains a user statistics table with the name stattab. Exceptions:  ORA-20000: Object does not exist or insufficient privileges C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 49 The set of procedures that enable the transference of statistics from the dictionary to a user statistics table (export_*) and from a user statistics table to the dictionary (import_*) are: CREATE_STAT_TABLE The purpose of the create_stat_table procedure is to create a table with name 'stattab' in 'ownname' schema which is capable of holding statistics. The columns and types that compose this table are not relevant as it should be accessed solely through the procedures in this package. Input arguments:  ownname - The name of the schema  stattab - The name of the table to create. This value should be passed as the 'stattab' argument to other procedures when the user does not wish to modify the dictionary statistics directly.  tblspace - The tablespace in which to create the statistics tables. If none is specified, they will be created in the user's default tablespace. Exceptions:  ORA-20000: Table already exists or insufficient privileges  ORA-20001: Tablespace does not exist DROP_STAT_TABLE The purpose of the drop_stat_table procedure is to drop a user statistics table for a specified user (schema.) Input arguments:  ownname - The name of the schema  stattab - The user statistics table identifier Exceptions:  ORA-20000: Table does not exists or insufficient privileges C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 50 EXPORT_COLUMN_STATS The purpose of the export_column_stats procedure is to retrieve statistics for a particular column and store them in the user statistics table identified by the value of stattab. Input arguments:  ownname - The name of the schema  tabname - The name of the table to which this column belongs  colname - The name of the column  partname - The name of the table partition. If the table is partitioned and partname is null, global and partition column statistics will be exported.  stattab - The user statistics table identifier describing where to store the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges EXPORT_INDEX_STATS The purpose of the export_index_stats procedure is to retrieve statistics for a particular index and store them in the user statistics table identified by the value of stattab. Input arguments:  ownname - The name of the schema  indname - The name of the index  partname - The name of the index partition. If the index is partitioned and partname is null, global and partition index statistics will be exported.  stattab - The user statistics table identifier describing where to store the statistics. C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 51  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges EXPORT_TABLE_STATS The purpose of the export_table_stats is to retrieve statistics for a particular table and store them in the user statistics table (stattab.) Cascade will result in all index and column stats associated with the specified table being exported as well. Input arguments:  ownname - The name of the schema  tabname - The name of the table  partname - The name of the table partition. If the table is partitioned and partname is null, global and partition table statistics will be exported.  stattab - The user statistics table identifier describing where to store the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  cascade - If true, column and index statistics for this table will also be exported.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges EXPORT_SCHEMA_STATS The purpose of the export_shema_stats procedure is to retrieve statistics for all objects in the schema identified by ownname and store them in the user statistics table identified by stattab. C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 52 Input arguments:  ownname - The name of the schema  stattab - The user statistics table identifier describing where to store the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges EXPORT_DATABASE_STATS Retrieves statistics for all objects in the database and stores them in the user statistics tables identified by statown.stattab Input arguments:  stattab - The user statistics table identifier describing where to store the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab. If statown is null, it is assumed that every schema in the database contains a user statistics table with the name stattab. Exceptions:  ORA-20000: Object does not exist or insufficient privileges IMPORT_COLUMN_STATS Retrieves statistics for a particular column from the user statistics table identified by stattab and stores them in the dictionary Input arguments:  ownname - The name of the schema C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 53  tabname - The name of the table to which this column belongs  colname - The name of the column  partname - The name of the table partition. If the table is partitioned and partname is null, global and partition column statistics will be imported.  stattab - The user statistics table identifier describing from where to retrieve the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges  ORA-20001: Invalid or inconsistent values in the user statistics table IMPORT_INDEX_STATS The purpose of the import_index_stats procedure is to retrieve statistics for a particular index from the user statistics table identified by stattab and store them in the dictionary of the target database. Input arguments:  ownname - The name of the schema  indname - The name of the index  partname - The name of the index partition. If the index is partitioned and partname is null, global and partition index statistics will be imported.  stattab - The user statistics table identifier describing from where to retrieve the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 54  ORA-20001: Invalid or inconsistent values in the user statistics table IMPORT_TABLE_STATS The purpose of the import_table_stats procedure is to retrieve statistics for a particular table from the user statistics table identified by stattab and store them in the dictionary. Cascade will result in all index and column statistics associated with the specified table being imported as well. Input arguments:  ownname - The name of the schema  tabname - The name of the table  partname - The name of the table partition. If the table is partitioned and partname is null, global and partition table statistics will be imported.  stattab - The user statistics table identifier describing from where to retrieve the statistics.  statid - The (optional) identifier to associate with these statistics within stattab.  cascade - If true, column and index statistics for this table will also be imported.  statown - The schema containing stattab (if different then ownname) Exceptions:  ORA-20000: Object does not exist or insufficient privileges  ORA-20001: Invalid or inconsistent values in the user statistics table IMPORT_SCHEMA_STATS The purpose of the import_schema_stats procedure is to retrieve statistics for all objects in the schema identified by ownname from the user statistics table and store them in the dictionary Input arguments:  ownname - The name of the schema  stattab - The user stat table identifier describing from where to retrieve the statistics. C OPYRIGHT © 2003 R AMPANT T ECH P RESS . A LL R IGHTS R ESERVED . [...]... the ANALYZE command The procedures are: GATHER_INDEX_STATS The purpose of this procedure is to gather index statistics It is equivalent to running: PAGE 55 COPYRIGHT © 2003 RAMPANT TECHPRESS ALL RIGHTS RESERVED ROBO BOOKS MONOGRAPH DATA WAREHOUSING AND ORACLE8 I ANALYZE INDEX [ownname.]indname [PARTITION partname] COMPUTE STATISTICS | ESTIMATE STATISTICS SAMPLE estimate_percent PERCENT It does not execute... privilege on the table being analyzed Input arguments: ownname - schema of table to analyze tabname - name of table partname - name of partition PAGE 56 COPYRIGHT © 2003 RAMPANT TECHPRESS ALL RIGHTS RESERVED ROBO BOOKS MONOGRAPH DATA WAREHOUSING AND ORACLE8 I estimate_percent - Percentage of rows to estimate (NULL means compute.) The valid range is [0.000001,100) This value may be increased automatically... BOOKS MONOGRAPH DATA WAREHOUSING AND ORACLE8 I statid - The (optional) identifier to associate with these statistics within stattab statown - The schema containing stattab (if different then ownname) Exceptions: ORA-20000: Object does not exist or insufficient privileges ORA-20001: Invalid or inconsistent values in the user statistics table IMPORT_DATABASE_STATS The purpose of the import_database_stats... associate with these statistics within stattab statown - The schema containing stattab (if different then ownname) Exceptions: ORA-20000: Table does not exist or insufficient privileges PAGE 57 COPYRIGHT © 2003 RAMPANT TECHPRESS ALL RIGHTS RESERVED ... all objects in the database from the user statistics table(s) and store them in the dictionary Input arguments: stattab - The user stat table identifier describing from where to retrieve the statistics statid - The (optional) identifier to associate with these statistics within stattab statown - The schema containing stattab If statown is null, it is assumed that every schema in the database contains... value may be increased automatically to achieve better results block_sample - whether or not to use random block sampling instead of random row sampling Random block sampling is more efficient, but if the data is not randomly distributed on disk then the sample values may be somewhat correlated Only pertinent when doing an estimate statistics method_opt - method options of the following format (the phrase . not exist or insufficient privileges DELETE_DATABASE_STATS The purpose of the delete_database_stats procedure is to delete statistics for an entire database. Input arguments:  stattab. in the user statistics table IMPORT_DATABASE_STATS The purpose of the import_database_stats procedure is to retrieve statistics for all objects in the database from the user statistics table(s). R IGHTS R ESERVED . ROBO B OOKS M ONOGRAPH D ATA W AREHOUSING AND O RACLE 8 I P AGE 55  statid - The (optional) identifier to associate with these statistics within stattab. 