in Oracle

FBDA — 7 : Maintaining Partitioned Source Table

Taking up the TEST_FBDA_PARTITIONED table, let’s look at a couple of Partition Maintenance operations.

SQL> select partition_name, high_value, num_rows
2 from user_tab_partitions
3 where table_name = 'TEST_FBDA_PARTITIONED'
4 order by partition_position
5 /

PARTITION_NAME HIGH_VALUE NUM_ROWS
---------------- ------------------------- ----------
P_100 101 100
P_200 201 100
P_300 301 100
P_400 401 100
P_MAX MAXVALUE 301

SQL>

Let’s try a TRUNCATE PARTITION

SQL> alter table test_fbda_partitioned truncate partition p_100;

Table truncated.

SQL>

So, that’s supported.

Let’s try a SPLIT PARTTIION

SQL> alter table test_fbda_partitioned       
2 split partition p_max at (501)
3 into (partition p_500, partition p_max)
4 /
alter table test_fbda_partitioned
*
ERROR at line 1:
ORA-55610: Invalid DDL statement on history-tracked table


SQL>

So, a SPLIT PARTITION fails. We need to DISASSOCIATE the Flashback Archive.

SQL> execute dbms_flashback_archive.disassociate_fba('HEMANT','TEST_FBDA_PARTITIONED');

PL/SQL procedure successfully completed.

SQL> select table_name, flashback_archive_name, archive_table_name, status
2 from user_flashback_archive_tables
3 where table_name = 'TEST_FBDA_PARTITIONED'
4 /

TABLE_NAME
--------------------------------------------------------------------------------
FLASHBACK_ARCHIVE_NAME
--------------------------------------------------------------------------------
ARCHIVE_TABLE_NAME STATUS
----------------------------------------------------- -------------
TEST_FBDA_PARTITIONED
FBDA
SYS_FBA_HIST_93342 DISASSOCIATED


SQL>
SQL> alter table test_fbda_partitioned
2 split partition p_max at (501)
3 into (partition p_500, partition p_max)
4 /

Table altered.

SQL> execute dbms_flashback_archive.reassociate_fba('HEMANT','TEST_FBDA_PARTITIONED');

PL/SQL procedure successfully completed.

SQL>
SQL> select table_name, flashback_archive_name, archive_table_name, status
2 from user_flashback_archive_tables
3 where table_name = 'TEST_FBDA_PARTITIONED'
4 /

TABLE_NAME
--------------------------------------------------------------------------------
FLASHBACK_ARCHIVE_NAME
--------------------------------------------------------------------------------
ARCHIVE_TABLE_NAME STATUS
----------------------------------------------------- -------------
TEST_FBDA_PARTITIONED
FBDA
SYS_FBA_HIST_93342 ENABLED


SQL>

While a Table is disassociated with it’s Flashback Archive, DDL that would not normally be permitted may be done under strict control to ensure that there is no data divergence.

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