模拟MOS售后处理逻辑坏块
select* from REPAIR_TABLE;BEGIN
DBMS_REPAIR.ADMIN_TABLES (
table_name => 'REPAIR_TABLE',
table_type => DBMS_REPAIR.REPAIR_TABLE,
action => DBMS_REPAIR.CREATE_ACTION,
tablespace => 'USERS');
END;
select* from REPAIR_TABLE;
select* from ORPHAN_KEY_TABLE;
BEGIN
DBMS_REPAIR.ADMIN_TABLES (
table_name => 'ORPHAN_KEY_TABLE',
table_type => DBMS_REPAIR.ORPHAN_TABLE,
action => DBMS_REPAIR.CREATE_ACTION,
tablespace => 'USERS');
END;
select* from ORPHAN_KEY_TABLE;
DECLARE
num_corrupt INT;
BEGIN
num_corrupt := 0;
DBMS_REPAIR.CHECK_OBJECT (
schema_name => 'HR',
object_name => 'TLOG',
repair_table_name => 'REPAIR_TABLE',
corrupt_count => num_corrupt);
dbms_output.put_line( 'Find'|| num_corrupt||' Bolcks.');
END;
select* from REPAIR_TABLE;
DECLARE
num_fix INT;
BEGIN
num_fix := 0;
DBMS_REPAIR.FIX_CORRUPT_BLOCKS (
schema_name => 'HR',
object_name => 'TLOG',
object_type => DBMS_REPAIR.TABLE_OBJECT,
repair_table_name => 'REPAIR_TABLE',
fix_count => num_fix);
dbms_output.put_line( 'Fix'|| num_fix||' Bolcks.');
END;
begin
dbms_repair.skip_corrupt_blocks(schema_name => 'HR',
object_name => 'TLOG');
end;
select* from ORPHAN_KEY_TABLE;
DECLARE
num_orphans INT;
BEGIN
num_orphans := 0;
DBMS_REPAIR.DUMP_ORPHAN_KEYS (
schema_name => 'HR',
object_name => 'ILOG_A',
object_type => DBMS_REPAIR.INDEX_OBJECT,
repair_table_name => 'REPAIR_TABLE',
orphan_table_name => 'ORPHAN_KEY_TABLE',
key_count => num_orphans);
DBMS_OUTPUT.PUT_LINE('orphan key count: ' || TO_CHAR(num_orphans));
END;
DECLARE
num_orphans INT;
BEGIN
num_orphans := 0;
DBMS_REPAIR.DUMP_ORPHAN_KEYS (
schema_name => 'HR',
object_name => 'ILOG_B',
object_type => DBMS_REPAIR.INDEX_OBJECT,
repair_table_name => 'REPAIR_TABLE',
orphan_table_name => 'ORPHAN_KEY_TABLE',
key_count => num_orphans);
DBMS_OUTPUT.PUT_LINE('orphan key count: ' || TO_CHAR(num_orphans));
END;
selectkeyrowid from ORPHAN_KEY_TABLEwhere index_name='ILOG_A';
select* from orphan_key_table where index_name='ILOG_B' and keyrowid||' '='AAAVZYAIgAAAMABAAA'||' ';
select index_name, dump(key) from ORPHAN_KEY_TABLE;
select chr(65) from dual;为了机器排序而存储实数的算法：
例子：
195,2,25,12,30
100**(195-193-0)(2-1)+
100**(195-193-1)(25-1)+
100**(195-193-2)(12-1)+
100**(195-193-3)(30-1)
10000+2400+11+0.29=12411.29
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