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    Updating index on oracle table Dirty sex chat site

    In order to make it usable, of course, you have to REBUILD that index. REBUILD" is faster than CREATE, since REBUILD uses Fast Full Scan (FFS) and CREATE uses Full Table Scan (FTS). My intention was to show the process of speeding up index creation by first creating an index with UNUSABLE and later to REBUILD that index. writes: The UNUSABLE option in the CREATE INDEX statement is not supported on 8i.

    Overall, the script is good for building large indexes.

    You made the statement that "This works on Oracle 8i and 9i." The UNUSABLE option was introduced in Oracle 9i.

    Things work differently (eg: no read only transactions), some things don't work (eg: triggers), some things appear to work but don't really (eg: set autotrace). COM select count(*) from scott.emp; COUNT(*) ---------- 14 Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=CHOOSE (Cost=1 Card=1) 1 0 SORT (AGGREGATE) 2 1 INDEX (FAST FULL SCAN) OF 'EMP_PK' (UNIQUE) (Cost=1 Card=14) Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 0 consistent gets 0 physical reads 0 redo size 0 bytes sent via SQL*Net to client 0 bytes received via SQL*Net from client 0 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed [email protected] select sysdate from my_dual; SYSDATE --------- 08-OCT-01 Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=CHOOSE (Cost=1 Card=1) 1 0 INDEX (FAST FULL SCAN) OF 'SYS_IOT_TOP_19186' (UNIQUE) (Cost=1 Card=1) Statistics ---------------------------------------------------------- 0 recursive calls 4 db block gets 2 consistent gets 0 physical reads 0 redo size 371 bytes sent via SQL*Net to client 430 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 1 sorts (memory) 0 sorts (disk) 1 rows processed [email protected] Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=CHOOSE (Cost=1 Card=1) 1 0 INDEX (FULL SCAN) OF 'SYS_IOT_TOP_31083' (UNIQUE) (Cost=1 Card=1) Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 1 consistent gets 0 physical reads 0 redo size 387 bytes sent via SQL*Net to client 503 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed SQL select sysdate from dual; SYSDATE --------- 08-OCT-01 1 row selected.

    However, the size of the bitmap index depends on the cardinality of the column on which it is created as well as the data distribution.

    Consequently, a bitmap index on the GENDER column will be smaller than a B-tree index on the same column.

    Therefore, when the query_table_expression_clause of an INSERT, DELETE, or UPDATE statement is a table_collection_expression, the collection expression must be a subquery that uses the TABLE function to select the table's nested table column.

    CREATE TABLE test ( person_id NUMBER(10), per_phones phone_t); desc test set describe depth all desc test set describe depth 1 col data_type format a40 SELECT column_name, data_type FROM user_tab_cols WHERE table_name = 'TEST'; TABLESPACE uwdata; desc person SELECT table_name FROM user_tables; select table_name, table_type, table_type_owner, nested FROM user_all_tables; col parent_table_column format a25 SELECT table_name, table_type_name, parent_table_column FROM user_nested_tables; INSERT INTO person (person_id, first_name, last_name, person_phones, active_flag) VALUES (0, 'Test', 'Tester', phone_tab_t(), 'I'); INSERT INTO person (person_id, first_name, last_name, person_phones, active_flag) VALUES (1, 'Dan', 'Morgan', phone_tab_t(phone_t('C', '206-555-1212')), 'A'); INSERT INTO person (person_id, first_name, last_name, person_phones) VALUES (2, 'Helen', 'Lofstrom', phone_tab_t(phone_t('C', '425-555-1212'))); col person_phones format a50 SELECT * FROM person; To change the information in a nested table by using the UPDATE statement with a VARRAY, you cannot update individual elements in the varray.

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