Oracle Database Interval Partition Set Up Script

Oracle Database Interval Partition Set Up Script

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This script is used to set up the test table for the following blog posts:

DROP TABLE interval_test PURGE
/
CREATE TABLE interval_test
(
  data_from_date   DATE NOT NULL
, data_to_date     DATE
, business_key     NUMBER
, partition_column AS (TRUNC(data_to_date, 'MM') - 1) -- change this
)
PARTITION BY RANGE (partition_column) INTERVAL(NUMTOYMINTERVAL(1, 'MONTH'))
(
  PARTITION p_interval_test_0 VALUES LESS THAN (TO_DATE('2000-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
)
ENABLE ROW MOVEMENT
/

INSERT INTO interval_test (data_from_date, data_to_date, business_key)
SELECT   DATE '2000-01-01' + (ROWNUM)     data_from_date
,        DATE '2000-01-01' + (ROWNUM + 1) data_to_date
,        ROWNUM                           table_key
FROM     dual
CONNECT BY LEVEL <= 365
/

COMMIT
/
 

BEGIN
	Sys.DBMS_Stats.Gather_Table_Stats(
		    Ownname          => null
		,   Tabname          => 'interval_test'
		,   Estimate_Percent => 100
		,   Degree           => Sys.DBMS_Stats.Auto_Degree
		,   Granularity      => 'AUTO'
		,   Cascade          => Sys.DBMS_Stats.Auto_Cascade
		,   Force            => true
		);
END;
/
 

EXPLAIN PLAN FOR SELECT * FROM interval_test WHERE DATE '2001-01-01' BETWEEN data_from_date AND data_to_date
/
SELECT plan_table_output FROM TABLE(dbms_xplan.display(format=>'ALL -PROJECTION'))
/

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