Thursday, January 28, 2010

Oracle PHP Cookbook: Working with Dates and Times in Oracle and PHP

Oracle PHP Cookbook: Working with Dates and Times in Oracle and PHP:

To convert a UNIX timestamp into an Oracle DATE type:

CREATE OR REPLACE
FUNCTION unixts_to_date(unixts IN PLS_INTEGER) RETURN DATE IS
/**
* Converts a UNIX timestamp into an Oracle DATE
*/
unix_epoch DATE := TO_DATE('19700101000000','YYYYMMDDHH24MISS');
max_ts PLS_INTEGER := 2145916799; -- 2938-12-31 23:59:59
min_ts PLS_INTEGER := -2114380800; -- 1903-01-01 00:00:00
oracle_date DATE;

BEGIN

IF unixts > max_ts THEN
RAISE_APPLICATION_ERROR(
-20901,
'UNIX timestamp too large for 32 bit limit'
);
ELSIF unixts < min_ts THEN
RAISE_APPLICATION_ERROR(
-20901,
'UNIX timestamp too small for 32 bit limit' );
ELSE
oracle_date := unix_epoch + NUMTODSINTERVAL(unixts, 'SECOND');
END IF;

RETURN (oracle_date);

END;