Oracle C++ Call Interface Programmer's Guide

Data Conversions
Data Conversions for Date, Timestamp, and Interval Datatypes (Cont.)
External Types
Internal Types
VARCHAR,C
HAR DATE TS TSTZ TSLTZ
OCCI INTERVALYM I/O - - - - I/O -
INTERVAL DAY TO
SECOND
I/O - - - - - I/O
OCCI INTERVALDS I/O - - - - - I/O
Note: When assigning a source with time zone to a target without a time zone, the time
zone portion of the source is ignored. On assigning a source without a time zone to a target
with a time zone, the time zone of the target is set to the session’s default time zone
(0) When assigning an Oracle DATE to a TIMESTAMP, the TIME portion of the DATE is
copied over to the TIMESTAMP. When assigning a TIMESTAMP to Oracle DATE, the
TIME portion of the result DATE is set to zero. This is done to encourage migration of
Oracle DATE to ANSI compliant DATETIME data types
(1) When assigning an ANSI DATE to an Oracle DATE or a TIMESTAMP, the TIME portion
of the Oracle DATE and the TIMESTAMP are set to zero. When assigning an Oracle DATE
or a TIMESTAMP to an ANSI DATE, the TIME portion is ignored
(2) When assigning a DATETIME to a character string, the DATETIME is converted using
the session’s default DATETIME format. When assigning a character string to a
DATETIME, the string must contain a valid DATETIME value based on the session’s
default DATETIME format
(3) When assigning a character string to an INTERVAL, the character string must be a valid
INTERVAL character format.
1. When converting from TSLTZ to CHAR, DATE, TIMESTAMP and TSTZ, the value
will be adjusted to the session time zone.
2. When converting from CHAR, DATE, and TIMESTAMP to TSLTZ, the session time
zone will be stored in memory.
3. When assigning TSLTZ to ANSI DATE, the time portion will be zero.
4. When converting from TSTZ, the time zone which the time stamp is in will be
stored in memory.
5. When assigning a character string to an interval, the character string must be a
valid interval character format.
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INTERVAL
YEAR TO
MONTH
NTERVAL
DAY TO
SECOND