![]() Returns the current timestamp, rendered in the database time zone (DB-TIMEZONE) This is particularly relevant if you want to use the different functions for the current timestamp: The time stamp values logged in statistical system tables are rendered in the database time zone ( DBTIMEZONE), set from EXAoperation.For details about the arithmetic on datetime values and the datetime functions, see the Scalar Functions and Operators. The literal for data type TIMESTAMP is considered, and the session time zone defines the corresponding moment on the time axis. There are no special literals for the data type TIMESTAMP WITH LOCAL TIME ZONE.For example, in your database client, the internal UTC normalized value is also converted to TIMESTAMP data type, considering the session time zone. This is like displaying a TIMESTAMP WITH LOCAL TIME ZONE value. When casting between the data types TIMESTAMP WITH LOCAL TIME ZONE and TIMESTAMP, the session time zone is evaluated, and the TIMESTAMP WITH LOCAL TIME ZONE is transformed into a normal TIMESTAMP data type.Therefore, the following combinations can be defined: ST - Interprets the value in Standard Time (ST)ĭST - Interprets the values in Daylight Saving Time (DST) When the time is moved backward in a time zone, then ambiguous timestamps exist which can be treated in the following different ways: SHIFT - Corrects the value by adding the daylight saving time offset (typically one hour)ĪDJUST - Rounds the value to the first valid value after the time shift If timestamps are located within this gap, it can be treated in the following different ways: When the time is set ahead in a time zone, then there is a gap. The string for option TIME_ZONE_BEHAVIOR consists of two parts: INVALID If such problematic data is inserted within the local session time zone, the session value TIME_ZONE_BEHAVIOR (changeable by ALTER SESSION) defines the course of action. Internally, the data is normalized to UTC because within certain time zones exist time shifts (for example, when switching from winter to summer time) and ambiguous periods (for example, when switching from summer to winter time). While TIMESTAMP is a simple structure consisting of a year, month, day, hour, minute, and second, data of type TIMESTAMP WITH LOCAL TIME ZONE represents a specific moment on the time axis.However, you should be aware that executing the same SQL statements in sessions with different time zones can lead to different results. Hence, users in different time zones can easily insert and display data without worrying about internal storage. In the case of TIMESTAMP WITH LOCAL TIME ZONE columns, the timestamps are internally normalized to UTC, while the input and output values are interpreted in the session time zone.Other considerations for data type TIMESTAMP WITH LOCAL TIME ZONE ![]() ![]() The range is similar to the TIMESTAMP type however, this type also considers the time zone. For more information, see ALTER SESSION and SESSIONTIMEZONE. ![]() Additionally, the data type TIMESTAMP WITH LOCAL TIME ZONE considers the session time zone. In addition to the date, TIMESTAMP contains the time. ![]() Of the various data types of the ANSI SQL standard, Exasol currently supports the DATE and TIMESTAMP types. ![]()
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