![]() Subtract argument from current_date (at midnight)Īge(timestamp '') → 62 years 6 mons 10 daysĬlock_timestamp ( ) → timestamp with time zoneĬurrent date and time (changes during statement execution) see Section 9.9.4Ĭurrent_time ( integer ) → time with time zoneĬurrent time of day, with limited precision see Section 9.9.4Ĭurrent_timestamp → timestamp with time zoneĬurrent date and time (start of current transaction) see Section 9.9.4Ĭurrent_timestamp ( integer ) → timestamp with time zoneĬurrent date and time (start of current transaction), with limited precision see Section 9.9.4ĭate_part ( text, timestamp ) → double precision Subtract arguments, producing a “ symbolic” result that uses years and months, rather than just daysĪge(timestamp '', timestamp '') → 43 years 9 mons 27 days Subtract timestamps (converting 24-hour intervals into days, similarly to justify_hours()) Subtract dates, producing the number of days elapsed Also, the + and * operators come in commutative pairs (for example both date + integer and integer + date) we show only one of each such pair. For brevity, these variants are not shown separately. Similarly, a date value is assumed to represent midnight in the TimeZone zone when comparing it to a timestamp.Īll the functions and operators described below that take time or timestamp inputs actually come in two variants: one that takes time with time zone or timestamp with time zone, and one that takes time without time zone or timestamp without time zone. When comparing a timestamp without time zone to a timestamp with time zone, the former value is assumed to be given in the time zone specified by the TimeZone configuration parameter, and is rotated to UTC for comparison to the latter value (which is already in UTC internally). Dates and timestamps (with or without time zone) are all comparable, while times (with or without time zone) and intervals can only be compared to other values of the same data type. In addition, the usual comparison operators shown in Table 9.1 are available for the date/time types. You should be familiar with the background information on date/time data types from Section 8.5. For formatting functions, refer to Section 9.8. Table 9.31 illustrates the behaviors of the basic arithmetic operators ( +, *, etc.). Table 9.32 shows the available functions for date/time value processing, with details appearing in the following subsections. Interval data supports the following operations with other types.9.9.1. You can cast from the following types to interval: Materialize only supports 9 places of decimal precision. ![]() Only PostgreSQL time_exprs support non-second fractional time_units, e.g.ġ.2 days. While 1:2 MINUTE TO SECOND interprets as (minute, seconds). You cannot then include another time_expr which writes toĪ two-field time_expr like '1:2' is by default interpreted as (hour, minute) Writes to all other time_units in the same group, even if that time_unitįor example, the time_expr '1:2' (1 hour, 2 minutes) also writes a value Using a SQL Standard time_expr to write to any of these time_units SQL Standard time_expr uses the following groups of time_units: You can write time_exprs in any order, e.g 'H:M:S.NS Y-M'. You can freely mix SQL Standard- and PostgreSQL-style time_exprs. Like PostgreSQL, Materialize’s implementation includes the following '1 year 2 months 3.4 days 5 hours 6 minutes 7 seconds 8 milliseconds'.Offers support for two types of time_expr syntax: Materialize strives for full PostgreSQL compatibility with time_exprs, which ![]() This is the case of the most common interval format like INTERVAL '1' MINUTE. ![]() If the final time_expr is only a number, treat the time_expr as belonging to tail_time_unit. Return an interval without time_unit smaller than tail_time_unit. Note that this differs from PostgreSQL’s implementation, which ignores this clause.ġ. Return an interval without time_units larger than head_time_unit. MILLENNIUM CENTURY DECADE YEAR MONTH DAY HOUR MINUTE SECOND MILLISECONDS MICROSECONDS FieldĪ string representing years and months in Y-M D format.Ī string representing hours, minutes, seconds, and nanoseconds in H:M:S.NS format.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |