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Thomas G. Lockhart
547df0cc85
Use "--enable-integer-datetimes" in configuration to use this rather than the original float8 storage. I would recommend the integer-based storage for any platform on which it is available. We perhaps should make this the default for the production release. Change timezone(timestamptz) results to return timestamp rather than a character string. Formerly, we didn't have a way to represent timestamps with an explicit time zone other than freezing the info into a string. Now, we can reasonably omit the explicit time zone from the result and return a timestamp with values appropriate for the specified time zone. Much cleaner, and if you need the time zone in the result you can put it into a character string pretty easily anyway. Allow fractional seconds in date/time types even for dates prior to 1BC. Limit timestamp data types to 6 decimal places of precision. Just right for a micro-second storage of int8 date/time types, and reduces the number of places ad-hoc rounding was occuring for the float8-based types. Use lookup tables for precision/rounding calculations for timestamp and interval types. Formerly used pow() to calculate the desired value but with a more limited range there is no reason to not type in a lookup table. Should be *much* better performance, though formerly there were some optimizations to help minimize the number of times pow() was called. Define a HAVE_INT64_TIMESTAMP variable. Based on the configure option "--enable-integer-datetimes" and the existing internal INT64_IS_BUSTED. Add explicit date/interval operators and functions for addition and subtraction. Formerly relied on implicit type promotion from date to timestamp with time zone. Change timezone conversion functions for the timetz type from "timetz()" to "timezone()". This is consistant with other time zone coersion functions for other types. Bump the catalog version to 200204201. Fix up regression tests to reflect changes in fractional seconds representation for date/times in BC eras. All regression tests pass on my Linux box.
144 lines
4.9 KiB
C
144 lines
4.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* date.h
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* Definitions for the SQL92 "date" and "time" types.
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: date.h,v 1.18 2002/04/21 19:48:31 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef DATE_H
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#define DATE_H
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#include "c.h"
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#include "fmgr.h"
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typedef int32 DateADT;
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#ifdef HAVE_INT64_TIMESTAMP
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typedef int64 TimeADT;
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#else
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typedef float8 TimeADT;
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#endif
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typedef struct
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{
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#ifdef HAVE_INT64_TIMESTAMP
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int64 time; /* all time units other than months and years */
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#else
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double time; /* all time units other than months and years */
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#endif
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int32 zone; /* numeric time zone, in seconds */
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} TimeTzADT;
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#ifdef HAVE_INT64_TIMESTAMP
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#define MAX_TIME_PRECISION 6
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#else
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#define MAX_TIME_PRECISION 13
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#endif
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/*
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* Macros for fmgr-callable functions.
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*
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* For TimeADT, we make use of the same support routines as for float8.
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* Therefore TimeADT is pass-by-reference if and only if float8 is!
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*/
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#define DatumGetDateADT(X) ((DateADT) DatumGetInt32(X))
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#define DatumGetTimeADT(X) ((TimeADT) DatumGetFloat8(X))
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#define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X))
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#define DateADTGetDatum(X) Int32GetDatum(X)
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#define TimeADTGetDatum(X) Float8GetDatum(X)
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#define TimeTzADTPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_DATEADT(n) DatumGetDateADT(PG_GETARG_DATUM(n))
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#define PG_GETARG_TIMEADT(n) DatumGetTimeADT(PG_GETARG_DATUM(n))
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#define PG_GETARG_TIMETZADT_P(n) DatumGetTimeTzADTP(PG_GETARG_DATUM(n))
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#define PG_RETURN_DATEADT(x) return DateADTGetDatum(x)
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#define PG_RETURN_TIMEADT(x) return TimeADTGetDatum(x)
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#define PG_RETURN_TIMETZADT_P(x) return TimeTzADTPGetDatum(x)
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/* date.c */
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extern Datum date_in(PG_FUNCTION_ARGS);
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extern Datum date_out(PG_FUNCTION_ARGS);
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extern Datum date_eq(PG_FUNCTION_ARGS);
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extern Datum date_ne(PG_FUNCTION_ARGS);
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extern Datum date_lt(PG_FUNCTION_ARGS);
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extern Datum date_le(PG_FUNCTION_ARGS);
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extern Datum date_gt(PG_FUNCTION_ARGS);
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extern Datum date_ge(PG_FUNCTION_ARGS);
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extern Datum date_cmp(PG_FUNCTION_ARGS);
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extern Datum date_larger(PG_FUNCTION_ARGS);
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extern Datum date_smaller(PG_FUNCTION_ARGS);
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extern Datum date_mi(PG_FUNCTION_ARGS);
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extern Datum date_pli(PG_FUNCTION_ARGS);
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extern Datum date_mii(PG_FUNCTION_ARGS);
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extern Datum date_timestamp(PG_FUNCTION_ARGS);
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extern Datum timestamp_date(PG_FUNCTION_ARGS);
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extern Datum date_timestamptz(PG_FUNCTION_ARGS);
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extern Datum timestamptz_date(PG_FUNCTION_ARGS);
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extern Datum datetime_timestamp(PG_FUNCTION_ARGS);
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extern Datum abstime_date(PG_FUNCTION_ARGS);
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extern Datum text_date(PG_FUNCTION_ARGS);
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extern Datum date_text(PG_FUNCTION_ARGS);
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extern Datum time_in(PG_FUNCTION_ARGS);
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extern Datum time_out(PG_FUNCTION_ARGS);
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extern Datum time_scale(PG_FUNCTION_ARGS);
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extern Datum time_eq(PG_FUNCTION_ARGS);
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extern Datum time_ne(PG_FUNCTION_ARGS);
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extern Datum time_lt(PG_FUNCTION_ARGS);
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extern Datum time_le(PG_FUNCTION_ARGS);
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extern Datum time_gt(PG_FUNCTION_ARGS);
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extern Datum time_ge(PG_FUNCTION_ARGS);
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extern Datum time_cmp(PG_FUNCTION_ARGS);
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extern Datum overlaps_time(PG_FUNCTION_ARGS);
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extern Datum time_larger(PG_FUNCTION_ARGS);
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extern Datum time_smaller(PG_FUNCTION_ARGS);
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extern Datum time_mi_time(PG_FUNCTION_ARGS);
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extern Datum timestamp_time(PG_FUNCTION_ARGS);
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extern Datum timestamptz_time(PG_FUNCTION_ARGS);
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extern Datum time_interval(PG_FUNCTION_ARGS);
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extern Datum interval_time(PG_FUNCTION_ARGS);
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extern Datum text_time(PG_FUNCTION_ARGS);
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extern Datum time_text(PG_FUNCTION_ARGS);
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extern Datum time_pl_interval(PG_FUNCTION_ARGS);
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extern Datum time_mi_interval(PG_FUNCTION_ARGS);
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extern Datum interval_pl_time(PG_FUNCTION_ARGS);
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extern Datum time_part(PG_FUNCTION_ARGS);
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extern Datum timetz_in(PG_FUNCTION_ARGS);
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extern Datum timetz_out(PG_FUNCTION_ARGS);
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extern Datum timetz_scale(PG_FUNCTION_ARGS);
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extern Datum timetz_eq(PG_FUNCTION_ARGS);
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extern Datum timetz_ne(PG_FUNCTION_ARGS);
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extern Datum timetz_lt(PG_FUNCTION_ARGS);
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extern Datum timetz_le(PG_FUNCTION_ARGS);
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extern Datum timetz_gt(PG_FUNCTION_ARGS);
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extern Datum timetz_ge(PG_FUNCTION_ARGS);
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extern Datum timetz_cmp(PG_FUNCTION_ARGS);
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extern Datum timetz_hash(PG_FUNCTION_ARGS);
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extern Datum overlaps_timetz(PG_FUNCTION_ARGS);
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extern Datum timetz_larger(PG_FUNCTION_ARGS);
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extern Datum timetz_smaller(PG_FUNCTION_ARGS);
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extern Datum timetz_time(PG_FUNCTION_ARGS);
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extern Datum time_timetz(PG_FUNCTION_ARGS);
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extern Datum timestamptz_timetz(PG_FUNCTION_ARGS);
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extern Datum datetimetz_timestamptz(PG_FUNCTION_ARGS);
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extern Datum text_timetz(PG_FUNCTION_ARGS);
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extern Datum timetz_text(PG_FUNCTION_ARGS);
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extern Datum timetz_part(PG_FUNCTION_ARGS);
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extern Datum timetz_zone(PG_FUNCTION_ARGS);
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extern Datum timetz_izone(PG_FUNCTION_ARGS);
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extern Datum timetz_pl_interval(PG_FUNCTION_ARGS);
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extern Datum timetz_mi_interval(PG_FUNCTION_ARGS);
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#endif /* DATE_H */
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