- new to_char(interval, text)
- new millisecond (ms) and microsecond (us) support
- more robus parsing from string - used is separator checking for
non-exact formats like to_date('2001-9-1', 'YYYY-MM-DD')
- SGML docs are included
Karel Zak
This commit is contained in:
Bruce Momjian
parent
74dde13e2c
commit
2a34134b6c
@ -1,4 +1,4 @@
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.68 2001/08/31 07:45:09 ishii Exp $ -->
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.69 2001/09/06 03:22:41 momjian Exp $ -->
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<chapter id="functions">
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<title>Functions and Operators</title>
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@ -1564,6 +1564,12 @@
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<entry>convert timestamp to string</entry>
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<entry>to_char(timestamp 'now','HH12:MI:SS')</entry>
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</row>
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<row>
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<entry>to_char(interval, text)</entry>
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<entry>text</entry>
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<entry>convert interval to string</entry>
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<entry>to_char(interval '15h 2m 12s','HH24:MI:SS')</entry>
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</row>
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<row>
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<entry>to_char(int, text)</entry>
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<entry>text</entry>
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@ -1645,6 +1651,14 @@
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<entry>SS</entry>
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<entry>second (00-59)</entry>
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</row>
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<row>
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<entry>MS</entry>
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<entry>millisecond (000-999)</entry>
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</row>
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<row>
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<entry>US</entry>
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<entry>microsecond (000000-999999)</entry>
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</row>
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<row>
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<entry>SSSS</entry>
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<entry>seconds past midnight (0-86399)</entry>
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@ -1911,6 +1925,23 @@
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<literal>to_date('20000Nov31', 'YYYYMonDD')</literal>.
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</para>
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</listitem>
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<listitem>
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<para>
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Millisecond <literal>MS</literal> and microcesond <literal>US</literal>
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values are in conversion from string to timestamp used as part of
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second after decimal point. For example
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<literal>to_timestamp('12:3', 'SS:MS')</literal> is not 3 milliseconds,
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but 300, because the conversion count it as <literal>12 + 0.3</literal>.
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It means for format 'SS:MS' is '12:3' or '12:30' or '12:300' same
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number of miliceconds. For the three milliseconds must be used
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'12:003' that the counversion count as
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<literal> 12 + 0.003 = 12.003 seconds </literal>. Here is a more
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complex example:
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<literal>to_timestamp('15:12:02.020.001230','HH:MI:SS.MS.US')</literal>
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is 15 hours, 12 minutes, 2.021230 seconds.
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</para>
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</listitem>
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</itemizedlist>
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</para>
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File diff suppressed because it is too large
Load Diff
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.49 2001/05/03 22:53:07 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.50 2001/09/06 03:22:42 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -33,9 +33,6 @@ static double time2t(const int hour, const int min, const double sec);
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static int EncodeSpecialTimestamp(Timestamp dt, char *str);
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static Timestamp dt2local(Timestamp dt, int timezone);
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static void dt2time(Timestamp dt, int *hour, int *min, double *sec);
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static int interval2tm(Interval span, struct tm * tm, float8 *fsec);
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static int tm2interval(struct tm * tm, double fsec, Interval *span);
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/*****************************************************************************
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* USER I/O ROUTINES *
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@ -412,7 +409,7 @@ tm2timestamp(struct tm * tm, double fsec, int *tzp, Timestamp *result)
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/* interval2tm()
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* Convert a interval data type to a tm structure.
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*/
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static int
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int
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interval2tm(Interval span, struct tm * tm, float8 *fsec)
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{
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double time;
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@ -444,7 +441,7 @@ interval2tm(Interval span, struct tm * tm, float8 *fsec)
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return 0;
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} /* interval2tm() */
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static int
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int
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tm2interval(struct tm * tm, double fsec, Interval *span)
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{
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span->month = ((tm->tm_year * 12) + tm->tm_mon);
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@ -7,7 +7,7 @@
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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: pg_proc.h,v 1.207 2001/08/26 16:56:02 tgl Exp $
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* $Id: pg_proc.h,v 1.208 2001/09/06 03:22:42 momjian Exp $
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*
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* NOTES
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* The script catalog/genbki.sh reads this file and generates .bki
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@ -2476,10 +2476,12 @@ DATA(insert OID = 1776 ( to_char PGUID 12 f t f t 2 f 25 "701 25" 100 0 0 100
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DESCR("format float8 to text");
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DATA(insert OID = 1777 ( to_number PGUID 12 f t f t 2 f 1700 "25 25" 100 0 0 100 numeric_to_number - ));
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DESCR("convert text to numeric");
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DATA(insert OID = 1778 ( to_timestamp PGUID 12 f t f t 2 f 1184 "25 25" 100 0 0 100 to_timestamp - ));
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DATA(insert OID = 1778 ( to_timestamp PGUID 12 f t f t 2 f 1184 "25 25" 100 0 0 100 to_timestamp - ));
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DESCR("convert text to timestamp");
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DATA(insert OID = 1780 ( to_date PGUID 12 f t f t 2 f 1082 "25 25" 100 0 0 100 to_date - ));
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DESCR("convert text to date");
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DATA(insert OID = 1768 ( to_char PGUID 12 f t f t 2 f 25 "1186 25" 100 0 0 100 interval_to_char - ));
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DESCR("format interval to text");
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DATA(insert OID = 1282 ( quote_ident PGUID 12 f t t t 1 f 25 "25" 100 0 0 100 quote_ident - ));
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DESCR("quote an identifier for usage in a querystring");
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@ -2,7 +2,7 @@
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/* -----------------------------------------------------------------------
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* formatting.h
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*
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* $Id: formatting.h,v 1.7 2001/01/24 19:43:28 momjian Exp $
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* $Id: formatting.h,v 1.8 2001/09/06 03:22:42 momjian Exp $
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*
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*
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* Portions Copyright (c) 1999-2000, PostgreSQL Global Development Group
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@ -10,7 +10,7 @@
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* The PostgreSQL routines for a DateTime/int/float/numeric formatting,
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* inspire with Oracle TO_CHAR() / TO_DATE() / TO_NUMBER() routines.
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*
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* Karel Zak - Zakkr
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* Karel Zak
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*
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* -----------------------------------------------------------------------
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*/
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@ -22,6 +22,7 @@
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extern Datum timestamp_to_char(PG_FUNCTION_ARGS);
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extern Datum interval_to_char(PG_FUNCTION_ARGS);
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extern Datum to_timestamp(PG_FUNCTION_ARGS);
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extern Datum to_date(PG_FUNCTION_ARGS);
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extern Datum numeric_to_number(PG_FUNCTION_ARGS);
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@ -6,7 +6,7 @@
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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: timestamp.h,v 1.16 2001/03/22 04:01:14 momjian Exp $
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* $Id: timestamp.h,v 1.17 2001/09/06 03:22:42 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -177,6 +177,9 @@ extern int tm2timestamp(struct tm * tm, double fsec, int *tzp, Timestamp *dt);
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extern int timestamp2tm(Timestamp dt, int *tzp, struct tm * tm,
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double *fsec, char **tzn);
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extern int interval2tm(Interval span, struct tm * tm, float8 *fsec);
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extern int tm2interval(struct tm * tm, double fsec, Interval *span);
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extern Timestamp SetTimestamp(Timestamp timestamp);
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extern void isoweek2date(int woy, int *year, int *mon, int *mday);
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