mirror of https://github.com/postgres/postgres
* to_char:
- full support for IW (ISO week) and vice versa conversion for IW too
(the to_char 'week' support is now complete and I hope correct).
Thomas, I use for IW code from timestamp.c, for this I create separate
function date2isoweek() from original 'case DTK_WEEK:' code in the
timestamp_part(). I mean will better use one code for same feature in
date_part() and in to_char(). The isoweek2date() is added to timestamp.c
too. Right?
IMHO in 7.1 will all to_char's features complete. It is cca 41 templates
for date/time and cca 21 for numbers.
* to_ascii:
- gcc, is it correct now? :-)
In the patch is documentation for to_char's IW and for to_ascii().
Karel
This commit is contained in:
Bruce Momjian
parent
d4f626507c
commit
dffd8cac3d
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@ -355,6 +355,12 @@
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</row>
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</thead>
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<tbody>
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<row>
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<entry>to_ascii(text [,name|int])</entry>
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<entry>text</entry>
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<entry>convert text from multibyte encoding to ASCII</entry>
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<entry>to_ascii('Karel')</entry>
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</row>
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<row>
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<entry>char(text)</entry>
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<entry>char</entry>
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@ -447,6 +453,9 @@
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<para>
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Most functions explicitly defined for text will work for char() and varchar() arguments.
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</para>
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<para>
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The to_ascii() support conversion from LATIN1, LATIN2, WIN1250 (CP1250) only.
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</para>
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</sect1>
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<sect1>
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@ -803,6 +812,10 @@
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<entry>WW</entry>
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<entry>week number of year (1-53) where first week start on the first day of the year</entry>
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</row>
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<row>
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<entry>IW</entry>
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<entry>ISO week number of year</entry>
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</row>
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<row>
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<entry>CC</entry>
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<entry>century (2 digits)</entry>
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@ -1,7 +1,7 @@
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/* -----------------------------------------------------------------------
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* formatting.c
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/formatting.c,v 1.20 2000/07/29 03:26:41 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/formatting.c,v 1.21 2000/08/29 04:41:47 momjian Exp $
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*
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*
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* Portions Copyright (c) 1999-2000, PostgreSQL, Inc
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@ -344,24 +344,24 @@ static int NUMCounter = 0;
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* ----------
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*/
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typedef struct {
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int hh, am, pm, mi, ss, ssss, d, dd, ddd, mm, yyyy, bc, ww, w, cc, q, j;
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int hh, am, pm, mi, ss, ssss, d, dd, ddd, mm, yyyy, bc, iw, ww, w, cc, q, j;
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} TmFromChar;
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#define ZERO_tmfc( _X ) \
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do { \
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(_X)->hh= (_X)->am= (_X)->pm= (_X)->mi= (_X)->ss= (_X)->ssss= \
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(_X)->d= (_X)->dd= (_X)->ddd= (_X)->mm= (_X)->yyyy= (_X)->bc= \
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(_X)->ww= (_X)->w= (_X)->cc= (_X)->q= (_X)->j= 0; \
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(_X)->iw= (_X)->ww= (_X)->w= (_X)->cc= (_X)->q= (_X)->j= 0; \
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} while(0)
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#ifdef DEBUG_TO_FROM_CHAR
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#define NOTICE_TMFC \
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elog(DEBUG_elog_output, "TMFC:\nhh %d\nam %d\npm %d\nmi %d\nss %d\nssss %d\nd %d\ndd %d\nddd %d\nmm %d\nyyyy %d\nbc %d\nww %d\nw %d\ncc %d\nq %d\nj %d", \
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elog(DEBUG_elog_output, "TMFC:\nhh %d\nam %d\npm %d\nmi %d\nss %d\nssss %d\nd %d\ndd %d\nddd %d\nmm %d\nyyyy %d\nbc %d\niw %d\nww %d\nw %d\ncc %d\nq %d\nj %d", \
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tmfc->hh, tmfc->am, tmfc->pm, tmfc->mi, tmfc->ss, \
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tmfc->ssss, tmfc->d, tmfc->dd, tmfc->ddd, tmfc->mm, \
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tmfc->yyyy, tmfc->bc, tmfc->ww, tmfc->w, tmfc->cc, \
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tmfc->q, tmfc->j);
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tmfc->yyyy, tmfc->bc, tmfc->iw, tmfc->ww, tmfc->w, \
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tmfc->cc, tmfc->q, tmfc->j);
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#define NOTICE_TM \
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elog(DEBUG_elog_output, "TM:\nsec %d\nyear %d\nmin %d\nwday %d\nhour %d\nyday %d\nmday %d\nnisdst %d\nmon %d\n",\
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@ -487,6 +487,7 @@ typedef enum
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DCH_HH24,
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DCH_HH12,
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DCH_HH,
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DCH_IW,
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DCH_J,
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DCH_MI,
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DCH_MM,
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@ -524,6 +525,7 @@ typedef enum
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DCH_hh24,
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DCH_hh12,
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DCH_hh,
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DCH_iw,
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DCH_j,
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DCH_mi,
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DCH_mm,
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@ -596,14 +598,14 @@ typedef enum
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* ----------
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*/
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static KeyWord DCH_keywords[] = {
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/* keyword, len, func. type is in Index */
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/* keyword,len,func.type is in Index */
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{"A.D.", 4, dch_date, DCH_A_D}, /* A */
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{"A.M.", 4, dch_time, DCH_A_M},
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{"AD", 2, dch_date, DCH_AD},
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{"AM", 2, dch_time, DCH_AM},
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{"B.C.", 4, dch_date, DCH_B_C}, /* B */
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{"BC", 2, dch_date, DCH_BC},
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{"CC", 2, dch_date, DCH_CC},/* C */
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{"CC", 2, dch_date, DCH_CC}, /* C */
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{"DAY", 3, dch_date, DCH_DAY}, /* D */
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{"DDD", 3, dch_date, DCH_DDD},
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{"DD", 2, dch_date, DCH_DD},
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@ -615,7 +617,8 @@ static KeyWord DCH_keywords[] = {
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{"HH24", 4, dch_time, DCH_HH24}, /* H */
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{"HH12", 4, dch_time, DCH_HH12},
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{"HH", 2, dch_time, DCH_HH},
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{"J", 1, dch_date, DCH_J}, /* J */
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{"IW", 2, dch_date, DCH_IW}, /* I */
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{"J", 1, dch_date, DCH_J}, /* J */
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{"MI", 2, dch_time, DCH_MI},
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{"MM", 2, dch_date, DCH_MM},
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{"MONTH", 5, dch_date, DCH_MONTH},
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@ -624,12 +627,12 @@ static KeyWord DCH_keywords[] = {
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{"Mon", 3, dch_date, DCH_Mon},
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{"P.M.", 4, dch_time, DCH_P_M}, /* P */
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{"PM", 2, dch_time, DCH_PM},
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{"Q", 1, dch_date, DCH_Q}, /* Q */
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{"RM", 2, dch_date, DCH_RM},/* R */
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{"Q", 1, dch_date, DCH_Q}, /* Q */
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{"RM", 2, dch_date, DCH_RM}, /* R */
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{"SSSS", 4, dch_time, DCH_SSSS}, /* S */
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{"SS", 2, dch_time, DCH_SS},
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{"TZ", 2, dch_time, DCH_TZ}, /* T */
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{"WW", 2, dch_date, DCH_WW},/* W */
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{"WW", 2, dch_date, DCH_WW}, /* W */
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{"W", 1, dch_date, DCH_W},
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{"Y,YYY", 5, dch_date, DCH_Y_YYY}, /* Y */
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{"YYYY", 4, dch_date, DCH_YYYY},
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@ -642,7 +645,7 @@ static KeyWord DCH_keywords[] = {
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{"am", 2, dch_time, DCH_am},
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{"b.c.", 4, dch_date, DCH_b_c}, /* b */
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{"bc", 2, dch_date, DCH_bc},
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{"cc", 2, dch_date, DCH_CC},/* c */
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{"cc", 2, dch_date, DCH_CC}, /* c */
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{"day", 3, dch_date, DCH_day}, /* d */
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{"ddd", 3, dch_date, DCH_DDD},
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{"dd", 2, dch_date, DCH_DD},
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@ -652,19 +655,20 @@ static KeyWord DCH_keywords[] = {
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{"hh24", 4, dch_time, DCH_HH24}, /* h */
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{"hh12", 4, dch_time, DCH_HH12},
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{"hh", 2, dch_time, DCH_HH},
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{"j", 1, dch_time, DCH_J}, /* j */
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{"mi", 2, dch_time, DCH_MI},/* m */
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{"iw", 2, dch_date, DCH_IW}, /* i */
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{"j", 1, dch_time, DCH_J}, /* j */
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{"mi", 2, dch_time, DCH_MI}, /* m */
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{"mm", 2, dch_date, DCH_MM},
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{"month", 5, dch_date, DCH_month},
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{"mon", 3, dch_date, DCH_mon},
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{"p.m.", 4, dch_time, DCH_p_m}, /* p */
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{"pm", 2, dch_time, DCH_pm},
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{"q", 1, dch_date, DCH_Q}, /* q */
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{"rm", 2, dch_date, DCH_rm},/* r */
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{"q", 1, dch_date, DCH_Q}, /* q */
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{"rm", 2, dch_date, DCH_rm}, /* r */
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{"ssss", 4, dch_time, DCH_SSSS}, /* s */
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{"ss", 2, dch_time, DCH_SS},
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{"tz", 2, dch_time, DCH_tz}, /* t */
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{"ww", 2, dch_date, DCH_WW},/* w */
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{"ww", 2, dch_date, DCH_WW}, /* w */
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{"w", 1, dch_date, DCH_W},
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{"y,yyy", 5, dch_date, DCH_Y_YYY}, /* y */
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{"yyyy", 4, dch_date, DCH_YYYY},
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@ -735,10 +739,10 @@ static int DCH_index[KeyWord_INDEX_SIZE] = {
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, DCH_A_D, DCH_B_C, DCH_CC, DCH_DAY, -1,
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DCH_FX, -1, DCH_HH24, -1, DCH_J, -1, -1, DCH_MI, -1, -1,
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DCH_FX, -1, DCH_HH24, DCH_IW, DCH_J, -1, -1, DCH_MI, -1, -1,
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DCH_P_M, DCH_Q, DCH_RM, DCH_SSSS, DCH_TZ, -1, -1, DCH_WW, -1, DCH_Y_YYY,
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-1, -1, -1, -1, -1, -1, -1, DCH_a_d, DCH_b_c, DCH_cc,
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DCH_day, -1, DCH_fx, -1, DCH_hh24, -1, DCH_j, -1, -1, DCH_mi,
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DCH_day, -1, DCH_fx, -1, DCH_hh24, DCH_iw, DCH_j, -1, -1, DCH_mi,
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-1, -1, DCH_p_m, DCH_q, DCH_rm, DCH_ssss, DCH_tz, -1, -1, DCH_ww,
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-1, DCH_y_yyy, -1, -1, -1, -1
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@ -1526,8 +1530,8 @@ dch_global(int arg, char *inout, int suf, int flag, FormatNode *node)
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/* ----------
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* Master function of TIME for:
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* TO_CHAR - write (inout) formated string
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* FROM_CHAR - scan (inout) string by course of FormatNode
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* TO_CHAR - write (inout) formated string
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* FROM_CHAR - scan (inout) string by course of FormatNode
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* ----------
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*/
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static int
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@ -1772,7 +1776,7 @@ do { \
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/* ----------
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* Master of DATE for:
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* TO_CHAR - write (inout) formated string
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* TO_CHAR - write (inout) formated string
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* FROM_CHAR - scan (inout) string by course of FormatNode
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* ----------
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*/
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@ -2086,6 +2090,33 @@ dch_date(int arg, char *inout, int suf, int flag, FormatNode *node)
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return 1 + SKIP_THth(suf);
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}
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}
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break;
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case DCH_IW:
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if (flag == TO_CHAR)
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{
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sprintf(inout, "%0*d", S_FM(suf) ? 0 : 2,
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date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday));
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if (S_THth(suf))
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str_numth(p_inout, inout, S_TH_TYPE(suf));
|
||||
if (S_FM(suf) || S_THth(suf))
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||||
return strlen(p_inout) - 1;
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||||
else
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||||
return 1;
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||||
|
||||
}
|
||||
else if (flag == FROM_CHAR)
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||||
{
|
||||
if (S_FM(suf))
|
||||
{
|
||||
sscanf(inout, "%d", &tmfc->iw);
|
||||
return int4len((int4) tmfc->iw) - 1 + SKIP_THth(suf);
|
||||
}
|
||||
else
|
||||
{
|
||||
sscanf(inout, "%02d", &tmfc->iw);
|
||||
return 1 + SKIP_THth(suf);
|
||||
}
|
||||
}
|
||||
break;
|
||||
case DCH_Q:
|
||||
if (flag == TO_CHAR)
|
||||
|
|
@ -2687,19 +2718,29 @@ to_timestamp(PG_FUNCTION_ARGS)
|
|||
case 4: tm->tm_mday = 1; tm->tm_mon = 10; break;
|
||||
}
|
||||
|
||||
if (tmfc->j)
|
||||
j2date(tmfc->j, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
||||
if (tmfc->yyyy)
|
||||
tm->tm_year = tmfc->yyyy;
|
||||
|
||||
if (tmfc->j)
|
||||
j2date(tmfc->j, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
||||
|
||||
if (tmfc->bc && tm->tm_year > 0)
|
||||
tm->tm_year = -(tm->tm_year);
|
||||
|
||||
if (tm->tm_year < 0)
|
||||
tm->tm_year = tm->tm_year + 1;
|
||||
|
||||
if (tmfc->iw)
|
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isoweek2date(tmfc->iw, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
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|
||||
if (tmfc->d) tm->tm_wday = tmfc->d;
|
||||
if (tmfc->dd) tm->tm_mday = tmfc->dd;
|
||||
if (tmfc->ddd) tm->tm_yday = tmfc->ddd;
|
||||
if (tmfc->mm) tm->tm_mon = tmfc->mm;
|
||||
|
||||
/*
|
||||
* we not ignore DDD
|
||||
*/
|
||||
if (tmfc->ddd && (tm->tm_mon <=1 || tm->tm_mday <=1))
|
||||
{
|
||||
/* count mday and mon from yday */
|
||||
|
|
@ -2726,6 +2767,7 @@ to_timestamp(PG_FUNCTION_ARGS)
|
|||
tm->tm_mday = i == 0 ? tm->tm_yday :
|
||||
tm->tm_yday - y[i-1];
|
||||
}
|
||||
|
||||
/* -------------------------------------------------------------- */
|
||||
|
||||
#ifdef DEBUG_TO_FROM_CHAR
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
/* -----------------------------------------------------------------------
|
||||
* pg_locale.c
|
||||
*
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.5 2000/06/29 01:19:36 momjian Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.6 2000/08/29 04:41:47 momjian Exp $
|
||||
*
|
||||
*
|
||||
* Portions Copyright (c) 1999-2000, PostgreSQL, Inc
|
||||
|
|
@ -26,6 +26,8 @@
|
|||
/* #define DEBUG_LOCALE_UTILS */
|
||||
|
||||
|
||||
static struct lconv *CurrentLocaleConv = NULL;
|
||||
|
||||
/*------
|
||||
* Return in PG_LocaleCategories current locale setting
|
||||
*------
|
||||
|
|
@ -119,7 +121,9 @@ struct lconv *
|
|||
PGLC_localeconv(void)
|
||||
{
|
||||
PG_LocaleCategories lc;
|
||||
struct lconv *lconv;
|
||||
|
||||
if (CurrentLocaleConv)
|
||||
return CurrentLocaleConv;
|
||||
|
||||
/* Save current locale setting to lc */
|
||||
PGLC_current(&lc);
|
||||
|
|
@ -128,12 +132,12 @@ PGLC_localeconv(void)
|
|||
setlocale(LC_ALL, "");
|
||||
|
||||
/* Get numeric formatting information */
|
||||
lconv = localeconv();
|
||||
CurrentLocaleConv = localeconv();
|
||||
|
||||
/* Set previous original locale */
|
||||
PGLC_setlocale(&lc);
|
||||
|
||||
return lconv;
|
||||
return CurrentLocaleConv;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.34 2000/07/17 03:05:18 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/adt/timestamp.c,v 1.35 2000/08/29 04:41:47 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -1796,7 +1796,81 @@ interval_trunc(PG_FUNCTION_ARGS)
|
|||
PG_RETURN_INTERVAL_P(result);
|
||||
}
|
||||
|
||||
/* isoweek2date()
|
||||
*
|
||||
* Convert ISO week of year number to date. An year must be already set.
|
||||
* karel 2000/08/07
|
||||
*/
|
||||
void
|
||||
isoweek2date( int woy, int *year, int *mon, int *mday)
|
||||
{
|
||||
int day0, day4, dayn;
|
||||
|
||||
if (!*year)
|
||||
elog(ERROR, "isoweek2date(): can't convert without year information");
|
||||
|
||||
/* fourth day of current year */
|
||||
day4 = date2j(*year, 1, 4);
|
||||
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
|
||||
dayn = ((woy - 1) * 7) + (day4 - day0);
|
||||
|
||||
j2date(dayn, year, mon, mday);
|
||||
}
|
||||
|
||||
/* date2isoweek()
|
||||
*
|
||||
* Returns ISO week number of year.
|
||||
*/
|
||||
int
|
||||
date2isoweek(int year, int mon, int mday)
|
||||
{
|
||||
float8 result;
|
||||
int day0, day4, dayn;
|
||||
|
||||
/* current day */
|
||||
dayn = date2j(year, mon, mday);
|
||||
|
||||
/* fourth day of current year */
|
||||
day4 = date2j(year, 1, 4);
|
||||
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
|
||||
/* We need the first week containing a Thursday,
|
||||
* otherwise this day falls into the previous year
|
||||
* for purposes of counting weeks
|
||||
*/
|
||||
if (dayn < (day4 - day0))
|
||||
{
|
||||
day4 = date2j((year - 1), 1, 4);
|
||||
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
}
|
||||
|
||||
result = (((dayn - (day4 - day0)) / 7) + 1);
|
||||
|
||||
/* Sometimes the last few days in a year will fall into
|
||||
* the first week of the next year, so check for this.
|
||||
*/
|
||||
if (result >= 53)
|
||||
{
|
||||
day4 = date2j((year + 1), 1, 4);
|
||||
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
|
||||
if (dayn >= (day4 - day0))
|
||||
result = (((dayn - (day4 - day0)) / 7) + 1);
|
||||
}
|
||||
|
||||
return (int) result;
|
||||
}
|
||||
|
||||
|
||||
/* timestamp_part()
|
||||
* Extract specified field from timestamp.
|
||||
*/
|
||||
|
|
@ -1897,35 +1971,7 @@ timestamp_part(PG_FUNCTION_ARGS)
|
|||
break;
|
||||
|
||||
case DTK_WEEK:
|
||||
{
|
||||
int day0, day4, dayn;
|
||||
dayn = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
|
||||
day4 = date2j(tm->tm_year, 1, 4);
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
/* We need the first week containing a Thursday,
|
||||
* otherwise this day falls into the previous year
|
||||
* for purposes of counting weeks
|
||||
*/
|
||||
if (dayn < (day4 - day0))
|
||||
{
|
||||
day4 = date2j((tm->tm_year - 1), 1, 4);
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
}
|
||||
result = (((dayn - (day4 - day0)) / 7) + 1);
|
||||
/* Sometimes the last few days in a year will fall into
|
||||
* the first week of the next year, so check for this.
|
||||
*/
|
||||
if (result >= 53)
|
||||
{
|
||||
day4 = date2j((tm->tm_year + 1), 1, 4);
|
||||
/* day0 == offset to first day of week (Monday) */
|
||||
day0 = (j2day(day4 - 1) % 7);
|
||||
if (dayn >= (day4 - day0))
|
||||
result = (((dayn - (day4 - day0)) / 7) + 1);
|
||||
}
|
||||
}
|
||||
result = (float8) date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday);
|
||||
break;
|
||||
|
||||
case DTK_YEAR:
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@
|
|||
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: timestamp.h,v 1.9 2000/07/17 03:05:32 tgl Exp $
|
||||
* $Id: timestamp.h,v 1.10 2000/08/29 04:41:48 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -190,4 +190,7 @@ extern int timestamp2tm(Timestamp dt, int *tzp, struct tm * tm,
|
|||
|
||||
extern Timestamp SetTimestamp(Timestamp timestamp);
|
||||
|
||||
extern void isoweek2date( int woy, int *year, int *mon, int *mday);
|
||||
extern int date2isoweek(int year, int mon, int mday);
|
||||
|
||||
#endif /* TIMESTAMP_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue