WL#1264 "Per-thread time zone support infrastructure".

Added basic per-thread time zone functionality (based on public
domain elsie-code). Now user can select current time zone
(from the list of time zones described in system tables).
All NOW-like functions honor this time zone, values of TIMESTAMP
type are interpreted as values in this time zone, so now
our TIMESTAMP type behaves similar to Oracle's TIMESTAMP WITH
LOCAL TIME ZONE (or proper PostgresSQL type).
  
WL#1266 "CONVERT_TZ() - basic time with time zone conversion 
function".
  
Fixed problems described in Bug #2336 (Different number of warnings 
when inserting bad datetime as string or as number). This required
reworking of datetime realted warning hadling (they now generated 
at Field object level not in conversion functions).
  
Optimization: Now Field class descendants use table->in_use member
instead of current_thd macro.


include/my_global.h:
  Added macro for reading of 32-bit ints stored in network order from
  unaligned memory location.
include/mysqld_error.h:
  Added error-code for invalid timestamp warning and error-code
  for wrong or unknown time zone specification.
libmysqld/Makefile.am:
  Added main per-thread time zone support file to libmysqld
libmysqld/lib_sql.cc:
  Added initialization of time zones infrastructure to embedded server.
mysql-test/r/connect.result:
  Updated test result since now mysql database contains more
  system tables.
mysql-test/r/date_formats.result:
  Now when truncation occurs during conversion to datetime value we are producing Warnings 
  instead of Notes. Also we are giving more clear warnings about this in some cases.
mysql-test/r/func_sapdb.result:
  New warnings about truncation occured during conversion to datetime value added due
  their better handling.
mysql-test/r/func_time.result:
  New warnings about truncation occured during conversion to datetime value added due
  their better handling.
mysql-test/r/select.result:
  New warnings about truncation occured during conversion to datetime value added due
  their better handling. Also tweaked test a bit to made it less ambigious for reader.
mysql-test/r/system_mysql_db.result:
  Updated test result because new system tables holding time zone descriptions were 
  added.
mysql-test/r/timezone.result:
  Updated timezone.test to use new system variable which shows system time zone.
  Added test of warning which is produced if someone tries to store non-existing (due 
  falling into spring time-gap) datetime value into TIMESTAMP field.
mysql-test/r/type_datetime.result:
  Separated and extended test of values and warnings produced for bad values stored in 
  DATETTIME fields.
mysql-test/r/type_time.result:
  Now we are producing more consistent warning when we are truncating datetime value while
  storing it in TIME field.
mysql-test/r/type_timestamp.result:
  Separated and extended test of values and warnings produced for bad
  values stored in TIMESTAMP fields.
mysql-test/t/select.test:
  Updated test to make it less ambigous for reader.
mysql-test/t/timezone.test:
  Updated timezone.test to use new system variable which shows system time zone.
  Added test of warning which is produced if someone tries to store non-existing (due 
  falling into spring time-gap) datetime value into TIMESTAMP field.
mysql-test/t/type_datetime.test:
  Separated and extended test of values and warnings produced for bad
  values stored in DATETTIME fields.
mysql-test/t/type_timestamp.test:
  Separated and extended test of values and warnings produced for bad
  values stored in TIMESTAMP fields.
scripts/mysql_create_system_tables.sh:
  Added creation of tables with time zone descriptions.
  Also added descriptions of time zones used in tests.
scripts/mysql_fix_privilege_tables.sql:
  Added mysql.time_zone* tables family.
sql/Makefile.am:
  Added files implementing time zone support to server, also added
  rules for building of mysql_tzinfo_to_sql converter and test_time
  test.
sql/field.cc:
  Now we are using per-thread time zone for TIMESTAMP <-> whatever conversion.
  Fixed generation of warnings for datetime types (DATETIME/TIMESTAMP/DATE/...) and
  any other Field to datetime conversion (now we are generating warnings no in lower
  level functions like in str_to_TIME() but in Field methods. This allows generate
  better and more consistent warnings and to reuse code of str_to_TIME() outside of
  server).
  
  Added 3rd parameter to set_warning() method to be able to not increment cut fields
  but still produce a warning. Also added set_datetime_warning() family of auxiliary 
  methods which allow easier generate datetime related warnings.
  Also replaced occurences of current_thd with table->in_use member, added
  asserts for catching all places there we need to set table->in_use
  accordingly. Renamed fix_datetime() function to number_to_TIME() and
  moved it to sql/time.cc there it fits better.
sql/field.h:
  Added comment about places where we can use table->in_use member
  instead of current_thd.
  Added 3rd parameter to Field::set_warning() method and set_datetime_warning()
  family of methods.
sql/field_conv.cc:
  Field::set_warning() method with 2 arguments was replaced with more 
  generic set_warning() method with 3 arguments.
sql/ha_berkeley.cc:
  Now we set table->in_use for temporary tables so we have to use
  table->tmp_table for checking if table is temporary.
sql/item.cc:
  Replaced calls to str_to_time() and str_to_TIME() funcs with their warning
  generating analogs.
sql/item_create.cc:
  Added creation of CONVERT_TZ function as FUNC_ARG3.
sql/item_create.h:
  Added creation of CONVERT_TZ function as FUNC_ARG3.
sql/item_timefunc.cc:
  Added support of per-thread time zone to NOW-like and FROM_UNIXTIME,
  UNIX_TIMESTAMP functions. 
  Added support for CONVERT_TZ function.
  Removed call to str_to_timestamp function which caused non-optimal
  behavior in certain cases. Replaced calls to str_to_time() function 
  with its warning generating analog.
sql/item_timefunc.h:
  Added support of per-thread time zone to NOW-like and
  FROM_UNIXTIME, UNIX_TIMESTAMP functions.
  Added support of CONVERT_TZ function.
sql/lex.h:
  Added support of CONVERT_TZ function.
sql/log.cc:
  Added support for replication of statements depending on time zone.
sql/mysql_priv.h:
  Now including headers with per-thread time zone support functions
  and classes. Added portable replacement of time_t - my_time_t type. 
  Added time zone as one of query distinguishing parameters for
  query cache. 
  Fixed declarations of str_to_TIME, str_to_time and 
  my_system_gmt_sec (former my_gmt_sec) since now they have one more
  out parameter which informs about wrong datetime value or data 
  truncation during conversion.
  Added warning generating version of str_to_TIME() and str_to_time()
  functions.
  Thrown away str_to_datetime/timestamp functions since they are not
  needed any longer. Added number_to_TIME function.
sql/mysqld.cc:
  Added per-thread time zone support initialization.
  Added new startup parameter --default-time-zone.
sql/set_var.cc:
  Added support for per-thread time_zone variable.
  Renamed old timezone variable to system_time_zone.
sql/set_var.h:
  Added support for per-thread time_zone variable.
sql/share/czech/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/danish/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/dutch/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/english/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/estonian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/french/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/german/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/greek/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/hungarian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/italian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/japanese/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/korean/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/norwegian-ny/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/norwegian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/polish/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/portuguese/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/romanian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/russian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/serbian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/slovak/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/spanish/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/swedish/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/share/ukrainian/errmsg.txt:
  Added error message for barking when incorrect time zone name or
  specifiaction is provided and for warning about invalid TIMESTAMP
  values (e.g. falling into the spring time-gap).
sql/slave.cc:
  In order to support replication of statements using time zones in 4.1 we should 
  ensure that both master and slave have same default time zone.
sql/sql_base.cc:
  Now we are setting TABLE::in_use member for all tables (which assume
  calls to Field::store or val_ methods).
sql/sql_cache.cc:
  Added time zone as one more query distinguishing parameter
  for query cache.
sql/sql_class.cc:
  Added THD::time_zone_used variable indicating that this query
  uses per thread time zone.
sql/sql_class.h:
  Added per-thread time zone variable. Added THD::time_zone_used
  variable indicating that this query uses per thread time zone
  so if this is updating query the time zone should be logged to 
  binlog.
sql/sql_insert.cc:
  We should set TABLE::in_use member pointing to thread which is called
  INSERT DELAYED and not to worker thread.
sql/sql_load.cc:
  Field::set_warning() now has one more argument now.
sql/sql_parse.cc:
  Resetting THD::time_zone_used variable in the end of query
  processing.
sql/sql_select.cc:
  Now we are setting TABLE::in_use member for all tables (which assume
  calls to Field::store or val_ methods).
sql/sql_show.cc:
  Now using per thread time zone for extended show tables.
sql/time.cc:
  Added support for per-thread time zones for TIMESTAMP type and
  reworked generation of warnings for TIMESTAMP and DATETIME types.
  (Introduced new TIME_to_timestamp() function. Removed hours 
  normalisation from former my_gmt_sec() since it was not working 
  and not used anywhere now, but breaks parameter constness, added
  to this function generation of warning if we are falling in spring 
  time-gap. Removed str_to_timestamp and str_to_datetime functions 
  which are no longer used. Moved fix_datetime function from
  sql/field.cc to this file as number_to_TIME() function. Added
  out parameter for str_to_TIME and str_to_time functions which
  indicates if value was truncated during conversion, removed direct 
  generation of warnings from this functions.)
sql/unireg.cc:
  Now we are setting TABLE::in_use member for all tables (which assume
    calls to Field::store or val_ methods).
BitKeeper/etc/ignore:
  Added sql/test_time sql/mysql_tzinfo_to_sql libmysqld/tztime.cc to the ignore list

1 files changed, 137 insertions, 0 deletions

diff --git a/sql/tzfile.h b/sql/tzfile.h
new file mode 100644
index 00000000000..623cddc1f12
--- /dev/null
+++ b/sql/tzfile.h
@@ -0,0 +1,137 @@
+/* Copyright (C) 2004 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* 
+   This file is based on public domain code from ftp://elsie.ncih.nist.gov/
+   Initial source code is in the public domain, so clarified as of
+   1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov). 
+*/
+
+/*
+  Information about time zone files.
+*/
+
+#ifndef TZDIR
+#define TZDIR	"/usr/share/zoneinfo" /* Time zone object file directory */
+#endif /* !defined TZDIR */
+
+/*
+  Each file begins with. . .
+*/
+
+#define	TZ_MAGIC	"TZif"
+
+struct tzhead {
+ 	char	tzh_magic[4];		/* TZ_MAGIC */
+	char	tzh_reserved[16];	/* reserved for future use */
+	char	tzh_ttisgmtcnt[4];	/* coded number of trans. time flags */
+	char	tzh_ttisstdcnt[4];	/* coded number of trans. time flags */
+	char	tzh_leapcnt[4];		/* coded number of leap seconds */
+	char	tzh_timecnt[4];		/* coded number of transition times */
+	char	tzh_typecnt[4];		/* coded number of local time types */
+	char	tzh_charcnt[4];		/* coded number of abbr. chars */
+};
+
+/*
+  . . .followed by. . .
+  
+  tzh_timecnt (char [4])s               coded transition times a la time(2)
+  tzh_timecnt (unsigned char)s          types of local time starting at above
+  tzh_typecnt repetitions of
+    one (char [4])                      coded UTC offset in seconds
+    one (unsigned char)                 used to set tm_isdst
+    one (unsigned char)                 that's an abbreviation list index
+  tzh_charcnt (char)s                   '\0'-terminated zone abbreviations
+  tzh_leapcnt repetitions of
+    one (char [4])                      coded leap second transition times
+    one (char [4])                      total correction after above
+  tzh_ttisstdcnt (char)s                indexed by type; if TRUE, transition
+                                        time is standard time, if FALSE,
+                                        transition time is wall clock time
+                                        if absent, transition times are
+                                        assumed to be wall clock time
+  tzh_ttisgmtcnt (char)s                indexed by type; if TRUE, transition
+                                        time is UTC, if FALSE,
+                                        transition time is local time
+                                        if absent, transition times are
+                                        assumed to be local time
+*/
+
+/*
+  In the current implementation, we refuse to deal with files that
+  exceed any of the limits below.
+*/
+
+#ifndef TZ_MAX_TIMES
+/*
+  The TZ_MAX_TIMES value below is enough to handle a bit more than a
+  year's worth of solar time (corrected daily to the nearest second) or
+  138 years of Pacific Presidential Election time
+  (where there are three time zone transitions every fourth year).
+*/
+#define TZ_MAX_TIMES	370
+#endif /* !defined TZ_MAX_TIMES */
+
+#ifndef TZ_MAX_TYPES
+#ifdef SOLAR
+#define TZ_MAX_TYPES	256 /* Limited by what (unsigned char)'s can hold */
+#else
+/*
+  Must be at least 14 for Europe/Riga as of Jan 12 1995,
+  as noted by Earl Chew <earl@hpato.aus.hp.com>.
+*/
+#define TZ_MAX_TYPES	20	/* Maximum number of local time types */
+#endif /* defined SOLAR */
+#endif /* !defined TZ_MAX_TYPES */
+
+#ifndef TZ_MAX_CHARS
+#define TZ_MAX_CHARS	50	/* Maximum number of abbreviation characters */
+				/* (limited by what unsigned chars can hold) */
+#endif /* !defined TZ_MAX_CHARS */
+
+#ifndef TZ_MAX_LEAPS
+#define TZ_MAX_LEAPS	50	/* Maximum number of leap second corrections */
+#endif /* !defined TZ_MAX_LEAPS */
+
+#ifndef TZ_MAX_REV_RANGES
+#ifdef SOLAR
+/* Solar (Asia/RiyadhXX) zones need significantly bigger TZ_MAX_REV_RANGES */
+#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES*2+TZ_MAX_LEAPS*2+2)
+#else
+#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES+TZ_MAX_LEAPS+2)
+#endif
+#endif
+
+#define SECS_PER_MIN	60
+#define MINS_PER_HOUR	60
+#define HOURS_PER_DAY	24
+#define DAYS_PER_WEEK	7
+#define DAYS_PER_NYEAR	365
+#define DAYS_PER_LYEAR	366
+#define SECS_PER_HOUR	(SECS_PER_MIN * MINS_PER_HOUR)
+#define SECS_PER_DAY	((long) SECS_PER_HOUR * HOURS_PER_DAY)
+#define MONS_PER_YEAR	12
+
+#define TM_YEAR_BASE	1900
+
+#define EPOCH_YEAR	1970
+
+/*
+  Accurate only for the past couple of centuries,
+  that will probably do.
+*/
+
+#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))