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5a759d31f7
Benefits of this patch: - Removed a lot of calls to strlen(), especially for field_string - Strings generated by parser are now const strings, less chance of accidently changing a string - Removed a lot of calls with LEX_STRING as parameter (changed to pointer) - More uniform code - Item::name_length was not kept up to date. Now fixed - Several bugs found and fixed (Access to null pointers, access of freed memory, wrong arguments to printf like functions) - Removed a lot of casts from (const char*) to (char*) Changes: - This caused some ABI changes - lex_string_set now uses LEX_CSTRING - Some fucntions are now taking const char* instead of char* - Create_field::change and after changed to LEX_CSTRING - handler::connect_string, comment and engine_name() changed to LEX_CSTRING - Checked printf() related calls to find bugs. Found and fixed several errors in old code. - A lot of changes from LEX_STRING to LEX_CSTRING, especially related to parsing and events. - Some changes from LEX_STRING and LEX_STRING & to LEX_CSTRING* - Some changes for char* to const char* - Added printf argument checking for my_snprintf() - Introduced null_clex_str, star_clex_string, temp_lex_str to simplify code - Added item_empty_name and item_used_name to be able to distingush between items that was given an empty name and items that was not given a name This is used in sql_yacc.yy to know when to give an item a name. - select table_name."*' is not anymore same as table_name.* - removed not used function Item::rename() - Added comparision of item->name_length before some calls to my_strcasecmp() to speed up comparison - Moved Item_sp_variable::make_field() from item.h to item.cc - Some minimal code changes to avoid copying to const char * - Fixed wrong error message in wsrep_mysql_parse() - Fixed wrong code in find_field_in_natural_join() where real_item() was set when it shouldn't - ER_ERROR_ON_RENAME was used with extra arguments. - Removed some (wrong) ER_OUTOFMEMORY, as alloc_root will already give the error. TODO: - Check possible unsafe casts in plugin/auth_examples/qa_auth_interface.c - Change code to not modify LEX_CSTRING for database name (as part of lower_case_table_names)
236 lines
10 KiB
C
236 lines
10 KiB
C
/* Copyright (c) 2006, 2010, Oracle and/or its affiliates.
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Copyright (c) 2011, 2016, MariaDB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_TIME_INCLUDED
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#define SQL_TIME_INCLUDED
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#include "my_global.h" /* ulong */
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#include "my_time.h"
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#include "mysql_time.h" /* timestamp_type */
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#include "sql_error.h" /* Sql_condition */
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#include "structs.h" /* INTERVAL */
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typedef enum enum_mysql_timestamp_type timestamp_type;
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typedef struct st_date_time_format DATE_TIME_FORMAT;
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typedef struct st_known_date_time_format KNOWN_DATE_TIME_FORMAT;
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/* Flags for calc_week() function. */
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#define WEEK_MONDAY_FIRST 1
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#define WEEK_YEAR 2
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#define WEEK_FIRST_WEEKDAY 4
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ulong convert_period_to_month(ulong period);
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ulong convert_month_to_period(ulong month);
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void set_current_date(THD *thd, MYSQL_TIME *to);
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bool time_to_datetime(MYSQL_TIME *ltime);
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void time_to_daytime_interval(MYSQL_TIME *l_time);
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bool get_date_from_daynr(long daynr,uint *year, uint *month, uint *day);
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my_time_t TIME_to_timestamp(THD *thd, const MYSQL_TIME *t, uint *error_code);
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bool str_to_datetime_with_warn(CHARSET_INFO *cs, const char *str,
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uint length, MYSQL_TIME *l_time,
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ulonglong flags);
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bool double_to_datetime_with_warn(double value, MYSQL_TIME *ltime,
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ulonglong fuzzydate,
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const char *name);
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bool decimal_to_datetime_with_warn(const my_decimal *value, MYSQL_TIME *ltime,
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ulonglong fuzzydate,
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const char *name);
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bool int_to_datetime_with_warn(bool neg, ulonglong value, MYSQL_TIME *ltime,
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ulonglong fuzzydate,
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const char *name);
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bool time_to_datetime(THD *thd, const MYSQL_TIME *tm, MYSQL_TIME *dt);
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bool time_to_datetime_with_warn(THD *thd,
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const MYSQL_TIME *tm, MYSQL_TIME *dt,
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ulonglong fuzzydate);
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/*
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Simply truncate the YYYY-MM-DD part to 0000-00-00
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and change time_type to MYSQL_TIMESTAMP_TIME
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*/
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inline void datetime_to_time(MYSQL_TIME *ltime)
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{
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DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
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ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
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DBUG_ASSERT(ltime->neg == 0);
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ltime->year= ltime->month= ltime->day= 0;
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ltime->time_type= MYSQL_TIMESTAMP_TIME;
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}
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/**
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Convert DATE/DATETIME to TIME(dec)
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using CURRENT_DATE in a non-old mode,
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or using simple truncation in old mode (OLD_MODE_ZERO_DATE_TIME_CAST).
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@param thd - the thread to get the variables.old_behaviour value from
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@param dt - the DATE of DATETIME value to convert
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@param[out] tm - store result here
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@param dec - the desired scale. The fractional part of the result
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is checked according to this parameter before returning
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the conversion result. "dec" is important in the corner
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cases near the max/min limits.
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If the result is '838:59:59.999999' and the desired scale
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is less than 6, an error is returned.
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Note, dec is not important in the
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OLD_MODE_ZERO_DATE_TIME_CAST old mode.
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- in case of OLD_MODE_ZERO_DATE_TIME_CAST
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the TIME part is simply truncated and "false" is returned.
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- otherwise, the result is calculated effectively similar to:
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TIMEDIFF(dt, CAST(CURRENT_DATE AS DATETIME))
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If the difference fits into the supported TIME range, "false" is returned,
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otherwise a warning is issued and "true" is returned.
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@return false - on success
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@return true - on error
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*/
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bool datetime_to_time_with_warn(THD *, const MYSQL_TIME *dt,
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MYSQL_TIME *tm, uint dec);
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inline void datetime_to_date(MYSQL_TIME *ltime)
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{
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DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
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ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
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DBUG_ASSERT(ltime->neg == 0);
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ltime->hour= ltime->minute= ltime->second= ltime->second_part= 0;
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ltime->time_type= MYSQL_TIMESTAMP_DATE;
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}
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inline void date_to_datetime(MYSQL_TIME *ltime)
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{
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DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
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ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
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DBUG_ASSERT(ltime->neg == 0);
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ltime->time_type= MYSQL_TIMESTAMP_DATETIME;
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}
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void make_truncated_value_warning(THD *thd,
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Sql_condition::enum_warning_level level,
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const ErrConv *str_val,
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timestamp_type time_type,
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const char *field_name);
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static inline void make_truncated_value_warning(THD *thd,
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Sql_condition::enum_warning_level level, const char *str_val,
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uint str_length, timestamp_type time_type,
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const char *field_name)
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{
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const ErrConvString str(str_val, str_length, &my_charset_bin);
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make_truncated_value_warning(thd, level, &str, time_type, field_name);
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}
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extern DATE_TIME_FORMAT *date_time_format_make(timestamp_type format_type,
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const char *format_str,
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uint format_length);
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extern DATE_TIME_FORMAT *date_time_format_copy(THD *thd,
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DATE_TIME_FORMAT *format);
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const char *get_date_time_format_str(KNOWN_DATE_TIME_FORMAT *format,
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timestamp_type type);
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bool my_TIME_to_str(const MYSQL_TIME *ltime, String *str, uint dec);
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/* MYSQL_TIME operations */
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bool date_add_interval(MYSQL_TIME *ltime, interval_type int_type,
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INTERVAL interval);
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bool calc_time_diff(const MYSQL_TIME *l_time1, const MYSQL_TIME *l_time2,
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int l_sign, longlong *seconds_out, long *microseconds_out);
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/**
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Calculate time difference between two MYSQL_TIME values and
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store the result as an out MYSQL_TIME value in MYSQL_TIMESTAMP_TIME format.
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The result can be outside of the supported TIME range.
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For example, calc_time_diff('2002-01-01 00:00:00', '2001-01-01 00:00:00')
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returns '8760:00:00'. So the caller might want to do check_time_range() or
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adjust_time_range_with_warn() on the result of a calc_time_diff() call.
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@param l_time1 - the minuend (TIME/DATE/DATETIME value)
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@param l_time2 - the subtrahend TIME/DATE/DATETIME value
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@param l_sign - +1 if absolute values are to be subtracted,
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or -1 if absolute values are to be added.
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@param[out] l_time3 - the result
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@param fuzzydate - flags
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@return true - if TIME_NO_ZERO_DATE was passed in flags and
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the result appeared to be '00:00:00.000000'.
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This is important when calc_time_diff() is called
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when calculating DATE_ADD(TIMEDIFF(...),...)
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@return false - otherwise
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*/
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bool calc_time_diff(const MYSQL_TIME *l_time1, const MYSQL_TIME *l_time2,
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int lsign, MYSQL_TIME *l_time3, ulonglong fuzzydate);
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int my_time_compare(const MYSQL_TIME *a, const MYSQL_TIME *b);
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void localtime_to_TIME(MYSQL_TIME *to, struct tm *from);
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void calc_time_from_sec(MYSQL_TIME *to, long seconds, long microseconds);
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uint calc_week(MYSQL_TIME *l_time, uint week_behaviour, uint *year);
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int calc_weekday(long daynr,bool sunday_first_day_of_week);
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bool parse_date_time_format(timestamp_type format_type,
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const char *format, uint format_length,
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DATE_TIME_FORMAT *date_time_format);
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/* Character set-aware version of str_to_time() */
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bool str_to_time(CHARSET_INFO *cs, const char *str,uint length,
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MYSQL_TIME *l_time, ulonglong fuzzydate,
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MYSQL_TIME_STATUS *status);
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/* Character set-aware version of str_to_datetime() */
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bool str_to_datetime(CHARSET_INFO *cs,
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const char *str, uint length,
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MYSQL_TIME *l_time, ulonglong flags,
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MYSQL_TIME_STATUS *status);
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/* convenience wrapper */
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inline bool parse_date_time_format(timestamp_type format_type,
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DATE_TIME_FORMAT *date_time_format)
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{
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return parse_date_time_format(format_type,
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date_time_format->format.str,
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date_time_format->format.length,
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date_time_format);
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}
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extern DATE_TIME_FORMAT global_date_format;
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extern DATE_TIME_FORMAT global_datetime_format;
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extern DATE_TIME_FORMAT global_time_format;
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extern KNOWN_DATE_TIME_FORMAT known_date_time_formats[];
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extern LEX_CSTRING interval_type_to_name[];
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static inline bool
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non_zero_hhmmssuu(const MYSQL_TIME *ltime)
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{
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return ltime->hour || ltime->minute || ltime->second || ltime->second_part;
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}
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static inline bool
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non_zero_YYMMDD(const MYSQL_TIME *ltime)
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{
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return ltime->year || ltime->month || ltime->day;
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}
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static inline bool
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non_zero_date(const MYSQL_TIME *ltime)
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{
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return non_zero_YYMMDD(ltime) ||
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(ltime->time_type == MYSQL_TIMESTAMP_DATETIME &&
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non_zero_hhmmssuu(ltime));
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}
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static inline bool
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check_date(const MYSQL_TIME *ltime, ulonglong flags, int *was_cut)
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{
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return check_date(ltime, non_zero_date(ltime), flags, was_cut);
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}
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bool check_date_with_warn(const MYSQL_TIME *ltime, ulonglong fuzzy_date,
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timestamp_type ts_type);
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bool make_date_with_warn(MYSQL_TIME *ltime,
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ulonglong fuzzy_date, timestamp_type ts_type);
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bool adjust_time_range_with_warn(MYSQL_TIME *ltime, uint dec);
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#endif /* SQL_TIME_INCLUDED */
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