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a2066982f1
used In a simple queries a result of the GROUP_CONCAT() function was always of varchar type. But if length of GROUP_CONCAT() result is greater than 512 chars and temporary table is used during select then the result is converted to blob, due to policy to not to store fields longer than 512 chars in tmp table as varchar fields. In order to provide consistent behaviour, result of GROUP_CONCAT() now will always be converted to blob if it is longer than 512 chars. Item_func_group_concat::field_type() is modified accordingly. mysql-test/t/func_gconcat.test: Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used mysql-test/r/func_gconcat.result: Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used sql/unireg.h: Added the CONVERT_IF_BIGGER_TO_BLOB constant sql/sql_select.cc: Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used The unnamed constant 255 in the create_tmp_field() and create_tmp_field_from_item() functions now defined as the CONVERT_IF_BIGGER_TO_BLOB constant. The create_tmp_field() function now converts the Item_sum string result to a blob field based on its char length. sql/item_sum.h: Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used To the Item_func_group_concat calls added the member function field_type() which returns the BLOB or VAR_STRING type based on the items length. sql/item_func.cc: Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used In the Item_func::tmp_table_field() function the unnamed constant 255 is changed to the CONVERT_IF_BIGGER_TO_BLOB constant. The Item_func::tmp_table_field() function now measures the result length in chars rather than bytes when converting string result to a blob.
173 lines
6.7 KiB
C
173 lines
6.7 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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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; either version 2 of the License, or
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(at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Extra functions used by unireg library */
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#ifndef _unireg_h
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#ifndef NO_ALARM_LOOP
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#define NO_ALARM_LOOP /* lib5 and popen can't use alarm */
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#endif
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/* These paths are converted to other systems (WIN95) before use */
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#define LANGUAGE "english/"
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#define ERRMSG_FILE "errmsg.sys"
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#define TEMP_PREFIX "MY"
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#define LOG_PREFIX "ML"
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#define PROGDIR "bin/"
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#ifndef DATADIR
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#define DATADIR "data/"
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#endif
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#ifndef SHAREDIR
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#define SHAREDIR "share/"
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#endif
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#define ER(X) errmesg[(X)-1000]
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#define ER_SAFE(X) (((X) >= 1000 && (X) < ER_ERROR_MESSAGES + 1000) ? ER(X) : "Invalid error code")
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#define ERRMAPP 1 /* Errormap f|r my_error */
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#define LIBLEN FN_REFLEN-FN_LEN /* Max l{ngd p} dev */
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#define MAX_DBKEY_LENGTH (FN_LEN*2+1+1+4+4) /* extra 4+4 bytes for slave tmp
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* tables */
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#define MAX_ALIAS_NAME 256
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#define MAX_FIELD_NAME 34 /* Max colum name length +2 */
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#define MAX_SYS_VAR_LENGTH 32
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#define MAX_KEY 64 /* Max used keys */
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#define MAX_REF_PARTS 16 /* Max parts used as ref */
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#define MAX_KEY_LENGTH 1024 /* max possible key */
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#if SIZEOF_OFF_T > 4
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#define MAX_REFLENGTH 8 /* Max length for record ref */
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#else
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#define MAX_REFLENGTH 4 /* Max length for record ref */
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#endif
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#define MAX_HOSTNAME 61 /* len+1 in mysql.user */
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#define MAX_MBWIDTH 3 /* Max multibyte sequence */
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#define MAX_FIELD_CHARLENGTH 255
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#define CONVERT_IF_BIGGER_TO_BLOB 255
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/* Max column width +1 */
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#define MAX_FIELD_WIDTH (MAX_FIELD_CHARLENGTH*MAX_MBWIDTH+1)
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#define MAX_DATE_WIDTH 10 /* YYYY-MM-DD */
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#define MAX_TIME_WIDTH 23 /* -DDDDDD HH:MM:SS.###### */
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#define MAX_DATETIME_FULL_WIDTH 29 /* YYYY-MM-DD HH:MM:SS.###### AM */
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#define MAX_DATETIME_WIDTH 19 /* YYYY-MM-DD HH:MM:SS */
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#define MAX_TABLES (sizeof(table_map)*8-3) /* Max tables in join */
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#define PARAM_TABLE_BIT (((table_map) 1) << (sizeof(table_map)*8-3))
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#define OUTER_REF_TABLE_BIT (((table_map) 1) << (sizeof(table_map)*8-2))
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#define RAND_TABLE_BIT (((table_map) 1) << (sizeof(table_map)*8-1))
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#define PSEUDO_TABLE_BITS (PARAM_TABLE_BIT | OUTER_REF_TABLE_BIT | \
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RAND_TABLE_BIT)
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#define MAX_FIELDS 4096 /* Limit in the .frm file */
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#define MAX_SORT_MEMORY (2048*1024-MALLOC_OVERHEAD)
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#define MIN_SORT_MEMORY (32*1024-MALLOC_OVERHEAD)
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/* Memory allocated when parsing a statement / saving a statement */
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#define MEM_ROOT_BLOCK_SIZE 8192
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#define MEM_ROOT_PREALLOC 8192
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#define TRANS_MEM_ROOT_BLOCK_SIZE 4096
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#define TRANS_MEM_ROOT_PREALLOC 4096
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#define DEFAULT_ERROR_COUNT 64
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#define EXTRA_RECORDS 10 /* Extra records in sort */
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#define SCROLL_EXTRA 5 /* Extra scroll-rows. */
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#define FIELD_NAME_USED ((uint) 32768) /* Bit set if fieldname used */
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#define FORM_NAME_USED ((uint) 16384) /* Bit set if formname used */
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#define FIELD_NR_MASK 16383 /* To get fieldnumber */
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#define FERR -1 /* Error from my_functions */
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#define CREATE_MODE 0 /* Default mode on new files */
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#define NAMES_SEP_CHAR '\377' /* Char to sep. names */
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#define READ_RECORD_BUFFER (uint) (IO_SIZE*8) /* Pointer_buffer_size */
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#define DISK_BUFFER_SIZE (uint) (IO_SIZE*16) /* Size of diskbuffer */
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#define POSTFIX_ERROR DBL_MAX
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#define ME_INFO (ME_HOLDTANG+ME_OLDWIN+ME_NOREFRESH)
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#define ME_ERROR (ME_BELL+ME_OLDWIN+ME_NOREFRESH)
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#define MYF_RW MYF(MY_WME+MY_NABP) /* Vid my_read & my_write */
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#define SPECIAL_USE_LOCKS 1 /* Lock used databases */
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#define SPECIAL_NO_NEW_FUNC 2 /* Skip new functions */
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#define SPECIAL_SKIP_SHOW_DB 4 /* Don't allow 'show db' */
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#define SPECIAL_WAIT_IF_LOCKED 8 /* Wait if locked database */
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#define SPECIAL_SAME_DB_NAME 16 /* form name = file name */
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#define SPECIAL_ENGLISH 32 /* English error messages */
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#define SPECIAL_NO_RESOLVE 64 /* Don't use gethostname */
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#define SPECIAL_NO_PRIOR 128 /* Don't prioritize threads */
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#define SPECIAL_BIG_SELECTS 256 /* Don't use heap tables */
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#define SPECIAL_NO_HOST_CACHE 512 /* Don't cache hosts */
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#define SPECIAL_SHORT_LOG_FORMAT 1024
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#define SPECIAL_SAFE_MODE 2048
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#define SPECIAL_LOG_QUERIES_NOT_USING_INDEXES 4096 /* Log q not using indexes */
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/* Extern defines */
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#define store_record(A,B) bmove_align((A)->B,(A)->record[0],(size_t) (A)->reclength)
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#define restore_record(A,B) bmove_align((A)->record[0],(A)->B,(size_t) (A)->reclength)
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#define cmp_record(A,B) memcmp((A)->record[0],(A)->B,(size_t) (A)->reclength)
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#define empty_record(A) { \
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restore_record((A),default_values); \
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bfill((A)->null_flags,(A)->null_bytes,255);\
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}
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/* Defines for use with openfrm, openprt and openfrd */
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#define READ_ALL 1 /* openfrm: Read all parameters */
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#define CHANGE_FRM 2 /* openfrm: open .frm as O_RDWR */
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#define READ_KEYINFO 4 /* L{s nyckeldata fr}n filen */
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#define EXTRA_RECORD 8 /* Reservera plats f|r extra record */
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#define DONT_OPEN_TABLES 8 /* Don't open database-files (frd) */
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#define DONT_OPEN_MASTER_REG 16 /* Don't open first reg-file (prt) */
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#define EXTRA_LONG_RECORD 16 /* Plats f|r dubbel s|k-record */
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#define COMPUTE_TYPES 32 /* Kontrollera type f|r f{ltena */
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#define SEARCH_PRG 64 /* S|k efter registret i 'prg_dev' */
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#define READ_USED_NAMES 128 /* L{s anv{nda formul{rnamn */
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#define DONT_GIVE_ERROR 256 /* Don't do frm_error on openfrm */
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#define READ_SCREENS 1024 /* Read screens, info and helpfile */
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#define DELAYED_OPEN 4096 /* Open table later */
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#define SC_INFO_LENGTH 4 /* Form format constant */
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#define TE_INFO_LENGTH 3
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#define MTYP_NOEMPTY_BIT 128
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/*
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Minimum length pattern before Turbo Boyer-Moore is used
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for SELECT "text" LIKE "%pattern%", excluding the two
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wildcards in class Item_func_like.
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*/
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#define MIN_TURBOBM_PATTERN_LEN 3
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/*
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Defines for binary logging.
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Do not decrease the value of BIN_LOG_HEADER_SIZE.
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Do not even increase it before checking code.
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*/
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#define BIN_LOG_HEADER_SIZE 4
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#define FLOATING_POINT_BUFFER 331
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#define DEFAULT_KEY_CACHE_NAME "default"
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/* Include prototypes for unireg */
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#include "mysqld_error.h"
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#include "structs.h" /* All structs we need */
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#endif
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