diff options
Diffstat (limited to 'sql/sql_const.h')
| -rw-r--r-- | sql/sql_const.h | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/sql/sql_const.h b/sql/sql_const.h index c3b03dd7848..463915732ef 100644 --- a/sql/sql_const.h +++ b/sql/sql_const.h @@ -17,12 +17,14 @@ @file File containing constants that can be used throughout the server. - @note This file shall not contain any includes of any kinds. + @note This file shall not contain or include any declarations of any kinds. */ #ifndef SQL_CONST_INCLUDED #define SQL_CONST_INCLUDED +#include <mysql_version.h> + #define LIBLEN FN_REFLEN-FN_LEN /* Max l{ngd p} dev */ /* extra 4+4 bytes for slave tmp tables */ #define MAX_DBKEY_LENGTH (NAME_LEN*2+1+1+4+4) @@ -31,15 +33,27 @@ #define MAX_SYS_VAR_LENGTH 32 #define MAX_KEY MAX_INDEXES /* Max used keys */ #define MAX_REF_PARTS 32 /* Max parts used as ref */ -#define MAX_KEY_LENGTH 3072 /* max possible key */ + +/* + Maximum length of the data part of an index lookup key. + + The "data part" is defined as the value itself, not including the + NULL-indicator bytes or varchar length bytes ("the Extras"). We need this + value because there was a bug where length of the Extras were not counted. + + You probably need MAX_KEY_LENGTH, not this constant. +*/ +#define MAX_DATA_LENGTH_FOR_KEY 3072 #if SIZEOF_OFF_T > 4 #define MAX_REFLENGTH 8 /* Max length for record ref */ #else #define MAX_REFLENGTH 4 /* Max length for record ref */ #endif #define MAX_HOSTNAME 61 /* len+1 in mysql.user */ +#define MAX_CONNECTION_NAME NAME_LEN #define MAX_MBWIDTH 3 /* Max multibyte sequence */ +#define MAX_FILENAME_MBWIDTH 5 #define MAX_FIELD_CHARLENGTH 255 /* In MAX_FIELD_VARCHARLENGTH we reserve extra bytes for the overhead: @@ -78,7 +92,7 @@ RAND_TABLE_BIT) #define CONNECT_STRING_MAXLEN 65535 /* stored in 2 bytes in .frm */ #define MAX_FIELDS 4096 /* Limit in the .frm file */ -#define MAX_PARTITIONS 1024 +#define MAX_PARTITIONS 8192 #define MAX_SELECT_NESTING (sizeof(nesting_map)*8-1) @@ -87,7 +101,6 @@ /* Some portable defines */ -#define portable_sizeof_char_ptr 8 #define STRING_BUFFER_USUAL_SIZE 80 /* Memory allocated when parsing a statement / saving a statement */ @@ -139,6 +152,13 @@ */ #define TABLE_DEF_CACHE_MIN 400 +/** + Maximum number of connections default value. + 151 is larger than Apache's default max children, + to avoid "too many connections" error in a common setup. +*/ +#define MAX_CONNECTIONS_DEFAULT 151 + /* Stack reservation. Feel free to raise this by the smallest amount you can to get the @@ -146,7 +166,7 @@ */ #define STACK_MIN_SIZE 16000 // Abort if less stack during eval. -#define STACK_MIN_SIZE_FOR_OPEN 1024*80 +#define STACK_MIN_SIZE_FOR_OPEN (1024*80) #define STACK_BUFF_ALLOC 352 ///< For stack overrun checks #ifndef MYSQLD_NET_RETRY_COUNT #define MYSQLD_NET_RETRY_COUNT 10 ///< Abort read after this many int. @@ -250,8 +270,8 @@ #define DEFAULT_CONCURRENCY 10 #define DELAYED_LIMIT 100 /**< pause after xxx inserts */ #define DELAYED_QUEUE_SIZE 1000 -#define DELAYED_WAIT_TIMEOUT 5*60 /**< Wait for delayed insert */ -#define MAX_CONNECT_ERRORS 10 ///< errors before disabling host +#define DELAYED_WAIT_TIMEOUT (5*60) /**< Wait for delayed insert */ +#define MAX_CONNECT_ERRORS 100 ///< errors before disabling host #define LONG_TIMEOUT ((ulong) 3600L*24L*365L) |