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| author | Sergei Golubchik <serg@mariadb.org> | 2017-10-18 15:14:39 +0200 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2017-10-18 15:14:39 +0200 |
| commit | da4503e956ee067947e504c6e73052d9d906742c (patch) | |
| tree | a70bbc33f0411ef29c347a570d8253445d8013e4 /sql/sql_const.h | |
| parent | babbf8c6fc6da92cd1b2bb23f04e996f84b0ca1a (diff) | |
| parent | b000e169562697aa072600695d4f0c0412f94f4f (diff) | |
| download | mariadb-git-da4503e956ee067947e504c6e73052d9d906742c.tar.gz | |
Merge branch '5.5' into 10.0
Diffstat (limited to 'sql/sql_const.h')
| -rw-r--r-- | sql/sql_const.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sql/sql_const.h b/sql/sql_const.h index da2eef1b441..c37d8dd68f7 100644 --- a/sql/sql_const.h +++ b/sql/sql_const.h @@ -45,7 +45,18 @@ #define MAX_MBWIDTH 3 /* Max multibyte sequence */ #define MAX_FILENAME_MBWIDTH 5 #define MAX_FIELD_CHARLENGTH 255 -#define MAX_FIELD_VARCHARLENGTH 65535 +/* + In MAX_FIELD_VARCHARLENGTH we reserve extra bytes for the overhead: + - 2 bytes for the length + - 1 byte for NULL bits + to avoid the "Row size too large" error for these three corner definitions: + CREATE TABLE t1 (c VARBINARY(65533)); + CREATE TABLE t1 (c VARBINARY(65534)); + CREATE TABLE t1 (c VARBINARY(65535)); + Like VARCHAR(65536), they will be converted to BLOB automatically + in non-sctict mode. +*/ +#define MAX_FIELD_VARCHARLENGTH (65535-2-1) #define MAX_FIELD_BLOBLENGTH UINT_MAX32 /* cf field_blob::get_length() */ #define CONVERT_IF_BIGGER_TO_BLOB 512 /* Threshold *in characters* */ |