diff options
| author | Sergei Golubchik <serg@mariadb.org> | 2017-10-22 13:03:41 +0200 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2017-10-22 13:03:41 +0200 |
| commit | 9d2e2d753323a934604d25144b9d1ecaf34b47d8 (patch) | |
| tree | 051a721f7ea77c2278d09323e36088abe22aa66a /sql/sql_const.h | |
| parent | d11af09865299033d5eef64531704f6ab8af5304 (diff) | |
| parent | 2eb3c5e5420a724945a4cba914df25aa1e3744ce (diff) | |
| download | mariadb-git-9d2e2d753323a934604d25144b9d1ecaf34b47d8.tar.gz | |
Merge branch '10.0' into 10.1
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 3e23fc25bef..946cf13e2ae 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* */ |