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| author | Alexander Barkov <bar@mariadb.org> | 2017-10-30 16:42:46 +0400 |
|---|---|---|
| committer | Alexander Barkov <bar@mariadb.org> | 2017-10-30 16:42:46 +0400 |
| commit | 003cb2f42477772ae43228c0bc0f8492246b9340 (patch) | |
| tree | 680314d232d55b5a41dc2b2f5b500677e4aff183 /sql/sql_const.h | |
| parent | 84ed288f6807a4602e0af8615bfb17080df15160 (diff) | |
| parent | 58e0dcb93dc2b2bf49f76c754bd216dbdf875a0d (diff) | |
| download | mariadb-git-003cb2f42477772ae43228c0bc0f8492246b9340.tar.gz | |
Merge remote-tracking branch 'origin/10.2' into bb-10.2-ext
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 8d5f56de6b0..a5756aa1f39 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* */ |