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Change the comment to a more appropriate one. Discussed with Heikki on IM.

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Approved by:	Heikki
This commit is contained in:
vasil 2007-05-29 12:38:20 +00:00
parent 4971d4de4a
commit 85bd910cb2
1 changed files with 7 additions and 6 deletions
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13
include/dict0mem.h
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@ -158,12 +158,13 @@ struct dict_col_struct{
of an index */
};
/* DICT_MAX_INDEX_COL_LEN is measured in bytes and is the max index column
length + 1. Starting from 4.1.6, we set it to < 3 * 256, so that one can
create a column prefix index on 255 characters of a TEXT field also in the
UTF-8 charset. In that charset, a character may take at most 3 bytes.
This constant MUST NOT BE CHANGED, or the compatibility of InnoDB data files
would be at risk! */
/* DICT_MAX_INDEX_COL_LEN is measured in bytes and is the maximum
indexed column length (or indexed prefix length). It is set to 3*256,
so that one can create a column prefix index on 256 characters of a
TEXT or VARCHAR column also in the UTF-8 charset. In that charset,
a character may take at most 3 bytes.
This constant MUST NOT BE CHANGED, or the compatibility of InnoDB data
files would be at risk! */
#define DICT_MAX_INDEX_COL_LEN 768