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MDEV-307 Add functionality for database comments

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This commit adds a new feature to the server to add comments at the database
level. 1024 bytes is the maximum comment length allowed. If the comment length
exceeds this limit, a new error/warning code 4144 is thrown, based on whether
thd->is_strict_mode() is true/false. The database comment is also added to the
db.opt file, as well as to the information_schema.schemata table.
This commit is contained in:
Gagan Goel
2018-08-26 00:25:52 -04:00
committed by Robert Bindar
parent 9a8d1d84f8
commit e9c6d5a1e8
12 changed files with 277 additions and 47 deletions
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3
sql/handler.h
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@ -1945,11 +1945,12 @@ enum enum_stats_auto_recalc { HA_STATS_AUTO_RECALC_DEFAULT= 0,
It stores the "schema_specification" part of the CREATE/ALTER statements and
is passed to mysql_create_db() and mysql_alter_db().
Currently consists only of the schema default character set and collation.
Currently consists of the schema default character set, collation and schema_comment.
*/
struct Schema_specification_st
{
CHARSET_INFO *default_table_charset;
LEX_CSTRING *schema_comment;
void init()
{
bzero(this, sizeof(*this));