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-rwxr-xr-xactiverecord/lib/active_record/connection_adapters/mysql_adapter.rb17
1 files changed, 17 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index c37bfd3e81..6432c3cfee 100755
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -112,6 +112,23 @@ module ActiveRecord
super
end
+ def extract_limit(sql_type)
+ if sql_type =~ /blob|text/i
+ case sql_type
+ when /tiny/i
+ 255
+ when /medium/i
+ 16777215
+ when /long/i
+ 2147483647 # mysql only allows 2^31-1, not 2^32-1, somewhat inconsistently with the tiny/medium/normal cases
+ else
+ super # we could return 65535 here, but we leave it undecorated by default
+ end
+ else
+ super
+ end
+ end
+
# MySQL misreports NOT NULL column default when none is given.
# We can't detect this for columns which may have a legitimate ''
# default (string) but we can for others (integer, datetime, boolean,