我得到一个mysql错误：
#update（ActiveRecord:：StatementInvalid）"Mysql:：Error：#HY000从存储引擎得到错误139：
当试图更新长度为1429个字符的记录上的文本字段时，有什么想法可以解决这个问题吗？
下面是堆叠跑道。
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:147:in `log'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb:299:in `execute'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:167:in `update_sql'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb:314:in `update_sql'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:49:in `update_without_query_dirty'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:19:in `update'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/base.rb:2481:in `update_without_lock'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/locking/optimistic.rb:70:in `update_without_dirty'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/dirty.rb:137:in `update_without_callbacks'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/callbacks.rb:234:in `update_without_timestamps'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/timestamp.rb:38:in `update'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/base.rb:2472:in `create_or_update_without_callbacks'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/callbacks.rb:207:in `create_or_update'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/base.rb:2200:in `save_without_validation'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/validations.rb:901:in `save_without_dirty'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/dirty.rb:75:in `save_without_transactions'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:106:in `save'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:66:in `transaction'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:79:in `transaction'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:98:in `transaction'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:106:in `save'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:118:in `rollback_active_record_state!'
from /var/www/releases/20081002155111/vendor/rails/activerecord/lib/active_record/transactions.rb:106:in `save'
当您说一个文本字段时，它的类型是VARCHAR还是text？
如果是前者，则不能在该列中存储大于255个字符（可能小于UTF-8开销）的字符串。如果是后者，你最好发布你的模式定义，这样人们可以进一步帮助你。
也许是这个错误：#1030-从存储引擎中得到错误139，但如果您直接在错误消息之后发布查询，会有所帮助。
这似乎是一个非常奇怪的mysql错误，文本被截断为256个字符（对于文本类型），而抛出的上述错误是字符串为1000个字符或更多。将表列再次修改为文本解决了问题，或者它只是自己解决了问题。。我还是不确定。
更新：将表类型更改为MyISAM解决了这个问题