Similarly, you can convert complex queries used in your application into view objects. In the following section, you learn how to create, update and delete view objects in your MySQL database.Create a SQL View To create a new view object, you use the CREATE VIEW statement followed by the ...
set_can_use_prefix_key() : Item, Item_field set_cannot_rollback() : binlog_trx_cache_data set_capacity() : dd::cache::Shared_multi_map< T >, Result_set_capacity, Statement_handle set_cardinality() : dd::Index_stat, dd::Index_stat_impl set_cargo_type() : Gcs_internal_message_...
Description: I can't use some function in the VIEW. Ex: ENCRYPT, SUBSTRING_INDEX How to repeat: mysql> CREATE TABLE `t` (`a` VARCHAR(8)); mysql> INSERT INTO `t` VALUES("aaa"); mysql> CREATE VIEW `v` AS SELECT ENCRYPT(`a`) FROM `t`; mysql> SELECT * FROM `v`; ERROR 1304...
Replication from MySQL 5.7 to 8.0 of statements that refer to these removed features can cause replication failure. Applications that use any of the removed features should be revised to avoid them and use alternatives when possible, as described in Features Removed in MySQL 8.0. To avoid a st...
Description: After upgrading to 5.5.20 some of my users that have only global SELECT grants were getting an error message when running an explain on a view: ERROR 1345 (HY000): EXPLAIN/SHOW can not be issued; lacking privileges for underlying table As stated previously, the user has SELECT...
When you do not specify a definer of the view, it is created with definer "username@%". The part after the @ sign means that it is for remote connections, which are disabled for this user. To create the view, you may use the following code: ...
bool is_connected (bool use_cached_connection_alive=false) final Return false if connection to client is broken. More... uint get_protocol_rw_status () Return the cached protocol rw status. More... void fatal_error () Mark the current error as fatal...
1044 Can not use this command here ! 不支持的MySQL协议命令,请确认。 1045 其他语句执行异常 请联系技术支持。 1046 No database specified in FROM table 查询未能找到目标表的归属DB,请检查数据库连接使用的DB,或者直接为目标表前面加上DB前缀。 1143 Access deny for accessing database ‘schema’ from th...
id=5275view支持可以把子查询提升到上层查询中。优化器会调用SELECT_LEX::resolve_placeholder_tables -> SELECT_LEX::merge_derived来避免materialize那些可以提升到上层查询的子查询。外部也可以通过set optimizer_switch=’derived_merge=on/off’来进行开关,下面来对比下8.0.13和8.0.18对于该优化的执行计划展现。
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