If we verify the schemas tab, we will not find the testdb_copy database on the list anymore. Since the database testdb_copy is an empty database, the number of affected rows is zero. Once we click the execute button, MySQL will return the below message indicating that the database is dropped successfully. The below screen explains it more clearly: Once we sure, click the Execute button to execute the statement. If we want the safe deletion of the database, it is required to choose the Review SQL option. And if we choose Drop Now option, the database will be deleted permanently. If we select Review SQL, it will produce the SQL statement that will be executed. When we click the Drop Schema option, MySQL Workbench displays a dialog box to confirm the deletion process. If we want to delete a database, right-click the database that you want to remove, for example, testdb_copy under the Schema menu and select Drop Schema option, as shown in the following screen. Here, we can see all the previously created databases. Go to the Navigation tab and click on the Schema menu. Now do the following steps for database deletion:ġ.
#Mysql drop password#
To drop a database using this tool, we first need to launch the MySQL Workbench and log in with the username and password to the MySQL server. We must have to use proper names while giving any SQL command. Note: All the database names, table names, and table field names are case sensitive. Alternatively, MySQL also allows to drop indexes using the ALTER TABLE command. It will look like this:įrom the above, we can see that the database "mytestdb_copy" is removed successfully. To drop a non-primary key index, use the DROP INDEX command: DROP INDEX. See this other question.Now we can verify that either our database is removed or not by executing the following query. I just used the value of the server system variable max_allowed_packet, but usually is fine any big integer number.
Because the default is 1024, we need to increase it to avoid a truncated result if we have a lot of triggers. The server system variable group_concat_max_len is the maximum permitted result length in bytes for the GROUP_CONCAT() function. The result of the previous query will produce something like: DROP TRIGGER IF EXISTS `trigger1` Īnd you can use these SQL statements to finally delete all the triggers. SELECT CONCAT('DROP TRIGGER IF EXISTS `', TRIGGER_NAME, '` ') AS sql_string,'1'įROM information_schema.TRIGGERS WHERE TRIGGER_SCHEMA = '' SELECT GROUP_CONCAT(sql_string SEPARATOR '\n') SET = select all the triggers and build the `DROP TRIGGER` SQL your database name): - set `group_concat_max_len`
#Mysql drop code#
It is not possible to delete all the triggers in a MySQL database using one SQL statement.īut with the following SQL code you can build the list of all the 'DROP TRIGGER' statements ( replace with your schema name, e.g. They both reach the same conclusion that even using a stored procedure will not help.
#Mysql drop how to#
How to drop trigger in store procedure?.There are two threads about this on the MySQL forums: First do a SELECT CONCAT ('DROP TABLE ', TABLESCHEMA, '.', TABLENAME, ' ') FROM INFORMATIONSCHEMA.TABLES WHERE TABLENAME LIKE '\elgg' AND TABLESCHEMA 'yourdatabasename' and check if this returns the correct statements for every table. I'm guessing this happens because a variable can only hold a string and drop trigger requires a trigger name (not a string containing a trigger name): create procedure drop_a_trigger()ĭrop trigger address_update_before // ERROR 1360 (HY000): Trigger does not exist MySQLHow to drop a large table 2020 5 31 charlie27 Databases 518 We can do drop table but it takes long time mysql> DROP table erp We should enable innodb file per table in my.cnf first innodbfilepertable 1 The reason that make delete table slow is because we have large. nf) like so: Īttempting to drop a trigger from a stored procedure will fail. Mysql -defaults-extra-file=.nf -disable-column-names |
The simplest solution to drop all triggers might be a bash script: echo "select concat('drop trigger ', trigger_name, ' ')įrom information_iggers where trigger_schema = 'your_database'" |
Unfortunately this is not possible in a regular SQL statement or a stored procedure.
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