Save snapshot of open editors on close

Enabled by default. Permits saving and reloading the SQL editor tabs after MySQL Workbench is closed and reopened (including after an unexpected shutdown).

Auto-save scripts interval: [ 10 seconds ]

Frequency of the automatic saves. Scripts are restored from the last saved version, if MySQL Workbench shuts down.

Create new tabs as Query tabs instead of File

By default, opening a new SQL editor tab opens as an SQL File tab. Select this option if you prefer the simpler Query tabs that, for example, do not prompt to be saved when closed.

Restore expanded state of the active schema objects

Enabled by default. Group nodes that were previously expanded in the active schema when the SQL editor was last closed are re-expanded and loaded.

Show Schema Contents in Schema Tree

Enabled by default. Enumerating, populating, and drawing large numbers of items can significantly increase loading times. For this reason, this facility can be switched off for models containing large numbers of schemas and tables.

Show Metadata and Internal Schemas

Whether to show metadata and internal schemas in the schema tree, such as INFORMATION_SCHEMA, mysql, and schemas starting with the period character (.).

DBMS connection keep-alive interval (in seconds): [600]

Time interval between sending keep-alive messages to the DBMS. Set the value to 0 to not send keep-alive messages.

DBMS connection read timeout interval (in seconds):[30]

The maximum amount of time the query can take to return data from the DBMS. Set the value to 0 to skip the read timeout.

DBMS connection timeout interval (in seconds): [60]

Maximum time to wait before a connection attempt is aborted.

Internal Workbench Schema: [.mysqlworkbench]

This schema is used by MySQL Workbench to store information required for certain operations, such as saving shared SQL snippets.

Safe Updates (rejects UPDATEs and DELETEs with no restrictions)

Enabled by default. Prevents UPDATE and DELETE queries that lack a corresponding key in a WHERE clause, or lack a LIMIT clause, from executing. This option requires a MySQL server reconnection.

When selected, this preference makes it possible to catch UPDATE and DELETE statements with keys that are not used properly and that can probably accidentally change or delete a large number of rows.

Enable Code Completion in Editors

The SQL Editor offers autocomplete functionality by either pressing the keyboard shortcut (Modifier + Space), or it will start automatically if the Automatically Start Code Completion preference is enabled.

Comment type to use for comment shortcut: [--]

Defaults to the -- comment characters, with the # character as an alternative comment option.

Max syntax error count: [ 100 ]

Large complex scripts may contain errors. Further, a syntax error early on can lead to subsequent syntax errors. For these reasons, it is possible to limit the number of errors displayed using this option. The default is 100 error messages.

Max number of result sets: [ 50 ]

Maximum number of result sets for SQL queries that can be opened for a single SQL editor. Defaults to 50. Reaching the limit emits a warning.

Change keywords to UPPER CASE

Enabled by default. Executing the SQL beautifier sets all SQL keywords to uppercase.

Default algorithm for ALTER table: [ Default ]

Sets the default algorithm when performing ALTER TABLE operations in MySQL Workbench. The setting can also be adjusted for each ALTER TABLE operation. Options include Default, In-Place (preferred), and Copy. See the online DDL documentation for more information.

Default lock for ALTER table: [ Default ]

Sets the default lock setting to allow concurrent queries with ALTER TABLE in MySQL Workbench. This setting can also be adjusted for each ALTER TABLE operation. Options include Default, None, Shared, and Exclusive. See the online DDL documentation for more information.

Reformat DDL for Views

Enabled by default. Determines whether to automatically reformat the View DDL that is returned by the MySQL server.

Max. query length to store in history (in bytes): [ 65536 ]

Queries that exceed this size are not be saved in the history when executed. Setting this value to 0 eliminates the limit (all queries are saved).

Continue on SQL script execution on errors (by default)

Should an error occur while executing a script, this option causes the execution to continue for the remainder of the script.

New connections use auto commit mode

Enabled by default. Toggles the default autocommit mode for new connections. When enabled, the editor commits each statement immediately.

Progress status update interval (in milliseconds): [ 500 ]

When executing long running queries over a slow connection, you may need to increase this value to prevent excess load on the connection.

Limit Rows

Enabled by default. Queries can sometimes return an excessive number of rows, which can heavily load the connection, and take time to display in MySQL Workbench. To prevent this, you can set a more moderate value here. This limit is defined by the Limit Rows Count option.

Limit Rows Count: [ 200 ]

Specify the maximum number of result rows to return.

Max. Field Value Length to Display (in bytes): [ 256 ]

To avoid display problems due to excessive field length, it is possible to set the maximum field length to display (in bytes).

Treat BINARY/VARBINARY as non-binary character string

Binary byte string values are not displayed by default in the results grid, but are instead marked as BLOB values. These can then be viewed or edited with the BLOB editor. Nonbinary character string values are displayed in the results grid, and can be edited in the grid cell or using the BLOB editor.

If this option is turned on, data truncation may result: Binary byte string values may contain null bytes as part of their valid data, whereas for nonbinary character strings, a null byte terminates the string.

Confirm Data Changes

Enabled by default. If you edit table data in the SQL Editor and then click Applying changes to data, MySQL Workbench launches a wizard to step through your changes before applying them. If this option is deselected, the changes are applied to the server without the wizard being displayed and without giving you a chance to review the changes.

Preserve Row Filter

Enabled by default. This option preserves the active filter on resultset changes. The filter is reset when the option is disabled.