This section provides configuration options that affect the SQL Editor functionality in MySQL Workbench.
The SQL Editor preferences includes three additional sections: Query Editor, Object Editors, and SQL Execution.
Save snapshot of open editors on close: Enabling will save and reload the SQL Editor tabs after closing/opening MySQL Workbench (including after an unexpected crash).
Auto-save scripts interval: Frequency of the auto-saves.
Create new tabs as Query tabs instead of File: By default, opening a new SQL Editor tab opens as an SQL File tab. Check this option if you prefer the simpler Query tabs that, for example, will not prompt to be saved when closed.
Restore expanded state of the active schema objects: Group nodes that were previously expanded in the active schema when the SQL editor was last closed are re-expanded and loaded. This is enabled by default.
Show Schema Contents in Schema Tree: 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 schemata and tables.
Show Data Dictionaries and Internal
Schemas: Whether to show data directories and
internal schemas in the schema tree (such as
INFORMATION_SCHEMA, mysql, and schemas
starting with ".").
Combine Management Tools and Schema Tree tab: This affects the Object Browser in the left sidebar, and this option can also be toggled from the sidebar. The management tools and schema tree can be viewable as separate tabs, or as a single long list.
DBMS connection keep-alive interval (in
interval between sending keep-alive messages to the DBMS.
Set to 0 to not send keep-alive messages.
DBMS connection read time out (in
maximum amount of time the query can take to return data
from the DBMS. Set 0 to not check the read time out.
DBMS connection time out (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", forbid UPDATE and DELETE queries to execute that lack a corresponding key in a WHERE clause, or lack a LIMIT clause. Setting this option requires a MySQL server reconnection.
This makes it possible to catch UPDATE and DELETE statements where keys are not used properly and that would probably accidentally change or delete a large number of rows.
Enable Code Completion in Editors: The SQL Editor offers Auto-complete functionality by either pressing the keyboard shortcut (Modifier + Space), or it will start automatically if the Automatically Start Code Completion preference is enabled.
Automatically Start Code Completion: Enabled by default, this will automatically execute the code auto-completion feature while editing SQL in the SQL Editor. If disabled, you will instead use the keyboard shortcut Modifier + Space to execute the auto-completion routine.
Use UPPERCASE keywords on completion: Normally keywords are shown and inserted as they come from the code editor's configuration file. This setting will always write completed keywords as uppercase.
Comment type to use for comment
Defaults to "--", with "#" as another option.
Max syntax error count: 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: 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.
This option was added in MySQL Workbench 6.2.4.
[ ] Change keywords to UPPER CASE: Enabled by default, executing the SQL beautifier will uppercase all SQL keywords.
Default algorithm for ALTER table: The
default algorithm selected when performing
ALTER TABLE operations in
MySQL Workbench. The setting can also be adjusted for each
ALTER TABLE operation.
Options include "In-Place" (preferred) and "Copy", see the
documentation for more information.
Default lock for ALTER table: The
default lock setting for allowing concurrent queries with
ALTER TABLE in MySQL Workbench.
This setting can also be adjusted for each
ALTER TABLE operation.
Options include "None", "Shared", and "Exclusive", see the
documentation for more information.
Reformat DDL for Views: Whether to automatically reformat the View DDL that is returned by the MySQL Server.
The MySQL Server does not store the formatting information for View definitions.
Max query length to store in history (in bytes): Queries that exceed this size will not be saved in the history when executed. The default is 65536 bytes, and setting to 0 means there is no limit (all queries will be saved).
Continue on SQL Script Error: Should an error occur while executing a script, this option causes execution to continue for the remainder of the script.
Leave autocommit mode enabled by default: Toggles the default autocommit mode for connections. When enabled, each statement will be committed immediately.
All query tabs in the same connection share the same transaction. To have independent transactions, you must open a new connection.
Progress status update interval: When executing long running queries over a slow connection, you may need to increase this value to prevent excess load on the connection. Defaults to 500 milliseconds.
SELECT Query Results
Limit Rows: 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: Specify the maximum number of result rows to return. Defaults to 1000.
Max. Field Value Length to Display: To avoid display problems due to excessive field length, it is possible to set the maximum field length to display (in bytes). Defaults to 256.
Treat BINARY/VARBINARY as non-binary character
string: Binary byte string values are not
displayed by default in the results grid, but are instead
BLOB values. These can then be
viewed or edited with the
Nonbinary character string values are displayed in the
results grid, and can be edited in the grid cell or using
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: In the SQL Editor, if you edit table data and then click the Applying changes to data button, MySQL Workbench launches a wizard to step you through applying your changes. This gives you a chance to review the SQL that will be applied to the live server to make the requested changes. If this option is deselected, the changes will be applied to the server without the wizard being displayed and without giving you a chance to review the changes that will be made.