MySQL raises this error when a string or non-numeric token is supplied to an option that only accepts integers.
MySQL Error 78: EE_INCORRECT_INT_VALUE_FOR_OPTION arises when you pass a non-numeric string to an integer-only server or session option. Supply a valid integer (for example, SET GLOBAL max_connections = 200) or correct the value in my.cnf to resolve the issue.
Incorrect integer value: '%s'. EE_INCORRECT_INT_VALUE_FOR_OPTION was added in 8.0.13.
MySQL returns error 78 when it cannot convert a provided value to an integer for a server, session, or startup option. The message format is "Incorrect integer value: 'abc'" and appears in the error log or directly in the client.
The error surfaces at startup while parsing my.cnf, during runtime when executing SET commands, or inside ALTER INSTANCE statements that modify integer variables.
Any client, connector, or GUI that issues the invalid assignment triggers the failure.
MySQL ignores or reverts to default values when the integer cannot be parsed, leaving performance limits unchanged and producing noisy logs. Critical configuration—such as max_connections—may remain too low, leading to connection errors in production.
Most cases trace back to typos, quotes around numbers, variable deprecations, or platform-specific scripts that concatenate strings.
Understanding the exact trigger guides a clean fix.
Identify the problematic variable, validate the intended integer, and reapply the option using a correct numeric literal. Restart or reload configuration files if the value is defined in my.cnf.
Startup configuration mistakes, automated deployment scripts, and ad-hoc SET statements are the three most frequent scenarios.
Each has a direct SQL or file-based remedy documented below.
Use parameter validation tools, enforce type-safe configuration management, and enable strict SQL mode during development to surface the issue early. Galaxy’s SQL editor highlights non-numeric assignments before they reach the server.
Errors 1093 (variable read-only), 1231 (variable unknown), and ER_WRONG_VALUE_FOR_VAR frequently accompany EE_INCORRECT_INT_VALUE_FOR_OPTION. Resolution steps overlap and are listed later in this guide.
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An extra character such as "O" in "1O0" makes the token non-numeric, triggering the error at startup.
Values wrapped in single quotes in my.cnf—e.g., max_connections='200'—are parsed as strings and rejected.
Deployment scripts that merge environment variables into SQL may accidentally produce alphabetic characters, leading to incorrect values.
Using an old variable whose new replacement expects a boolean or enum can cause MySQL to misinterpret the supplied value.
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Usually MySQL starts but ignores the invalid option, logging the error. If the option is critical, startup might abort in strict configuration.
Ignoring it leaves default values active, which can degrade performance or functionality. Always correct the setting.
Check the error log; MySQL prints the variable name and the invalid value directly after the error message.
Galaxy surfaces lint warnings and suggests valid integers but lets you approve the final change, ensuring full control.
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