Understanding the "up_value" Field in User Preferences
editOverview
editThe "up_value" field in user preferences indicates whether a particular preference is enabled or disabled for a user. This documentation aims to clarify the significance of "up_value" field in MariaDB and its implications for data analysis.
Context
editA question was raised regarding the interpretation of the "up_value" field in user preferences. Specifically, whether a value of 1 signifies an enabled preference and an empty or null value indicates a disabled preference.
| up_property | up_value | COUNT (1) |
|---|---|---|
| vector-2022-beta-feature | 31577 | |
| vector-2022-beta-feature | 1 | 10573 |
| vector-2022-beta-feature-local-exception | 59 | |
| vector-2022-beta-feature-local-exception | 1 | 1 |
Clarification
edit- If "up_value" is set to 1, it indeed indicates that the preference is enabled or true for that user.
- Conversely, an empty or null "up_value" typically indicates that the preference is disabled or false for that user.
PHP-ism Explanation
editThe observed behavior of empty values in the "up_value" field is attributed to a PHP-ism. When boolean values are cast to strings, true is represented as "1" and false results in an empty string. This behavior manifests in database entries.
Understanding Specific "up_property"
edit- The suffix "-local-exception" denotes a local override set by the GlobalPreferences extension. However, this suffix doesn't alter the interpretation of the property's name.
- The segment "vector-2022-beta-feature" represents the machine-readable name of a specific beta feature, namely, "Accessibility for Reading (Vector 2022)."
Interpretation of Name/Value Pair
editIn the last row, we see the following:
up_property=vector-2022-beta-feature-local-exceptionandup_value=1,
The above name/value pair should be understood as follows: "the user has enabled the Accessibility beta feature and consequently encountered the font size menu while browsing this wiki."