How SQLite Converts Data: Affinity Rules in Action

Hello, I'm Maneshwar. I'm working on git-lrc : a Git hook for Checking AI generated code. In the previous post, we explored storage type determination and column affinity . We saw how SQLite assigns an initial storage type to values and how columns have a preferred type through affinity. Today we complete the picture by looking at data conversion , the step where SQLite decides whether a value should remain as it is or be converted to match the column’s affinity. This is where SQLite’s flexible typing model becomes practical and predictable. Data Conversion in SQLite SQLite maintains a relationship between storage types (INTEGER, REAL, TEXT, BLOB, NULL) and column affinity types (TEXT, NUMERIC, INTEGER, REAL, NONE). When a value is inserted into a table column, the VM performs the following sequence: Determine the initial storage type of the input value. Determine the affinity type of the destination column. Attempt to convert the value to match the column affinity , if appropriate. If