![]() ![]() ![]() I'm guessing however that there is a single underlying cause for both. Similarly, we also use sqlite3_column_value() and sqlite3_value_type() in certain cases which reports the same. Then sqlite3_column_type(stmt, 0) incorrectly (?) reports SQLITE_INTEGER. However, if you do: INSERT INTO foo(bar) VALUES (5.0) RETURNING bar Then sqlite3_column_type(stmt, 0) correctly reports SQLITE_FLOAT for that statement. If you have an INSERT statement like such: INSERT INTO foo(bar) VALUES (5.0) Īnd then SELECT that value back: SELECT bar FROM foo This optimization is completely invisible at the SQL level and can only be detected by examining the raw bits of the database file.)įor example, given the following table: CREATE TABLE foo(bar REAL) We’ll create a SQLite database, set up and install the Rocket framework for writing the server logic, and then use the Diesel framework to handle connections to the SQLite database. This tutorial will demonstrate how to use SQLite as the database context system for Rust APIs. (As an internal optimization, small floating point values with no fractional component and stored in columns with REAL affinity are written to disk as integers in order to take up less space and are automatically converted back into floating point as the value is read out. SQLite and Rust will provide you with speed and efficiency. feature not respecting the following guarantee regarding columns with a REAL type affinity: SQLite Data Types: Type AffinityĪ column with REAL affinity behaves like a column with NUMERIC affinity except that it forces integer values into floating point representation. We recently had an issue opened on our tracker that initially looked to be a bug on our end, but further investigation has led me to believe that it may be a bug in SQLite: launchbadge/sqlx#1596Įssentially, I think the issue boils down to the new INSERT. SQLx is an async Rust crate that lets us interact with a database with compile-time checked queries This post will be a short introduction to SQLx with PostgreSQL, but SQLx also supports MySQL, SQLite, and MSSQL. I'm a maintainer of SQLx, a SQL client for Rust.
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