Module sqlx_oldapi::sqlite::types

Available on crate feature sqlite only.

Conversions between Rust and SQLite types.

Types

Rust type	SQLite type(s)
bool	BOOLEAN
i8	INTEGER
i16	INTEGER
i32	INTEGER
i64	BIGINT, INT8
u8	INTEGER
u16	INTEGER
u32	INTEGER
f32	REAL
f64	REAL
&str, String	TEXT
&[u8], Vec<u8>	BLOB

Note: Unsigned Integers

The unsigned integer types u8, u16 and u32 are implemented by zero-extending to the next-larger signed type. So u8 becomes i16, u16 becomes i32, and u32 becomes i64 while still retaining their semantic values.

Similarly, decoding performs a checked truncation to ensure that overflow does not occur.

SQLite stores integers in a variable-width encoding and always handles them in memory as 64-bit signed values, so no space is wasted by this implicit widening.

However, there is no corresponding larger type for u64 in SQLite (it would require a i128), and so it is not supported. Bit-casting it to i64 or storing it as REAL, BLOB or TEXT would change the semantics of the value in SQL and so violates the principle of least surprise.

chrono

Requires the chrono Cargo feature flag.

Rust type	Sqlite type(s)
chrono::NaiveDateTime	DATETIME
chrono::DateTime<Utc>	DATETIME
chrono::DateTime<Local>	DATETIME
chrono::NaiveDate	DATE
chrono::NaiveTime	TIME

time

Requires the time Cargo feature flag.

Rust type	Sqlite type(s)
time::PrimitiveDateTime	DATETIME
time::OffsetDateTime	DATETIME
time::Date	DATE
time::Time	TIME

uuid

Requires the uuid Cargo feature flag.

Rust type	Sqlite type(s)
uuid::Uuid	BLOB, TEXT
uuid::fmt::Hyphenated	TEXT

json

Requires the json Cargo feature flag.

Rust type	Sqlite type(s)
[Json<T>]	TEXT
serde_json::JsonValue	TEXT
&serde_json::value::RawValue	TEXT

Nullable

In addition, Option<T> is supported where T implements Type. An Option<T> represents a potentially NULL value from SQLite.