Data Types¶

The driver maps database data types to matching Rust types to achieve seamless sending and receiving of CQL values.

See the following chapters for examples on how to send and receive each data type.

See Query values for more information about sending values in queries.
See Query result for more information about reading values from queries

Database types and their Rust equivalents:

• Boolean <—-> bool

• Tinyint <—-> i8

• Smallint <—-> i16

• Int <—-> i32

• BigInt <—-> i64

• Float <—-> f32

• Double <—-> f64

• Ascii, Text, Varchar <—-> &str, String

• Counter <—-> value::Counter

• Blob <—-> Vec<u8>

• Inet <—-> std::net::IpAddr

• Uuid <—-> uuid::Uuid

• Timeuuid <—-> value::CqlTimeuuid

• Date <—-> value::CqlDate, chrono::NaiveDate, time::Date

• Time <—-> value::CqlTime, chrono::NaiveTime, time::Time

• Timestamp <—-> value::CqlTimestamp, chrono::DateTime<Utc>, time::OffsetDateTime

• Duration <—-> value::CqlDuration

• Decimal <—-> value::CqlDecimal, bigdecimal::Decimal

• Varint <—-> value::CqlVarint, num_bigint::BigInt (v0.3 and v0.4)

• List <—-> Vec<T>

• Set <—-> Vec<T>

• Map <—-> std::collections::HashMap<K, V>

• Tuple <—-> Rust tuples

• UDT (User defined type) <—-> Custom user structs with macros