connectorx/transports/
sqlite_arrow.rs

1//! Transport from SQLite Source to Arrow Destination.
2
3use crate::{
4    destinations::arrow::{
5        typesystem::{ArrowTypeSystem, NaiveDateTimeWrapperMicro, NaiveTimeWrapperMicro},
6        ArrowDestination, ArrowDestinationError,
7    },
8    sources::sqlite::{SQLiteSource, SQLiteSourceError, SQLiteTypeSystem},
9    typesystem::TypeConversion,
10};
11use chrono::{NaiveDate, NaiveDateTime, NaiveTime};
12use thiserror::Error;
13
14#[derive(Error, Debug)]
15pub enum SQLiteArrowTransportError {
16    #[error(transparent)]
17    Source(#[from] SQLiteSourceError),
18
19    #[error(transparent)]
20    Destination(#[from] ArrowDestinationError),
21
22    #[error(transparent)]
23    ConnectorX(#[from] crate::errors::ConnectorXError),
24}
25
26/// Convert SQLite data types to Arrow data types.
27pub struct SQLiteArrowTransport;
28
29impl_transport!(
30    name = SQLiteArrowTransport,
31    error = SQLiteArrowTransportError,
32    systems = SQLiteTypeSystem => ArrowTypeSystem,
33    route = SQLiteSource => ArrowDestination,
34    mappings = {
35        { Bool[bool]                 => Boolean[bool]           | conversion auto }
36        { Int8[i64]                  => Int64[i64]              | conversion auto }
37        { Int4[i32]                  => Int64[i64]              | conversion auto }
38        { Int2[i16]                  => Int64[i64]              | conversion auto }
39        { Real[f64]                  => Float64[f64]            | conversion auto }
40        { Text[Box<str>]             => LargeUtf8[String]       | conversion option }
41        { Blob[Vec<u8>]              => LargeBinary[Vec<u8>]    | conversion auto }
42        { Date[NaiveDate]            => Date32[NaiveDate]       | conversion auto }
43        { Time[NaiveTime]            => Time64Micro[NaiveTimeWrapperMicro]       | conversion option }
44        { Timestamp[NaiveDateTime]   => Date64Micro[NaiveDateTimeWrapperMicro]   | conversion option }
45    }
46);
47
48impl TypeConversion<Box<str>, String> for SQLiteArrowTransport {
49    fn convert(val: Box<str>) -> String {
50        val.to_string()
51    }
52}
53
54impl TypeConversion<NaiveTime, NaiveTimeWrapperMicro> for SQLiteArrowTransport {
55    fn convert(val: NaiveTime) -> NaiveTimeWrapperMicro {
56        NaiveTimeWrapperMicro(val)
57    }
58}
59
60impl TypeConversion<NaiveDateTime, NaiveDateTimeWrapperMicro> for SQLiteArrowTransport {
61    fn convert(val: NaiveDateTime) -> NaiveDateTimeWrapperMicro {
62        NaiveDateTimeWrapperMicro(val)
63    }
64}
connectorx/transports/sqlite_arrow.rs

connectorx/transports/
sqlite_arrow.rs
