Trait TryConvert

pub trait TryConvert<T>: Sized {
    type Error;

    // Required method
    fn try_convert(self) -> Result<T, Self::Error>;
}

Required Associated Types

type Error

Required Methods

fn try_convert(self) -> Result<T, Self::Error>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl TryConvert<(Date, Time)> for Timestamp

type Error = Error

fn try_convert(self) -> Result<(Date, Time), Self::Error>

impl TryConvert<DmDateType> for &PgType

type Error = Error

fn try_convert(self) -> Result<DmDateType, Self::Error>

impl TryConvert<PgColumnItem> for (&OdbcColumnItem, &PgColumn)

type Error = String

fn try_convert(self) -> Result<PgColumnItem, Self::Error>

impl TryConvert<PgQueryResult> for (QueryResult, &Vec<PgTableItem>, &Options)

type Error = String

fn try_convert(self) -> Result<PgQueryResult, Self::Error>

impl TryConvert<Vec<PgColumn>> for (&Vec<OdbcColumn>, &Vec<PgTableItem>, &Options)

type Error = String

fn try_convert(self) -> Result<Vec<PgColumn>, Self::Error>

impl TryConvert<BufferDescription> for (&OdbcColumn, &Options)

type Error = String

fn try_convert(self) -> Result<BufferDescription, Self::Error>

impl TryConvert<PgTableDesc> for (TableDescResult, &Options)

type Error = Error

fn try_convert(self) -> Result<PgTableDesc, Self::Error>

impl TryConvert<PgTableItem> for DmTableItem

type Error = Error

fn try_convert(self) -> Result<PgTableItem, Self::Error>

impl TryConvert<Type> for DmDateType

type Error = Error

fn try_convert(self) -> Result<PgType, Self::Error>

impl TryConvert<Date> for Date

Convert odbc_api::sys::Date to time::Date

Example

use odbc_api_helper::TryConvert;

let odbc_data = OdbcDate{year: 2020,month: 1,day: 1};
assert_eq!(date!(2020 - 01 - 01), odbc_data.try_convert().unwrap());

let odbc_data = OdbcDate{year: 2022,month: 12,day: 31};
assert_eq!(date!(2022 - 12 - 31), odbc_data.try_convert().unwrap());

type Error = Error

fn try_convert(self) -> Result<Date, Self::Error>

impl TryConvert<PrimitiveDateTime> for Timestamp

type Error = Error

fn try_convert(self) -> Result<PrimitiveDateTime, Self::Error>

impl TryConvert<Time> for (Time, u32)

type Error = Error

fn try_convert(self) -> Result<Time, Self::Error>

impl TryConvert<Time> for Time

Convert odbc_api::sys::Time to time::Time

Example

use odbc_api_helper::TryConvert;

let odbc_time = OdbcTime { hour: 3,minute: 1,second: 1 };
assert_eq!(time!(03 : 01: 01), odbc_time.try_convert().unwrap());

let odbc_time = OdbcTime { hour: 19,minute: 31,second: 59 };
assert_eq!(time!(19 : 31 : 59), odbc_time.try_convert().unwrap());

type Error = Error

fn try_convert(self) -> Result<Time, Self::Error>

Implementors

impl TryConvert<DmTableDesc> for TableDescResult

type Error = Error

impl<T: StatementInput> TryConvert<Either<Vec<Box<dyn InputParameter>>, ()>> for T

TryConvert State StatementInput trait to EitherBoxParams

Example

use either::Either;
use odbc_api::parameter::InputParameter;
use odbc_api_helper::executor::statement::Statement;
use odbc_api_helper::extension::pg::PgValueInput;
use odbc_api_helper::TryConvert;

let statement = Statement::new("select * from empty where name=? and age=?",vec![
    PgValueInput::VARCHAR("foo".into()),
    PgValueInput::INT2(8)
]);

let left:Vec<Box<dyn InputParameter>> = statement.try_convert().unwrap().left().unwrap();
assert_eq!(left.len(),2);

let statement = "select * from empty where name=? and age=?";

let right:() = statement.try_convert().unwrap().right().unwrap();///
assert_eq!(right,());

type Error = OdbcHelperError