测试async_basic.rs中报以下错误 #19
Description
我在测试async_basic.rs中报以下错误，连接的是华为云GaussDB，请看看怎么解决。
Compiling gaussdb-examples v0.1.1 (/home/projects/gaussdb-rust/examples)
error[E0599]: no method named clone found for struct Client in the current scope
--> examples/src/async_basic.rs:69:29
|
69 | let client = client.clone();
| ^^^^^ method not found in Client
error[E0308]: mismatched types
--> examples/src/async_basic.rs:73:37
|
73 | &[&name, &category, &price],
| ^^^^^^ expected &&str, found &{float}
|
= note: expected reference &&str
found reference &{float}
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:104:48
|
104 | let price: rust_decimal::Decimal = row.get(3);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:122:48
|
122 | let price: rust_decimal::Decimal = row.get(1);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: PhantomPinned cannot be unpinned
--> examples/src/async_basic.rs:157:34
|
157 | while let Some(row) = stream.try_next().await? {
| ^^^^^^^^ unsatisfied trait bound
|
= help: within tokio_gaussdb::query::_::__Origin<'_>, the trait Unpin is not implemented for PhantomPinned
= note: consider using the pin! macro
consider using Box::pin if you need to access the pinned value outside of the current scope
note: required because it appears within the type tokio_gaussdb::query::_::__Origin<'_>
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/query.rs:286:1
|
286 | / pin_project! {
287 | | /// A stream of table rows.
288 | | pub struct RowStream {
289 | | statement: Statement,
... |
295 | | }
| |^
= note: required for RowStream to implement Unpin
note: required by a bound in try_next
--> /root/.cargo/registry/src/rsproxy.cn-e3de039b2554c837/futures-util-0.3.31/src/stream/try_stream/mod.rs:406:15
|
404 | fn try_next(&mut self) -> TryNext<', Self>
| -------- required by a bound in this associated function
405 | where
406 | Self: Unpin,
| ^^^^^ required by this bound in TryStreamExt::try_next
= note: this error originates in the macro $crate::__pin_project_make_unpin_impl which comes from the expansion of the macro pin_project (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0277]: PhantomPinned cannot be unpinned
--> examples/src/async_basic.rs:157:45
|
157 | while let Some(row) = stream.try_next().await? {
| ^^^^^ unsatisfied trait bound
|
= help: within tokio_gaussdb::query::_::__Origin<'_>, the trait Unpin is not implemented for PhantomPinned
= note: consider using the pin! macro
consider using Box::pin if you need to access the pinned value outside of the current scope
note: required because it appears within the type tokio_gaussdb::query::_::__Origin<'_>
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/query.rs:286:1
|
286 | / pin_project! {
287 | | /// A stream of table rows.
288 | | pub struct RowStream {
289 | | statement: Statement,
... |
295 | | }
| |_^
= note: required for RowStream to implement Unpin
= note: required for TryNext<'_, RowStream> to implement futures_util::Future
= note: required for TryNext<'_, RowStream> to implement std::future::IntoFuture
= note: this error originates in the macro $crate::__pin_project_make_unpin_impl which comes from the expansion of the macro pin_project (in Nightly builds, run with -Z macro-backtrace for more info)
help: remove the .await
|
157 - while let Some(row) = stream.try_next().await? {
157 + while let Some(row) = stream.try_next()? {
|
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:159:48
|
159 | let price: rust_decimal::Decimal = row.get(1);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:176:48
|
176 | let price: rust_decimal::Decimal = row.get(1);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:210:58
|
210 | let avg_price: Option<rust_decimal::Decimal> = stats.get(2);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
= note: required for Option<Decimal> to implement FromSql<'_>
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:211:50
|
211 | let max_price: rust_decimal::Decimal = stats.get(3);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
error[E0277]: the trait bound Decimal: FromSql<'_> is not satisfied
--> examples/src/async_basic.rs:212:50
|
212 | let min_price: rust_decimal::Decimal = stats.get(4);
| ^^^ the trait FromSql<'_> is not implemented for Decimal
|
= help: the following other types implement trait FromSql<'a>:
&'a [u8]
&'a str
Box<[T]>
Box
Date
HashMap<String, Option, S>
IpAddr
Option
and 14 others
note: required by a bound in tokio_gaussdb::Row::get
--> /home/projects/gaussdb-rust/tokio-gaussdb/src/row.rs:149:12
|
146 | pub fn get<'a, I, T>(&'a self, idx: I) -> T
| --- required by a bound in this associated function
...
149 | T: FromSql<'a>,
| ^^^^^^^^^^^ required by this bound in Row::get
Some errors have detailed explanations: E0277, E0308, E0599.
For more information about an error, try rustc --explain E0277.
error: could not compile gaussdb-examples (bin "async_basic") due to 11 previous errors
而且我还发现DECIMAL 或 NUMERIC 类型在 tokio-gaussdb 中没有直接的 f64 映射支持。