pub struct Record<ST: 'static>();
Available on crate feature postgres_backend
only.
Expand description
The Record
(a.k.a. tuple) SQL type.
- Any tuple which can be serialized to each of the elements
(note: There are major caveats, see the section below)
- Any tuple which can be deserialized from each of the elements.
§Caveats about serialization
Typically in the documentation for SQL types, we use “FromSql
impls”
as a shorthand for “Rust types that you can use to represent this type”.
For every other type, that means there is specifically an implementation
of the FromSql
trait.
However, PostgreSQL does not support transmission of anonymous record
types as bind parameters. It only supports transmission for named
composite types. For this reason, if you tried to do
int_tuple_col.eq((1, 2))
, we will generate the SQL int_tuple_col = ($1, $2)
rather than int_tuple_col = $1
as we would for anything
else.
This should not be visible during normal usage. The only time this would
affect you is if you were attempting to use sql_query
with tuples.
Your code would not compile in that case, as the ToSql
trait itself is
not implemented.
You can implement ToSql
for named composite types. See WriteTuple
for details.
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
The expression being returned
Perform the conversion
Performs copy-assignment from
source
.
Read more
Formats the value using the given formatter.
Read more
Returns the “default value” for a type.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
See the trait documentation.
A specialized variant of
from_sql
for handling null values.
Read more
Fetch the metadata for the given type
Read more
A type which uniquely represents
Self
in a SQL query.
Read more
Can the SQL generated by
Self
be uniquely identified by its type?
Read more
Returns the type id of
Self::QueryId
if
Self::HAS_STATIC_QUERY_ID
.
Returns
None
otherwise.
Read more
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
The Rust type you’d like to map from.
Read more
Construct an instance of this type
Immutably borrows from an owned value.
Read more
Mutably borrows from an owned value.
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Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes
only.
Returns the argument unchanged.
Calls U::from(self)
.
That is, this conversion is whatever the implementation of
From<T> for U
chooses to do.
The not nullable representation of this type.
Read more
The nullable representation of this type.
Read more
Convert
self
to an expression for Diesel’s query builder.
Read more
Convert
&self
to an expression for Diesel’s query builder.
Read more
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning.
Read more
Uses borrowed data to replace owned data, usually by cloning.
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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.