Struct diesel::pg::types::sql_types::Jsonb
[−]
[src]
pub struct Jsonb;
The jsonb
SQL type. This type can only be used with feature = "serde_json"
jsonb
offers several advantages over regular JSON:
There are two JSON data types:
json
andjsonb
. They accept almost identical sets of values as input. The major practical difference is one of efficiency. Thejson
data type stores an exact copy of the input text, which processing functions must reparse on each execution; whilejsonb
data is stored in a decomposed binary format that makes it slightly slower to input due to added conversion overhead, but significantly faster to process, since no reparsing is needed.jsonb
also supports indexing, which can be a significant advantage....In general, most applications should prefer to store JSON data as
jsonb
, unless there are quite specialized needs, such as legacy assumptions about ordering of object keys.
ToSql
impls
FromSql
impls
Examples
extern crate serde_json; table! { contacts { id -> Integer, name -> VarChar, address -> Jsonb, } } let santas_address: serde_json::Value = serde_json::from_str(r#"{ "street": "Article Circle Expressway 1", "city": "North Pole", "postcode": "99705", "state": "Alaska" }"#).unwrap(); let inserted_address = insert_into(contacts) .values((name.eq("Claus"), address.eq(&santas_address))) .returning(address) .get_result(&connection); assert_eq!(Ok(santas_address), inserted_address);
Trait Implementations
impl<'expr> AsExpression<Jsonb> for &'expr Value
[src]
type Expression = Bound<Jsonb, Self>
The expression being returned
fn as_expression(self) -> Self::Expression
[src]
Perform the conversion
impl<'expr2, 'expr> AsExpression<Jsonb> for &'expr2 &'expr Value
[src]
type Expression = Bound<Jsonb, Self>
The expression being returned
fn as_expression(self) -> Self::Expression
[src]
Perform the conversion
impl AsExpression<Jsonb> for Value
[src]
type Expression = Bound<Jsonb, Self>
The expression being returned
fn as_expression(self) -> Self::Expression
[src]
Perform the conversion
impl FromSql<Jsonb, Pg> for Value
[src]
impl ToSql<Jsonb, Pg> for Value
[src]
impl QueryId for Jsonb
[src]
type QueryId = Jsonb
A type which uniquely represents Self
in a SQL query. Read more
const HAS_STATIC_QUERY_ID: bool
HAS_STATIC_QUERY_ID: bool = true
Can the SQL generated by Self
be uniquely identified by its type? Read more
fn query_id() -> Option<TypeId>
[src]
Returns the type id of Self::QueryId
if Self::HAS_STATIC_QUERY_ID
. Returns None
otherwise. Read more
impl NotNull for Jsonb
[src]
impl SingleValue for Jsonb
[src]
impl HasSqlType<Jsonb> for Pg
[src]
fn metadata(_: &PgMetadataLookup) -> PgTypeMetadata
[src]
Fetch the metadata for the given type Read more
fn row_metadata(
out: &mut Vec<Self::TypeMetadata>,
lookup: &Self::MetadataLookup
)
[src]
out: &mut Vec<Self::TypeMetadata>,
lookup: &Self::MetadataLookup
)
Fetch the metadata for a tuple representing an entire row Read more
impl Debug for Jsonb
[src]
fn fmt(&self, __arg_0: &mut Formatter) -> Result
[src]
Formats the value using the given formatter. Read more
impl Clone for Jsonb
[src]
fn clone(&self) -> Jsonb
[src]
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more