plrust_trusted_pgx::spi

Struct SpiHeapTupleData

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pub struct SpiHeapTupleData { /* private fields */ }
Expand description

Represents the set of pg_sys::Datums in a pg_sys::HeapTuple

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impl SpiHeapTupleData

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pub unsafe fn new( tupdesc: *mut TupleDescData, htup: *mut HeapTupleData, ) -> Result<Option<SpiHeapTupleData>, Error>

Create a new SpiHeapTupleData from its constituent parts

§Safety

This is unsafe as it cannot ensure that the provided tupdesc and htup arguments are valid, palloc’d pointers.

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pub fn get<T>(&self, ordinal: usize) -> Result<Option<T>, Error>
where T: IntoDatum + FromDatum,

Get a typed value from this HeapTuple by its ordinal position.

The ordinal position is 1-based

§Errors

Returns a Error::DatumError if the desired Rust type is incompatible with the underlying Datum

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pub fn get_by_name<T, S>(&self, name: S) -> Result<Option<T>, Error>
where T: IntoDatum + FromDatum, S: AsRef<str>,

Get a typed value from this HeapTuple by its name in the resultset.

§Errors

Returns a Error::DatumError if the desired Rust type is incompatible with the underlying Datum

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pub fn get_datum_by_ordinal( &self, ordinal: usize, ) -> Result<&SpiHeapTupleDataEntry, Error>

Get a raw Datum from this HeapTuple by its ordinal position.

The ordinal position is 1-based.

§Errors

If the specified ordinal is out of bounds a [Error::SpiError(SpiError::NoAttribute)] is returned

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pub fn get_datum_by_name<S>( &self, name: S, ) -> Result<&SpiHeapTupleDataEntry, Error>
where S: AsRef<str>,

Get a raw Datum from this HeapTuple by its field name.

§Errors

If the specified name isn’t valid a [Error::SpiError(SpiError::NoAttribute)] is returned

§Panics

This function will panic if somehow the specified name contains a null byte.

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pub fn set_by_ordinal<T>( &mut self, ordinal: usize, datum: T, ) -> Result<(), Error>
where T: IntoDatum,

Set a datum value for the specified ordinal position

§Errors

If the specified ordinal is out of bounds a SpiErrorCodes::NoAttribute is returned

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pub fn set_by_name<T>(&mut self, name: &str, datum: T) -> Result<(), Error>
where T: IntoDatum,

Set a datum value for the specified field name

§Errors

If the specified name isn’t valid a [Error::SpiError(SpiError::NoAttribute)] is returned

§Panics

This function will panic if somehow the specified name contains a null byte.

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pub fn columns(&self) -> usize

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impl Index<&str> for SpiHeapTupleData

Provide named indexing into a SpiHeapTupleData.

If the field name doesn’t exist, it will panic

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type Output = SpiHeapTupleDataEntry

The returned type after indexing.
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fn index(&self, index: &str) -> &<SpiHeapTupleData as Index<&str>>::Output

Performs the indexing (container[index]) operation. Read more
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impl Index<usize> for SpiHeapTupleData

Provide ordinal indexing into a SpiHeapTupleData.

If the index is out of bounds, it will panic

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type Output = SpiHeapTupleDataEntry

The returned type after indexing.
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fn index(&self, index: usize) -> &<SpiHeapTupleData as Index<usize>>::Output

Performs the indexing (container[index]) operation. Read more

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const ITEM_ID: Lazy<TypeId>

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const OPTION_ID: Lazy<Option<TypeId>>

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const VEC_ID: Lazy<Option<TypeId>>

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const VEC_OPTION_ID: Lazy<Option<TypeId>>

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const OPTION_VEC_ID: Lazy<Option<TypeId>>

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const OPTION_VEC_OPTION_ID: Lazy<Option<TypeId>>

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const ARRAY_ID: Lazy<Option<TypeId>>

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const OPTION_ARRAY_ID: Lazy<Option<TypeId>>

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const VARIADICARRAY_ID: Lazy<Option<TypeId>>

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const OPTION_VARIADICARRAY_ID: Lazy<Option<TypeId>>

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const VARLENA_ID: Lazy<Option<TypeId>>

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const OPTION_VARLENA_ID: Lazy<Option<TypeId>>

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fn register_with_refs(map: &mut HashSet<RustSqlMapping>, single_sql: String)
where Self: 'static,

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fn register_sized_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String, )
where Self: 'static,

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fn register_sized(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register_varlena_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String, )
where Self: 'static,

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fn register_varlena(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register_array_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String, )
where Self: 'static,

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fn register_array(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register(set: &mut HashSet<RustSqlMapping>, single_sql: String)
where Self: 'static,