Trait RowSchema 

pub trait RowSchema {
    // Required methods
    fn schema() -> &'static [&'static str]
       where Self: Sized;
    fn column_count(&self) -> usize;
    fn get_column(&self, idx: usize) -> Result<ColumnValue<'_>, ColumnError>;
}

Trait for types that can describe their columnar schema and provide column values.

This trait enables generic serialization of row types to columnar formats. Implementations are typically generated by the SerializeRow derive macro.

The trait is object-safe: schema() has a Self: Sized bound which excludes it from the vtable, while column_count() and get_column() can be called on trait objects.

Required Methods

fn schema() -> &'static [&'static str]

where Self: Sized,

Returns the column names for this row type.

This method requires Self: Sized and cannot be called on trait objects. Use column_count() for the number of columns when working with dyn RowSchema.

fn column_count(&self) -> usize

Returns the number of columns in the schema.

This is an object-safe alternative to schema().len() for use with trait objects.

fn get_column(&self, idx: usize) -> Result<ColumnValue<'_>, ColumnError>

Returns the value at the given column index.

Returns an error if the index is out of bounds.

Implementations on Foreign Types

impl<T: RowSchema> RowSchema for Arc<T>

Blanket implementation for Arc<T> - delegates to inner type. This allows processors to return Arc<RowType> while still satisfying RowSchema.

fn schema() -> &'static [&'static str]

where Self: Sized,

fn column_count(&self) -> usize

fn get_column(&self, idx: usize) -> Result<ColumnValue<'_>, ColumnError>

Implementors

impl RowSchema for CheckpointRow

impl RowSchema for DynamicFieldRow

impl RowSchema for EventRow

impl RowSchema for MoveCallRow

impl RowSchema for MovePackageRow

impl RowSchema for ObjectRow

impl RowSchema for PackageBCSRow

impl RowSchema for TransactionBCSRow

impl RowSchema for TransactionObjectRow

impl RowSchema for TransactionRow

impl RowSchema for WrappedObjectRow