Struct OpenDalTable 

pub struct OpenDalTable { /* private fields */ }

Virtual table for cloud storage backends

This is a generic implementation that can work with any storage backend. Configuration is passed through hidden columns in SQL queries.

Trait Implementations

impl CreateVTab<'_> for OpenDalTable

const KIND: VTabKind = VTabKind::EponymousOnly

Virtual table kind (eponymous means no CREATE VIRTUAL TABLE needed)

fn create( db: &mut VTabConnection, aux: Option<&Self::Aux>, args: &[&[u8]], ) -> Result<(String, Self), Error>

Create a new instance of a virtual table in response to a CREATE VIRTUAL TABLE statement. The db parameter is a pointer to the SQLite database connection that is executing the CREATE VIRTUAL TABLE statement.

fn destroy(&self) -> Result<(), Error>

Destroy the underlying table implementation. This method undoes the work of create.

impl VTab<'_> for OpenDalTable

fn connect( _db: &mut VTabConnection, _aux: Option<&Self::Aux>, _args: &[&[u8]], ) -> Result<(String, Self)>

Connect to the virtual table

This defines the table schema that SQLite will use.

fn best_index(&self, info: &mut IndexInfo) -> Result<()>

Determine the best index strategy for a query

This tells SQLite how to optimize the query.

fn open(&mut self) -> Result<Self::Cursor>

Open a new cursor for iterating through results

type Aux = ()

Client data passed to Connection::create_module.

type Cursor = OpenDalCursor

Specific cursor implementation