Struct GPkgDataSource 

pub struct GPkgDataSource { /* private fields */ }

GeoPackage DataSource binding a .gpkg database file + a layer name that maps rows to Features and Resources.

Implementations

impl GPkgDataSource

pub async fn from(gpkg_url: &str, layer_name: &str) -> Result<Self, MyError>

Constructor.

pub fn pool(&self) -> &Pool<Sqlite>

Return a reference to the connection pool.

pub fn vtable(&self) -> String

Return name of the virtual table created for querying this GeoPackage table.

This name is manufactured by pre-pending “vgpkg_” to the layer name in a similar way to how spatialite handles GeoPackage files.

pub fn to_sql(&self, exp: &Expression) -> Result<String, MyError>

Transform given Expression to an SQL WHERE clause that can be used for selecting a subset of this data source items.

Trait Implementations

impl DataSource for GPkgDataSource

fn srid(&self) -> Option<u32>

Return SRID of this if it was known at construction; None otherwise.

impl Debug for GPkgDataSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.