Trait Sqlite3Metadata 

pub unsafe trait Sqlite3Metadata: Sqlite3Api {
    // Required methods
    unsafe fn table_column_metadata(
        &self,
        db: NonNull<Self::Db>,
        db_name: Option<&str>,
        table: &str,
        column: &str,
    ) -> Result<ColumnMetadata>;
    unsafe fn column_decltype(
        &self,
        stmt: NonNull<Self::Stmt>,
        col: i32,
    ) -> Option<RawBytes>;
    unsafe fn column_name(
        &self,
        stmt: NonNull<Self::Stmt>,
        col: i32,
    ) -> Option<RawBytes>;
    unsafe fn column_table_name(
        &self,
        stmt: NonNull<Self::Stmt>,
        col: i32,
    ) -> Option<RawBytes>;
}

Optional backend extension for metadata helpers.

Safety

Implementations must ensure returned raw metadata pointers are valid for the documented SQLite lifetime and ownership rules.

Required Methods

unsafe fn table_column_metadata( &self, db: NonNull<Self::Db>, db_name: Option<&str>, table: &str, column: &str, ) -> Result<ColumnMetadata>

Query table/column metadata for the specified schema object.

unsafe fn column_decltype( &self, stmt: NonNull<Self::Stmt>, col: i32, ) -> Option<RawBytes>

Return declared type text for output column col.

unsafe fn column_name( &self, stmt: NonNull<Self::Stmt>, col: i32, ) -> Option<RawBytes>

Return output column name for col.

unsafe fn column_table_name( &self, stmt: NonNull<Self::Stmt>, col: i32, ) -> Option<RawBytes>

Return source table name for output column col, when available.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors