pub fn create_tile_index(tr: &Transaction) -> rusqlite::Result<()> {
    tr.execute(
        "CREATE UNIQUE INDEX tile_index ON tiles (
            zoom_level, 
            tile_column, 
            tile_row
        )",
        [],
    )?;
    Ok(())
}
/// Creates the optional `tile_index` index for fast tile data lookup.
Creates the optional `tile_index` index for fast tile data lookup.
Creates the optional ` tile_index ` index for fast tile data lookup .
pub fn create_tile_index(tr: &Transaction) -> rusqlite::Result<()> {
    tr.execute(
        "CREATE UNIQUE INDEX tile_index ON tiles (
            zoom_level, 
            tile_column, 
            tile_row
        )",
        [],
    )?;
    Ok(())
}
pub fn create_tile_index ( tr : & Transaction ) -> rusqlite :: Result < ( ) > { tr . execute ( " " , [ ] , ) ? ; Ok ( ( ) ) }
Creates the optional `tile_index` index for fast tile data lookup.
Creates the optional ` tile_index ` index for fast tile data lookup .
tr
&Transaction