Function scan_empty

datafusion/core/src/test_util/mod.rs:66–75

Scan an empty data source, mainly used in tests

(
    name: Option<&str>,
    table_schema: &Schema,
    projection: Option<Vec<usize>>,
)

/// Scan an empty data source, mainly used in tests
pub fn scan_empty(
    name: Option<&str>,
    table_schema: &Schema,
    projection: Option<Vec<usize>>,
) -> Result<LogicalPlanBuilder> {
    let table_schema = Arc::new(table_schema.clone());
    let provider = Arc::new(EmptyTable::new(table_schema));
    let name = TableReference::bare(name.unwrap_or(UNNAMED_TABLE));
    LogicalPlanBuilder::scan(name, provider_as_source(provider), projection)
}

/// Scan an empty data source with configured partition, mainly used in tests.
pub fn scan_empty_with_partitions(