1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
pub mod cast;
mod column;
pub mod config;
pub mod delta;
mod dfschema;
mod error;
pub mod from_slice;
pub mod parsers;
#[cfg(feature = "pyarrow")]
mod pyarrow;
pub mod scalar;
mod schema_reference;
pub mod stats;
mod table_reference;
pub mod test_util;
pub mod tree_node;
pub mod utils;
pub use column::Column;
pub use dfschema::{DFField, DFSchema, DFSchemaRef, ExprSchema, ToDFSchema};
pub use error::{
field_not_found, unqualified_field_not_found, DataFusionError, Result, SchemaError,
SharedResult,
};
pub use scalar::{ScalarType, ScalarValue};
pub use schema_reference::{OwnedSchemaReference, SchemaReference};
pub use stats::{ColumnStatistics, Statistics};
pub use table_reference::{OwnedTableReference, ResolvedTableReference, TableReference};
/// Downcast an Arrow Array to a concrete type, return an `DataFusionError::Internal` if the cast is
/// not possible. In normal usage of DataFusion the downcast should always succeed.
///
/// Example: `let array = downcast_value!(values, Int32Array)`
#[macro_export]
macro_rules! downcast_value {
($Value: expr, $Type: ident) => {{
use std::any::type_name;
$Value.as_any().downcast_ref::<$Type>().ok_or_else(|| {
DataFusionError::Internal(format!(
"could not cast value to {}",
type_name::<$Type>()
))
})?
}};
($Value: expr, $Type: ident, $T: tt) => {{
use std::any::type_name;
$Value.as_any().downcast_ref::<$Type<$T>>().ok_or_else(|| {
DataFusionError::Internal(format!(
"could not cast value to {}",
type_name::<$Type<$T>>()
))
})?
}};
}