move column, dfschema, etc. to common module

Author: jimexist

datafusion-common/Cargo.toml

@@ -42,3 +42,4 @@ parquet = { version = "8.0.0", features = ["arrow"] }
 avro-rs = { version = "0.13", features = ["snappy"], optional = true }
 pyo3 = { version = "0.15", optional = true }
 sqlparser = "0.13"
+ordered-float = "2.10"

datafusion-common/src/error.rs

@@ -26,10 +26,6 @@ use arrow::error::ArrowError;
 #[cfg(feature = "avro")]
 use avro_rs::Error as AvroError;
 use parquet::errors::ParquetError;
-#[cfg(feature = "pyarrow")]
-use pyo3::exceptions::PyException;
-#[cfg(feature = "pyarrow")]
-use pyo3::prelude::PyErr;
 use sqlparser::parser::ParserError;
 
 /// Result type for operations that could result in an [DataFusionError]
@@ -87,13 +83,6 @@ impl From<ArrowError> for DataFusionError {
     }
 }
 
-#[cfg(feature = "pyarrow")]
-impl From<DataFusionError> for PyErr {
-    fn from(err: DataFusionError) -> PyErr {
-        PyException::new_err(err.to_string())
-    }
-}
-
 impl From<DataFusionError> for ArrowError {
     fn from(e: DataFusionError) -> Self {
         match e {

datafusion-common/src/lib.rs

@@ -18,7 +18,13 @@
 mod column;
 mod dfschema;
 mod error;
+#[cfg(feature = "pyarrow")]
+mod pyarrow;
+mod scalar;
 
 pub use column::Column;
 pub use dfschema::{DFField, DFSchema, DFSchemaRef, ExprSchema, ToDFSchema};
 pub use error::{DataFusionError, Result};
+pub use scalar::{
+    ScalarType, ScalarValue, MAX_PRECISION_FOR_DECIMAL128, MAX_SCALE_FOR_DECIMAL128,
+};

datafusion/src/pyarrow.rs renamed to datafusion-common/src/pyarrow.rs

@@ -15,12 +15,21 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use pyo3::prelude::*;
+//! PyArrow
+
+use crate::{DataFusionError, ScalarValue};
+use arrow::array::ArrayData;
+use arrow::pyarrow::PyArrowConvert;
+use pyo3::exceptions::PyException;
+use pyo3::prelude::PyErr;
 use pyo3::types::PyList;
+use pyo3::{FromPyObject, IntoPy, PyAny, PyObject, PyResult, Python};
 
-use crate::arrow::array::ArrayData;
-use crate::arrow::pyarrow::PyArrowConvert;
-use crate::scalar::ScalarValue;
+impl From<DataFusionError> for PyErr {
+    fn from(err: DataFusionError) -> PyErr {
+        PyException::new_err(err.to_string())
+    }
+}
 
 impl PyArrowConvert for ScalarValue {
     fn from_pyarrow(value: &PyAny) -> PyResult<Self> {
@@ -68,7 +77,6 @@ mod tests {
     use pyo3::prepare_freethreaded_python;
     use pyo3::py_run;
     use pyo3::types::PyDict;
-    use pyo3::Python;
 
     fn init_python() {
         prepare_freethreaded_python();