IPC writer: take owned schema

examples/ipc_file_mmap.rs

@@ -27,8 +27,12 @@ fn write(
 ) -> Result<Vec<u8>, Error> {
     let result = vec![];
     let options = arrow2::io::ipc::write::WriteOptions { compression };
-    let mut writer =
-        arrow2::io::ipc::write::FileWriter::try_new(result, schema, ipc_fields.clone(), options)?;
+    let mut writer = arrow2::io::ipc::write::FileWriter::try_new(
+        result,
+        schema.clone(),
+        ipc_fields.clone(),
+        options,
+    )?;
     for chunk in chunks {
         writer.write(chunk, ipc_fields.as_ref().map(|x| x.as_ref()))?;
     }

src/io/ipc/write/writer.rs

@@ -47,11 +47,11 @@ impl<W: Write> FileWriter<W> {
     /// Creates a new [`FileWriter`] and writes the header to `writer`
     pub fn try_new(
         writer: W,
-        schema: &Schema,
+        schema: Schema,
         ipc_fields: Option<Vec<IpcField>>,
         options: WriteOptions,
     ) -> Result<Self> {
-        let mut slf = Self::new(writer, schema.clone(), ipc_fields, options);
+        let mut slf = Self::new(writer, schema, ipc_fields, options);
         slf.start()?;
 
         Ok(slf)

tests/it/io/ipc/write/file.rs

@@ -18,7 +18,7 @@ pub(crate) fn write(
 ) -> Result<Vec<u8>> {
     let result = vec![];
     let options = WriteOptions { compression };
-    let mut writer = FileWriter::try_new(result, schema, ipc_fields.clone(), options)?;
+    let mut writer = FileWriter::try_new(result, schema.clone(), ipc_fields.clone(), options)?;
     for batch in batches {
         writer.write(batch, ipc_fields.as_ref().map(|x| x.as_ref()))?;
     }