tshauck commented on code in PR #324:
URL: https://github.com/apache/iceberg-rust/pull/324#discussion_r1561209884
##########
Cargo.toml:
##########
@@ -21,6 +21,7 @@ members = [
"crates/catalog/*",
"crates/examples",
"crates/iceberg",
+ "crates/integrations",
Review Comment:
Perhaps as a V2 of this integration it'd make sense to use features and/or
move the datafusion dep down into the integrations crate (or maybe have a crate
per integration).
To your point about polars or other extensions, if this concept grew the
dependency load would get challenging for folks who don't need it.
##########
crates/integrations/src/datafusion/schema.rs:
##########
@@ -0,0 +1,97 @@
+// 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.
+
+use std::{any::Any, sync::Arc};
+
+use dashmap::DashMap;
+use datafusion::{
+ catalog::schema::SchemaProvider, datasource::TableProvider,
error::DataFusionError,
+};
+use futures::FutureExt;
+use iceberg::{Catalog, NamespaceIdent, Result};
+
+use crate::datafusion::table::IcebergTableProvider;
+
+pub(crate) struct IcebergSchemaProvider {
+ tables: DashMap<String, Arc<dyn TableProvider>>,
+}
+
+impl IcebergSchemaProvider {
+ pub(crate) async fn try_new(
+ client: Arc<dyn Catalog>,
+ namespace: &NamespaceIdent,
+ ) -> Result<Self> {
+ let table_names: Vec<String> = client
+ .list_tables(namespace)
+ .await?
+ .iter()
+ .map(|t| t.name().to_owned())
+ .collect();
+
+ let mut tables = Vec::new();
+ for name in table_names {
+ let provider = IcebergTableProvider::try_new(client.clone(),
namespace, &name).await?;
+ let provider = Arc::new(provider) as Arc<dyn TableProvider>;
+
+ tables.push((name, provider));
+ }
+
+ Ok(IcebergSchemaProvider {
+ tables: tables.into_iter().collect(),
+ })
+ }
+}
+
+impl SchemaProvider for IcebergSchemaProvider {
Review Comment:
I realize these are just stubs, I'd be happy to help fill in the guts here
and for the `TableProvider` traits.
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