issue-1292: sql projection test case

This commit adds a unit test demonstrating the issue described
in delta-io#1292.

rust/tests/data/http_requests/_delta_log/00000000000000000000.json

@@ -0,0 +1,3 @@
+{"commitInfo":{"delta-rs":"0.9.0","timestamp":1681604880998}}
+{"protocol":{"minReaderVersion":1,"minWriterVersion":1}}
+{"metaData":{"id":"1c863a88-7231-4ffc-a24b-3bbfad87d80a","name":"http_requests","description":"","format":{"provider":"parquet","options":{}},"schemaString":"{\"type\":\"struct\",\"fields\":[{\"name\":\"date\",\"type\":\"string\",\"nullable\":true,\"metadata\":{}},{\"name\":\"ClientIP\",\"type\":\"string\",\"nullable\":true,\"metadata\":{}},{\"name\":\"ClientRequestHost\",\"type\":\"string\",\"nullable\":true,\"metadata\":{}},{\"name\":\"ClientRequestMethod\",\"type\":\"string\",\"nullable\":true,\"metadata\":{}},{\"name\":\"ClientRequestURI\",\"type\":\"string\",\"nullable\":true,\"metadata\":{}},{\"name\":\"EdgeEndTimestamp\",\"type\":\"timestamp\",\"nullable\":true,\"metadata\":{}},{\"name\":\"EdgeResponseBytes\",\"type\":\"long\",\"nullable\":true,\"metadata\":{}},{\"name\":\"EdgeResponseStatus\",\"type\":\"short\",\"nullable\":true,\"metadata\":{}},{\"name\":\"EdgeStartTimestamp\",\"type\":\"timestamp\",\"nullable\":true,\"metadata\":{}}]}","partitionColumns":["date"],"createdTime":1681604880998,"configuration":{}}}

rust/tests/data/http_requests/_delta_log/00000000000000000001.json

@@ -0,0 +1,3 @@
+{"add":{"path":"date=2023-04-14/part-00000-731ab1b3-85a8-4bc3-92e5-96347fe3fd84-c000.snappy.parquet","size":5976,"partitionValues":{"date":"2023-04-14"},"modificationTime":1681604881837,"dataChange":true,"stats":"{\"numRecords\":1437,\"minValues\":{\"EdgeEndTimestamp\":\"2023-04-14T00:00:00.000Z\",\"ClientRequestHost\":\"example.com\",\"EdgeResponseStatus\":200,\"ClientRequestMethod\":\"GET\",\"EdgeStartTimestamp\":\"2023-04-14T00:00:00.000Z\",\"ClientIP\":\"127.0.0.1\",\"ClientRequestURI\":\"/\",\"EdgeResponseBytes\":303},\"maxValues\":{\"EdgeResponseBytes\":307,\"ClientRequestURI\":\"/\",\"EdgeResponseStatus\":200,\"EdgeStartTimestamp\":\"2023-04-14T00:00:45.000Z\",\"ClientIP\":\"127.0.0.1\",\"ClientRequestHost\":\"example.com\",\"ClientRequestMethod\":\"GET\",\"EdgeEndTimestamp\":\"2023-04-14T00:00:45.000Z\"},\"nullCount\":{\"ClientRequestHost\":0,\"ClientRequestURI\":0,\"ClientRequestMethod\":0,\"EdgeResponseStatus\":0,\"ClientIP\":0,\"EdgeEndTimestamp\":0,\"EdgeResponseBytes\":0,\"EdgeStartTimestamp\":0}}","tags":null}}
+{"add":{"path":"date=2023-04-13/part-00000-e853fe2e-6f42-450c-8af1-4145b73a96c7-c000.snappy.parquet","size":3780,"partitionValues":{"date":"2023-04-13"},"modificationTime":1681604881849,"dataChange":true,"stats":"{\"numRecords\":144,\"minValues\":{\"EdgeStartTimestamp\":\"2023-04-13T23:58:58.000Z\",\"ClientRequestMethod\":\"GET\",\"ClientIP\":\"127.0.0.1\",\"EdgeEndTimestamp\":\"2023-04-13T23:58:58.000Z\",\"ClientRequestURI\":\"/\",\"ClientRequestHost\":\"example.com\",\"EdgeResponseBytes\":303,\"EdgeResponseStatus\":200},\"maxValues\":{\"ClientRequestHost\":\"example.com\",\"ClientRequestURI\":\"/\",\"ClientIP\":\"127.0.0.1\",\"EdgeResponseStatus\":200,\"ClientRequestMethod\":\"GET\",\"EdgeStartTimestamp\":\"2023-04-13T23:59:59.000Z\",\"EdgeEndTimestamp\":\"2023-04-14T00:00:00.000Z\",\"EdgeResponseBytes\":307},\"nullCount\":{\"ClientRequestMethod\":0,\"ClientIP\":0,\"EdgeResponseStatus\":0,\"ClientRequestURI\":0,\"EdgeEndTimestamp\":0,\"EdgeStartTimestamp\":0,\"EdgeResponseBytes\":0,\"ClientRequestHost\":0}}","tags":null}}
+{"commitInfo":{"timestamp":1681604881849,"clientVersion":"delta-rs.0.9.0"}}

rust/tests/datafusion_test.rs

@@ -11,15 +11,15 @@ use arrow::datatypes::{
 use arrow::record_batch::RecordBatch;
 use common::datafusion::context_with_delta_table_factory;
 use datafusion::assert_batches_sorted_eq;
-use datafusion::datasource::TableProvider;
+use datafusion::datasource::{TableProvider};
 use datafusion::execution::context::{SessionContext, SessionState, TaskContext};
 use datafusion::physical_plan::coalesce_partitions::CoalescePartitionsExec;
 use datafusion::physical_plan::{common::collect, file_format::ParquetExec, metrics::Label};
 use datafusion::physical_plan::{visit_execution_plan, ExecutionPlan, ExecutionPlanVisitor};
 use datafusion_common::scalar::ScalarValue;
 use datafusion_common::ScalarValue::*;
 use datafusion_common::{DataFusionError, Result};
-use datafusion_expr::Expr;
+use datafusion_expr::{Expr};
 use datafusion_proto::bytes::{
     physical_plan_from_bytes_with_extension_codec, physical_plan_to_bytes_with_extension_codec,
 };
@@ -763,3 +763,30 @@ async fn test_datafusion_scan_timestamps() -> Result<()> {
 
     Ok(())
 }
+
+#[tokio::test]
+async fn test_datafusion_sql_projection() -> Result<()> {
+    let ctx = SessionContext::new();
+    let table = deltalake::open_table("./tests/data/http_requests")
+        .await
+        .unwrap();
+    ctx.register_table("http_requests", Arc::new(table))?;
+
+    let batches = ctx.sql("SELECT \"ClientRequestURI\" FROM http_requests LIMIT 5").await?.collect().await?;
+
+    let expected = vec![
+        "+------------------+",
+        "| ClientRequestURI |",
+        "+------------------+",
+        "| /                |",
+        "| /                |",
+        "| /                |",
+        "| /                |",
+        "| /                |",
+        "+------------------+",
+    ];
+
+    assert_batches_sorted_eq!(&expected, &batches);
+
+    Ok(())
+}