Merge branch 'main' into docs-adls-backend

crates/core/src/operations/transaction/mod.rs

@@ -83,7 +83,7 @@ use object_store::path::Path;
 use object_store::Error as ObjectStoreError;
 use serde_json::Value;
 
-use self::conflict_checker::{CommitConflictError, TransactionInfo, WinningCommitSummary};
+use self::conflict_checker::{TransactionInfo, WinningCommitSummary};
 use crate::checkpoints::{cleanup_expired_logs_for, create_checkpoint_for};
 use crate::errors::DeltaTableError;
 use crate::kernel::{
@@ -97,6 +97,7 @@ use crate::table::config::TableConfig;
 use crate::table::state::DeltaTableState;
 use crate::{crate_version, DeltaResult};
 
+pub use self::conflict_checker::CommitConflictError;
 pub use self::protocol::INSTANCE as PROTOCOL;
 
 #[cfg(test)]

docs/integrations/object-storage/gcs.md

@@ -0,0 +1,44 @@
+# GCS Storage Backend
+
+`delta-rs` offers native support for using Google Cloud Storage (GCS) as an object storage backend.
+
+You don’t need to install any extra dependencies to read/write Delta tables to GCS with engines that use `delta-rs`. You do need to configure your GCS access credentials correctly.
+
+## Using Application Default Credentials
+
+Application Default Credentials (ADC) is a strategy used by GCS to automatically find credentials based on the application environment.
+
+If you are working from your local machine and have ADC set up then you can read/write Delta tables from GCS directly, without having to pass your credentials explicitly.
+
+## Example: Write Delta tables to GCS with Polars
+
+Using Polars, you can write a Delta table to GCS like this:
+
+```python
+# create a toy dataframe
+import polars as pl
+df = pl.DataFrame({"foo": [1, 2, 3, 4, 5]})
+
+# define path
+table_path = "gs://bucket/delta-table"
+
+# write Delta to GCS
+df.write_delta(table_path)
+```
+
+## Passing GCS Credentials explicitly
+
+Alternatively, you can pass GCS credentials to your query engine explicitly.
+
+For Polars, you would do this using the `storage_options` keyword. This will forward your credentials to the `object store` library that Polars uses under the hood. Read the [Polars documentation](https://docs.pola.rs/api/python/stable/reference/api/polars.DataFrame.write_delta.html) and the [`object store` documentation](https://docs.rs/object_store/latest/object_store/gcp/enum.GoogleConfigKey.html#variants) for more information.
+
+## Delta Lake on GCS: Required permissions
+
+You will need the following permissions in your GCS account:
+
+- `storage.objects.create`
+- `storage.objects.delete` (only required for uploads that overwrite an existing object)
+- `storage.objects.get` (only required if you plan on using the Google Cloud CLI)
+- `storage.objects.list` (only required if you plan on using the Google Cloud CLI)
+
+For more information, see the [GCP documentation](https://cloud.google.com/storage/docs/uploading-objects)

docs/integrations/object-storage/s3-like.md

@@ -1,8 +1,8 @@
 # CloudFlare R2 & Minio
 
-`delta-rs` offers native support for using Cloudflare R2 and Minio's as storage backend. R2 and Minio support conditional puts, however we have to pass this flag into the storage options. See the example blow
+`delta-rs` offers native support for using Cloudflare R2 and Minio's as storage backend. R2 and Minio support conditional puts, however we have to pass this flag into the storage options. See the example below
 
-You don’t need to install any extra dependencies to red/write Delta tables to S3 with engines that use `delta-rs`. You do need to configure your AWS access credentials correctly.
+You don’t need to install any extra dependencies to read/write Delta tables to S3 with engines that use `delta-rs`. You do need to configure your AWS access credentials correctly.
 
 ## Passing S3 Credentials
 

docs/integrations/object-storage/s3.md

@@ -1,8 +1,8 @@
 # AWS S3 Storage Backend
 
-`delta-rs` offers native support for using AWS S3 as an objet storage backend.
+`delta-rs` offers native support for using AWS S3 as an object storage backend.
 
-You don’t need to install any extra dependencies to red/write Delta tables to S3 with engines that use `delta-rs`. You do need to configure your AWS access credentials correctly.
+You don’t need to install any extra dependencies to read/write Delta tables to S3 with engines that use `delta-rs`. You do need to configure your AWS access credentials correctly.
 
 ## Note for boto3 users