Adds support for COPY TO/FROM Azure Blob Storage

Supports following Azure Blob uri forms:
- `az://{container}/key`
- `azure://{container}/key`
- `https://{account}.blob.core.windows.net/{container}`

**Configuration**

The simplest way to configure object storage is by creating the standard [`~/.azure/config`](https://learn.microsoft.com/en-us/cli/azure/azure-cli-configuration?view=azure-cli-latest) file:

```bash
$ cat ~/.azure/config
[storage]
account = devstoreaccount1
key = Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==
```

Alternatively, you can use the following environment variables when starting postgres to configure the Azure Blob Storage client:
- `AZURE_STORAGE_ACCOUNT`: the storage account name of the Azure Blob
- `AZURE_STORAGE_KEY`: the storage key of the Azure Blob
- `AZURE_STORAGE_SAS_TOKEN`: the storage SAS token for the Azure Blob
- `AZURE_CONFIG_FILE`: an alternative location for the config file

**Bonus**
Additionally, PR supports following S3 uri forms:
- `s3://{bucket}/key`
- `s3a://{bucket}/key`
- `https://s3.amazonaws.com/{bucket}/key`
- `https://{bucket}.s3.amazonaws.com/key`

Closes #50

Author: aykut-bozkurt

.devcontainer/.env

@@ -6,6 +6,14 @@ AWS_S3_TEST_BUCKET=testbucket
 MINIO_ROOT_USER=minioadmin
 MINIO_ROOT_PASSWORD=minioadmin
 
+# Azure Blob tests
+AZURE_STORAGE_ACCOUNT=devstoreaccount1
+AZURE_STORAGE_KEY="Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw=="
+AZURE_STORAGE_CONNECTION_STRING="DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://localhost:10000/devstoreaccount1;"
+AZURE_TEST_CONTAINER_NAME=testcontainer
+AZURE_TEST_READ_ONLY_SAS="se=2100-05-05&sp=r&sv=2022-11-02&sr=c&sig=YMPFnAHKe9y0o3hFegncbwQTXtAyvsJEgPB2Ne1b9CQ%3D"
+AZURE_TEST_READ_WRITE_SAS="se=2100-05-05&sp=rcw&sv=2022-11-02&sr=c&sig=TPz2jEz0t9L651t6rTCQr%2BOjmJHkM76tnCGdcyttnlA%3D"
+
 # Others
 RUST_TEST_THREADS=1
 PG_PARQUET_TEST=true

.devcontainer/Dockerfile

@@ -12,6 +12,11 @@ RUN apt-get update && apt-get -y install build-essential libreadline-dev zlib1g-
                                          curl lsb-release ca-certificates gnupg sudo git \
                                          nano net-tools awscli
 
+# install azure-cli
+RUN curl -sL https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor | tee /etc/apt/keyrings/microsoft.gpg > /dev/null
+RUN echo "deb [arch=`dpkg --print-architecture` signed-by=/etc/apt/keyrings/microsoft.gpg] https://packages.microsoft.com/repos/azure-cli/ `lsb_release -cs` main" | tee /etc/apt/sources.list.d/azure-cli.list
+RUN apt-get update && apt-get install -y azure-cli
+
 # install Postgres
 RUN sh -c 'echo "deb https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
 RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -

.devcontainer/create-test-buckets.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
 aws --endpoint-url http://localhost:9000 s3 mb s3://$AWS_S3_TEST_BUCKET
+
+az storage container create -n $AZURE_TEST_CONTAINER_NAME --connection-string $AZURE_STORAGE_CONNECTION_STRING

.devcontainer/docker-compose.yml

@@ -10,13 +10,16 @@ services:
       - ${USERPROFILE}${HOME}/.ssh:/home/rust/.ssh:ro
       - ${USERPROFILE}${HOME}/.ssh/known_hosts:/home/rust/.ssh/known_hosts:rw
       - ${USERPROFILE}${HOME}/.gitconfig:/home/rust/.gitconfig:ro
-      - ${USERPROFILE}${HOME}/.aws:/home/rust/.aws:ro
+      - ${USERPROFILE}${HOME}/.aws:/home/rust/.aws:rw
+      - ${USERPROFILE}${HOME}/.azure:/home/rust/.azure:rw
+
     env_file:
       - .env
     cap_add:
       - SYS_PTRACE
     depends_on:
       - minio
+      - azurite
 
   minio:
     image: minio/minio
@@ -30,3 +33,15 @@ services:
       interval: 6s
       timeout: 2s
       retries: 3
+
+  azurite:
+    image: mcr.microsoft.com/azure-storage/azurite
+    env_file:
+      - .env
+    network_mode: host
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "http://localhost:10000"]
+      interval: 6s
+      timeout: 2s
+      retries: 3

.github/workflows/ci.yml

@@ -85,6 +85,11 @@ jobs:
                                   postgresql-client-${{ env.PG_MAJOR }} \
                                   libpq-dev
 
+      - name: Install azure-cli
+        run: |
+          curl -sL https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor | sudo tee /etc/apt/keyrings/microsoft.gpg > /dev/null
+          echo "deb [arch=`dpkg --print-architecture` signed-by=/etc/apt/keyrings/microsoft.gpg] https://packages.microsoft.com/repos/azure-cli/ `lsb_release -cs` main" | sudo tee /etc/apt/sources.list.d/azure-cli.list
+          sudo apt-get update && sudo apt-get install -y azure-cli
 
       - name: Install and configure pgrx
         run: |
@@ -116,6 +121,17 @@ jobs:
 
           aws --endpoint-url http://localhost:9000 s3 mb s3://$AWS_S3_TEST_BUCKET
 
+      - name: Start Azurite for Azure Blob Storage emulator tests
+        run: |
+          docker run -d --env-file .devcontainer/.env -p 10000:10000 mcr.microsoft.com/azure-storage/azurite
+
+          while ! nc -z localhost 10000; do
+            echo "Waiting for localhost:10000..."
+            sleep 1
+          done
+
+          az storage container create -n $AZURE_TEST_CONTAINER_NAME --connection-string $AZURE_STORAGE_CONNECTION_STRING
+
       - name: Run tests
         run: |
           # Run tests with coverage tool

Cargo.lock

@@ -26,7 +26,8 @@ arrow-schema = {version = "53", default-features = false}
 aws-config = { version = "1.5", default-features = false, features = ["rustls"]}
 aws-credential-types = {version = "1.2", default-features = false}
 futures = "0.3"
-object_store = {version = "0.11", default-features = false, features = ["aws"]}
+home = "0.5"
+object_store = {version = "0.11", default-features = false, features = ["aws", "azure"]}
 once_cell = "1"
 parquet = {version = "53", default-features = false, features = [
     "arrow",
@@ -38,6 +39,7 @@ parquet = {version = "53", default-features = false, features = [
     "object_store",
 ]}
 pgrx = "=0.12.8"
+rust-ini = "0.21"
 tokio = {version = "1", default-features = false, features = ["rt", "time", "macros"]}
 url = "2"
 

Cargo.toml

@@ -156,7 +156,13 @@ SELECT uri, encode(key, 'escape') as key, encode(value, 'escape') as value FROM
 ```
 
 ## Object Store Support
-`pg_parquet` supports reading and writing Parquet files from/to `S3` object store. Only the uris with `s3://` scheme is supported. 
+`pg_parquet` supports reading and writing Parquet files from/to `S3` and `Azure Blob Storage` object stores.
+
+> [!NOTE]
+> To be able to write into a object store location, you need to grant `parquet_object_store_write` role to your current postgres user.
+> Similarly, to read from an object store location, you need to grant `parquet_object_store_read` role to your current postgres user.
+
+#### S3 Storage
 
 The simplest way to configure object storage is by creating the standard `~/.aws/credentials` and `~/.aws/config` files:
 
@@ -179,9 +185,33 @@ Alternatively, you can use the following environment variables when starting pos
 - `AWS_CONFIG_FILE`: an alternative location for the config file
 - `AWS_PROFILE`: the name of the profile from the credentials and config file (default profile name is `default`)
 
-> [!NOTE]
-> To be able to write into a object store location, you need to grant `parquet_object_store_write` role to your current postgres user.
-> Similarly, to read from an object store location, you need to grant `parquet_object_store_read` role to your current postgres user.
+Supported S3 uri formats are shown below:
+- s3:// \<bucket\> / \<path\>
+- s3a:// \<bucket\> / \<path\>
+- https:// \<bucket\>.s3.amazonaws.com / \<path\>
+- https:// s3.amazonaws.com / \<bucket\> / \<path\>
+
+#### Azure Blob Storage
+
+The simplest way to configure object storage is by creating the standard [`~/.azure/config`](https://learn.microsoft.com/en-us/cli/azure/azure-cli-configuration?view=azure-cli-latest) file:
+
+```bash
+$ cat ~/.azure/config
+[storage]
+account = devstoreaccount1
+key = Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==
+```
+
+Alternatively, you can use the following environment variables when starting postgres to configure the Azure Blob Storage client:
+- `AZURE_STORAGE_ACCOUNT`: the storage account name of the Azure Blob
+- `AZURE_STORAGE_KEY`: the storage key of the Azure Blob
+- `AZURE_STORAGE_SAS_TOKEN`: the storage SAS token for the Azure Blob
+- `AZURE_CONFIG_FILE`: an alternative location for the config file
+
+Supported Azure Blob Storage uri formats are shown below:
+- az:// \<container\> / \<path\>
+- azure:// \<container\> / \<path\>
+- https:// \<account\>.blob.core.windows.net / \<container\>
 
 ## Copy Options
 `pg_parquet` supports the following options in the `COPY TO` command: