main.R

# Copyright 2026 Columnar Technologies Inc.
#
# Licensed 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.

library(adbcdrivermanager)

drv <- adbc_driver("redshift")

db <- adbc_database_init(
  drv,

  uri = "postgresql://localhost:5439", # for Redshift Serverless with bastion host
  #uri = "postgresql://localhost:5440", # for Redshift Provisioned with bastion host
  #uri = "postgresql://<cluster hostname>:<cluster port>", # for direct connection

  redshift.cluster_type = "redshift-serverless", # for Redshift Serverless
  #redshift.cluster_type = "redshift-iam", # for Redshift Provisioned with IAM auth
  #redshift.cluster_type = "redshift", # for Redshift Provisioned with user/password auth

  redshift.workgroup_name = "<WORKGROUP_NAME>", # for Redshift Serverless
  #redshift.cluster_identifier = "<CLUSTER IDENTIFIER>", # for Redshift Provisioned

  redshift.db_name = "sample_data_dev"
)

con <- adbc_connection_init(db)

con |>
  read_adbc(
    "
    SELECT
      l_partkey,
      SUM(l_quantity) as total_ordered
    FROM tpch.lineitem
    GROUP BY l_partkey
    ORDER BY total_ordered DESC
    LIMIT 5;
  "
  ) |>
  tibble::as_tibble() # or:
# arrow::as_arrow_table() # to keep result in Arrow format
# arrow::as_record_batch_reader() # for larger results