add drivers-build README.md

google · Jul 21, 2023 · bd6b026 · bd6b026
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+# Overview
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+The docker/drivers-build directory contains a sample Dockerfile for packaging postgresql database JDBC driver to be used by spark-thriftserver as an external storage. See demonstration [docker compose file](../compose-controller-spark-sql-external-storage.yaml). 
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+ > This folder should be ignored during continuous integration tests.