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DevOps-Bash-tools/hive_list_databases.sh

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#!/usr/bin/env bash
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2019-12-06 11:10:26 +0000 (Fri, 06 Dec 2019)
#
# https://github.com/HariSekhon/DevOps-Bash-tools
#
# License: see accompanying Hari Sekhon LICENSE file
#
# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
# https://www.linkedin.com/in/HariSekhon
#
set -euo pipefail
[ -n "${DEBUG:-}" ] && set -x
srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck disable=SC1090,SC1091
. "$srcdir/lib/utils.sh"
# shellcheck disable=SC2034,SC2154
usage_description="
List all Hive databases via beeline
Output Format:
<database_name>
FILTER environment variable will restrict to matching databases (if giving <db>.<table>, matches up to the first dot)
Tested on Hive 1.1.0 on CDH 5.10, 5.16
For a better version written in Python see DevOps Python tools repo:
https://github.com/HariSekhon/DevOps-Python-tools
you will need to comment out / remove '-o pipefail' below to skip errors if you aren't authorized to use
any of the databases to avoid the script exiting early upon encountering any authorization error such:
ERROR: AuthorizationException: User '<user>@<domain>' does not have privileges to access: default Default Hive database.*.*
"
# used by usage() in lib/utils.sh
# shellcheck disable=SC2034
usage_args="[<beeline_options>]"
help_usage "$@"
"$srcdir/beeline.sh" --silent=true --outputformat=tsv2 -e 'SHOW DATABASES' "$@" |
tail -n +2 |
# awk '{print $1}' |
while read -r db; do
if [ -n "${FILTER:-}" ] &&
! [[ "$db" =~ ${FILTER%%.*} ]]; then
continue
fi
printf '%s\n' "$db"
done