Mercurial > gemma
view schema/update-db.sh @ 4161:64cd18281c76
Improve performance of row level security policies
Using constraint_column_usage instead of key_column_usage makes
the query twice as fast. I did not explore why. Let's just take it.
Using 'EXISTS(... WHERE ... = value) is often more efficient than
value IN(...) since it allows the inner query to be executed only
up to the point where it turns out to return more than nothing with
filtering directly in place.
author | Tom Gottfried <tom@intevation.de> |
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date | Fri, 02 Aug 2019 17:14:13 +0200 |
parents | 5c0a99b56b2a |
children | c1fa4cf8a3f4 |
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#!/bin/bash -e # This is Free Software under GNU Affero General Public License v >= 3.0 # without warranty, see README.md and license for details. # # SPDX-License-Identifier: AGPL-3.0-or-later # License-Filename: LICENSES/AGPL-3.0.txt # # Copyright (C) 2019 by via donau # – Österreichische Wasserstraßen-Gesellschaft mbH # Software engineering by Intevation GmbH # # Author(s): # * Sascha Wilde <wilde@intevation.de> ME=`basename "$0"` BASEDIR=`dirname "$0"` usage() { cat <<EOF $ME [OPTION]... Options: -d, --db=NAME update the database NAME. Default: "gemma" -p, --port=PORT connect do the postgresql cluster at PORT. Default is the postgresql standard port 5432 --help display this help and exit EOF } fatal() { echo >&2 "$1" exit 23 } genpw() # $1 - length { PW='' until [ "$(grep '[^[:alnum:]]' <<<$PW)" -a "$(grep '[[:digit:]]' <<<$PW)" ] do PW=$(dd count=1 if=/dev/urandom 2>/dev/null \ | tr -cd '[:alnum:],._!?-' | tail -c "$1") done echo "$PW" } # Defaults: db=gemma port=5432 # Parse options: OPTS=`getopt \ -l help,db:,port: \ -o d:p: -n "$ME" -- "$@"` [ $? -eq 0 ] || { usage ; exit 1 ; } eval set -- "$OPTS" while true ; do case "$1" in --db|-d) db="$2" shift 2 ;; --port|-p) port="$2" shift 2 ;; --help) { usage ; exit 0 ; } ;; --) shift break ;; esac done get_version() { local ver if ver=$( psql -qtA -p "$port" -d "$db" \ -c 'SELECT get_schema_version()' 2>/dev/null ) then echo ${ver:--1} else echo '-1' fi } # Main ------------------------------------------------------------ current_ver=$( get_version ) for d in "$BASEDIR"/updates/* ; do new_ver=$( basename $d ) if [ -d "$d" ] && [ "$new_ver" -gt $current_ver ] ; then echo "Running updates for $new_ver ..." file_args="" for f in "$d"/* ; do file_args+=" -f $f" done psql -1qv ON_ERROR_STOP= -p "$port" -d "$db" $file_args \ -c "INSERT INTO gemma_schema_version(version) VALUES ($new_ver)" fi done