Add reindex utility to /contrib.
Shaun Thomas <sthomas@townnews.com>
This commit is contained in:
Bruce Momjian
parent
561dca3263
commit
485fc354e1
@ -149,6 +149,10 @@ pgcrypto -
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Cryptographic functions
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by Marko Kreen <marko@l-t.ee>
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reindex -
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Reindexes a database
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by Shaun Thomas <sthomas@townnews.com>
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pgstattuple -
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A function returns the percentage of "dead" tuples in a table
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by Tatsuo Ishii <t-ishii@sra.co.jp>
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9
contrib/reindex/README
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9
contrib/reindex/README
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@ -0,0 +1,9 @@
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reindex
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Indexes are known to grow over time. Being as vacuum doesn't slow or
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clean up after this growth, and there is no command to reindex all tables
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in a database, it made sense to construct this utility to do it.
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Shaun Thomas <sthomas@townnews.com>
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223
contrib/reindex/reindex
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223
contrib/reindex/reindex
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@ -0,0 +1,223 @@
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#!/bin/sh
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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# Package : reindexdb Version : $Revision: 1.1 $
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# Date : 05/08/2002 Author : Shaun Thomas
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# Req : psql, sh, perl, sed Type : Utility
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#
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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# Function Definitions
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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function usage()
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{
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echo "$CMDNAME reindexes a PostgreSQL database."
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echo
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echo "Usage:"
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echo " $CMDNAME [options] [dbname]"
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echo
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echo "Options:"
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echo " -h, --host=HOSTNAME Database server host"
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echo " -p, --port=PORT Database server port"
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echo " -U, --username=USERNAME Username to connect as"
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echo " -W, --password Prompt for password"
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echo " -d, --dbname=DBNAME Database to reindex"
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echo " -a, --all Reindex all databases"
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echo " -t, --table=TABLE Reindex specific table only"
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echo " -i, --index=INDEX Reindex specific index only"
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echo " -e, --echo Show the command being sent to the backend"
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echo " -q, --quiet Don't write any output"
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echo
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echo "Read the description of the SQL command REINDEX for details."
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echo
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exit 0
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}
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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# Program Body
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# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
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CMDNAME=`basename "$0"`
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PATHNAME=`echo $0 | sed "s,$CMDNAME\$,,"`
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# Try valliantly to get the location of psql, since you can't ever
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# really know where it has been placed. We'll start by trying the
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# path. If that fails, we'll try the directory where this script
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# resides. Then on to whereis, and finally locate. Wish us luck.
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if x=`psql -V 2>/dev/null | grep psql`; then
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PSQL='psql'
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elif [ -f ${PATHNAME}psql ]; then
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PSQL=${PATHNAME}psql;
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elif x=`whereis -b psql 2>/dev/null | sed 's/.* //'`; then
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PSQL=$x
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elif x=`locate -r bin/psql$ -n 1 2>/dev/null`; then
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PSQL=$x
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else
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echo "$CMDNAME: Could not find psql to talk to postgres installation."
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echo "Please make sure psql is in your path, or that this script is in"
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echo "the same directory as psql was installed."
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exit 1
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fi
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# Now, go through all of our command-line options and get each operation
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# we said we'd accept in the usage listing.
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while [ "$#" -gt 0 ]
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do
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# Show help.
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case "$1" in
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--help|-\?)
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usage
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exit 0
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;;
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# All of the following are postgres options. We can pass them on
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# directly, without interpreting them in any way. We don't care.
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# Anything that allows a space, we'll get the next *two* arguments
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# and make sure to pass those along.
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--host|-h|-p|--port|-U|--username)
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PSQLOPT="$PSQLOPT $1 $2"
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shift
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;;
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-h*|--host=*|-p*|--port=*|-U*|--username=*|-W|--password)
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PSQLOPT="$PSQLOPT $1"
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;;
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# From this point on, we're setting options that are required for
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# or only valid in This script. This includes which database(s) to
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# reindex, which tables, or which indexes, and so on.
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# Echoing. We'll *not* use this in queries we use to get lists.
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--echo|-e)
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ECHOOPT="-e"
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;;
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# Do not echo messages. We'll direct all output to /dev/null.
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--quiet|-q)
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ECHOOPT="$ECHOOPT -o /dev/null"
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quiet=1
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;;
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# Reindex all databases, all tables, all applicable indexes.
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--all|-a)
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alldb=1
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;;
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# Database to connect to, if not all of them.
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--dbname|-d)
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dbname="$2"
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shift
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;;
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-d*|--dbname=*)
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dbname=`echo $1 | perl -pn -e 's/^--?d(bname=)?//'`
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;;
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# Reindex specific Table. Disables index reindexing.
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--table|-t)
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table="$2"
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shift
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;;
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-t*|--table=*)
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table=`echo $1 | perl -pn -e 's/^--?t(able=)?//'`
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;;
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# Reindex specific index. Disables table reindexing.
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--index|-i)
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index="$2"
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shift
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;;
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-i*|--index=*)
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index=`echo $1 | perl -pn -e 's/^--?i(ndex=)?//'`
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;;
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# Yeah, no options? Whine, and show usage.
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-*)
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echo "$CMDNAME: invalid option: $1" 1>&2
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usage;
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exit 1
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;;
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# Finally, it's possible that the database name was just the last
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# unlabeled option. So, let's get that.
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*)
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dbname="$1"
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;;
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esac
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shift # Shift off each argument as we loop.
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done
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# Get a list of all databases we'll be using. This first case is if we
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# were asked to do all databases.
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if [ "$alldb" ]; then
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if [ "$dbname" ] || [ "$index" ] || [ "$table" ]; then
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echo "$CMDNAME: cannot reindex all databases and a specific database," 1>&2
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echo " table, or index at the same time." 1>&2
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exit 1
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fi
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# Execute a command to pull back all databases the user specified can
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# connect to. That's the list we'll be using. It's also why it's
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# a good idea for this to be a super-user.
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dbname=`$PSQL $PSQLOPT -q -t -A -d template1 -c 'SELECT datname FROM pg_database WHERE datallowconn'`
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# Ok, if it's not all databases, make sure at least one database is
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# specified before continuing.
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elif [ -z "$dbname" ]; then
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echo "$CMDNAME: missing required argument: database name" 1>&2
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usage;
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exit 1
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fi
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# No. We can't reindex a specific index and table at the same time.
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# Complain about this, and move on.
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if [ "$table" ] && [ "$index" ]; then
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echo "$CMDNAME: cannot reindex a specific table and a specific index" 1>&2
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echo "at the same time." 1>&2
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exit 1
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fi
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# If index was set, reindex that index.
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if [ "$index" ]; then
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$PSQL $PSQLOPT $ECHOOPT -c "REINDEX INDEX $index" -d $dbname
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# Ok, no index. Is there a specific table to reindex?
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elif [ "$table" ]; then
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$PSQL $PSQLOPT $ECHOOPT -c "REINDEX TABLE $table" -d $dbname
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# No specific table, no specific index, either we have a specific database,
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# or were told to do all databases. Do it!
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else
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sql="SELECT distinct tablename FROM pg_indexes WHERE tablename NOT LIKE 'pg_%'"
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for db in $dbname; do
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# Only print which database we're currently reindexing if not in
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# quiet mode, and we're doing more than one database.
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[ "$alldb" ] && [ -z "$quiet" ] && echo "Reindexing $db"
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# Ok, reindex every table in the database. Use the same method
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# we used to get a list of databases, and get a list of tables in this
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# database that we may reindex.
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tables=`$PSQL $PSQLOPT -q -t -A -d $db -c "$sql"`
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for tab in $tables; do
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$PSQL $PSQLOPT $ECHOOPT -c "REINDEX TABLE $tab" -d $db
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done
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done
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fi
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# If any of the commands we've executed above failed in any way, bail
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# out with an error.
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if [ "$?" -ne 0 ]; then
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echo "$CMDNAME: reindex $index $table $dbname failed" 1>&2
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exit 1
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fi
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exit 0
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