postgres/src/bin/scripts/createlang.sh

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#!/bin/sh
#-------------------------------------------------------------------------
#
# createlang.sh--
# Install a procedural language in a database
#
# Copyright (c) 1994, Regents of the University of California
#
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/createlang.sh,v 1.5 2000/01/12 19:36:36 petere Exp $
#
#-------------------------------------------------------------------------
CMDNAME=`basename $0`
PSQLOPT=
dbname=
langname=
echo=
list=
# Check for echo -n vs echo \c
if echo '\c' | grep -s c >/dev/null 2>&1
then
ECHO_N="echo -n"
ECHO_C=""
else
ECHO_N="echo"
ECHO_C='\c'
fi
# ----------
# Get options, language name and dbname
# ----------
while [ $# -gt 0 ]
do
case "$1" in
--help|-\?)
usage=t
break
;;
--list|-l)
list=t
;;
# options passed on to psql
--host|-h)
PSQLOPT="$PSQLOPT -h $2"
shift;;
-h*)
PSQLOPT="$PSQLOPT $1"
;;
--host=*)
PSQLOPT="$PSQLOPT -h "`echo $1 | sed 's/^--host=//'`
;;
--port|-p)
PSQLOPT="$PSQLOPT -p $2"
shift;;
-p*)
PSQLOPT="$PSQLOPT $1"
;;
--port=*)
PSQLOPT="$PSQLOPT -p "`echo $1 | sed 's/^--port=//'`
;;
--user|--username|-U)
PSQLOPT="$PSQLOPT -U '$2'"
shift;;
-U*)
PSQLOPT="$PSQLOPT $1"
;;
--user=*)
PSQLOPT="$PSQLOPT -U "`echo $1 | sed 's/^--user=//'`
;;
--username=*)
PSQLOPT="$PSQLOPT -U "`echo $1 | sed 's/^--username=//'`
;;
--password|-W)
PSQLOPT="$PSQLOPT -W"
;;
--echo|-e)
echo=t
;;
--dbname|--database|-d)
dbname="$2"
shift;;
-d*)
dbname=`echo $1 | sed 's/^-d//'`
;;
--dbname=*)
dbname=`echo $1 | sed 's/^--dbname=//'`
;;
--database=*)
dbname=`echo $1 | sed 's/^--database=//'`
;;
# misc options
--pglib|-L)
PGLIB="$2"
shift;;
-L*)
PGLIB=`echo $1 | sed 's/^-L//'`
;;
--pglib=*)
PGLIB=`echo $1 | sed 's/^--pglib=//'`
;;
-*)
echo "$CMDNAME: unrecognized option: $1"
echo "Try -? for help."
exit 1
;;
*)
langname="$1"
if [ "$2" ]; then
shift
dbname="$1"
fi
;;
esac
shift
done
if [ "$usage" ]; then
echo ""
echo "Usage: $CMDNAME [options] [langname [dbname]]"
echo ""
echo " -h, --host=HOSTNAME Database server host"
echo " -p, --port=PORT Database server port"
echo " -U, --username=USERNAME Username to connect as"
echo " -W, --password Prompt for password"
echo " -d, --dbname=DBNAME Database to install language in"
echo " -e, --echo Create some output about what is happening"
echo " -L, --pglib=PGLIB Find language interpreter in directory PGLIB"
echo " -l, --list Show a list of currently installed languages"
exit 0
fi
if [ "$list" ]; then
psql $PSQLOPT -d "$dbname" -c "SELECT lanname, lanpltrusted, lancompiler FROM pg_language WHERE lanispl = 't'"
exit $?
fi
# ----------
# Check that we have a database
# ----------
if [ -z "$dbname" ]; then
echo "$CMDNAME: missing required argument database name"
echo "Try -? for help."
exit 1
fi
# ----------
# Check that we have PGLIB
# ----------
if [ -z "$PGLIB" ]; then
echo "$CMDNAME: missing required argument PGLIB directory"
echo "(This is the directory where the interpreter for the procedural"
echo "language is stored. Traditionally, these are installed in whatever"
echo "'lib' directory was specified at configure time.)"
exit 1
fi
# ----------
# If not given on the command line, ask for the language
# ----------
if [ -z "$langname" ]; then
$ECHO_N "Language to install in database $dbname: "$ECHO_C
read langname
fi
# ----------
# Check if supported and set related values
# ----------
case "$langname" in
plpgsql)
lancomp="PL/pgSQL"
trusted="TRUSTED "
handler="plpgsql_call_handler"
;;
pltcl)
lancomp="PL/Tcl"
trusted="TRUSTED "
handler="pltcl_call_handler";;
*)
echo "$CMDNAME: unsupported language '$langname'"
echo "Supported languages are 'plpgsql' and 'pltcl'."
exit 1
;;
esac
# ----------
# Check that the shared object for the call handler is installed
# in PGLIB
# ----------
if [ ! -f $PGLIB/${langname}__DLSUFFIX__ ]; then
echo "$CMDNAME: cannot find the file $PGLIB/${langname}__DLSUFFIX__"
echo ""
echo "This file contains the call handler for $lancomp. By default,"
echo "only PL/pgSQL is built and installed; other languages must be"
echo "explicitly enabled at configure time."
echo ""
echo "To install PL/Tcl, make sure the option --with-tcl is given to"
echo "configure, then recompile and install."
exit 1
fi
if [ "$echo" ]; then
PSQLOPT="$PSQLOPT -e"
else
PSQLOPT="$PSQLOPT -q"
fi
PSQL="psql -A -t $PSQLOPT -d $dbname -c"
# ----------
# Make sure the language isn't already installed
# ----------
res=`$PSQL "SELECT oid FROM pg_language WHERE lanname = '$langname'"`
if [ $? -ne 0 ]; then
echo "$CMDNAME: external error"
exit 1
fi
if [ "$res" ]; then
echo "$CMDNAME: '$langname' is already installed in database $dbname"
exit 1
fi
# ----------
# Check that there is no function named as the call handler
# ----------
res=`$PSQL "SELECT oid FROM pg_proc WHERE proname = '$handler'"`
if [ ! -z "$res" ]; then
echo "$CMDNAME: A function named '$handler' already exists. Installation aborted."
exit 1
fi
# ----------
# Create the call handler and the language
# ----------
$PSQL "CREATE FUNCTION $handler () RETURNS OPAQUE AS '$PGLIB/${langname}__DLSUFFIX__' LANGUAGE 'C'"
if [ $? -ne 0 ]; then
echo "$CMDNAME: language installation failed"
exit 1
fi
$PSQL "CREATE ${trusted}PROCEDURAL LANGUAGE '$langname' HANDLER $handler LANCOMPILER '$lancomp'"
if [ $? -ne 0 ]; then
echo "$CMDNAME: language installation failed"
exit 1
fi
exit 0