45 lines
1.0 KiB
Ruby
Executable File
45 lines
1.0 KiB
Ruby
Executable File
#! /usr/bin/env ruby
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#
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# original file src/test/examples/testlibpq2.c
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# Test of the asynchronous notification interface
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# CREATE TABLE TBL1 (i int4);
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# CREATE TABLE TBL2 (i int4);
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# CREATE RULE r1 AS ON INSERT TO TBL1 DO (INSERT INTO TBL2 values (new.i); \
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# NOTIFY TBL2);
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# Then start up this program
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# After the program has begun, do
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# INSERT INTO TBL1 values (10);
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require 'pg'
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def main
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pghost = nil
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pgport = nil
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pgoptions = nil
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pgtty = nil
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dbname = ENV['USER']
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begin
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conn = PG.connect(pghost,pgport,pgoptions,pgtty,dbname)
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rescue PGError
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printf(STDERR, "Connection to database '%s' failed.\n",dbname)
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exit(2)
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end
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begin
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res = conn.exec("LISTEN TBL2")
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rescue PGError
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printf(STDERR, "LISTEN command failed\n")
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exit(2)
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end
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res.clear
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while 1
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notify = conn.get_notify
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if (notify)
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printf(STDERR,"ASYNC NOTIFY '%s' from backend pid '%d' received\n",notify[0],notify[1])
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break
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end
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end
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end
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main
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