1 files changed, 71 insertions, 0 deletions
diff --git a/src/interfaces/libpq++/examples/testlibpq2.cc b/src/interfaces/libpq++/examples/testlibpq2.cc
new file mode 100644
index 00000000000..8eafea00b7a
--- /dev/null
+++ b/src/interfaces/libpq++/examples/testlibpq2.cc
@@ -0,0 +1,71 @@
+/*
+ * testlibpq2.cc
+ * 	Test of the asynchronous notification interface
+ *
+   populate a database with the following:
+
+CREATE TABLE TBL1 (i int4);
+
+CREATE TABLE TBL2 (i int4);
+
+CREATE RULE r1 AS ON INSERT TO TBL1 DO [INSERT INTO TBL2 values (new.i); NOTIFY TBL2];
+
+ * Then start up this program
+ * After the program has begun, do
+
+INSERT INTO TBL1 values (10);
+
+ *
+ *
+ */
+#include <stdio.h>
+#include "libpq++.H"
+
+main()
+{
+  char* dbName;
+  int nFields;
+  int i,j;
+
+  /* begin, by creating the parameter environtment for a backend
+     connection. When no parameters are given then the system will
+     try to use reasonable defaults by looking up environment variables 
+     or, failing that, using hardwired constants */
+  PGenv env;
+  PGdatabase* data;
+  PGnotify* notify;
+
+  dbName = getenv("USER"); /* change this to the name of your test database */
+
+  /* make a connection to the database */
+  data = new PGdatabase(&env, dbName);
+
+  /* check to see that the backend connection was successfully made */
+  if (data->status() == CONNECTION_BAD) {
+    fprintf(stderr,"Connection to database '%s' failed.\n", dbName);
+    fprintf(stderr,"%s",data->errormessage());
+    delete data;
+    exit(1);
+  }
+
+  if (data->exec("LISTEN TBL2") != PGRES_COMMAND_OK) {
+    fprintf(stderr,"LISTEN command failed\n");
+    delete data;
+    exit(1);
+  }
+
+  while (1) {
+      /* check for asynchronous returns */
+      notify = data->notifies();
+      if (notify) {
+	  fprintf(stderr,
+		  "ASYNC NOTIFY of '%s' from backend pid '%d' received\n",
+		  notify->relname, notify->be_pid);
+	  free(notify);
+	  break;
+      }
+  }
+      
+  /* close the connection to the database and cleanup */
+  delete data;
+}