aboutsummaryrefslogtreecommitdiff
path: root/src/test/examples/testlibpq2.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/test/examples/testlibpq2.c')
-rw-r--r--src/test/examples/testlibpq2.c142
1 files changed, 78 insertions, 64 deletions
diff --git a/src/test/examples/testlibpq2.c b/src/test/examples/testlibpq2.c
index 801feec9bc8..d38ea1e906e 100644
--- a/src/test/examples/testlibpq2.c
+++ b/src/test/examples/testlibpq2.c
@@ -1,6 +1,6 @@
/*
* testlibpq2.c
- * Test of the asynchronous notification interface
+ * Test of the asynchronous notification interface
*
populate a database with the following:
@@ -21,73 +21,87 @@ INSERT INTO TBL1 values (10);
#include <stdio.h>
#include "libpq-fe.h"
-void exit_nicely(PGconn* conn)
+void
+exit_nicely(PGconn * conn)
{
- PQfinish(conn);
- exit(1);
+ PQfinish(conn);
+ exit(1);
}
main()
{
- char *pghost, *pgport, *pgoptions, *pgtty;
- char* dbName;
- int nFields;
- int i,j;
-
- PGconn* conn;
- PGresult* res;
- PGnotify* notify;
-
- /* begin, by setting the parameters for a backend connection
- if the parameters are null, then the system will try to use
- reasonable defaults by looking up environment variables
- or, failing that, using hardwired constants */
- pghost = NULL; /* host name of the backend server */
- pgport = NULL; /* port of the backend server */
- pgoptions = NULL; /* special options to start up the backend server */
- pgtty = NULL; /* debugging tty for the backend server */
- dbName = getenv("USER"); /* change this to the name of your test database*/
-
- /* make a connection to the database */
- conn = PQsetdb(pghost, pgport, pgoptions, pgtty, dbName);
-
- /* check to see that the backend connection was successfully made */
- if (PQstatus(conn) == CONNECTION_BAD) {
- fprintf(stderr,"Connection to database '%s' failed.\n", dbName);
- fprintf(stderr,"%s",PQerrorMessage(conn));
- exit_nicely(conn);
- }
-
- res = PQexec(conn, "LISTEN TBL2");
- if (PQresultStatus(res) != PGRES_COMMAND_OK) {
- fprintf(stderr,"LISTEN command failed\n");
- PQclear(res);
- exit_nicely(conn);
- }
- /* should PQclear PGresult whenever it is no longer needed to avoid
- memory leaks */
- PQclear(res);
-
- while (1) {
- /* async notification only come back as a result of a query*/
- /* we can send empty queries */
- res = PQexec(conn, " ");
-/* printf("res->status = %s\n", pgresStatus[PQresultStatus(res)]); */
- /* check for asynchronous returns */
- notify = PQnotifies(conn);
- if (notify) {
- fprintf(stderr,
- "ASYNC NOTIFY of '%s' from backend pid '%d' received\n",
- notify->relname, notify->be_pid);
- free(notify);
- break;
- }
- PQclear(res);
- }
-
- /* close the connection to the database and cleanup */
- PQfinish(conn);
+ char *pghost,
+ *pgport,
+ *pgoptions,
+ *pgtty;
+ char *dbName;
+ int nFields;
+ int i,
+ j;
+
+ PGconn *conn;
+ PGresult *res;
+ PGnotify *notify;
+
+ /*
+ * begin, by setting the parameters for a backend connection if the
+ * parameters are null, then the system will try to use reasonable
+ * defaults by looking up environment variables or, failing that,
+ * using hardwired constants
+ */
+ pghost = NULL; /* host name of the backend server */
+ pgport = NULL; /* port of the backend server */
+ pgoptions = NULL; /* special options to start up the backend
+ * server */
+ pgtty = NULL; /* debugging tty for the backend server */
+ dbName = getenv("USER"); /* change this to the name of your test
+ * database */
+
+ /* make a connection to the database */
+ conn = PQsetdb(pghost, pgport, pgoptions, pgtty, dbName);
+
+ /* check to see that the backend connection was successfully made */
+ if (PQstatus(conn) == CONNECTION_BAD)
+ {
+ fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
+ fprintf(stderr, "%s", PQerrorMessage(conn));
+ exit_nicely(conn);
+ }
+
+ res = PQexec(conn, "LISTEN TBL2");
+ if (PQresultStatus(res) != PGRES_COMMAND_OK)
+ {
+ fprintf(stderr, "LISTEN command failed\n");
+ PQclear(res);
+ exit_nicely(conn);
+ }
+
+ /*
+ * should PQclear PGresult whenever it is no longer needed to avoid
+ * memory leaks
+ */
+ PQclear(res);
+
+ while (1)
+ {
+ /* async notification only come back as a result of a query */
+ /* we can send empty queries */
+ res = PQexec(conn, " ");
+/* printf("res->status = %s\n", pgresStatus[PQresultStatus(res)]); */
+ /* check for asynchronous returns */
+ notify = PQnotifies(conn);
+ if (notify)
+ {
+ fprintf(stderr,
+ "ASYNC NOTIFY of '%s' from backend pid '%d' received\n",
+ notify->relname, notify->be_pid);
+ free(notify);
+ break;
+ }
+ PQclear(res);
+ }
+
+ /* close the connection to the database and cleanup */
+ PQfinish(conn);
}
-
-