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Add res checking to libpq examples, from Dan Merillat.

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This commit is contained in:
Bruce Momjian
1999-04-17 17:18:41 +00:00
parent 1b9f24c878
commit 00a4196139
2 changed files with 15 additions and 15 deletions
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14
doc/src/sgml/libpq.sgml
View File

@ -1600,7 +1600,7 @@ main()
/* start a transaction block */ /* start a transaction block */
res = PQexec(conn, "BEGIN"); res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "BEGIN command failed\n"); fprintf(stderr, "BEGIN command failed\n");
PQclear(res); PQclear(res);
@ -1618,7 +1618,7 @@ main()
* databases * databases
*/ */
res = PQexec(conn, "DECLARE mycursor CURSOR FOR select * from pg_database"); res = PQexec(conn, "DECLARE mycursor CURSOR FOR select * from pg_database");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "DECLARE CURSOR command failed\n"); fprintf(stderr, "DECLARE CURSOR command failed\n");
PQclear(res); PQclear(res);
@ -1626,7 +1626,7 @@ main()
} }
PQclear(res); PQclear(res);
res = PQexec(conn, "FETCH ALL in mycursor"); res = PQexec(conn, "FETCH ALL in mycursor");
if (PQresultStatus(res) != PGRES_TUPLES_OK) if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{ {
fprintf(stderr, "FETCH ALL command didn't return tuples properly\n"); fprintf(stderr, "FETCH ALL command didn't return tuples properly\n");
PQclear(res); PQclear(res);
@ -1742,7 +1742,7 @@ main()
} }
res = PQexec(conn, "LISTEN TBL2"); res = PQexec(conn, "LISTEN TBL2");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "LISTEN command failed\n"); fprintf(stderr, "LISTEN command failed\n");
PQclear(res); PQclear(res);
@ -1871,7 +1871,7 @@ main()
/* start a transaction block */ /* start a transaction block */
res = PQexec(conn, "BEGIN"); res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "BEGIN command failed\n"); fprintf(stderr, "BEGIN command failed\n");
PQclear(res); PQclear(res);
@ -1889,7 +1889,7 @@ main()
* databases * databases
*/ */
res = PQexec(conn, "DECLARE mycursor BINARY CURSOR FOR select * from test1"); res = PQexec(conn, "DECLARE mycursor BINARY CURSOR FOR select * from test1");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "DECLARE CURSOR command failed\n"); fprintf(stderr, "DECLARE CURSOR command failed\n");
PQclear(res); PQclear(res);
@ -1898,7 +1898,7 @@ main()
PQclear(res); PQclear(res);
res = PQexec(conn, "FETCH ALL in mycursor"); res = PQexec(conn, "FETCH ALL in mycursor");
if (PQresultStatus(res) != PGRES_TUPLES_OK) if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{ {
fprintf(stderr, "FETCH ALL command didn't return tuples properly\n"); fprintf(stderr, "FETCH ALL command didn't return tuples properly\n");
PQclear(res); PQclear(res);

16
src/man/libpq.3
View File

@ -1,6 +1,6 @@
.\" This is -*-nroff-*- .\" This is -*-nroff-*-
.\" XXX standard disclaimer belongs here.... .\" XXX standard disclaimer belongs here....
.\" $Header: /cvsroot/pgsql/src/man/Attic/libpq.3,v 1.25 1998/10/14 05:31:50 momjian Exp $ .\" $Header: /cvsroot/pgsql/src/man/Attic/libpq.3,v 1.26 1999/04/17 17:18:41 momjian Exp $
.TH LIBPQ INTRO 08/08/98 PostgreSQL PostgreSQL .TH LIBPQ INTRO 08/08/98 PostgreSQL PostgreSQL
.SH DESCRIPTION .SH DESCRIPTION
Current documentation for this topic is available in the new Programmer's Guide Current documentation for this topic is available in the new Programmer's Guide
@ -975,7 +975,7 @@ main()
/* start a transaction block */ /* start a transaction block */
res = PQexec(conn, "BEGIN"); res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "BEGIN command failed\\n"); fprintf(stderr, "BEGIN command failed\\n");
PQclear(res); PQclear(res);
@ -993,7 +993,7 @@ main()
* databases * databases
*/ */
res = PQexec(conn, "DECLARE mycursor CURSOR FOR select * from pg_database"); res = PQexec(conn, "DECLARE mycursor CURSOR FOR select * from pg_database");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "DECLARE CURSOR command failed\\n"); fprintf(stderr, "DECLARE CURSOR command failed\\n");
PQclear(res); PQclear(res);
@ -1002,7 +1002,7 @@ main()
PQclear(res); PQclear(res);
res = PQexec(conn, "FETCH ALL in mycursor"); res = PQexec(conn, "FETCH ALL in mycursor");
if (PQresultStatus(res) != PGRES_TUPLES_OK) if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{ {
fprintf(stderr, "FETCH ALL command didn't return tuples properly\\n"); fprintf(stderr, "FETCH ALL command didn't return tuples properly\\n");
PQclear(res); PQclear(res);
@ -1115,7 +1115,7 @@ main()
} }
res = PQexec(conn, "LISTEN TBL2"); res = PQexec(conn, "LISTEN TBL2");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "LISTEN command failed\\n"); fprintf(stderr, "LISTEN command failed\\n");
PQclear(res); PQclear(res);
@ -1239,7 +1239,7 @@ main()
/* start a transaction block */ /* start a transaction block */
res = PQexec(conn, "BEGIN"); res = PQexec(conn, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "BEGIN command failed\\n"); fprintf(stderr, "BEGIN command failed\\n");
PQclear(res); PQclear(res);
@ -1257,7 +1257,7 @@ main()
* databases * databases
*/ */
res = PQexec(conn, "DECLARE mycursor BINARY CURSOR FOR select * from test1"); res = PQexec(conn, "DECLARE mycursor BINARY CURSOR FOR select * from test1");
if (PQresultStatus(res) != PGRES_COMMAND_OK) if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
{ {
fprintf(stderr, "DECLARE CURSOR command failed\\n"); fprintf(stderr, "DECLARE CURSOR command failed\\n");
PQclear(res); PQclear(res);
@ -1266,7 +1266,7 @@ main()
PQclear(res); PQclear(res);
res = PQexec(conn, "FETCH ALL in mycursor"); res = PQexec(conn, "FETCH ALL in mycursor");
if (PQresultStatus(res) != PGRES_TUPLES_OK) if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
{ {
fprintf(stderr, "FETCH ALL command didn't return tuples properly\\n"); fprintf(stderr, "FETCH ALL command didn't return tuples properly\\n");
PQclear(res); PQclear(res);