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| author | Bruce Momjian <bruce@momjian.us> | 2011-11-10 13:00:44 -0500 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2011-11-10 13:00:44 -0500 |
| commit | d5873b635989e0b780c1c9f07139dfebf0f5e546 (patch) | |
| tree | 1ab00f4fd4768e5e256fbe036f5d0ad84c5640a7 /doc/src | |
| parent | 2e02280726f5ca7a8e3c76e1491eaf5ab00fc8f4 (diff) | |
| download | postgresql-d5873b635989e0b780c1c9f07139dfebf0f5e546.tar.gz postgresql-d5873b635989e0b780c1c9f07139dfebf0f5e546.zip | |
Document that PQexec() can handle a NULL res pointer just fine.
Backpatch to 9.1.
Mark Hills
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/libpq.sgml | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml index f2f67e20ffd..3d5f98ba2a6 100644 --- a/doc/src/sgml/libpq.sgml +++ b/doc/src/sgml/libpq.sgml @@ -62,7 +62,7 @@ return a non-null object pointer, unless perhaps there is too little memory even to allocate the <structname>PGconn</> object. The <function>PQstatus</> function should be called to check - whether a connection was successfully made before queries are sent + the return value for a successful connection before queries are sent via the connection object. <warning> @@ -1754,8 +1754,10 @@ PGresult *PQexec(PGconn *conn, const char *command); Returns a <structname>PGresult</structname> pointer or possibly a null pointer. A non-null pointer will generally be returned except in out-of-memory conditions or serious errors such as inability to send - the command to the server. If a null pointer is returned, it should - be treated like a <symbol>PGRES_FATAL_ERROR</symbol> result. Use + the command to the server. The <function>PQresultStatus</> function + should be called to check the return value for any errors (including + the value of a null pointer, in which case it will return + <symbol>PGRES_FATAL_ERROR</symbol>). Use <function>PQerrorMessage</function> to get more information about such errors. </para> |