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-rw-r--r--doc/src/sgml/spi.sgml15
1 files changed, 9 insertions, 6 deletions
diff --git a/doc/src/sgml/spi.sgml b/doc/src/sgml/spi.sgml
index fca48caec04..d488c203d3d 100644
--- a/doc/src/sgml/spi.sgml
+++ b/doc/src/sgml/spi.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/spi.sgml,v 1.59 2007/09/14 04:18:27 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/spi.sgml,v 1.60 2008/02/12 04:09:44 tgl Exp $ -->
<chapter id="spi">
<title>Server Programming Interface</title>
@@ -1077,9 +1077,12 @@ bool SPI_is_cursor_plan(SPIPlanPtr <parameter>plan</parameter>)
<title>Return Value</title>
<para>
<symbol>true</symbol> or <symbol>false</symbol> to indicate if the
- <parameter>plan</parameter> can produce a cursor or not.
- If the <parameter>plan</parameter> is <symbol>NULL</symbol> or invalid,
- <varname>SPI_result</varname> is set to <symbol>SPI_ERROR_ARGUMENT</symbol>
+ <parameter>plan</parameter> can produce a cursor or not, with
+ <varname>SPI_result</varname> set to zero.
+ If it is not possible to determine the answer (for example,
+ if the <parameter>plan</parameter> is <symbol>NULL</symbol> or invalid,
+ or if called when not connected to SPI), then
+ <varname>SPI_result</varname> is set to a suitable error code
and <symbol>false</symbol> is returned.
</para>
</refsect1>
@@ -1442,8 +1445,8 @@ Portal SPI_cursor_open(const char * <parameter>name</parameter>, SPIPlanPtr <par
<title>Return Value</title>
<para>
- pointer to portal containing the cursor, or <symbol>NULL</symbol>
- on error
+ Pointer to portal containing the cursor. Note there is no error
+ return convention; any error will be reported via <function>elog</>.
</para>
</refsect1>
</refentry>