Document SPI_push() and SPI_pop().

doc/src/sgml/spi.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/spi.sgml,v 1.32 2004/03/05 01:00:45 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/spi.sgml,v 1.33 2004/03/17 01:05:10 momjian Exp $
 -->
 
 <chapter id="spi">
@@ -199,6 +199,68 @@ int SPI_finish(void)
 
 <!-- *********************************************** -->
 
+<refentry id="spi-spi-push">
+ <refmeta>
+  <refentrytitle>SPI_push</refentrytitle>
+ </refmeta>
+
+ <refnamediv>
+  <refname>SPI_push</refname>
+  <refpurpose>pushes SPI stack to allow recursive SPI calls</refpurpose>
+ </refnamediv>
+
+ <indexterm><primary>SPI_push</primary></indexterm>
+
+ <refsynopsisdiv>
+<synopsis>
+void SPI_push(void)
+</synopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+  <title>Description</title>
+
+  <para>
+   <function>SPI_push</function> pushes a new environment on to the 
+   SPI call stack, allowing recursive calls to use a new environment.
+  </para>
+ </refsect1>
+
+</refentry>
+
+<!-- *********************************************** -->
+
+<refentry id="spi-spi-pop">
+ <refmeta>
+  <refentrytitle>SPI_pop</refentrytitle>
+ </refmeta>
+
+ <refnamediv>
+  <refname>SPI_pop</refname>
+  <refpurpose>pops SPI stack to allow recursive SPI calls</refpurpose>
+ </refnamediv>
+
+ <indexterm><primary>SPI_pop</primary></indexterm>
+
+ <refsynopsisdiv>
+<synopsis>
+void SPI_pop(void)
+</synopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+  <title>Description</title>
+
+  <para>
+   <function>SPI_pop</function> pops the previous environment from the 
+   SPI call stack.  For use when returning from recursive SPI calls.
+  </para>
+ </refsect1>
+
+</refentry>
+
+<!-- *********************************************** -->
+
 <refentry id="spi-spi-exec">
  <refmeta>
   <refentrytitle>SPI_exec</refentrytitle>

src/backend/executor/spi.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.110 2004/03/05 00:47:01 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.111 2004/03/17 01:05:10 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -201,12 +201,14 @@ AtEOXact_SPI(bool isCommit)
 	SPI_tuptable = NULL;
 }
 
+/* Pushes SPI stack to allow recursive SPI calls */
 void
 SPI_push(void)
 {
 	_SPI_curid++;
 }
 
+/* Pops SPI stack to allow recursive SPI calls */
 void
 SPI_pop(void)
 {

src/include/executor/spi.h

@@ -2,7 +2,7 @@
  *
  * spi.h
  *
- * $PostgreSQL: pgsql/src/include/executor/spi.h,v 1.42 2004/03/05 00:47:01 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/executor/spi.h,v 1.43 2004/03/17 01:05:10 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */