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'\" t
.\" Title: SPI_execute_plan_extended
.\" Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 2023
.\" Manual: PostgreSQL 15.5 Documentation
.\" Source: PostgreSQL 15.5
.\" Language: English
.\"
.TH "SPI_EXECUTE_PLAN_EXTENDED" "3" "2023" "PostgreSQL 15.5" "PostgreSQL 15.5 Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
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.nh
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.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
SPI_execute_plan_extended \- execute a statement prepared by \fBSPI_prepare\fR
.SH "SYNOPSIS"
.sp
.nf
int SPI_execute_plan_extended(SPIPlanPtr \fIplan\fR,
const SPIExecuteOptions * \fIoptions\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_execute_plan_extended\fR
executes a statement prepared by
\fBSPI_prepare\fR
or one of its siblings\&. This function is equivalent to
\fBSPI_execute_plan\fR, except that information about the parameter values to be passed to the query is presented differently, and additional execution\-controlling options can be passed\&.
.PP
Query parameter values are represented by a
ParamListInfo
struct, which is convenient for passing down values that are already available in that format\&. Dynamic parameter sets can also be used, via hook functions specified in
ParamListInfo\&.
.PP
Also, instead of always accumulating the result tuples into a
\fISPI_tuptable\fR
structure, tuples can be passed to a caller\-supplied
DestReceiver
object as they are generated by the executor\&. This is particularly helpful for queries that might generate many tuples, since the data can be processed on\-the\-fly instead of being accumulated in memory\&.
.SH "ARGUMENTS"
.PP
SPIPlanPtr \fIplan\fR
.RS 4
prepared statement (returned by
\fBSPI_prepare\fR)
.RE
.PP
const SPIExecuteOptions * \fIoptions\fR
.RS 4
struct containing optional arguments
.RE
.PP
Callers should always zero out the entire
\fIoptions\fR
struct, then fill whichever fields they want to set\&. This ensures forward compatibility of code, since any fields that are added to the struct in future will be defined to behave backwards\-compatibly if they are zero\&. The currently available
\fIoptions\fR
fields are:
.PP
ParamListInfo \fIparams\fR
.RS 4
data structure containing query parameter types and values; NULL if none
.RE
.PP
bool \fIread_only\fR
.RS 4
true
for read\-only execution
.RE
.PP
bool \fIallow_nonatomic\fR
.RS 4
true
allows non\-atomic execution of CALL and DO statements
.RE
.PP
bool \fImust_return_tuples\fR
.RS 4
if
true, raise error if the query is not of a kind that returns tuples (this does not forbid the case where it happens to return zero tuples)
.RE
.PP
uint64 \fItcount\fR
.RS 4
maximum number of rows to return, or
0
for no limit
.RE
.PP
DestReceiver * \fIdest\fR
.RS 4
DestReceiver
object that will receive any tuples emitted by the query; if NULL, result tuples are accumulated into a
\fISPI_tuptable\fR
structure, as in
\fBSPI_execute_plan\fR
.RE
.PP
ResourceOwner \fIowner\fR
.RS 4
The resource owner that will hold a reference count on the plan while it is executed\&. If NULL, CurrentResourceOwner is used\&. Ignored for non\-saved plans, as SPI does not acquire reference counts on those\&.
.RE
.SH "RETURN VALUE"
.PP
The return value is the same as for
\fBSPI_execute_plan\fR\&.
.PP
When
\fIoptions\->dest\fR
is NULL,
\fISPI_processed\fR
and
\fISPI_tuptable\fR
are set as in
\fBSPI_execute_plan\fR\&. When
\fIoptions\->dest\fR
is not NULL,
\fISPI_processed\fR
is set to zero and
\fISPI_tuptable\fR
is set to NULL\&. If a tuple count is required, the caller\*(Aqs
DestReceiver
object must calculate it\&.
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