'\" t
.\"     Title: SPI_cursor_open_with_args
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2019
.\"    Manual: PostgreSQL 9.6.12 Documentation
.\"    Source: PostgreSQL 9.6.12
.\"  Language: English
.\"
.TH "SPI_CURSOR_OPEN_WITH_ARGS" "3" "2019" "PostgreSQL 9.6.12" "PostgreSQL 9.6.12 Documentation"
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.SH "NAME"
SPI_cursor_open_with_args \- set up a cursor using a query and parameters
.SH "SYNOPSIS"
.sp
.nf
Portal SPI_cursor_open_with_args(const char *\fIname\fR,
                                 const char *\fIcommand\fR,
                                 int \fInargs\fR, Oid *\fIargtypes\fR,
                                 Datum *\fIvalues\fR, const char *\fInulls\fR,
                                 bool \fIread_only\fR, int \fIcursorOptions\fR)
.fi
.SH "DESCRIPTION"
.PP
\fBSPI_cursor_open_with_args\fR
sets up a cursor (internally, a portal) that will execute the specified query\&. Most of the parameters have the same meanings as the corresponding parameters to
\fBSPI_prepare_cursor\fR
and
\fBSPI_cursor_open\fR\&.
.PP
For one\-time query execution, this function should be preferred over
\fBSPI_prepare_cursor\fR
followed by
\fBSPI_cursor_open\fR\&. If the same command is to be executed with many different parameters, either method might be faster, depending on the cost of re\-planning versus the benefit of custom plans\&.
.PP
The passed\-in parameter data will be copied into the cursor\*(Aqs portal, so it can be freed while the cursor still exists\&.
.SH "ARGUMENTS"
.PP
const char * \fIname\fR
.RS 4
name for portal, or
NULL
to let the system select a name
.RE
.PP
const char * \fIcommand\fR
.RS 4
command string
.RE
.PP
int \fInargs\fR
.RS 4
number of input parameters ($1,
$2, etc\&.)
.RE
.PP
Oid * \fIargtypes\fR
.RS 4
an array of length
\fInargs\fR, containing the
OIDs of the data types of the parameters
.RE
.PP
Datum * \fIvalues\fR
.RS 4
an array of length
\fInargs\fR, containing the actual parameter values
.RE
.PP
const char * \fInulls\fR
.RS 4
an array of length
\fInargs\fR, describing which parameters are null
.sp
If
\fInulls\fR
is
NULL
then
\fBSPI_cursor_open_with_args\fR
assumes that no parameters are null\&. Otherwise, each entry of the
\fInulls\fR
array should be
\*(Aq\ \&\*(Aq
if the corresponding parameter value is non\-null, or
\*(Aqn\*(Aq
if the corresponding parameter value is null\&. (In the latter case, the actual value in the corresponding
\fIvalues\fR
entry doesn\*(Aqt matter\&.) Note that
\fInulls\fR
is not a text string, just an array: it does not need a
\*(Aq\e0\*(Aq
terminator\&.
.RE
.PP
bool \fIread_only\fR
.RS 4
true
for read\-only execution
.RE
.PP
int \fIcursorOptions\fR
.RS 4
integer bit mask of cursor options; zero produces default behavior
.RE
.SH "RETURN VALUE"
.PP
Pointer to portal containing the cursor\&. Note there is no error return convention; any error will be reported via
\fBelog\fR\&.