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Diffstat (limited to 'doc/src/sgml/man3/SPI_execute_extended.3')
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diff --git a/doc/src/sgml/man3/SPI_execute_extended.3 b/doc/src/sgml/man3/SPI_execute_extended.3 new file mode 100644 index 0000000..4911e94 --- /dev/null +++ b/doc/src/sgml/man3/SPI_execute_extended.3 @@ -0,0 +1,144 @@ +'\" t +.\" Title: SPI_execute_extended +.\" Author: The PostgreSQL Global Development Group +.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> +.\" Date: 2023 +.\" Manual: PostgreSQL 15.4 Documentation +.\" Source: PostgreSQL 15.4 +.\" Language: English +.\" +.TH "SPI_EXECUTE_EXTENDED" "3" "2023" "PostgreSQL 15.4" "PostgreSQL 15.4 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 ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +SPI_execute_extended \- execute a command with out\-of\-line parameters +.SH "SYNOPSIS" +.sp +.nf +int SPI_execute_extended(const char *\fIcommand\fR, + const SPIExecuteOptions * \fIoptions\fR) +.fi +.SH "DESCRIPTION" +.PP +\fBSPI_execute_extended\fR +executes a command that might include references to externally supplied parameters\&. The command text refers to a parameter as +$\fIn\fR, and the +\fIoptions\->params\fR +object (if supplied) provides values and type information for each such symbol\&. Various execution options can be specified in the +\fIoptions\fR +struct, too\&. +.PP +The +\fIoptions\->params\fR +object should normally mark each parameter with the +PARAM_FLAG_CONST +flag, since a one\-shot plan is always used for the query\&. +.PP +If +\fIoptions\->dest\fR +is not NULL, then result tuples are passed to that object as they are generated by the executor, instead of being accumulated in +\fISPI_tuptable\fR\&. Using a caller\-supplied +DestReceiver +object 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 +const char * \fIcommand\fR +.RS 4 +command string +.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\fR +.RE +.PP +ResourceOwner \fIowner\fR +.RS 4 +This field is present for consistency with +\fBSPI_execute_plan_extended\fR, but it is ignored, since the plan used by +\fBSPI_execute_extended\fR +is never saved\&. +.RE +.SH "RETURN VALUE" +.PP +The return value is the same as for +\fBSPI_execute\fR\&. +.PP +When +\fIoptions\->dest\fR +is NULL, +\fISPI_processed\fR +and +\fISPI_tuptable\fR +are set as in +\fBSPI_execute\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\&. |