> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/server-programming/spi/spi-interface/spi-spi-execute-with-args.md). # SPI\_execute\_with\_args ### SPI\_execute\_with\_args SPI\_execute\_with\_args — execute a command with out-of-line parameters ### Synopsis ``` int SPI_execute_with_args(const char *command, int nargs, Oid *argtypes, Datum *values, const char *nulls, bool read_only, long count) ``` ### Description `SPI_execute_with_args` executes a command that might include references to externally supplied parameters. The command text refers to a parameter as `$n`, and the call specifies data types and values for each such symbol. *`read_only`* and *`count`* have the same interpretation as in `SPI_execute`. The main advantage of this routine compared to `SPI_execute` is that data values can be inserted into the command without tedious quoting/escaping, and thus with much less risk of SQL-injection attacks. Similar results can be achieved with `SPI_prepare` followed by `SPI_execute_plan`; however, when using this function the query plan is always customized to the specific parameter values provided. For one-time query execution, this function should be preferred. 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. ### Arguments `const char * command` : command string `int nargs` : number of input parameters (`$1`, `$2`, etc.) `Oid * argtypes` : an array of length *`nargs`*, containing the OIDs of the data types of the parameters `Datum * values` : an array of length *`nargs`*, containing the actual parameter values `const char * nulls` : an array of length *`nargs`*, describing which parameters are null ``` If *`nulls`* is `NULL` then `SPI_execute_with_args` assumes that no parameters are null. Otherwise, each entry of the *`nulls`* array should be `' '` if the corresponding parameter value is non-null, or `'n'` if the corresponding parameter value is null. (In the latter case, the actual value in the corresponding *`values`* entry doesn't matter.) Note that *`nulls`* is not a text string, just an array: it does not need a `'\0'` terminator. ``` `bool read_only` : `true` for read-only execution `long count` : maximum number of rows to return, or `0` for no limit ### Return Value The return value is the same as for `SPI_execute`. `SPI_processed` and `SPI_tuptable` are set as in `SPI_execute` if successful. *** 原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/spi-spi-execute-with-args.html)（英文原文，待翻譯） --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.postgresql.tw/server-programming/spi/spi-interface/spi-spi-execute-with-args.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.