ColdFusion 9.0 Resources

cfprocparam

Description

Defines stored procedure parameters. This tag is nested within a cfstoredproc tag.

Syntax

<cfprocparam  
    CFSQLType = "parameter data type" 
    maxLength = "length" 
    null = "yes|no" 
    scale = "decimal places"  
    type = "in|out|inout" 
    value = "parameter value" 
    variable = "variable name">

Note: You can specify this tag’s attributes in an attributeCollection attribute whose value is a structure. Specify the structure name in the attributeCollection attribute and use the tag’s attribute names as structure keys.

History

ColdFusion MX:

The maxrows attribute is obsolete.
Changed the dbvarname attribute behavior: it is now ignored for all drivers. ColdFusion uses JDBC 2.2 and does not support named parameters.
Changed the maxLength attribute behavior: it now applies to IN and INOUT parameter values.

Attributes

Attribute	Req/Opt	Default	Description
`CFSQLType`	Required		SQL type to which the parameter (any type) is bound. ColdFusion supports the following values, where the last element of the name corresponds to the SQL data type. Different database systems might support different subsets of this list. For information on supported parameter types, see your DBMS documentation. `CF_SQL_BIGINT` `CF_SQL_BIT` `CF_SQL_BLOB` `CF_SQL_CHAR` `CF_SQL_CLOB` `CF_SQL_DATE` `CF_SQL_DECIMAL` `CF_SQL_DOUBLE` `CF_SQL_FLOAT` `CF_SQL_IDSTAMP` `CF_SQL_INTEGER` `CF_SQL_LONGVARCHAR` `CF_SQL_MONEY` `CF_SQL_MONEY4` `CF_SQL_NUMERIC` `CF_SQL_REAL` `CF_SQL_REFCURSOR` `CF_SQL_SMALLINT` `CF_SQL_TIME` `CF_SQL_TIMESTAMP` `CF_SQL_TINYINT` `CF_SQL_VARCHAR` For a mapping of ColdFusion SQL data types to JDBC data types, see `cfqueryparam`.
`maxLength`	Optional	0	Maximum length of a string or character IN or INOUT `value` attribute. A `maxLength` of 0 allows any length. The `maxLength` attribute is not required when specifying `type=out`.
`null`	Optional	`no`	Whether the parameter is passed in as a null value. Not used with OUT type parameters. `yes`: tag ignores the `value` attribute. `no`
scale	Optional	0	Number of decimal places in numeric parameter. A `scale` of 0 limits the value to an integer.
`type`	Optional	`in`	`in`: the parameter is used to send data to the database system only. Passes the parameter by value. `out`: the parameter is used to receive data from the database system only. Passes the parameter as a bound variable. `inout`: the parameter is used to send and receive data. Passes the parameter as a bound variable.
`value`	Required if `type="IN"`		Value that ColdFusion passes to the stored procedure. This is optional for `inout` parameters.
`variable`	Required if `type="OUT"` or `"INOUT"`		ColdFusion variable name; references the value that the output parameter has after the stored procedure is called. This is ignored for `in` parameters.

Usage

Use this tag to identify stored procedure parameters and their data types. Code one cfprocparam tag for each parameter. The parameters that you code vary based on parameter type and DBMS. ColdFusion supports both positional and named parameters. If you use positional parameters, you must code cfprocparam tags in the same order as the associated parameters in the stored procedure definition.

Output variables are stored in the ColdFusion variable specified by the variable attribute.

You cannot use the cfprocparam tag for Oracle 8 and 9 reference cursors. Instead, use the cfprocresult tag.

Example

The following examples list the equivalent Oracle and Microsoft SQL Server stored procedures that insert data into the database. The CFML to invoke either stored procedure is the same.

The following example shows the Oracle stored procedure:

CREATE OR REPLACE PROCEDURE Insert_Book ( 
    arg_Title Books.Title%type, 
    arg_Price Books.Price%type, 
    arg_PublishDate Books.PublishDate%type, 
    arg_BookID OUT Books.BookID%type) 
AS 
    num_BookID NUMBER; 
BEGIN 
    SELECT seq_Books.NEXTVAL 
    INTO num_BookID 
    FROM DUAL; 
 
    INSERT INTO 
        Books ( 
            BookID, 
            Title, 
            Price, 
            PublishDate ) 
    VALUES ( 
        num_BookID, 
        arg_Title, 
        arg_Price, 
        arg_PublishDate ); 
 
    arg_BookID := num_BookID; 
END; 
/

The following example shows the SQL Server stored procedure:

CREATE PROCEDURE Insert_Book ( 
    @arg_Title VARCHAR(255), 
    @arg_Price SMALLMONEY, 
    @arg_PublishDate DATETIME, 
    @arg_BookID INT OUT) 
AS 
BEGIN 
INSERT INTO 
    Books ( 
        Title, 
        Price, 
        PublishDate ) 
    VALUES ( 
        @arg_Title, 
        @arg_Price, 
        @arg_PublishDate ); 
 
    SELECT @arg_BookID = @@IDENTITY; 
END;

You use the following CFML code to call either stored procedure:

<cfset ds = "sqltst"> 
<!--- <cfset ds = "oratst"> ---> 
 
<!--- If submitting a new book, insert the record and display confirmation ---> 
<cfif isDefined("form.title")> 
    <cfstoredproc procedure="Insert_Book" datasource="#ds#"> 
        <cfprocparam cfsqltype="cf_sql_varchar" value="#form.title#"> 
        <cfprocparam cfsqltype="cf_sql_numeric" value="#form.price#"> 
        <cfprocparam cfsqltype="cf_sql_date" value="#form.price#"> 
        <cfprocparam cfsqltype="cf_sql_numeric" type="out" variable="bookId"> 
    </cfstoredproc> 
 
<cfoutput> 
    <h3>'#form.title#' inserted into database.The ID is #bookId#.</h3> 
</cfoutput> 
 
</cfif> 
<cfform action="#CGI.SCRIPT_NAME#" method="post"> 
    <h3>Insert a new book</h3> 
 
    Title:  
    <cfinput type="text" size="20" required="yes" name="title"/> 
    <br/> 
 
    Price:  
    <cfinput type="text" size="20" required="yes" name="price" validate="float"/> 
    <br/> 
 
    Publish Date:  
    <cfinput type="text" size="5" required="yes" name="publishDate" validate="date"/> 
    <br/> 
 
    <input type="submit" value="Insert Book"/> 
 
</cfform>