CFPROCPARAM | |
Description
Parameter information. This tag is nested within a cfstoredproc tag. |
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Category
Database manipulation tags | |
Syntax<cfprocparam type = "in" or "out" or "inout" variable = "variable name" dbVarName = "DB variable name" value = "parameter value" CFSQLType = "parameter datatype" maxLength = "length" scale = "decimal places" null = "Yes" or "No"> | |
See also
cfinsert, cfprocresult, cfquery, cfqueryparam, cfstoredproc, cftransaction, cfupdate
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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. The order in which you code cfprocparam tags depends on whether the stored procedure uses positional or named notation:
Output variables are scoped with the name of the variable attribute passed to the tag. CFML supports Oracle 8 Reference Cursor type, which passes a parameter by reference. Parameters that are passed this way can be allocated and deallocated from memory within the execution of one application. To use reference cursors in packages or stored procedures, use the cfprocresult tag. This causes Datadirect JDBC to put Oracle reference cursors into a result set. (You cannot use this method with Oracle's ThinClient JDBC drivers.) |
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Example
The following example shows how to invoke an Oracle 8 PL/SQL stored procedure. It makes use of Oracle 8 support of the Reference Cursor type. The following package, Foo_Data, houses a procedure refcurproc that declares output parameters as Reference Cursor:
The procedure declares one input parameter as an integer, and one output parameter as a two-byte char varying type. Before the cfstoredproc tag can call this procedure, it must be created, compiled, and bound in the RDBMS environment. CREATE OR REPLACE PACKAGE Foo_Data AS TYPE EmpTyp IS REF CURSOR RETURN Emp%ROWTYPE; TYPE DeptTyp IS REF CURSOR RETURN Dept%ROWTYPE; PROCEDURE refcurproc(pParam1 in out EmpTyp, pParam2 in out DeptTyp, pParam3 in integer, pParam4 out varchar2); END foo_data; CREATE OR REPLACE PACKAGE BODY Foo_Data AS PROCEDURE RefCurProc(pParam1 in out EmpTyp, pParam2 in out DeptTyp, pParam3 in integer, pParam4 out varchar2) IS BEGIN OPEN pParam1 FOR select * from emp; OPEN pParam2 FOR select * from dept; IF pParam3 = 1 THEN pParam4 : = 'hello'; ELSE pParam4 : = 'goodbye'; END IF; END RefCurProc; END Foo_Data; The following CFML example shows how to invoke the RefCurProc procedure using cfstoredproc, cfprocparam, and cfprocresult. <cfstoredproc procedure = "foo_data.refcurproc" dataSource = "oracle8i" username = "scott" password = "tiger" returnCode = "No"> <cfprocparam type = "Out" CFSQLType = "CF_SQL_REFCURSOR" variable = "param1"> <cfprocparam type = "Out" CFSQLType = "CF_SQL_REFCURSOR" variable = "param2"> <cfprocparam type = "IN" CFSQLType = "CF_SQL_INTEGER" value = "1"> <cfprocparam type = "OUT" CFSQLType = "CF_SQL_VARCHAR" variable = "FOO"> <cfprocresult name = "rs1"> <cfprocresult name = "rs2" resultSet = "2"> </cfstoredproc> <b>The first result set:</b><br> <hr> <cftable query = "rs1" colHeaders HTMLTable border = "1"> <cfcol header = "EMPNO" text = "#EMPNO#"> <cfcol header = "EMPLOYEE name" text = "#ENAME#"> <cfcol header = "JOB" text = "#JOB#"> <cfcol header = "SALARY" text = "#SAL#"> <cfcol header = "DEPT NUMBER" text = "#DEPTNO#"> </cftable> <hr> <b>The second result set:</b><br> <cftable query = "rs2" colHeaders HTMLTable border = "1"> <cfcol header = "DEPT name" text = "#DNAME#"> <cfcol header = "DEPT NUMBER" text = "#DEPTNO#"> </cftable> <hr> <cfoutput> <b>The output parameter is:</b>'#FOO#' </cfoutput> |
TYPE | |
Optional | |
Default value: "in"
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VARIABLE | |
Required if type = "OUT" or "INOUT" | |
ColdFusion variable name; references the value that the output parameter has after the stored procedure is called. |
DBVARNAME | |
Required for named notation | |
Parameter name that corresponds to the name of the parameter in the stored procedure. |
VALUE | |
Required if type = "OUT" or "INOUT" | |
Value that corresponds to the value that ColdFusion passes to the stored procedure. |
CFSQLTYPE | |
Required | |
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MAXLENGTH | |
Optional | |
Default value: "0"
Maximum length of parameter. |
SCALE | |
Optional | |
Default value: "0"
Number of decimal places in parameter. |
NULL | |
Optional | |
Default value: "No"
Whether parameter is passed as a null value.
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