edmiGetMethodSignatureId

EdmiError edmiGetMethodSignatureId(SdaiString   methodType
                                    SdaiString   methodName,
                                    SdaiString   schemaName
                                    SdaiInstance *methodId);

Returns the instance of EDM_METHOD in the ExpressDataManager model that describes a given method. A method is either an Express-X Schema Map or a query function.

Arguments

Type	Name	Comment
SdaiString	methodType	"XPX" if the method is an Express-X Schema Map. "QEX" if the method is a query function.
SdaiString	methodName	If the method is an Express-X Schema Map, this shall be the method name that was assigned to the method when it was defined with edmiDefineMethodSignature. If the method is a query function, the method name shall be the name of the query function it self.
SdaiString	schemaName	If the method is an Express-X Schema Map, this variable shall be the name of the mapping schema. E.g "MySchemaMap". If the method is a query function, this variable shall be the name of the query schema containing the query in question, qualified with the name of the parent Express schema.
SdaiInstance	methodId	Variable that will receive the instance Id of the method. This is an instance of the EDM_METHOD entity in the ExpressDataManager model

Return Value

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Options

Example

 EdmiError rstat;
 SdaiInteger nErr, nWrn;
 SdaiInstance qexMethodId;
  
 /* Define Schemas */ 
 rstat = edmiDefineSchema("c:/data/person.exp",
 "c:/temp/person.dia",
 "Person", 0, &nWrn, &nErr);
 rstat = edmiDefineQuerySchema("c:/data/person_queries.qex",
 "c:/data/person_queries.dia", 
 0, &nWrn, &nErr); 
  
 /* Get Signature Ids */
 rstat = edmiGetMethodSignatureId("QEX", "SexHeavierThan",
 "Person.Queries", &qexMethodId); 
 . . .
  
 Express Schema
 - --------------------------------------------------------------
 - File : c:/data/person.exp
 - --------------------------------------------------------------
 SCHEMA person;
 ENTITY aperson;
 name : STRING;
 sex : STRING;
 weight : REAL;
 END_ENTITY;
 END_SCHEMA;
  
 Query Schema.
 - --------------------------------------------------------------
 - File : c:/data/person_queries.qex
 - --------------------------------------------------------------
 QUERY_SCHEMA queries FOR person;
 GLOBAL
 DECLARE src INSTANCE OF person;
 END_GLOBAL;
  
 VIEW_ENTITY PersonView;
 name : STRING;
 sex : INTEGER;
 weight : REAL;
 END_VIEW_ENTITY;
 QUERY_FUNCTION SexHeavierThan ( p_sex:INTEGER; p_weight:REAL)
 : SET OF PersonView;
 LOCAL
 result : SET of PersonView;
 currView : PersonView;
 END_LOCAL;
  
 FROM(s:src::aperson)
 WHEN TRUE;
 BEGIN
 IF((s.sex = p_sex) AND (s.weight > p_weight)) THEN
 NEW currView;
 currView.name := s.name;
 currView.sex := s.sex;
 currView.weight := s.weight;
 result ++ currView;
 END_IF;
 END;
 RETURN(result);
 END_QUERY_FUNCTION;
 END_QUERY_SCHEMA;

EDMsix

edmiGetMethodSignatureId

Arguments

Return Value

Options

Example

See also

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