edmiRemoteGetQuerySchema

EdmiError edmiRemoteGetQuerySchema(SdaiServerContext serverContextId,
                                    SdaiString        schemaName,
                                    SdaiString        querySchemaName,
                                    SdaiQuerySchema   *querySchemaId,
                                    SdaiInvocationId  *edmiInvocationId);

Returns a querySchemaId that uniquely identifies an EDMquerySchema in the remote EDMdatabase

Arguments

Type	Name	Comment
SdaiServerContext	serverContextId	Context identification, from edmiDefineServerContext
SdaiString	schemaName	The name of the Express Schema for which the Query Schema has been compiled. This Express Schema must be compiled to form a dictionary model in the EDMdatabase. Express Schema names are case insensitive and unique within the scope of an EDMdatabase
SdaiString	querySchemaName	The name of the Query Schema for which to retrieve its unique querySchemaId. Query Schema names are case insensitive and unique within the scope of an Express Schema.
SdaiQuerySchema	querySchemaId	A variable that will receive the numeric querySchemaID that uniquely identifies the Query Schema instance in the remote EDMdatabase
SdaiInvocationId	edmiInvocationId	Currently not used.

Return Value

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Options

Example

 /*
 - -------------------------------------- 
 - File: c:/data/furniture.exp 
 - -------------------------------------- 
 SCHEMA Furniture 
 TYPE tScrewType = ENUMERATION OF (PHILIPS, ALLEN, FLAT); END_TYPE; 
 ENTITY Screw; 
 Id : STRING; 
 Typ : tScrewType; 
 Len : REAL; 
 Dia : REAL; 
 END_ENTITY; 
 ENTITY Dining_Table; 
 Name : STRING; 
 Legs : INTEGER; 
 Len : REAL; 
 Width : REAL; 
 Height : REAL; 
 Screws : BAG OF Screw; 
 END_ENTITY; 
 END_SCHEMA; 
  
 - --------------------------------------- 
 - File: c:/data/furniture_query.qex 
 - --------------------------------------- 
 QUERY_SCHEMA Furniture_Query FOR Furniture; 
 GLOBAL 
 DECLARE src INSTANCE OF Furniture;  
 END_GLOBAL; 
  
 VIEW_ENTITY View_Table; 
 Name : STRING; 
 Area : REAL; 
 END_VIEW_ENTITY; 
  
 QUERY_FUNCTION Dining_Table_Area (Area : REAL) : SET OF View_Table; 
 LOCAL 
 result : SET of View_Table; 
 currView : View_Table; 
 table_area : REAL; 
 END_LOCAL; 
 FROM(sdt:src::Dining_Table) 
 WHEN TRUE; 
 BEGIN 
 table_area := sdt.Len*sdt.Width; 
 IF(table_area > Area ) THEN 
 NEW currView; 
 currView.Name := sdt.Name; 
 currView.Area := table_area; 
 result ++ currView; 
 END_IF; 
 END; 
 RETURN(result); 
 END_QUERY_FUNCTION;  
 END_QUERY_SCHEMA; 
 */
 EdmiError rstat;
 SdaiInteger nErr, nWrn;
 SdaiServerContext myContext;
 SdaiQuerySchema qexSchemaId;
 SdaiQuery queryId;
  
 /* Define Remote Server Context */
 rstat = edmiDefineServerContext("MyRemoteServerContext",
 "Johnny", "Supervisor", "cf37ftr", 
 "TCP", "9090", "MyServerHost", 
 NULL, NULL, NULL, NULL, NULL, &myContext); 
  
 /* Compile the Express Schema */
 rstat = edmiRemoteDefineSchema(myContext, EXPRESS_SCHEMA_TYPE,
 "c:/data/furniture.exp", "c:/temp/furniture.dia",  
 "Furniture", 0, &nWrn, &nErr, NULL); 
  
 /* Compile the Query Schema */
 rstat = edmiRemoteDefineSchema(myContext, QUERY_SCHEMA_TYPE,
 "c:/data/furniture_query.qex", "c:/temp/furniture_query.dia", 
 "Furniture_Query", 0, &nWrn, &nErr, NULL); 
  
 /* Get the Query Schema Id */
 rstat = edmiRemoteGetQuerySchema(myContext, "Furniture",
 "Furniture_Query", &qexSchemaId, NULL); 
 printf("\nQuery Schema Id = %d", qexSchemaId);
  
 /* Get the Query Function Id */
 rstat = edmiRemoteGetQuery(myContext, "Furniture",
 "Furniture_Query", "Dining_Table_Area",  
 &queryId, NULL); 
 printf("\nQuery Function Id = %d", queryId);
 . . .

EDMsix

edmiRemoteGetQuerySchema

Arguments

Return Value

Options

Example

See also

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