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Returns a querySchemaId that uniquely identifies an EDMquerySchema in the remote EDMdatabase.
Related functions: edmiRemoteGetQuery, edmiRemoteExecuteQuery, edmiRemoteExecuteQueryEx,
Header:
#include "sdai.h"
Prototype:
EdmiError edmiRemoteGetQuerySchema(SdaiServerContext serverContextId,
SdaiString schemaName,
SdaiString querySchemaName,
SdaiQuerySchema *querySchemaId,
SdaiInvocationId *edmiInvocationId);
Arguments:
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EdmiError edmiRemoteGetQuerySchema(SdaiServerContext serverContextId,
SdaiString schemaName,
SdaiString querySchemaName,
SdaiQuerySchema *querySchemaId,
SdaiInvocationId *edmiInvocationId);
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Returns a querySchemaId that uniquely identifies an EDMquerySchema in the remote EDMdatabase
Arguments
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| 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{_}the EDMdatabase. Express Schema names are case insensitive and unique within the scope of an _EDMdatabase_ .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_ .remote EDMdatabase |
| SdaiInvocationId | edmiInvocationId | Currently not used. |
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Return Value
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Options
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Example
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/* - -------------------------------------- |
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- File: c:/data/furniture. |
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exp - -------------------------------------- |
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SCHEMA Furniture TYPE tScrewType = ENUMERATION OF (PHILIPS, ALLEN, FLAT); END_TYPE; |
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ENTITY Screw; |
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Id : STRING; |
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Typ : tScrewType; |
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Len : REAL; |
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Dia : REAL; |
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END_ENTITY; |
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ENTITY Dining_Table; |
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Name : STRING; |
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Legs : INTEGER; |
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Len : REAL; |
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Width : REAL; |
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Height : REAL; |
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Screws : BAG OF Screw; |
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END_ENTITY; |
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END_SCHEMA; |
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- --------------------------------------- |
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- File: c:/data/furniture_query. |
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qex - --------------------------------------- |
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QUERY_SCHEMA Furniture_Query FOR Furniture; |
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GLOBAL DECLARE src INSTANCE OF Furniture; END_GLOBAL; |
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VIEW_ENTITY View_Table; |
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Name : STRING; |
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Area : REAL; |
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END_VIEW_ENTITY; |
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QUERY_FUNCTION Dining_Table_Area (Area : REAL) : SET OF View_Table; |
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LOCAL result : SET of View_Table; |
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currView : View_Table; |
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table_area : REAL; |
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END_LOCAL; |
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FROM(sdt:src::Dining_Table) |
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WHEN TRUE; |
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BEGIN table_area := sdt.Len*sdt.Width; |
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IF(table_area > Area |
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) THEN NEW currView; currView.Name := sdt.Name; |
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currView.Area := table_area; |
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result ++ currView; |
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END_IF; |
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END; |
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RETURN(result); |
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END_QUERY_FUNCTION; |
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END_QUERY_SCHEMA; |
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*/ |
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EdmiError rstat; |
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SdaiInteger nErr, nWrn; |
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SdaiServerContext myContext; |
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SdaiQuerySchema qexSchemaId; |
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SdaiQuery queryId; |
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/* Define Remote Server Context */ |
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rstat = edmiDefineServerContext("MyRemoteServerContext", |
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"Johnny", "Supervisor", "cf37ftr", |
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"TCP", "9090", "MyServerHost", |
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NULL, NULL, NULL, NULL, NULL, &myContext); |
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/* Compile the Express Schema */ |
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rstat = edmiRemoteDefineSchema(myContext, EXPRESS_SCHEMA_TYPE, |
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"c:/data/furniture.exp", "c:/temp/furniture.dia", |
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"Furniture", 0, &nWrn, &nErr, NULL); |
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/* Compile the Query Schema */ |
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rstat = edmiRemoteDefineSchema(myContext, QUERY_SCHEMA_TYPE, |
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"c:/data/furniture_query.qex", "c:/temp/furniture_query.dia", |
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"Furniture_Query", 0, &nWrn, &nErr, NULL); |
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/* Get the Query Schema Id */ |
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rstat = edmiRemoteGetQuerySchema(myContext, "Furniture", |
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"Furniture_Query", &qexSchemaId, NULL); |
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printf("\nQuery Schema Id = %d", qexSchemaId); |
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/* Get the Query Function Id */ |
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rstat = edmiRemoteGetQuery(myContext, "Furniture", |
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"Furniture_Query", "Dining_Table_Area", |
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&queryId, NULL); |
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printf("\nQuery Function Id = %d", queryId); |
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. . . |
See also
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