internal static DbExpression CompileFunctionView(
string viewDef,
StorageMappingItemCollection mappingItemCollection,
ParserOptions.CompilationMode compilationMode,
IEnumerable<DbParameterReferenceExpression> parameters)
{
Debug.Assert(!String.IsNullOrEmpty(viewDef), "!String.IsNullOrEmpty(viewDef)");
Debug.Assert(mappingItemCollection != null, "mappingItemCollection != null");
Perspective perspective = new TargetPerspective(mappingItemCollection.Workspace);
var parserOptions = new ParserOptions();
parserOptions.ParserCompilationMode = compilationMode;
// Parameters have to be accessible in the body as regular scope variables, not as command parameters.
// Hence compile view as lambda with parameters as lambda vars, then invoke the lambda specifying
// command parameters as values of the lambda vars.
var functionBody = CqlQuery.CompileQueryCommandLambda(
viewDef,
perspective,
parserOptions,
null /* parameters */,
parameters.Select(pInfo => pInfo.ResultType.Variable(pInfo.ParameterName)));
Debug.Assert(functionBody != null, "functionBody != null");
DbExpression expr = functionBody.Invoke(parameters);
return expr;
}
internal static DbCommandTree CompileView(
string viewDef,
StorageMappingItemCollection mappingItemCollection,
ParserOptions.CompilationMode compilationMode)
{
Debug.Assert(!String.IsNullOrEmpty(viewDef), "!String.IsNullOrEmpty(viewDef)");
Debug.Assert(mappingItemCollection != null, "mappingItemCollection != null");
Perspective perspective = new TargetPerspective(mappingItemCollection.Workspace);
var parserOptions = new ParserOptions();
parserOptions.ParserCompilationMode = compilationMode;
var expr = CqlQuery.Compile(viewDef, perspective, parserOptions, null).CommandTree;
Debug.Assert(expr != null, "Compile returned empty tree?");
return expr;
}