private static Expression GetOrAddParameterRefToCompilationContext(ParsedRequest parsedRequest, PqlCompilerState compilerState, int parameterOrdinal)
{
Tuple <ParameterExpression, Expression> refTuple;
if (compilerState.ParamRefs.TryGetValue(parameterOrdinal, out refTuple))
{
return(refTuple.Item1);
}
ParameterExpression paramRef;
Expression paramExtractor;
var localOrdinal = parsedRequest.Params.OrdinalToLocalOrdinal[parameterOrdinal];
var dbType = parsedRequest.Params.DataTypes[parameterOrdinal];
if (BitVector.Get(compilerState.RequestParameters.IsCollectionFlags, parameterOrdinal))
{
var rowData = Expression.Field(compilerState.Context, "InputParametersCollections");
var hashsetType = typeof(HashSet <>).MakeGenericType(DriverRowData.DeriveSystemType(dbType));
paramExtractor = Expression.Convert(Expression.ArrayIndex(rowData, Expression.Constant(localOrdinal, typeof(int))), hashsetType);
paramRef = Expression.Variable(paramExtractor.Type);
}
else
{
var rowData = Expression.Field(compilerState.Context, "InputParametersRow");
paramExtractor = DriverRowData.CreateReadAccessor(rowData, dbType, localOrdinal);
paramRef = Expression.Variable(paramExtractor.Type);
}
compilerState.ParamRefs.Add(
parameterOrdinal, new Tuple <ParameterExpression, Expression>(paramRef, paramExtractor));
return(paramRef);
}
public static Expression CompileFieldValueExtractorClause(PqlCompilerState compilerState, FieldMetadata field, DataContainerDescriptor containerDescriptor, RequestExecutionContextCacheInfo cacheInfo, Type returnType)
{
var ordinal = GetFieldOrdinalInDriverFetchFields(cacheInfo.ParsedRequest, field);
var rowData = Expression.Field(compilerState.Context, "InputRow");
return(s_expressionRuntime.AdjustReturnType(DriverRowData.CreateReadAccessor(rowData, field.DbType, ordinal), returnType));
}
private static Expression GetOrAddFieldRefToCompilationContext(ParsedRequest parsedRequest, PqlCompilerState compilerState, FieldMetadata field)
{
Tuple <ParameterExpression, Expression> refTuple;
if (compilerState.FieldRefs.TryGetValue(field.FieldId, out refTuple))
{
return(refTuple.Item1);
}
var ordinal = GetFieldOrdinalInDriverFetchFields(parsedRequest, field);
var rowData = Expression.Field(compilerState.Context, "InputRow");
var fieldAccessor = DriverRowData.CreateReadAccessor(rowData, field.DbType, ordinal);
var fieldRef = Expression.Variable(fieldAccessor.Type);
compilerState.FieldRefs.Add(
field.FieldId, new Tuple <ParameterExpression, Expression>(fieldRef, fieldAccessor));
return(fieldRef);
}
