public FieldToFetch(string name, SelectField queryField, string projectedName, bool canExtractFromIndex, bool isDocumentId)
{
Name = name;
QueryField = queryField;
ProjectedName = projectedName;
IsDocumentId = isDocumentId;
CanExtractFromIndex = canExtractFromIndex;
}
private static FieldToFetch GetFieldToFetch(
IndexDefinitionBaseServerSide indexDefinition,
QueryMetadata metadata,
ProjectionBehavior?projectionBehavior,
SelectField selectField,
Dictionary <string, FieldToFetch> results,
out string selectFieldKey,
ref bool anyExtractableFromIndex,
ref bool extractAllStoredFields,
ref bool anyTimeSeries)
{
var mustExtractFromIndex = projectionBehavior.FromIndexOnly();
var maybeExtractFromIndex = projectionBehavior.FromIndexOrDefault();
selectFieldKey = selectField.Alias ?? selectField.Name;
var selectFieldName = selectField.Name;
if (selectField.ValueTokenType != null)
{
return(new FieldToFetch(string.Empty, selectField, selectField.Alias,
canExtractFromIndex: false, isDocumentId: false, isTimeSeries: false));
}
if (selectField.Function != null)
{
var isTimeSeries = metadata.DeclaredFunctions != null && metadata.DeclaredFunctions.TryGetValue(selectField.Function, out var func) && func.Type == DeclaredFunction.FunctionType.TimeSeries;
if (isTimeSeries)
{
anyTimeSeries = true;
}
var fieldToFetch = new FieldToFetch(
selectField.Name,
selectField,
selectField.Alias,
canExtractFromIndex: false,
isDocumentId: false,
isTimeSeries: isTimeSeries)
{
FunctionArgs = new FieldToFetch[selectField.FunctionArgs.Length]
};
for (int j = 0; j < selectField.FunctionArgs.Length; j++)
{
var ignored = false;
fieldToFetch.FunctionArgs[j] = GetFieldToFetch(
indexDefinition,
metadata,
projectionBehavior,
selectField.FunctionArgs[j],
null,
out _,
ref ignored,
ref ignored,
ref ignored
);
}
return(fieldToFetch);
}
if (selectField.IsCounter)
{
var fieldToFetch = new FieldToFetch(selectField.Name, selectField, selectField.Alias ?? selectField.Name,
canExtractFromIndex: false, isDocumentId: false, isTimeSeries: false);
if (selectField.FunctionArgs != null)
{
fieldToFetch.FunctionArgs = new FieldToFetch[0];
}
return(fieldToFetch);
}
if (selectFieldName == null)
{
if (selectField.IsGroupByKey == false)
{
return(null);
}
if (selectField.GroupByKeys.Length == 1)
{
selectFieldName = selectField.GroupByKeys[0].Name;
if (selectFieldKey == null)
{
selectFieldKey = selectFieldName;
}
}
else
{
selectFieldKey = selectFieldKey ?? "Key";
return(new FieldToFetch(selectFieldKey, selectField.GroupByKeyNames));
}
}
if (indexDefinition == null)
{
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias, canExtractFromIndex: false, isDocumentId: false, isTimeSeries: false));
}
if (selectFieldName.Value.Length > 0)
{
if (selectFieldName == Constants.Documents.Indexing.Fields.DocumentIdFieldName)
{
anyExtractableFromIndex = maybeExtractFromIndex;
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias,
canExtractFromIndex: indexDefinition is MapReduceIndexDefinition or AutoMapReduceIndexDefinition,
isDocumentId: true, isTimeSeries: false));
}
if (selectFieldName.Value[0] == '_')
{
if (selectFieldName == Constants.Documents.Indexing.Fields.AllStoredFields)
{
if (results == null)
{
ThrowInvalidFetchAllStoredDocuments();
}
Debug.Assert(results != null);
results.Clear(); // __all_stored_fields should only return stored fields so we are ensuring that no other fields will be returned
extractAllStoredFields = maybeExtractFromIndex;
foreach (var kvp in indexDefinition.MapFields)
{
var stored = kvp.Value.Storage == FieldStorage.Yes;
if (stored == false)
{
continue;
}
anyExtractableFromIndex = maybeExtractFromIndex;
results[kvp.Key] = new FieldToFetch(kvp.Key, null, null, canExtractFromIndex: maybeExtractFromIndex, isDocumentId: false, isTimeSeries: false);
}
return(null);
}
}
}
var bySourceAlias = ShouldTryToExtractBySourceAliasName(selectFieldName.Value, selectField);
var key = bySourceAlias
? selectField.SourceAlias
: selectFieldName;
var extract = mustExtractFromIndex || (maybeExtractFromIndex && indexDefinition.MapFields.TryGetValue(key, out var value) && value.Storage == FieldStorage.Yes);
if (extract)
{
anyExtractableFromIndex = true;
}
if (bySourceAlias == false && maybeExtractFromIndex)
{
extract |= indexDefinition.HasDynamicFields;
}
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias, extract, isDocumentId: false, isTimeSeries: false));
}
private static bool ShouldTryToExtractBySourceAliasName(string selectFieldName, SelectField selectField)
{
return(selectFieldName.Length == 0 &&
selectField.HasSourceAlias &&
selectField.SourceAlias != null);
}
private static FieldToFetch GetFieldToFetch(
IndexDefinitionBase indexDefinition,
SelectField selectField,
Dictionary <string, FieldToFetch> results,
out string selectFieldKey,
ref bool anyExtractableFromIndex,
ref bool extractAllStoredFields)
{
selectFieldKey = selectField.Alias ?? selectField.Name;
var selectFieldName = selectField.Name;
if (selectField.ValueTokenType != null)
{
return(new FieldToFetch(string.Empty, selectField, selectField.Alias,
canExtractFromIndex: false, isDocumentId: false));
}
if (selectField.Function != null)
{
var fieldToFetch = new FieldToFetch(selectField.Name, selectField, selectField.Alias,
canExtractFromIndex: false, isDocumentId: false)
{
FunctionArgs = new FieldToFetch[selectField.FunctionArgs.Length]
};
for (int j = 0; j < selectField.FunctionArgs.Length; j++)
{
bool ignored = false;
fieldToFetch.FunctionArgs[j] = GetFieldToFetch(indexDefinition,
selectField.FunctionArgs[j],
null,
out _,
ref ignored,
ref ignored
);
}
return(fieldToFetch);
}
if (selectFieldName == null)
{
if (selectField.IsGroupByKey == false)
{
return(null);
}
if (selectField.GroupByKeys.Length == 1)
{
selectFieldName = selectField.GroupByKeys[0];
if (selectFieldKey == null)
{
selectFieldKey = selectFieldName;
}
}
else
{
selectFieldKey = selectFieldKey ?? "Key";
return(new FieldToFetch(selectFieldKey, selectField.GroupByKeys));
}
}
if (indexDefinition == null)
{
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias, canExtractFromIndex: false, isDocumentId: false));
}
if (selectFieldName.Length > 0)
{
if (selectFieldName == Constants.Documents.Indexing.Fields.DocumentIdFieldName)
{
anyExtractableFromIndex = true;
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias, canExtractFromIndex: false, isDocumentId: true));
}
if (selectFieldName[0] == '_')
{
if (selectFieldName == Constants.Documents.Indexing.Fields.AllStoredFields)
{
if (results == null)
{
ThrowInvalidFetchAllStoredDocuments();
}
Debug.Assert(results != null);
results.Clear(); // __all_stored_fields should only return stored fields so we are ensuring that no other fields will be returned
extractAllStoredFields = true;
foreach (var kvp in indexDefinition.MapFields)
{
var stored = kvp.Value.Storage == FieldStorage.Yes;
if (stored == false)
{
continue;
}
anyExtractableFromIndex = true;
results[kvp.Key] = new FieldToFetch(kvp.Key, null, null, canExtractFromIndex: true, isDocumentId: false);
}
return(null);
}
}
}
var extract = indexDefinition.MapFields.TryGetValue(selectFieldName, out var value) && value.Storage == FieldStorage.Yes;
if (extract)
{
anyExtractableFromIndex = true;
}
return(new FieldToFetch(selectFieldName, selectField, selectField.Alias, extract | indexDefinition.HasDynamicFields, isDocumentId: false));
}
