func getFunctionsMetadata()

in metadata.go [1181:1234]
50 lines of code
8 McCabe index (conditional complexity)

func getFunctionsMetadata(session *Session, keyspaceName string) ([]FunctionMetadata, error) {
	if session.cfg.ProtoVersion == protoVersion1 || !session.hasAggregatesAndFunctions {
		return nil, nil
	}
	var tableName string
	if session.useSystemSchema {
		tableName = "system_schema.functions"
	} else {
		tableName = "system.schema_functions"
	}
	stmt := fmt.Sprintf(`
		SELECT
			function_name,
			argument_types,
			argument_names,
			body,
			called_on_null_input,
			language,
			return_type
		FROM %s
		WHERE keyspace_name = ?`, tableName)

	var functions []FunctionMetadata

	rows := session.control.query(stmt, keyspaceName).Scanner()
	for rows.Next() {
		function := FunctionMetadata{Keyspace: keyspaceName}
		var argumentTypes []string
		var returnType string
		err := rows.Scan(&function.Name,
			&argumentTypes,
			&function.ArgumentNames,
			&function.Body,
			&function.CalledOnNullInput,
			&function.Language,
			&returnType,
		)
		if err != nil {
			return nil, err
		}
		function.ReturnType = getTypeInfo(returnType, byte(session.cfg.ProtoVersion), session.logger)
		function.ArgumentTypes = make([]TypeInfo, len(argumentTypes))
		for i, argumentType := range argumentTypes {
			function.ArgumentTypes[i] = getTypeInfo(argumentType, byte(session.cfg.ProtoVersion), session.logger)
		}
		functions = append(functions, function)
	}

	if err := rows.Err(); err != nil {
		return nil, err
	}

	return functions, nil
}