REL_IMPORT_QUERY = "\nUNWIND $data AS row\nMATCH (
source {id: row.source_id})\nMATCH (target {id: row.target_id})\nWITH source, target, row\nCALL merge.relationship(source,
row.type,
{},
{},
target,
{}
)\nYIELD rel\nRETURN distinct 'done' AS result\n"