LineageHolder is an abstraction to hold the lineage result analyzed by LineageAnalyzer at different level.
At the bottom, we have :class:`sqllineage.core.holders.SubQueryLineageHolder` to hold lineage at subquery level. This is used internally by :class:`sqllineage.core.analyzer.LineageAnalyzer`.
LineageAnalyzer generates :class:`sqllineage.core.holder.StatementLineageHolder` as the result of lineage at SQL statement level.
To assemble multiple :class:`sqllineage.core.holder.StatementLineageHolder` into a DAG based data structure serving for the final output, we have :class:`sqllineage.core.holders.SQLLineageHolder`
.. autoclass:: sqllineage.core.holders.SubQueryLineageHolder
:members:
.. autoclass:: sqllineage.core.holders.StatementLineageHolder
:members:
.. autoclass:: sqllineage.core.holders.SQLLineageHolder
:members: