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fix: Custom node neighbour filtering and ordering #13

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fix: Custom node neighbour filtering and ordering #13

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4 changes: 4 additions & 0 deletions README.md
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Expand Up @@ -18,6 +18,10 @@ The virtual table requires 4 SQL constraints to be set for all queries:
- `tocolumn`: The node id column where an edge goes to (must be integer).
- `root`: The root node id of the breadth-first traversal.

The virtual table also supports the following optional constraints for custom neighbour filtering and ordering:
- `whereclause`: An SQL WHERE clause applied to filter neighbours during traversal.
- `orderby`: An SQL ORDER BY clause applied to order neighbours during traversal.

The virtual table also provides the following columns that can be returned or used as contraints:
- `id`: The id of the current node being visited.
- `distance`: The shortest distance to the current node from the root node.
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