Can I use… with recursive (non-linear)


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Referencing the query_name more than once in the query definition:

WITH RECURSIVE query_name (c) AS (
   VALUES (1)
   UNION
   SELECT x FROM query_name JOIN base_table
                              ON base_table.x = query_name.c
   UNION
   SELECT y FROM query_name JOIN base_table
                              ON base_table.y = query_name.c
)
SELECT *
  FROM query_name

Normative References

The with recursive clause is defined in ISO/IEC 9075:2016-2 as part of optional feature T131, “Recursive query” but non-linear recursion is prohibited in §7.17 Syntax Rule 3 j x.

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