Add support for Hash/merge algorithms for outer joins
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Key: CORE-4823
URL: http://tracker.firebirdsql.org/browse/CORE-4823
Project: Firebird Core
Issue Type: Improvement
Reporter: Karol Bieniaszewski
example
SELECT
*
FROM
RDB$RELATION_FIELDS RF
left join RDB$RELATIONS R on R.RDB$SYSTEM_FLAG = RF.RDB$FIELD_POSITION
WHERE
RF.RDB$RELATION_NAME BETWEEN 'RDB$RELATIONS' AND 'RDB$RELATIONS2'
PLAN JOIN (RF INDEX (RDB$INDEX_4), R NATURAL)
will be good to see here HASH like is done for inner joins
PLAN HASH (R NATURAL, RF INDEX (RDB$INDEX_4))
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