Denotes value SELECT with FOR UPDATE OF.
Use to perform a semi join.
During a hybrid join, this node denotes a join operation where the outer table records merge with one of the indexes on the inner table.
Access and scan with a sparse index.
A sparse index scan construct contains two nodes: a SIXSCAN node and a sparse index node labeled SPARSE INDEX.
Sort result set in the order specified from the join process or the query.
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