开发者_JAVA技巧When does CBO compiler use Range scan in oracle??
When there's a suitable index on the table - and the calculated cost of the plan is the least (or if the query is hinted to scan the index).
When does CBO compiler use Range scan in oracle?
开发者_JAVA技巧When does CBO compiler use Range scan in oracle??When there\'s a suitable index on the table - and the calculated cost of the plan is the least (or if the query is hinted to scan the in
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