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Monthly Archives: April 2019

Correct syntax for the table_stats hint

Posted on April 16, 2019 by Roger MacNicol Posted in adaptive serial direct path reads, CBO, hints, oracle, SmartScan, trace, troubleshooting, undocumented 2,490 Page views 3 Comments

A friend contacted me to ask why they were having problems using the table_stats hint to influence optimizer decision making and also to influence the decision to use direct read or buffer cache scan so this is just a quick blog post to clarify the syntax as it is not well documented.

table_stats(<table_name> <method> {<keyword>=<value>} )

Method is one of: DEFAULT, SET, SCALE, SAMPLE

Keyword is one of: BLOCKS, ROWS, ROW_LENGTH
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