LMV_JOIN_OPTIMIZATION_RESULTS

This view contains information about the results of join optimization operations. This table displays rows for each query plan and each table joined in the query plan.

Column Name	Description
`ACTIVITY_NAME`	The activity name of the query plan. This corresponds to `ACTIVITY_NAME` in `mv_activities`.
`QUERY_TEXT`	The text of the query.
`DATABASE_NAME`	The name of the related database.
`TABLE_NAME`	The name of a table within a given join.
`IS_LOCAL`	Whether or not a given join is local.
`SEQ_NUMBER`	The sequence number of this row among the rows for this query plan.
`TABLE_COUNT`	The number of tables included in a given join.
`TABLE_INDEX`	The position of the table in its join.
`FILTER_SELECTIVITY`	The estimated fraction of rows that satisfy the filter conditions on a given table (not including conditions involving multiple tables, i.e. join conditions)
`JOIN_SELECTIVITY`	The estimated fraction of rows that satisfy the join conditions.
`TABLE_CARD`	The estimated rowcount of the table.
`CARD_POST_FILTER`	The estimated rowcount of the table after filter conditions on this table only.
`CARD_POST_JOIN`	The estimated rowcount of the join so far after joining this table.
`COST_SO_FAR`	The estimated cost of executing a given join so far, according to the optimizer’s cost model.

Last modified: August 29, 2022

Was this article helpful?