Creating a partial plan

When abstract plans are captured, full abstract plans are generated and stored. You can write partial plans that affect only a subset of the optimizer choices. If the query above had not used the index on t3, but all other parts of the query plan were optimal, you could create a partial plan for the query using the create plan command. This partial plan specifies only the index choice for t3:

create plan
"select t1.c11, t2.c21
from t1, t2, t3
where t1.c11 = t2.c21
and t1.c11 = t3.c31"
"( i_scan t3_c31_ix t3 )"

You can also create abstract plans with the plan clause for select, delete, update, and other commands that can be optimized. If the abstract plan dump mode is on, the query text and AP pair are saved in sysqueryplans.