Execution Plan
From BaseX Documentation
This article is part of the Advanced User's Guide.
For each execution of a query, BaseX creates an execution plan.
This execution plan shows you each step of the query, so that
you can evaluate your query and analyse if it accesses any indexes
or not. You can activate the execution plan by activating the
XMLPLAN or DOTPLAN
options.
[edit] Examples
[edit] Execution plan for original and optimized query execution
Query:
for $item in doc(’xmark’)/descendant::item
where $item/payment = ’Creditcard’
return $item
Optimized query:
doc(’xmark’)/descendant::item[payment = ’Creditcard’]
Execution plan:
[edit] Execution plan for query execution with full-text index access and without
Query:
//MEDIUM/LAN[text() contains text "dt"]
Execution plan:
