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===XQUERY3===
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|XQUERY3}}
|-
| '''Default'''
|{{Code|true}}
|-
| '''Summary'''
|Enables all [[XQuery 3.0]] features supported by BaseX. If this option is set to {{Code|false}}, the XQuery parser will only accept expressions of the XQuery 1.0 specification.
→MIXUPDATES
| '''Summary'''
|Prints more information on internal query rewritings, optimizations, and performance. By default, this info is shown in the [[GUI#Visualizations|Info View]] in the GUI. It can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-V</code>.
|}
|-
| '''Summary'''
|Allows queries to both contain updating and non-updating expressions. All updating constraints will be turned off, and nodes to be returned will be copied before they are modified by an updating expression. – By default, in compliance with the XQuery Update Facility, this option is set to {{Code|false}}, because the XQuery Update Facility does not allow an updating query to . See [[XQuery Update#Returning Results|return resultsReturning Results]]for more details.
|}
| '''Summary'''
|Specifies how many stack frames of [http://en.wikipedia.org/wiki/Tail_call tail-calls] are allowed on the stack at any time. When this limit is reached, tail-call optimization takes place and some call frames are eliminated. The feature can be turned off by setting the value to {{Code|-1}}.
|}
===WITHDB===
{{Mark|Introduced with Version 9.3.}}
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|WITHDB}}
|-
| '''Default'''
|{{Code|true}}
|-
| '''Summary'''
|By default, URIs specified in the [[Databases#XML Documents|fn:doc]] and [[Databases#XML Documents|fn:collection]] functions will also be resolved against existing databases. If {{Function|Database|db:open}} is consistently used to access database documents, it is recommendable to disable this option:
* Access to local and external resources will be faster, as the database lookup will be skipped.
* No locks will be created by the two functions (see [[Transaction Management#Limitations|limitations of database locking]] for more details).
|}
| '''Summary'''
|Generates the query plan, which can be activated via {{Option|XMLPLAN}}, before or after query compilation. This option can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-X</code>.
|}
===FULLPLAN===
{{Mark|Introduced with Version 9.2:}}
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|FULLPLAN [boolean]}}
|-
| '''Default'''
|{{Code|false}}
|-
| '''Summary'''
|Attaches the file path, line and column of the expressions in the original query string to the query plan. Values (items and sequences) have no input information attached.
|}
=Changelog=
;Version 9.3
* Added: {{Option|WITHDB}}
;Version 9.2
* Added: {{Option|RESTXQERRORS}}, {{Option|FULLPLAN}}
* Removed: <code>DOTPLAN</code>, <code>DOTCOMPACT</code>
