Help:Query restrictions

This help page provides an overview to query restrictions and how to change them by adapting the respective configuration parameters.

Query size and depth

In case a query returns with a message like "The following $2 query conditions could not be considered due to this wiki's restrictions on query size or depth: $1." (with $1, $2 being placeholders)1 the following configuration parameters $smwgQMaxSizeSets the maximum number of conditions for inline queries and $smwgQMaxDepthSets the maximum property depth for inline queries define the restrictions applied before a query is executed:

• $smwgQMaxSize defines the maximum number of conditions in queries
• $smwgQMaxDepth defines the maximum property depth of queries (e.g. [[Rel1::<q>[[Rel2::Test]]</q>]] has depth 2)

Using result format "Debug" (format=debug) for the respective to output the computed size and depth of query and to analyze the restrictions applied to a query.

Limit query execution

The $smwgQExpensiveThresholdDefines the expensive threshold (denotes the ceiling) and $smwgQExpensiveExecutionLimitLimit of expensive #ask/#show parser functions (count all classified #ask/#show parser functions and restricts further use on pages that exceed that limit) configuration parameters can be used to limit the execution of expensive #ask and #show queries.

See also

size and depth

• Help page on inline queries
• Help page on selecting pages (query conditions)
• Help page on subqueries and property chains (property depth)
• Semantic MediaWiki: GitHub issue 4003– How to interpret "The following query condition ...this wiki’s limitations on query size or depth"

execution

• Help page on expensive queries
• Help page on speeding up Semantic MediaWiki
• Help page on page loading time