WarnNullPropagation

Table of Contents

When true, queries return a warning when a null value in an expression (for example 'a' + null) caused the whole expression to be null.

SET WarnNullPropagation true

The home page

Declares a variable for the rest of a script.

A breakdown of all of the statements and keywords supported by the query processor.

Removed: QueryThreadWeight is no longer a session variable.

Reads without waiting for other transactions' locks.

Settings that are scoped to the connected session.

Set changes a session variable.

Reports the time spent in each internal operation of a query.

Warns when a query references a field that a document does not have.