MySQL 8.4 Reference Manual Including MySQL NDB Cluster 8.4
A component service provides access to query attributes (see
Section 11.6, “Query Attributes”). The
query_attributes component uses this service to
provide access to query attributes within SQL statements.
Purpose: Implements the
mysql_query_attribute_string()
function that takes an attribute name argument and returns the
attribute value as a string, or NULL if the
attribute does not exist.
URN: file://component_query_attributes
Developers who wish to incorporate the same query-attribute
component service used by query_attributes
should consult the mysql_query_attributes.h
file in a MySQL source distribution.