The SYSCS_UTIL.SYSCS_GET_XPLAIN_SCHEMA function
returns the xplain schema for the connection.
The default xplain schema is empty,
so if the xplain style hasn't been set, the function returns the
empty string.
If the xplain schema has been set using
SYSCS_UTIL.SYSCS_SET_XPLAIN_SCHEMA, the function
returns the xplain schema that was set. If xplain schema is set to
a non-empty value, and runtime statistics are being captured, then
the runtime statistics will be stored into the SYSXPLAIN_* database
tables in that schema for later analysis.
See "Working with RunTimeStatistics" in the
Tuning Derby
for additional information.
