DISABLE_CODEGEN Query Option
DISABLE_CODEGEN is a debug option, and it's used to work around any
issues with Impala's runtime code generation. If a query fails with an "illegal
instruction" or other hardware-specific message, try setting
DISABLE_CODEGEN=true and running the query again. If the query succeeds
only when the
DISABLE_CODEGEN option is turned on, submit the problem to
the appropriate support channel and include that detail in the problem report.
Most queries will run significantly slower with
In Impala 2.10 and higher, the
optimisation automatically disables codegen for small queries because short-running
queries may run faster without the overhead of codegen.
1: Disables codegen.
0: Enables codegen.
false (shown as 0 in output of