Github user edespino commented on a diff in the pull request:
https://github.com/apache/incubator-madlib/pull/157#discussion_r130696569
--- Diff: src/ports/postgres/modules/utilities/control.py_in ---
@@ -24,56 +25,66 @@ HAS_FUNCTION_PROPERTIES =
m4_ifdef(<!__HAS_FUNCTION_PROPERTIES__!>, <!True!>, <!
UDF_ON_SEGMENT_NOT_ALLOWED = m4_ifdef(<!__UDF_ON_SEGMENT_NOT_ALLOWED__!>,
<!True!>, <!False!>)
-class EnableOptimizer(object):
+class OptimizerControl(object):
"""
@brief: A wrapper that enables/disables the optimizer and
then sets it back to the original value on exit
"""
- def __init__(self, to_enable=True):
- self.to_enable = to_enable
+ def __init__(self, enable=True, error_on_fail=False):
+ self.to_enable = enable
+ self.error_on_fail = error_on_fail
self.optimizer_enabled = False
- # we depend on the fact that all GPDB/HAWQ versions that have the
+
+ # use the fact that all GPDB/HAWQ versions that have the
# optimizer also define function properties
self.guc_exists = True if HAS_FUNCTION_PROPERTIES else False
def __enter__(self):
- # we depend on the fact that all GPDB/HAWQ versions that have the
ORCA
- # optimizer also define function properties
if self.guc_exists:
- optimizer = plpy.execute("show optimizer")[0]["optimizer"]
- self.optimizer_enabled = True if optimizer == 'on' else False
- plpy.execute("set optimizer={0}".format(('off',
'on')[self.to_enable]))
+ # check if allowed to change the GUC
+ self.optimizer_control = bool(strtobool(
+ plpy.execute("show
optimizer_control")[0]["optimizer_control"]))
--- End diff --
Not sure how much it matters, but I took a quick look at HAWQ and it
appears the guc `optimizer_control` is not available. Will this throw an
exception and be handled properly?
Here is a link to HAWQ guc.c:
https://github.com/apache/incubator-hawq/blob/master/src/backend/utils/misc/guc.c
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