866 incorrect precision and scale parsing due to column comment interference #961

Job	Run time
build-kafka-lightweight / build	6m 49s
testflows-kafka / testflows-kafka	1h 10m 28s
testflows-lightweight / testflows-lightweight	1h 7m 18s
java-tests-kafka / java-kafka	1m 35s
java-tests-lightweight / java-lightweight	1h 33m 35s
testflows-lightweight / testflows-lightweight-replicated	1h 14m 32s
	5h 14m 17s

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