866 incorrect precision and scale parsing due to column comment interference #826

Job	Run time
build-kafka-lightweight / build	5m 20s
testflows-lightweight / testflows-lightweight	1h 1m 41s
testflows-kafka / testflows-kafka	46m 47s
java-tests-kafka / java-kafka	1m 34s
java-tests-lightweight / java-lightweight	1h 23m 47s
testflows-lightweight / testflows-lightweight-replicated	1h 14m 39s
	4h 33m 48s

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