vlsi commented on issue #1740: [CALCITE-3713] Remove column names from Project#digest URL: https://github.com/apache/calcite/pull/1740#issuecomment-584850203 > We don't build strings over and over Every time we create a new RelType we build stings. Every time we create RelNode we build strings. Every time we create RexNode we build strings. This is relevant: https://issues.apache.org/jira/browse/CALCITE-3784
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