julianhyde commented on code in PR #5274:
URL: https://github.com/apache/calcite/pull/5274#discussion_r4159473425
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core/src/main/java/org/apache/calcite/tools/RelBuilder.java:
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@@ -195,7 +199,45 @@
public class RelBuilder {
protected final RelOptCluster cluster;
protected final @Nullable RelOptSchema relOptSchema;
- private final Deque<Frame> stack = new ArrayDeque<>();
+ /** Stack of relational expressions that are being built.
+ *
Review Comment:
This anonymous class is rather verbose to be in the section that declares
fields. Make it a named inner class and move it towards the end of the file.
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