Julian Hyde created CALCITE-4380:
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             Summary: Make class SqlNodeList implement List<SqlNode>
                 Key: CALCITE-4380
                 URL: https://issues.apache.org/jira/browse/CALCITE-4380
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde


Make {{class SqlNodeList}} implement {{List<SqlNode>}}. Currently it implements 
{{Iterable<SqlNode>}}. Supporting the List interface would make the size 
available, and that might allow users of SqlNodeList to pre-allocate space.

The downside is that a few places might have different overloads on {{SqlNode}} 
and {{Collection<SqlNode>}} or {{List<SqlNode>}}, and these would become 
ambiguous because {{SqlNodeList}} implements both.

Another benefit is that we can remove many of the calls to {{List<SqlNode> 
SqlNodeList.toList()}}.



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