Use ValueNodeList helper methods in CoalesceFunctionNode
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Key: DERBY-4600
URL: https://issues.apache.org/jira/browse/DERBY-4600
Project: Derby
Issue Type: Improvement
Components: SQL
Affects Versions: 10.6.0.0
Reporter: Knut Anders Hatlen
Priority: Minor
CoalesceFunctionNode manually iterates over argumentsList (a ValueNodeList) in
acceptChildren(), preprocess(), remapColumnReferencesToExpressions() and
isEquivalent(). ValueNodeList has helper methods for the first three of those,
and those helper methods should be used instead to simplify the code. There is
no helper method for isEquivalent(), but since very similar code is also found
in the isEquivalent() methods of BinaryListOperatorNode and ConditionalNode, we
should add a new helper and use it in those classes too.
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