Clean up debug printing of the abstract syntax trees after parsing, binding and
optimization
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Key: DERBY-4087
URL: https://issues.apache.org/jira/browse/DERBY-4087
Project: Derby
Issue Type: Improvement
Components: Miscellaneous, SQL
Reporter: Dag H. Wanvik
Priority: Trivial
Currently, the printing is often inconsistent:
- some subtrees not printed
- wrong indentation due to missing newlines, or lacking level increments
- redundant printing of subtrees (AST is really a DAG, would be nice to print
only once and then refer back to show aliasing)
- some items printed twice due to inconsistent usage of pattern
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