Wang Yanlin created CALCITE-3259:
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             Summary: Align 'Property' in the serialized xml string of 
RelXmlWriter.
                 Key: CALCITE-3259
                 URL: https://issues.apache.org/jira/browse/CALCITE-3259
             Project: Calcite
          Issue Type: Improvement
            Reporter: Wang Yanlin


In the serialized xml string of  RelXmlWriter, the 'Property' label is aligned.

For the sql below
{noformat}
select 1 + 2, 3 from (values (true))
{noformat}
the serialized xml string is like this:
{noformat}
<RelNode type="LogicalProject">
        <Property name="EXPR$0">
                +(1, 2) </Property>
        <Property name="EXPR$1">
                3       </Property>
        <Inputs>
                <RelNode type="LogicalValues">
                        <Property name="tuples">
                                [{ true }]                      </Property>
                        <Inputs/>
                </RelNode>
        </Inputs>
</RelNode>
{noformat}
It's better to make 'Property' aligned.



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