[jira] [Updated] (CALCITE-4804) Support Snapshot operator serialization and deserizalization

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-4804:
------------------------------------
    Labels: pull-request-available  (was: )

>  Support Snapshot operator serialization and deserizalization
> -------------------------------------------------------------
>
>                 Key: CALCITE-4804
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4804
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: xzh_dz
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In my project, the dimension table has versions of the contents of the table. When I serialize the `Snapshot operator`, there are exceptions. Examples of exceptions can be reproduced as follows.
> {code:java}
> // code placeholder
> @Test void testSnapshot() {
>   // Equivalent SQL:
>   //   SELECT *
>   //   FROM products_temporal FOR SYSTEM_TIME AS OF TIMESTAMP '2011-07-20 12:34:56'
>   final RelBuilder builder = RelBuilder.create(config().build());
>   RelNode root =
>       builder.scan("products_temporal")
>           .snapshot(
>               builder.getRexBuilder().makeTimestampLiteral(
>                   new TimestampString("2011-07-20 12:34:56"), 0))
>           .build();
>   RelJsonWriter jsonWriter = new RelJsonWriter();
>   root.explain(jsonWriter);
>   String relJson = jsonWriter.asString();
>   String s = deserializeAndDumpToTextFormat(getSchema(root), relJson);
> }{code}
> Exception:
> {code:java}
> // code placeholder
> java.lang.RuntimeException: class does not have required constructor, class org.apache.calcite.rel.logical.LogicalSnapshot(RelInput)java.lang.RuntimeException: class does not have required constructor, class org.apache.calcite.rel.logical.LogicalSnapshot(RelInput)java.lang.RuntimeException: java.lang.RuntimeException: class does not have required constructor, class org.apache.calcite.rel.logical.LogicalSnapshot(RelInput) at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:193) at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:135) at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:153) at org.apache.calcite.test.RelBuilderTest.deserializeAndDump(RelBuilderTest.java:4005) at org.apache.calcite.test.RelBuilderTest.deserializeAndDumpToTextFormat(RelBuilderTest.java:3981)
> {code}



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