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xzh_dz edited comment on CALCITE-3583 at 9/22/21, 2:41 AM: ----------------------------------------------------------- [~julianhyde] thanks for review. There is already a PR that supports `RelDistribution` serialization and deserialization.but when I tested the unit test `{{testExchange`}}, I got the message below. ` java.lang.NullPointerException: no entry for tag collation java.lang.RuntimeException: java.lang.NullPointerException: no entry for tag collation at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:193) at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:135) ` So i create a new JIRA. Maybe this JIRA should be closed. Please help review [Exchange operator deserialize fail|https://github.com/apache/calcite/pull/2519] was (Author: xzh_dz): [~julianhyde] thanks for review. There is already a PR that supports `RelDistribution` serialization and deserialization.but when I tested the unit test `{{testExchange`}}, I got the message below. ` java.lang.NullPointerException: no entry for tag collation java.lang.RuntimeException: java.lang.NullPointerException: no entry for tag collation at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:193) at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:135) ` So i create a new JIRA. Maybe this JIRA should be closed. Please help review [Exchange operator deserialize fail|[http://example.com|https://github.com/apache/calcite/pull/2519]] > Support serialized to json and deserialized from json for Exchange relation > operator > ------------------------------------------------------------------------------------ > > Key: CALCITE-3583 > URL: https://issues.apache.org/jira/browse/CALCITE-3583 > Project: Calcite > Issue Type: Improvement > Reporter: Wang Yanlin > Priority: Major > Labels: pull-request-available > Time Spent: 3h 10m > Remaining Estimate: 0h > > Currently, serialize Exchange relnode to json will cause exception > {code:java} > // RelWriterTest > @Test public void testExchange() { > final FrameworkConfig config = RelBuilderTest.config().build(); > final RelBuilder builder = RelBuilder.create(config); > final RelNode rel = builder > .scan("EMP") > .exchange(RelDistributions.hash(ImmutableList.of(0, 1))) > .build(); > String relJson = RelOptUtil.dumpPlan("", rel, > SqlExplainFormat.JSON, SqlExplainLevel.EXPPLAN_ATTRIBUTES); > String s = deserializeAndDumpToTextFormat(getSchema(rel), relJson); > final String expected = "" > + "LogicalExchange(distribution=[hash[0, 1]])\n" > + " LogicalTableScan(table=[[scott, EMP]])\n"; > assertThat(s, isLinux(expected)); > } > {code} > got > {code:java} > java.lang.UnsupportedOperationException: type not serializable: hash[0, 1] > (type org.apache.calcite.rel.RelDistributions.RelDistributionImpl) > at org.apache.calcite.rel.externalize.RelJson.toJson(RelJson.java:290) > at > org.apache.calcite.rel.externalize.RelJsonWriter.put(RelJsonWriter.java:83) > at > org.apache.calcite.rel.externalize.RelJsonWriter.explain_(RelJsonWriter.java:66) > at > org.apache.calcite.rel.externalize.RelJsonWriter.done(RelJsonWriter.java:128) > at > org.apache.calcite.rel.AbstractRelNode.explain(AbstractRelNode.java:299) > at org.apache.calcite.plan.RelOptUtil.dumpPlan(RelOptUtil.java:1981) > at > org.apache.calcite.plan.RelWriterTest.testExchange(RelWriterTest.java:772) > {code} -- This message was sent by Atlassian Jira (v8.3.4#803005)