[jira] [Commented] (CALCITE-3572) Lack of Hints information when serialization and deserialization

["xzh_dz (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16989335#comment-16989335 ] 

xzh_dz commented on CALCITE-3572:
---------------------------------

@[danny0405|https://github.com/apache/calcite/commits?author=danny0405] Excuse me, what do you think about this issue ?

> Lack of Hints information when serialization and deserialization
> ----------------------------------------------------------------
>
>                 Key: CALCITE-3572
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3572
>             Project: Calcite
>          Issue Type: Wish
>            Reporter: xzh_dz
>            Priority: Major
>
> when i try to serialization and deserialization hints as below:
> {code:java}
> @Test public void testExplainTerms() {
>   String sql = "select /*+ resource(mem='20Mb') */ empno, ename from emp";
>   final RelNode rel = tester.convertSqlToRel(sql).rel;
>   RelJsonWriter jsonWriter = new RelJsonWriter();
>   if(rel instanceof Project) {
>     rel.explain(jsonWriter);
>     final String relJson = jsonWriter.asString();
>     String s = deserializeAndDumpToTextFormat(getSchema(rel), relJson);
>     System.out.println(s);
>   }
> }
> {code}
>  
> {code:java}
> {
>   "rels": [
>     {
>       "id": "0",
>       "relOp": "LogicalTableScan",
>       "table": [
>         "CATALOG",
>         "SALES",
>         "EMP"
>       ],
>       "inputs": []
>     },
>     {
>       "id": "1",
>       "relOp": "LogicalProject",
>       "fields": [
>         "EMPNO",
>         "ENAME"
>       ],
>       "exprs": [
>         {
>           "input": 0,
>           "name": "$0"
>         },
>         {
>           "input": 1,
>           "name": "$1"
>         }
>       ]
>     }
>   ]
> }
> {code}
> I find that result lack of the Hints information, maybe we should support Hints serialization and deserialization.



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