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https://issues.apache.org/jira/browse/CALCITE-2430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16562519#comment-16562519
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Vladimir Sitnikov edited comment on CALCITE-2430 at 7/30/18 9:16 PM:
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{quote}Yes, I know. But is there any point in having a namespace that is not a
struct? I don't think so.
{quote}
That's a good question.
{{org.apache.calcite.sql.validate.SqlValidatorScope.Resolve#namespace}} is used
in quite a few places (12 usages), so it might deserve its own ticket/code
change.
was (Author: vladimirsitnikov):
{quote}Yes, I know. But is there any point in having a namespace that is not a
struct? I don't think so.{quote}
That's a good question.
{{org.apache.calcite.sql.validate.SqlValidatorScope.Resolve#namespace}} is used
in quite a few places, so it might deserve its own ticket/code change.
> AssertionError: RelDataTypeImpl.getFieldList when SQL Advisor inspects
> non-struct field
> ---------------------------------------------------------------------------------------
>
> Key: CALCITE-2430
> URL: https://issues.apache.org/jira/browse/CALCITE-2430
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: Vladimir Sitnikov
> Assignee: Julian Hyde
> Priority: Major
> Fix For: 1.18.0
>
> Attachments: fieldnamespace.png
>
>
> Test case (in JdbcTest):
> {code:java} @Test public void testSqlAdvisorNonStructColumn()
> throws SQLException, ClassNotFoundException {
> adviseSql("select e.\"empid\".^ from \"hr\".\"emps\" e",
> CalciteAssert.checkResultUnordered(
> "id=; names=null; type=MATCH",
> "id=hr.dependents; names=[hr, dependents]; type=TABLE",
> "id=hr.depts; names=[hr, depts]; type=TABLE",
> "id=hr.emps; names=[hr, emps]; type=TABLE",
> "id=hr.locations; names=[hr, locations]; type=TABLE",
> "id=hr; names=[hr]; type=SCHEMA"));
> }{code}
> Relevant source from RelDataTypeImpl.getFieldList:
> {code:java} public List<RelDataTypeField> getFieldList() {
> assert isStruct(); // <-- Error here
> return fieldList;
> }{code}
> Relevant source from SqlValidatorImpl.lookupNameCompletionHints:
> {code:java} if (ns != null) {
> RelDataType rowType = ns.getRowType();
> for (RelDataTypeField field : rowType.getFieldList()) { // <-- Error
> here
> hintList.add(
> new SqlMonikerImpl(
> field.getName(),
> SqlMonikerType.COLUMN));
> }
> }{code}
> It looks like it makes sense to add {{isStruct}} check before iterating over
> {{rowType.getFieldList()}}.
> Any objections?
> Original exception: {noformat}
> java.lang.AssertionError
> at
> org.apache.calcite.rel.type.RelDataTypeImpl.getFieldList(RelDataTypeImpl.java:146)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.lookupNameCompletionHints(SqlValidatorImpl.java:808)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.lookupSelectHints(SqlValidatorImpl.java:690)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.lookupSelectHints(SqlValidatorImpl.java:701)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.lookupHints(SqlValidatorImpl.java:655)
> at
> org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints(SqlAdvisor.java:235)
> at
> org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints0(SqlAdvisor.java:182)
> at
> org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints(SqlAdvisor.java:142)
> at
> org.apache.calcite.sql.advise.SqlAdvisorGetHintsFunction.getCompletionHints(SqlAdvisorGetHintsFunction.java:105)
> at Baz.bind(Unknown Source)
> at
> org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:356)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:309)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl._createIterable(CalciteMetaImpl.java:506)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:497)
> at
> org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:182)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:64)
> at
> org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:43)
> at
> org.apache.calcite.avatica.AvaticaConnection.executeQueryInternal(AvaticaConnection.java:573)
> at
> org.apache.calcite.avatica.AvaticaPreparedStatement.executeQuery(AvaticaPreparedStatement.java:137)
> at org.apache.calcite.test.JdbcTest.adviseSql(JdbcTest.java:426)
> at
> org.apache.calcite.test.JdbcTest.testSqlAdvisorNonStructColumn(JdbcTest.java:359)
> {noformat}
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