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https://issues.apache.org/jira/browse/CALCITE-4019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17114570#comment-17114570
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Wang Yanlin commented on CALCITE-4019:
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Thanks [~xzh_dz] for following this jira, feel free to work on this.
> Visit SqlInsert with SqlShuttle cause NullPointerException
> ----------------------------------------------------------
>
> Key: CALCITE-4019
> URL: https://issues.apache.org/jira/browse/CALCITE-4019
> Project: Calcite
> Issue Type: Bug
> Reporter: Wang Yanlin
> Priority: Major
>
> When visit a SqlInsert with SqlShuttle, got NPE, the stack trace is
> {noformat}
> java.lang.NullPointerException
> at com.google.common.collect.Iterators$8.transform(Iterators.java:817)
> at
> com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
> at org.apache.calcite.sql.parser.SqlParserPos.sum(SqlParserPos.java:274)
> at
> org.apache.calcite.sql.parser.SqlParserPos.plusAll(SqlParserPos.java:183)
> at org.apache.calcite.sql.SqlOperator.createCall(SqlOperator.java:251)
> at
> org.apache.calcite.sql.util.SqlShuttle$CallCopyingArgHandler.result(SqlShuttle.java:117)
> at
> org.apache.calcite.sql.util.SqlShuttle$CallCopyingArgHandler.result(SqlShuttle.java:101)
> at org.apache.calcite.sql.util.SqlShuttle.visit(SqlShuttle.java:67)
> at org.apache.calcite.sql.util.SqlShuttle.visit(SqlShuttle.java:39)
> at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:139)
> at
> org.apache.calcite.sql.parser.SqlParserTest.testSqlParserPosPlus(SqlParserTest.java:8791)
> {noformat}
> Add this case in SqlParserTest to reproduce.
> return a new same SqlIdentifier for each SqlIdentifier, make sure
> [update|https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/sql/util/SqlShuttle.java#L117]
>
> happends
> {noformat}
> @Test void testSqlParserPosPlus() throws Exception {
> final String sql = "insert into emps select * from emps";
> SqlNode sqlNode = getSqlParser(sql).parseStmt();
> sqlNode.accept(new SqlShuttle(){
> @Override
> public SqlNode visit(SqlIdentifier identifier) {
> return new SqlIdentifier(identifier.names,
> identifier.getParserPosition());
> }
> });
> }
> {noformat}
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