[DRILL-7645] Query on tables from postgres INFORMATION_SCHEMA fails with NPE

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.17.0
• Fix Version/s: Future
• Assignee: Unassigned
• Reporter: Vova Vysotskyi
• Created: 17/Mar/20 16:56
• Updated: 17/Mar/20 19:33

Description

Steps to reproduce:

1. Set up JDBC storage plugin to work with Postgres, as described here: https://drill.apache.org/docs/rdbms-storage-plugin/
2. Run the following query:

SELECT * FROM postgres1.`INFORMATION_SCHEMA`.`tables`;

It fails with NPE:

Error: SYSTEM ERROR: NullPointerException


Please, refer to logs for more information.

[Error Id: 897978fa-fd7d-4337-8a33-b8c18501e9c7 on user515050-pc:31010] (state=,code=0)

Stack trace:

Caused by: java.lang.NullPointerException: 
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRexShuttle.removeDistinct(RelStructuredTypeFlattener.java:858)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRexShuttle.visitInputRef(RelStructuredTypeFlattener.java:850)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRexShuttle.visitInputRef(RelStructuredTypeFlattener.java:829)
	at org.apache.calcite.rex.RexInputRef.accept(RexInputRef.java:112)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.flattenProjection(RelStructuredTypeFlattener.java:685)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.flattenProjections(RelStructuredTypeFlattener.java:583)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewriteRel(RelStructuredTypeFlattener.java:504)
	at .......(:0)
	at org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:257)
	at org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:214)
	at org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:464)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRelVisitor.visit(RelStructuredTypeFlattener.java:810)
	at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewrite(RelStructuredTypeFlattener.java:197)
	at org.apache.calcite.sql2rel.SqlToRelConverter.flattenTypes(SqlToRelConverter.java:468)
	at org.apache.drill.exec.planner.sql.conversion.SqlConverter.toRel(SqlConverter.java:223)
	at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToRel(DefaultSqlHandler.java:661)
	at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.validateAndConvert(DefaultSqlHandler.java:198)
	at org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan(DefaultSqlHandler.java:169)
	at org.apache.drill.exec.planner.sql.DrillSqlWorker.getQueryPlan(DrillSqlWorker.java:283)
	at org.apache.drill.exec.planner.sql.DrillSqlWorker.getPhysicalPlan(DrillSqlWorker.java:163)
	at org.apache.drill.exec.planner.sql.DrillSqlWorker.convertPlan(DrillSqlWorker.java:128)
	at org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan(DrillSqlWorker.java:93)
	at org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:590)
	at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:275)
	... 1 common frames omitted