kennknowles opened a new issue, #18885:
URL: https://github.com/apache/beam/issues/18885
When attaching a partition decorator to the table id, readTableRows() throws
a NullPointerException.
```
TableReference tableRef =
BigQueryHelpers.parseTableSpec(options.getBqTable());
tableRef.setTableId(tableRef.getTableId()
+ "$" + options.getPartitionValue());
//Regardless of whether this should work with the table decorator,
//it
should not throw a NullPointerException
PCollection<TableRow> rowsByPartition = p.apply("Read live
data",
BigQueryIO.readTableRows().from(tableRef));
```
Exception:
Exception in thread "main"
org.apache.beam.sdk.Pipeline$PipelineExecutionException:
java.lang.NullPointerException
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:317)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:297)
at
com.fearlesstg.CannotReadFromPartitionedTable.main(CannotReadFromPartitionedTable.java:26)
Caused by: java.lang.NullPointerException
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryTableSource.getEstimatedSizeBytes(BigQueryTableSource.java:108)
at
org.apache.beam.runners.direct.BoundedReadEvaluatorFactory$InputProvider.getInitialInputs(BoundedReadEvaluatorFactory.java:207)
at
org.apache.beam.runners.direct.ReadEvaluatorFactory$InputProvider.getInitialInputs(ReadEvaluatorFactory.java:87)
at
org.apache.beam.runners.direct.RootProviderRegistry.getInitialInputs(RootProviderRegistry.java:62)
Detailed example:
[https://github.com/pbrumblay/bigqueryioproblems/blob/master/src/main/java/com/fearlesstg/CannotReadFromPartitionedTable.java](https://github.com/pbrumblay/bigqueryioproblems/blob/master/src/main/java/com/fearlesstg/CannotReadFromPartitionedTable.java)
Personally, I would also like this pattern to be supported as intended and
not have to construct queries with IN / WHERE clauses to pull partitions.
Imported from Jira
[BEAM-4369](https://issues.apache.org/jira/browse/BEAM-4369). Original Jira may
contain additional context.
Reported by: pbrumblay.
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