Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/16156#discussion_r90968113
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java
---
@@ -107,7 +107,16 @@ public void initialize(InputSplit inputSplit,
TaskAttemptContext taskAttemptCont
footer = readFooter(configuration, file, range(split.getStart(),
split.getEnd()));
MessageType fileSchema = footer.getFileMetaData().getSchema();
FilterCompat.Filter filter = getFilter(configuration);
- blocks = filterRowGroups(filter, footer.getBlocks(), fileSchema);
+ try {
+ blocks = filterRowGroups(filter, footer.getBlocks(), fileSchema);
+ } catch (IllegalArgumentException e) {
+ // In the case where a particular parquet files does not contain
+ // the column(s) in the filter, we don't do filtering at this level
+ // PARQUET-389 will resolve this issue in Parquet 1.9, which may
be used
+ // by future Spark versions. This is a workaround for current
Spark version.
+ // Also the assumption here is that the predicates will be applied
later
+ blocks = footer.getBlocks();
--- End diff --
Could you please add a TODO item int the comment so that we won't forget to
remove this after upgrading to 1.9? Thanks!
```
// TODO Remove this hack after upgrading to parquet-mr 1.9.
```
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