arina-ielchiieva commented on a change in pull request #2024: DRILL-7641
Convert Excel Reader to use Streaming Reader
URL: https://github.com/apache/drill/pull/2024#discussion_r399237699
##########
File path:
contrib/format-excel/src/main/java/org/apache/drill/exec/store/excel/ExcelBatchReader.java
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@@ -134,121 +126,131 @@ public ExcelBatchReader(ExcelReaderConfig
readerConfig) {
@Override
public boolean open(FileSchemaNegotiator negotiator) {
split = negotiator.split();
- loader = negotiator.build();
+ ResultSetLoader loader = negotiator.build();
rowWriter = loader.writer();
openFile(negotiator);
defineSchema();
return true;
}
+ /**
+ * This method opens the Excel file, initializes the Streaming Excel Reader,
and initializes the sheet variable.
+ * @param negotiator The Drill file negotiator object that represents the
file system
+ */
private void openFile(FileScanFramework.FileSchemaNegotiator negotiator) {
try {
fsStream =
negotiator.fileSystem().openPossiblyCompressedStream(split.getPath());
- workbook = new XSSFWorkbook(fsStream);
+
+ // Open streaming reader
+ workbook = StreamingReader.builder()
+ .rowCacheSize(100) // Possible configuration option?
Review comment:
Please either make values as conf options or create constants.
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