Github user ppadma commented on a diff in the pull request:
https://github.com/apache/drill/pull/611#discussion_r84951720
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/columnreaders/VarLenBinaryReader.java
---
@@ -41,43 +51,149 @@ public VarLenBinaryReader(ParquetRecordReader
parentReader, List<VarLengthColumn
public long readFields(long recordsToReadInThisPass, ColumnReader<?>
firstColumnStatus) throws IOException {
long recordsReadInCurrentPass = 0;
- int lengthVarFieldsInCurrentRecord;
- long totalVariableLengthData = 0;
- boolean exitLengthDeterminingLoop = false;
+
// write the first 0 offset
for (VarLengthColumn<?> columnReader : columns) {
columnReader.reset();
}
+ recordsReadInCurrentPass =
determineSizesSerial(recordsToReadInThisPass);
+ if(useAsyncTasks){
+ readRecordsParallel(recordsReadInCurrentPass);
+ }else{
+ readRecordsSerial(recordsReadInCurrentPass);
+ }
+ return recordsReadInCurrentPass;
+ }
+
+
+ private long determineSizesSerial(long recordsToReadInThisPass) throws
IOException {
+ int lengthVarFieldsInCurrentRecord = 0;
+ boolean exitLengthDeterminingLoop = false;
+ long totalVariableLengthData = 0;
+ long recordsReadInCurrentPass = 0;
do {
- lengthVarFieldsInCurrentRecord = 0;
for (VarLengthColumn<?> columnReader : columns) {
- if ( !exitLengthDeterminingLoop ) {
- exitLengthDeterminingLoop =
columnReader.determineSize(recordsReadInCurrentPass,
lengthVarFieldsInCurrentRecord);
+ if (!exitLengthDeterminingLoop) {
+ exitLengthDeterminingLoop =
+ columnReader.determineSize(recordsReadInCurrentPass,
lengthVarFieldsInCurrentRecord);
} else {
break;
}
}
// check that the next record will fit in the batch
- if (exitLengthDeterminingLoop || (recordsReadInCurrentPass + 1) *
parentReader.getBitWidthAllFixedFields() + totalVariableLengthData
- + lengthVarFieldsInCurrentRecord > parentReader.getBatchSize()) {
+ if (exitLengthDeterminingLoop ||
+ (recordsReadInCurrentPass + 1) *
parentReader.getBitWidthAllFixedFields()
+ + totalVariableLengthData + lengthVarFieldsInCurrentRecord >
parentReader.getBatchSize()) {
break;
}
- for (VarLengthColumn<?> columnReader : columns ) {
+ for (VarLengthColumn<?> columnReader : columns) {
columnReader.updateReadyToReadPosition();
columnReader.currDefLevel = -1;
}
recordsReadInCurrentPass++;
totalVariableLengthData += lengthVarFieldsInCurrentRecord;
} while (recordsReadInCurrentPass < recordsToReadInThisPass);
+ return recordsReadInCurrentPass;
+ }
+
+
+ public long determineSizesParallel(long recordsToReadInThisPass ) throws
IOException {
--- End diff --
Seems like this function is not used anywhere. Do you still want to keep it
?
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