kazuyukitanimura commented on a change in pull request #34611: URL: https://github.com/apache/spark/pull/34611#discussion_r754828616
########## File path: sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedPlainValuesReader.java ########## @@ -53,19 +53,47 @@ public void skip() { throw new UnsupportedOperationException(); } + private void updateCurrentByte() { + try { + currentByte = (byte) in.read(); + } catch (IOException e) { + throw new ParquetDecodingException("Failed to read a byte", e); + } + } + @Override public final void readBooleans(int total, WritableColumnVector c, int rowId) { - // TODO: properly vectorize this - for (int i = 0; i < total; i++) { - c.putBoolean(rowId + i, readBoolean()); + int i = 0; + if (bitOffset > 0) { + i = Math.min(8 - bitOffset, total); Review comment: `readBooleans()` can be called multiple times. The scenario is tested in `ColumnarBatchSuite.scala`. `readBooleans()` also calls `updateCurrentByte()` right before using it. ``` public final void readBooleans(... if (bitOffset > 0) { // means there are still bits to be read in currentByte ... for (; i + 7 < total; i += 8) { updateCurrentByte(); // calling it here ... if (i < total) { updateCurrentByte(); // calling it here ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org