sunchao commented on a change in pull request #34611: URL: https://github.com/apache/spark/pull/34611#discussion_r752516781
########## File path: sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedPlainValuesReader.java ########## @@ -53,19 +53,46 @@ 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); + c.putBooleans(rowId, i, currentByte, bitOffset); + bitOffset = (bitOffset + i) & 7; + } + for (; i + 7 < total; i += 8) { + updateCurrentByte(); + c.putBooleans(rowId + i, currentByte); + } + if (i < total) { + updateCurrentByte(); + bitOffset = total - i; + c.putBooleans(rowId + i, bitOffset, currentByte, 0); } } @Override public final void skipBooleans(int total) { - // TODO: properly vectorize this - for (int i = 0; i < total; i++) { - readBoolean(); + int skipBytes = (bitOffset + total - 8) / 8; + bitOffset = (bitOffset + total) & 7; + if (skipBytes >= 0) { Review comment: hmm why should we enter this when `skipBytes == 0`? suppose `bitOffset = 1` and `total = 3`, we shouldn't update the `currentByte` right? ########## File path: sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/OnHeapColumnVector.java ########## @@ -147,6 +147,18 @@ public void putBooleans(int rowId, int count, boolean value) { } } + @Override + public void putBooleans(int rowId, byte src) { Review comment: 👍 I think this is much easier to read :) we can always optimize it later if it turns out to be importance for performance (right now seems not so). -- 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