private static void writeSchema(JsonWriter writer, IList<OrcProto.Type> types)
{
int i = 0;
foreach (OrcProto.Type type in types)
{
writer.newObject();
writer.key("columnId").value(i++);
writer.key("columnType").value(type.Kind.ToString());
if (type.FieldNamesCount > 0)
{
writer.key("childColumnNames").array();
foreach (string field in type.FieldNamesList)
{
writer.value(field);
}
writer.endArray();
writer.key("childColumnIds").array();
foreach (int colId in type.SubtypesList)
{
writer.value(colId);
}
writer.endArray();
}
if (type.HasPrecision)
{
writer.key("precision").value(type.Precision);
}
if (type.HasScale)
{
writer.key("scale").value(type.Scale);
}
if (type.HasMaximumLength)
{
writer.key("maxLength").value(type.MaximumLength);
}
writer.endObject();
}
}
private static void writeStripeInformation(JsonWriter writer, StripeInformation stripe)
{
writer.newObject();
writer.key("offset").value(stripe.getOffset());
writer.key("indexLength").value(stripe.getIndexLength());
writer.key("dataLength").value(stripe.getDataLength());
writer.key("footerLength").value(stripe.getFooterLength());
writer.key("rowCount").value(stripe.getNumberOfRows());
writer.endObject();
}
public static void printJsonMetaData(List<string> files, Configuration conf,
List<int> rowIndexCols, bool prettyPrint, bool printTimeZone)
{
JsonWriter writer = new JsonWriter();
bool multiFile = files.Count > 1;
if (multiFile)
{
writer.array();
}
else
{
writer.newObject();
}
foreach (string filename in files)
{
if (multiFile)
{
writer.newObject();
}
writer.key("fileName").value(Path.GetFileName(filename));
Reader reader = OrcFile.createReader(filename, OrcFile.readerOptions(conf));
writer.key("fileVersion").value(OrcFile.VersionHelper.getName(reader.getFileVersion()));
writer.key("writerVersion").value(reader.getWriterVersion().ToString());
using (RecordReaderImpl rows = (RecordReaderImpl)reader.rows())
{
writer.key("numberOfRows").value(reader.getNumberOfRows());
writer.key("compression").value(reader.getCompression().ToString());
if (reader.getCompression() != CompressionKind.NONE)
{
writer.key("compressionBufferSize").value(reader.getCompressionSize());
}
writer.key("schemaString").value(reader.getObjectInspector().getTypeName());
writer.key("schema").array();
writeSchema(writer, reader.getTypes());
writer.endArray();
writer.key("stripeStatistics").array();
List<StripeStatistics> stripeStatistics = reader.getStripeStatistics();
for (int n = 0; n < stripeStatistics.Count; n++)
{
writer.newObject();
writer.key("stripeNumber").value(n + 1);
StripeStatistics ss = stripeStatistics[n];
writer.key("columnStatistics").array();
for (int i = 0; i < ss.getColumnStatistics().Length; i++)
{
writer.newObject();
writer.key("columnId").value(i);
writeColumnStatistics(writer, ss.getColumnStatistics()[i]);
writer.endObject();
}
writer.endArray();
writer.endObject();
}
writer.endArray();
ColumnStatistics[] stats = reader.getStatistics();
int colCount = stats.Length;
writer.key("fileStatistics").array();
for (int i = 0; i < stats.Length; ++i)
{
writer.newObject();
writer.key("columnId").value(i);
writeColumnStatistics(writer, stats[i]);
writer.endObject();
}
writer.endArray();
writer.key("stripes").array();
int stripeIx = -1;
foreach (StripeInformation stripe in reader.getStripes())
{
++stripeIx;
long stripeStart = stripe.getOffset();
OrcProto.StripeFooter footer = rows.readStripeFooter(stripe);
writer.newObject(); // start of stripe information
writer.key("stripeNumber").value(stripeIx + 1);
writer.key("stripeInformation");
writeStripeInformation(writer, stripe);
if (printTimeZone)
{
writer.key("writerTimezone").value(
footer.HasWriterTimezone ? footer.WriterTimezone : FileDump.UNKNOWN);
}
long sectionStart = stripeStart;
writer.key("streams").array();
foreach (OrcProto.Stream section in footer.StreamsList)
{
writer.newObject();
string kind = section.HasKind ? section.Kind.ToString() : FileDump.UNKNOWN;
writer.key("columnId").value(section.Column);
writer.key("section").value(kind);
writer.key("startOffset").value(sectionStart);
writer.key("length").value(section.Length);
sectionStart += (long)section.Length;
writer.endObject();
}
writer.endArray();
writer.key("encodings").array();
for (int i = 0; i < footer.ColumnsCount; ++i)
{
writer.newObject();
OrcProto.ColumnEncoding encoding = footer.ColumnsList[i];
writer.key("columnId").value(i);
writer.key("kind").value(encoding.Kind.ToString());
if (encoding.Kind == OrcProto.ColumnEncoding.Types.Kind.DICTIONARY ||
encoding.Kind == OrcProto.ColumnEncoding.Types.Kind.DICTIONARY_V2)
{
writer.key("dictionarySize").value(encoding.DictionarySize);
}
writer.endObject();
}
writer.endArray();
if (rowIndexCols != null && rowIndexCols.Count != 0)
{
// include the columns that are specified, only if the columns are included, bloom filter
// will be read
bool[] sargColumns = new bool[colCount];
foreach (int colIdx in rowIndexCols)
{
sargColumns[colIdx] = true;
}
RecordReaderImpl.Index indices = rows.readRowIndex(stripeIx, null, sargColumns);
writer.key("indexes").array();
foreach (int col in rowIndexCols)
{
writer.newObject();
writer.key("columnId").value(col);
writeRowGroupIndexes(writer, col, indices.getRowGroupIndex());
writeBloomFilterIndexes(writer, col, indices.getBloomFilterIndex());
writer.endObject();
}
writer.endArray();
}
writer.endObject(); // end of stripe information
}
writer.endArray();
long fileLen = new FileInfo(filename).Length;
long paddedBytes = FileDump.getTotalPaddingSize(reader);
// empty ORC file is ~45 bytes. Assumption here is file length always >0
double percentPadding = ((double)paddedBytes / (double)fileLen) * 100;
writer.key("fileLength").value(fileLen);
writer.key("paddingLength").value(paddedBytes);
writer.key("paddingRatio").value(percentPadding);
rows.close();
}
writer.endObject();
}
if (multiFile)
{
writer.endArray();
}
if (prettyPrint)
{
#if false
string prettyJson;
if (multiFile)
{
JSONArray jsonArray = new JSONArray(writer.toString());
prettyJson = jsonArray.toString(2);
}
else
{
JSONObject jsonObject = new JSONObject(writer.toString());
prettyJson = jsonObject.toString(2);
}
#else
string prettyJson = writer.ToString();
#endif
System.Console.WriteLine(prettyJson);
}
else
{
System.Console.WriteLine(writer.ToString());
}
}
private static void writeRowGroupIndexes(JsonWriter writer, int col,
OrcProto.RowIndex[] rowGroupIndex)
{
OrcProto.RowIndex index;
if (rowGroupIndex == null || (col >= rowGroupIndex.Length) ||
((index = rowGroupIndex[col]) == null))
{
return;
}
writer.key("rowGroupIndexes").array();
for (int entryIx = 0; entryIx < index.EntryCount; ++entryIx)
{
writer.newObject();
writer.key("entryId").value(entryIx);
OrcProto.RowIndexEntry entry = index.EntryList[entryIx];
if (entry == null)
{
continue;
}
OrcProto.ColumnStatistics colStats = entry.Statistics;
writeColumnStatistics(writer, ColumnStatisticsImpl.deserialize(colStats));
writer.key("positions").array();
for (int posIx = 0; posIx < entry.PositionsCount; ++posIx)
{
writer.value(entry.PositionsList[posIx]);
}
writer.endArray();
writer.endObject();
}
writer.endArray();
}
private static void writeColumnStatistics(JsonWriter writer, ColumnStatistics cs)
{
if (cs != null)
{
writer.key("count").value(cs.getNumberOfValues());
writer.key("hasNull").value(cs.hasNull());
if (cs is BinaryColumnStatistics) {
writer.key("totalLength").value(((BinaryColumnStatistics)cs).getSum());
writer.key("type").value(OrcProto.Type.Types.Kind.BINARY.ToString());
} else if (cs is BooleanColumnStatistics) {
writer.key("trueCount").value(((BooleanColumnStatistics)cs).getTrueCount());
writer.key("falseCount").value(((BooleanColumnStatistics)cs).getFalseCount());
writer.key("type").value(OrcProto.Type.Types.Kind.BOOLEAN.ToString());
} else if (cs is IntegerColumnStatistics) {
writer.key("min").value(((IntegerColumnStatistics)cs).getMinimum());
writer.key("max").value(((IntegerColumnStatistics)cs).getMaximum());
if (((IntegerColumnStatistics)cs).isSumDefined())
{
writer.key("sum").value(((IntegerColumnStatistics)cs).getSum());
}
writer.key("type").value(OrcProto.Type.Types.Kind.LONG.ToString());
} else if (cs is DoubleColumnStatistics) {
writer.key("min").value(((DoubleColumnStatistics)cs).getMinimum());
writer.key("max").value(((DoubleColumnStatistics)cs).getMaximum());
writer.key("sum").value(((DoubleColumnStatistics)cs).getSum());
writer.key("type").value(OrcProto.Type.Types.Kind.DOUBLE.ToString());
} else if (cs is StringColumnStatistics) {
writer.key("min").value(((StringColumnStatistics)cs).getMinimum());
writer.key("max").value(((StringColumnStatistics)cs).getMaximum());
writer.key("totalLength").value(((StringColumnStatistics)cs).getSum());
writer.key("type").value(OrcProto.Type.Types.Kind.STRING.ToString());
} else if (cs is DateColumnStatistics) {
if (((DateColumnStatistics)cs).getMaximum() != null)
{
#if false
writer.key("min").value(((DateColumnStatistics)cs).getMinimum());
writer.key("max").value(((DateColumnStatistics)cs).getMaximum());
#endif
}
writer.key("type").value(OrcProto.Type.Types.Kind.DATE.ToString());
} else if (cs is TimestampColumnStatistics) {
if (((TimestampColumnStatistics)cs).getMaximum() != null)
{
#if false
writer.key("min").value(((TimestampColumnStatistics)cs).getMinimum());
writer.key("max").value(((TimestampColumnStatistics)cs).getMaximum());
#endif
}
writer.key("type").value(OrcProto.Type.Types.Kind.TIMESTAMP.ToString());
} else if (cs is DecimalColumnStatistics) {
if (((DecimalColumnStatistics)cs).getMaximum() != null)
{
#if false
writer.key("min").value(((DecimalColumnStatistics)cs).getMinimum());
writer.key("max").value(((DecimalColumnStatistics)cs).getMaximum());
writer.key("sum").value(((DecimalColumnStatistics)cs).getSum());
#endif
}
writer.key("type").value(OrcProto.Type.Types.Kind.DECIMAL.ToString());
}
}
}
private static void writeBloomFilterStats(JsonWriter writer, BloomFilter bf)
{
int bitCount = bf.getBitSize();
int popCount = 0;
foreach (long l in bf.getBitSet())
{
popCount += Long.NumberOfOnes(l);
}
int k = bf.getNumHashFunctions();
float loadFactor = (float)popCount / (float)bitCount;
float expectedFpp = (float)Math.Pow(loadFactor, k);
writer.key("numHashFunctions").value(k);
writer.key("bitCount").value(bitCount);
writer.key("popCount").value(popCount);
writer.key("loadFactor").value(loadFactor);
writer.key("expectedFpp").value(expectedFpp);
}
private static void writeBloomFilterIndexes(JsonWriter writer, int col,
OrcProto.BloomFilterIndex[] bloomFilterIndex)
{
BloomFilter stripeLevelBF = null;
if (bloomFilterIndex != null && bloomFilterIndex[col] != null)
{
int entryIx = 0;
writer.key("bloomFilterIndexes").array();
foreach (OrcProto.BloomFilter bf in bloomFilterIndex[col].BloomFilterList)
{
writer.newObject();
writer.key("entryId").value(entryIx++);
BloomFilter toMerge = BloomFilterIO.Create(bf);
writeBloomFilterStats(writer, toMerge);
if (stripeLevelBF == null)
{
stripeLevelBF = toMerge;
}
else
{
stripeLevelBF.merge(toMerge);
}
writer.endObject();
}
writer.endArray();
}
if (stripeLevelBF != null)
{
writer.key("stripeLevelBloomFilter");
writer.newObject();
writeBloomFilterStats(writer, stripeLevelBF);
writer.endObject();
}
}
