Examples with PlainLongDictionaryValuesWriter org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainLongDictionaryValuesWriter used on opensource projects

Example 1 with PlainLongDictionaryValuesWriter

use of org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainLongDictionaryValuesWriter in project parquet-mr by apache.

the class TestDictionary method testLongDictionaryFallBack.

@Test
public void testLongDictionaryFallBack() throws IOException {
    int slabSize = 100;
    int maxDictionaryByteSize = 50;
    final FallbackValuesWriter<PlainLongDictionaryValuesWriter, PlainValuesWriter> cw = newPlainLongDictionaryValuesWriter(maxDictionaryByteSize, slabSize);
    // Fallbacked to Plain encoding, therefore use PlainValuesReader to read it back
    ValuesReader reader = new PlainValuesReader.LongPlainValuesReader();
    roundTripLong(cw, reader, maxDictionaryByteSize);
    // simulate cutting the page
    cw.reset();
    assertEquals(0, cw.getBufferedSize());
    cw.resetDictionary();
    roundTripLong(cw, reader, maxDictionaryByteSize);
}

Example 2 with PlainLongDictionaryValuesWriter

use of org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainLongDictionaryValuesWriter in project parquet-mr by apache.

the class TestDictionary method testLongDictionary.

@Test
public void testLongDictionary() throws IOException {
    int COUNT = 1000;
    int COUNT2 = 2000;
    final FallbackValuesWriter<PlainLongDictionaryValuesWriter, PlainValuesWriter> cw = newPlainLongDictionaryValuesWriter(10000, 10000);
    for (long i = 0; i < COUNT; i++) {
        cw.writeLong(i % 50);
    }
    BytesInput bytes1 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    for (long i = COUNT2; i > 0; i--) {
        cw.writeLong(i % 50);
    }
    BytesInput bytes2 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    DictionaryValuesReader cr = initDicReader(cw, PrimitiveTypeName.INT64);
    cr.initFromPage(COUNT, bytes1.toInputStream());
    for (long i = 0; i < COUNT; i++) {
        long back = cr.readLong();
        assertEquals(i % 50, back);
    }
    cr.initFromPage(COUNT2, bytes2.toInputStream());
    for (long i = COUNT2; i > 0; i--) {
        long back = cr.readLong();
        assertEquals(i % 50, back);
    }
}