Package com.facebook.presto.spi.block

Examples of com.facebook.presto.spi.block.BlockEncoding

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        VARCHAR.writeString(blockBuilder, "charlie");
        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new DictionaryEncoder(VARCHAR, new UncompressedEncoder(VARCHAR, sliceOutput)).append(block).append(block).append(block).finish();
        Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());

        BlockBuilder expectedBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus());
        VARCHAR.writeString(expectedBlockBuilder, "alice");
        VARCHAR.writeString(expectedBlockBuilder, "bob");
        VARCHAR.writeString(expectedBlockBuilder, "charlie");
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        DynamicSliceOutput compressedOutput = new DynamicSliceOutput(1024);
        Encoder encoder = BlocksFileEncoding.SNAPPY.createBlocksWriter(VARCHAR, compressedOutput);

        encoder.append(block);
        BlockEncoding snappyEncoding = encoder.finish();
        Block actualBlock = snappyEncoding.readBlock(compressedOutput.slice().getInput());
        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, block);
    }
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            encoder.append(block.getSingleValueBlock(position));
        }

        Block expectedBlock = expectedBlockBuilder.build();

        BlockEncoding snappyEncoding = encoder.finish();
        assertTrue(encoderOutput.size() < expectedBlock.getSizeInBytes());

        Block actualBlock = snappyEncoding.readBlock(encoderOutput.slice().getInput());

        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, expectedBlock);
    }
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    }

    private static Block copyBlock(Block block)
    {
        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = block.getEncoding();
        blockEncoding.writeBlock(sliceOutput, block);
        return blockEncoding.readBlock(sliceOutput.slice().getInput());
    }
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                .appendSlice(Slices.utf8Slice("charlie"))
                .build()
                .toRandomAccessBlock();

        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new RunLengthEncoder(sliceOutput).append(expectedBlock).finish();
        SliceInput sliceInput = sliceOutput.slice().getInput();

        Block block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        RunLengthEncodedBlock rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(rleBlock.equalTo(0, expectedBlock, 0));
        assertEquals(rleBlock.getPositionCount(), 2);
        assertEquals(rleBlock.getSlice(0).toStringUtf8(), "alice");

        block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(rleBlock.equalTo(0, expectedBlock, 2));
        assertEquals(rleBlock.getPositionCount(), 4);
        assertEquals(rleBlock.getSlice(0).toStringUtf8(), "bob");

        block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(rleBlock.equalTo(0, expectedBlock, 6));
        assertEquals(rleBlock.getPositionCount(), 6);
        assertEquals(rleBlock.getSlice(0).toStringUtf8(), "charlie");
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        DynamicSliceOutput compressedOutput = new DynamicSliceOutput(1024);
        Encoder encoder = BlocksFileEncoding.SNAPPY.createBlocksWriter(compressedOutput);

        encoder.append(block);
        BlockEncoding snappyEncoding = encoder.finish();
        Block actualBlock = snappyEncoding.readBlock(compressedOutput.slice().getInput());
        BlockAssertions.assertBlockEquals(actualBlock, block);
    }
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            encoder.append(block.getSingleValueBlock(position));
        }

        Block expectedBlock = expectedBlockBuilder.build();

        BlockEncoding snappyEncoding = encoder.finish();
        assertTrue(encoderOutput.size() < expectedBlock.getSizeInBytes());

        Block actualBlock = snappyEncoding.readBlock(encoderOutput.slice().getInput());

        BlockAssertions.assertBlockEquals(actualBlock, expectedBlock);
    }
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        }

        @Override
        public SnappyBlockEncoding readEncoding(TypeManager manager, BlockEncodingSerde serde, SliceInput input)
        {
            BlockEncoding valueBlockEncoding = serde.readBlockEncoding(input);
            return new SnappyBlockEncoding(valueBlockEncoding);
        }
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        }

        @Override
        public RunLengthBlockEncoding readEncoding(TypeManager manager, BlockEncodingSerde serde, SliceInput input)
        {
            BlockEncoding valueBlockEncoding = serde.readBlockEncoding(input);
            return new RunLengthBlockEncoding(valueBlockEncoding);
        }
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        @Override
        public DictionaryBlockEncoding readEncoding(TypeManager manager, BlockEncodingSerde serde, SliceInput input)
        {
            // read the dictionary
            BlockEncoding dictionaryEncoding = serde.readBlockEncoding(input);
            Block dictionary = dictionaryEncoding.readBlock(input);

            // read the id block encoding
            BlockEncoding idBlockEncoding = serde.readBlockEncoding(input);
            return new DictionaryBlockEncoding(dictionary, idBlockEncoding);
        }
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Related Classes of com.facebook.presto.spi.block.BlockEncoding

  • com.facebook.presto.block.AbstractTestBlock
  • com.facebook.presto.block.dictionary.DictionaryBlockEncoding$DictionaryBlockEncodingFactory
  • com.facebook.presto.block.rle.RunLengthBlockEncoding$RunLengthBlockEncodingFactory
  • com.facebook.presto.block.snappy.SnappyBlockEncoding$SnappyBlockEncodingFactory
  • com.facebook.presto.serde.BlocksFileWriter
  • com.facebook.presto.serde.PagesSerde$PagesWriter
  • com.facebook.presto.serde.TestDictionaryEncodedBlockSerde
  • com.facebook.presto.serde.TestRunLengthEncodedBlockSerde
  • com.facebook.presto.serde.TestSnappyBlockSerde
  • com.facebook.presto.serde.TestUncompressedBlockSerde
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