Package com.facebook.presto.operator

Examples of com.facebook.presto.operator.Page

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    private static Page[] offsetColumns(Page[] pages, int offset)
    {
        Page[] newPages = new Page[pages.length];
        for (int i = 0; i < pages.length; i++) {
            Page page = pages[i];
            if (page.getPositionCount() == 0) {
                newPages[i] = page;
            }
            else {
                Block[] newBlocks = new Block[page.getChannelCount() + offset];
                for (int channel = 0; channel < offset; channel++) {
                    newBlocks[channel] = new RunLengthEncodedBlock(NULL_BOOLEAN_TUPLE, page.getPositionCount());
                }
                for (int channel = 0; channel < page.getBlocks().length; channel++) {
                    newBlocks[channel + offset] = page.getBlocks()[channel];
                }
                newPages[i] = new Page(page.getPositionCount(), newBlocks);
            }
        }
        return newPages;
    }
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        else {
            valuesBlock = createDoublesBlock(values);
            percentilesBlock = new RunLengthEncodedBlock(createTuple(percentile), values.length);
        }

        return new Page(valuesBlock, percentilesBlock);
    }
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        else {
            valuesBlock = createLongsBlock(values);
            percentilesBlock = new RunLengthEncodedBlock(createTuple(percentile), values.length);
        }

        return new Page(valuesBlock, percentilesBlock);
    }
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            valuesBlock = createLongsBlock(values);
            weightsBlock = createLongsBlock(weights);
            percentilesBlock = new RunLengthEncodedBlock(createTuple(percentile), values.length);
        }

        return new Page(valuesBlock, weightsBlock, percentilesBlock);
    }
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            valuesBlock = createDoublesBlock(values);
            weightsBlock = createLongsBlock(weights);
            percentilesBlock = new RunLengthEncodedBlock(createTuple(percentile), values.length);
        }

        return new Page(valuesBlock, weightsBlock, percentilesBlock);
    }
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        return selectSingleValue(operator);
    }

    private Object selectSingleValue(Operator operator)
    {
        Page output = getAtMostOnePage(operator, SOURCE_PAGE);

        assertNotNull(output);
        assertEquals(output.getPositionCount(), 1);
        assertEquals(output.getChannelCount(), 1);
        Type type = operator.getTypes().get(0);

        Block block = output.getBlock(0);
        assertEquals(block.getPositionCount(), 1);

        return type.getObjectValue(session, block, 0);
    }
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        return executeFilter(operator);
    }

    private static boolean executeFilter(Operator operator)
    {
        Page page = getAtMostOnePage(operator, SOURCE_PAGE);

        boolean value;
        if (page != null) {
            assertEquals(page.getPositionCount(), 1);
            assertEquals(page.getChannelCount(), 1);

            assertTrue(page.getBoolean(operator.getTypes().get(0), 0, 0));
            value = true;
        }
        else {
            value = false;
        }
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        return value;
    }

    private static boolean executeFilterWithNoInputColumns(Operator operator)
    {
        Page page = getAtMostOnePage(operator, ZERO_CHANNEL_PAGE);

        boolean value;
        if (page != null) {
            assertEquals(page.getPositionCount(), 1);
            assertEquals(page.getChannelCount(), 0);
            value = true;
        }
        else {
            value = false;
        }
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        if (operator.needsInput()) {
            operator.addInput(sourcePage);
        }

        // try to get the output page
        Page result = operator.getOutput();

        // tell operator to finish
        operator.finish();

        // try to get output until the operator is finished
        while (!operator.isFinished()) {
            // operator should never block
            assertTrue(operator.isBlocked().isDone());

            Page output = operator.getOutput();
            if (output != null) {
                assertNull(result);
                result = output;
            }
        }
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        LookupSource lookupSource = lookupSourceFactoryFactory.createLookupSource(addresses, types, ImmutableList.of(channel), operatorContext);

        JoinProbeCompiler joinProbeCompiler = new JoinProbeCompiler();
        JoinProbeFactory probeFactory = joinProbeCompiler.internalCompileJoinProbe(types, Ints.asList(0));

        Page page = SequencePageBuilder.createSequencePage(types, 10, 10);
        JoinProbe joinProbe = probeFactory.createJoinProbe(lookupSource, page);

        // verify channel count
        assertEquals(joinProbe.getChannelCount(), 1);

        Block probeBlock = page.getBlock(0);
        PageBuilder pageBuilder = new PageBuilder(types);
        for (int position = 0; position < page.getPositionCount(); position++) {
            assertTrue(joinProbe.advanceNextPosition());

            joinProbe.appendTo(pageBuilder);

            assertEquals(joinProbe.getCurrentJoinPosition(), lookupSource.getJoinPosition(position, probeBlock));
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