Package com.facebook.presto.spi.block

Examples of com.facebook.presto.spi.block.Block.cursor()

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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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        // create the block builder for the new boolean column
        // we know the exact size required for the block
        BlockBuilder blockBuilder = BOOLEAN.createFixedSizeBlockBuilder(page.getPositionCount());

        Block probeJoinBlock = page.getBlock(probeJoinChannel);
        BlockCursor probeJoinCursor = probeJoinBlock.cursor();

        // update hashing strategy to use probe cursor
        channelSet.setCurrentValue(probeJoinCursor);

        for (int position = 0; position < page.getPositionCount(); position++) {
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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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        assertEquals(output.getChannelCount(), 1);

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

        BlockCursor cursor = block.cursor();
        assertTrue(cursor.advanceNextPosition());
        if (cursor.isNull()) {
            return null;
        }
        else {
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                    }
                }

                // check equality of every position against every other position in the block cursor
                for (Block rightBlock : channel) {
                    BlockCursor rightCursor = rightBlock.cursor();
                    BlockCursor[] rightCursors = new BlockCursor[]{rightCursor};
                    while (rightCursor.advanceNextPosition()) {
                        assertEquals(
                                hashStrategy.positionEqualsCursors(leftBlockIndex, leftBlockPosition, rightCursors),
                                leftBlock.equalTo(leftBlockPosition, rightCursor));
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