Package com.facebook.presto.byteCode

Examples of com.facebook.presto.byteCode.CompilerContext.declareVariable()

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                arg("blocks", com.facebook.presto.block.Block[].class),
                arg("pageBuilder", PageBuilder.class));

        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition positionVariable = compilerContext.declareVariable(int.class, "position");

        LocalVariableDefinition rowsVariable = compilerContext.declareVariable(int.class, "rows");
        filterAndProjectMethod.getBody()
                .comment("int rows = blocks[0].getPositionCount();")
                .getVariable("blocks")
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        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition positionVariable = compilerContext.declareVariable(int.class, "position");

        LocalVariableDefinition rowsVariable = compilerContext.declareVariable(int.class, "rows");
        filterAndProjectMethod.getBody()
                .comment("int rows = blocks[0].getPositionCount();")
                .getVariable("blocks")
                .push(0)
                .getObjectArrayElement()
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                .putVariable(rowsVariable);

        List<LocalVariableDefinition> cursorVariables = new ArrayList<>();
        int channels = Ordering.natural().max(transform(inputTypes.keySet(), Input.channelGetter())) + 1;
        for (int i = 0; i < channels; i++) {
            LocalVariableDefinition cursorVariable = compilerContext.declareVariable(BlockCursor.class, "cursor_" + i);
            cursorVariables.add(cursorVariable);
            filterAndProjectMethod.getBody()
                    .comment("BlockCursor %s = blocks[%s].cursor();", cursorVariable.getName(), i)
                    .getVariable("blocks")
                    .push(i)
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                arg("cursor", RecordCursor.class),
                arg("pageBuilder", PageBuilder.class));

        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition completedPositionsVariable = compilerContext.declareVariable(int.class, "completedPositions");
        filterAndProjectMethod.getBody()
                .comment("int completedPositions = 0;")
                .putVariable(completedPositionsVariable, 0);

        //
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        projectionMethod.comment("Projection: %s", projection.toString());

        // generate body code
        CompilerContext context = projectionMethod.getCompilerContext();
        context.declareVariable(type(boolean.class), "wasNull");
        Block getSessionByteCode = new Block(context).pushThis().getField(classDefinition.getType(), "session", type(Session.class));
        TypedByteCodeNode body = new ByteCodeExpressionVisitor(bootstrapFunctionBinder, inputTypes, getSessionByteCode, sourceIsCursor).process(projection, context);

        if (body.getType() != void.class) {
            projectionMethod
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        if (fields.size() == 1) {
            generatePrimitiveDeserializer(deserializerBody, getSetter(clazz, fields.get(0)));
        }
        else {
            LocalVariableDefinition slice = compilerContext.declareVariable(Slice.class, "slice");
            deserializerBody.comment("Slice slice = block.getSlice(index);")
                    .getVariable("block")
                    .getVariable("index")
                    .invokeInterface(com.facebook.presto.spi.block.Block.class, "getSlice", Slice.class, int.class)
                    .putVariable(slice);
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        if (fields.size() == 1) {
            generatePrimitiveSerializer(serializerBody, getGetter(clazz, fields.get(0)));
        }
        else {
            LocalVariableDefinition slice = compilerContext.declareVariable(Slice.class, "slice");
            int size = serializedSizeOf(clazz);
            serializerBody.comment("Slice slice = Slices.allocate(%d);", size)
                    .push(size)
                    .invokeStatic(Slices.class, "allocate", Slice.class, int.class)
                    .putVariable(slice);
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                arg("page", com.facebook.presto.operator.Page.class),
                arg("pageBuilder", PageBuilder.class));

        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition positionVariable = compilerContext.declareVariable(int.class, "position");

        LocalVariableDefinition rowsVariable = compilerContext.declareVariable(int.class, "rows");
        filterAndProjectMethod.getBody()
                .comment("int rows = page.getPositionCount();")
                .getVariable("page")
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        CompilerContext compilerContext = filterAndProjectMethod.getCompilerContext();

        LocalVariableDefinition positionVariable = compilerContext.declareVariable(int.class, "position");

        LocalVariableDefinition rowsVariable = compilerContext.declareVariable(int.class, "rows");
        filterAndProjectMethod.getBody()
                .comment("int rows = page.getPositionCount();")
                .getVariable("page")
                .invokeVirtual(com.facebook.presto.operator.Page.class, "getPositionCount", int.class)
                .putVariable(rowsVariable);
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                .invokeVirtual(com.facebook.presto.operator.Page.class, "getPositionCount", int.class)
                .putVariable(rowsVariable);

        List<Integer> allInputChannels = getInputChannels(Iterables.concat(projections, ImmutableList.of(filter)));
        for (int channel : allInputChannels) {
            LocalVariableDefinition blockVariable = compilerContext.declareVariable(com.facebook.presto.spi.block.Block.class, "block_" + channel);
            filterAndProjectMethod.getBody()
                    .comment("Block %s = page.getBlock(%s);", blockVariable.getName(), channel)
                    .getVariable("page")
                    .push(channel)
                    .invokeVirtual(com.facebook.presto.operator.Page.class, "getBlock", com.facebook.presto.spi.block.Block.class, int.class)
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