Package com.facebook.presto.byteCode

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

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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(ConnectorSession.class));

        ByteCodeNode body = compileExpression(bootstrap, projection, expressionTypes, sourceIsCursor, timeZoneKey, context, getSessionByteCode);

        projectionMethod
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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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                .putVariable(rowsVariable);

        List<LocalVariableDefinition> cursorVariables = new ArrayList<>();
        int channels = getMaxInputChannel(expressionTypes) + 1;
        for (int i = 0; i < channels; i++) {
            LocalVariableDefinition cursorVariable = compilerContext.declareVariable(BlockCursor.class, "cursor_" + i);
            cursorVariables.add(cursorVariable);
            filterAndProjectMethod.getBody()
                    .comment("BlockCursor %s = page.getBlock(%s).cursor();", cursorVariable.getName(), i)
                    .getVariable("page")
                    .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(ConnectorSession.class));
        ByteCodeExpressionVisitor visitor = new ByteCodeExpressionVisitor(metadata, bootstrap.getFunctionBinder(), expressionTypes, getSessionByteCode, sourceIsCursor, timeZoneKey);
        ByteCodeNode body = visitor.process(projection, context);

        projectionMethod
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        Block advanceNextPositionBody = classDefinition.declareMethod(compilerContext,
                a(PUBLIC),
                "advanceNextPosition",
                type(boolean.class))
                .getBody();
        LocalVariableDefinition advancedVariable = compilerContext.declareVariable(boolean.class, "advanced");

        advanceNextPositionBody
                .pushThis()
                .getField(cursorFields.get(0))
                .invokeInterface(BlockCursor.class, "advanceNextPosition", boolean.class)
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                type(int.class),
                arg("pagesIndex", PagesIndex.class),
                arg("leftPosition", int.class),
                arg("rightPosition", int.class));

        LocalVariableDefinition valueAddresses = compilerContext.declareVariable(LongArrayList.class, "valueAddresses");
        compareToMethod
                .getBody()
                .comment("LongArrayList valueAddresses = pagesIndex.valueAddresses")
                .getVariable("pagesIndex")
                .invokeVirtual(PagesIndex.class, "getValueAddresses", LongArrayList.class)
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                .comment("LongArrayList valueAddresses = pagesIndex.valueAddresses")
                .getVariable("pagesIndex")
                .invokeVirtual(PagesIndex.class, "getValueAddresses", LongArrayList.class)
                .putVariable(valueAddresses);

        LocalVariableDefinition leftPageAddress = compilerContext.declareVariable(long.class, "leftPageAddress");
        compareToMethod
                .getBody()
                .comment("long leftPageAddress = valueAddresses.getLong(leftPosition)")
                .getVariable(valueAddresses)
                .getVariable("leftPosition")
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