Examples of com.facebook.presto.sql.planner.ExpressionInterpreter

com.facebook.presto.sql.planner.ExpressionInterpreter

            return new Function<Expression, Expression>()
            {
                @Override
                public Expression apply(Expression expression)
                {
                    ExpressionInterpreter optimizer = ExpressionInterpreter.expressionOptimizer(expression, metadata, session);
                    return ExpressionInterpreter.toExpression(optimizer.optimize(NoOpSymbolResolver.INSTANCE));
                }
            };
        }

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            };
        }


        private Expression simplifyExpression(Expression input)
        {
            ExpressionInterpreter interpreter = ExpressionInterpreter.expressionOptimizer(input, metadata, session);
            return ExpressionInterpreter.toExpression(interpreter.optimize(NoOpSymbolResolver.INSTANCE));
        }

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        LookupSymbolResolver inputs = new LookupSymbolResolver(assignments.build());


        // If any conjuncts evaluate to FALSE or null, then the whole predicate will never be true and so the partition should be pruned
        for (Expression expression : extractConjuncts(predicate)) {
            ExpressionInterpreter optimizer = ExpressionInterpreter.expressionOptimizer(expression, metadata, session);
            Object optimized = optimizer.optimize(inputs);
            if (Boolean.FALSE.equals(optimized) || optimized == null) {
                return true;
            }
        }
        return false;

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        }


        // We use the optimizer to be able to produce a semantic exception if columns are referenced in the expression.
        // We can't do this with the interpreter yet because it's designed for the execution stage and has the wrong shape.
        // So, for now, we punt on supporting non-deterministic functions.
        ExpressionInterpreter samplePercentageEval = ExpressionInterpreter.expressionOptimizer(relation.getSamplePercentage(), metadata, session);


        Object samplePercentageObject = samplePercentageEval.optimize(new SymbolResolver()
        {
            @Override
            public Object getValue(Symbol symbol)
            {
                throw new SemanticException(NON_NUMERIC_SAMPLE_PERCENTAGE, relation.getSamplePercentage(), "Sample percentage cannot contain column references");

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        assertRoundTrip(expression);


        Expression parsedExpression = FunctionAssertions.createExpression(expression, METADATA, SYMBOL_TYPES);


        IdentityHashMap<Expression, Type> expressionTypes = getExpressionTypes(SESSION, METADATA, SQL_PARSER, SYMBOL_TYPES, parsedExpression);
        ExpressionInterpreter interpreter = expressionOptimizer(parsedExpression, METADATA, SESSION, expressionTypes);
        return interpreter.optimize(new SymbolResolver()
        {
            @Override
            public Object getValue(Symbol symbol)
            {
                switch (symbol.getName().toLowerCase()) {

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    }


    private static Object evaluate(Expression expression)
    {
        IdentityHashMap<Expression, Type> expressionTypes = getExpressionTypes(SESSION, METADATA, SQL_PARSER, SYMBOL_TYPES, expression);
        ExpressionInterpreter interpreter = expressionInterpreter(expression, METADATA, SESSION, expressionTypes);


        return interpreter.evaluate((RecordCursor) null);
    }

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        // verify roundtrip
        Expression roundtrip = createExpression(ExpressionFormatter.formatExpression(parsedExpression));
        assertEquals(parsedExpression, roundtrip);


        ExpressionInterpreter interpreter = ExpressionInterpreter.expressionOptimizer(parsedExpression, DUAL_METADATA_MANAGER, new Session("user", "test", DEFAULT_CATALOG, DEFAULT_SCHEMA, null, null));
        return interpreter.optimize(new SymbolResolver()
        {
            @Override
            public Object getValue(Symbol symbol)
            {
                switch (symbol.getName().toLowerCase()) {

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        return evaluate(parsedExpression);
    }


    private static Object evaluate(Expression expression)
    {
        ExpressionInterpreter interpreter = ExpressionInterpreter.expressionInterpreter(expression, DUAL_METADATA_MANAGER, new Session("user", "test", DEFAULT_CATALOG, DEFAULT_SCHEMA, null, null));


        return interpreter.evaluate((RecordCursor) null);
    }

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        }


        private Expression simplifyExpression(Expression input)
        {
            IdentityHashMap<Expression, Type> expressionTypes = getExpressionTypes(session, metadata, sqlParser, types, input);
            ExpressionInterpreter interpreter = ExpressionInterpreter.expressionOptimizer(input, metadata, session, expressionTypes);
            return LiteralInterpreter.toExpression(interpreter.optimize(NoOpSymbolResolver.INSTANCE), expressionTypes.get(input));
        }

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            {
                @Override
                public Expression apply(Expression expression)
                {
                    IdentityHashMap<Expression, Type> expressionTypes = getExpressionTypes(session, metadata, sqlParser, symbolAllocator.getTypes(), expression);
                    ExpressionInterpreter optimizer = ExpressionInterpreter.expressionOptimizer(expression, metadata, session, expressionTypes);
                    return LiteralInterpreter.toExpression(optimizer.optimize(NoOpSymbolResolver.INSTANCE), expressionTypes.get(expression));
                }
            };
        }

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