Examples with PageFilter io.prestosql.operator.project.PageFilter used on opensource projects

Example 1 with PageFilter

use of io.prestosql.operator.project.PageFilter in project hetu-core by openlookeng.

the class ExpressionCompiler method compilePageProcessor.

private Supplier<PageProcessor> compilePageProcessor(Optional<RowExpression> filter, List<? extends RowExpression> projections, Optional<String> classNameSuffix, OptionalInt initialBatchSize) {
    Optional<Supplier<PageFilter>> filterFunctionSupplier = filter.map(expression -> pageFunctionCompiler.compileFilter(expression, classNameSuffix));
    List<Supplier<PageProjection>> pageProjectionSuppliers = projections.stream().map(projection -> pageFunctionCompiler.compileProjection(projection, classNameSuffix)).collect(toImmutableList());
    return () -> {
        Optional<PageFilter> filterFunction = filterFunctionSupplier.map(Supplier::get);
        List<PageProjection> pageProjections = pageProjectionSuppliers.stream().map(Supplier::get).collect(toImmutableList());
        return new PageProcessor(filterFunction, pageProjections, initialBatchSize);
    };
}

Example 2 with PageFilter

use of io.prestosql.operator.project.PageFilter in project hetu-core by openlookeng.

the class PageFunctionCompiler method compileFilterInternal.

private Supplier<PageFilter> compileFilterInternal(RowExpression filter, Optional<String> classNameSuffix) {
    requireNonNull(filter, "filter is null");
    PageFieldsToInputParametersRewriter.Result result = rewritePageFieldsToInputParameters(filter);
    CallSiteBinder callSiteBinder = new CallSiteBinder();
    ClassDefinition classDefinition = defineFilterClass(result.getRewrittenExpression(), result.getInputChannels(), callSiteBinder, classNameSuffix);
    Class<? extends PageFilter> functionClass;
    try {
        functionClass = defineClass(classDefinition, PageFilter.class, callSiteBinder.getBindings(), getClass().getClassLoader());
    } catch (Exception e) {
        throw new PrestoException(COMPILER_ERROR, filter.toString(), e.getCause());
    }
    return () -> {
        try {
            return functionClass.getConstructor().newInstance();
        } catch (ReflectiveOperationException e) {
            throw new PrestoException(COMPILER_ERROR, e);
        }
    };
}