Examples with GeneratedPageProjection com.facebook.presto.operator.project.GeneratedPageProjection used on opensource projects

Example 1 with GeneratedPageProjection

use of com.facebook.presto.operator.project.GeneratedPageProjection in project presto by prestodb.

the class PageFunctionCompiler method compileProjectionInternal.

private Supplier<PageProjection> compileProjectionInternal(SqlFunctionProperties sqlFunctionProperties, Map<SqlFunctionId, SqlInvokedFunction> sessionFunctions, List<RowExpression> projections, boolean isOptimizeCommonSubExpression, Optional<String> classNameSuffix) {
    requireNonNull(projections, "projections is null");
    checkArgument(!projections.isEmpty() && projections.stream().allMatch(projection -> projection instanceof CallExpression || projection instanceof SpecialFormExpression));
    PageFieldsToInputParametersRewriter.Result result = rewritePageFieldsToInputParameters(projections);
    List<RowExpression> rewrittenExpression = result.getRewrittenExpressions();
    CallSiteBinder callSiteBinder = new CallSiteBinder();
    // generate Work
    ClassDefinition pageProjectionWorkDefinition = definePageProjectWorkClass(sqlFunctionProperties, sessionFunctions, rewrittenExpression, callSiteBinder, isOptimizeCommonSubExpression, classNameSuffix);
    Class<? extends Work> pageProjectionWorkClass;
    try {
        pageProjectionWorkClass = defineClass(pageProjectionWorkDefinition, Work.class, callSiteBinder.getBindings(), getClass().getClassLoader());
    } catch (PrestoException prestoException) {
        throw prestoException;
    } catch (Exception e) {
        throw new PrestoException(COMPILER_ERROR, e);
    }
    return () -> new GeneratedPageProjection(rewrittenExpression, rewrittenExpression.stream().allMatch(determinismEvaluator::isDeterministic), result.getInputChannels(), constructorMethodHandle(pageProjectionWorkClass, List.class, SqlFunctionProperties.class, Page.class, SelectedPositions.class));
}