use of com.facebook.presto.spi.plan.LimitNode.Step.FINAL in project presto by prestodb.
the class LogicalPlanner method createTableWriterPlan.
private RelationPlan createTableWriterPlan(Analysis analysis, RelationPlan plan, WriterTarget target, List<String> columnNames, List<ColumnMetadata> columnMetadataList, Optional<NewTableLayout> writeTableLayout, Optional<NewTableLayout> preferredShuffleLayout, TableStatisticsMetadata statisticsMetadata) {
verify(!(writeTableLayout.isPresent() && preferredShuffleLayout.isPresent()), "writeTableLayout and preferredShuffleLayout cannot both exist");
PlanNode source = plan.getRoot();
if (!analysis.isCreateTableAsSelectWithData()) {
source = new LimitNode(source.getSourceLocation(), idAllocator.getNextId(), source, 0L, FINAL);
}
List<VariableReferenceExpression> variables = plan.getFieldMappings();
Optional<PartitioningScheme> tablePartitioningScheme = getPartitioningSchemeForTableWrite(writeTableLayout, columnNames, variables);
Optional<PartitioningScheme> preferredShufflePartitioningScheme = getPartitioningSchemeForTableWrite(preferredShuffleLayout, columnNames, variables);
verify(columnNames.size() == variables.size(), "columnNames.size() != variables.size(): %s and %s", columnNames, variables);
Map<String, VariableReferenceExpression> columnToVariableMap = zip(columnNames.stream(), plan.getFieldMappings().stream(), SimpleImmutableEntry::new).collect(toImmutableMap(Entry::getKey, Entry::getValue));
Set<VariableReferenceExpression> notNullColumnVariables = columnMetadataList.stream().filter(column -> !column.isNullable()).map(ColumnMetadata::getName).map(columnToVariableMap::get).collect(toImmutableSet());
if (!statisticsMetadata.isEmpty()) {
TableStatisticAggregation result = statisticsAggregationPlanner.createStatisticsAggregation(statisticsMetadata, columnToVariableMap, true);
StatisticAggregations.Parts aggregations = result.getAggregations().splitIntoPartialAndFinal(variableAllocator, metadata.getFunctionAndTypeManager());
TableFinishNode commitNode = new TableFinishNode(source.getSourceLocation(), idAllocator.getNextId(), new TableWriterNode(source.getSourceLocation(), idAllocator.getNextId(), source, Optional.of(target), variableAllocator.newVariable("rows", BIGINT), variableAllocator.newVariable("fragments", VARBINARY), variableAllocator.newVariable("commitcontext", VARBINARY), plan.getFieldMappings(), columnNames, notNullColumnVariables, tablePartitioningScheme, preferredShufflePartitioningScheme, // the data consumed by the TableWriteOperator
Optional.of(aggregations.getPartialAggregation())), Optional.of(target), variableAllocator.newVariable("rows", BIGINT), // by the partial aggregation from all of the writer nodes
Optional.of(aggregations.getFinalAggregation()), Optional.of(result.getDescriptor()));
return new RelationPlan(commitNode, analysis.getRootScope(), commitNode.getOutputVariables());
}
TableFinishNode commitNode = new TableFinishNode(source.getSourceLocation(), idAllocator.getNextId(), new TableWriterNode(source.getSourceLocation(), idAllocator.getNextId(), source, Optional.of(target), variableAllocator.newVariable("rows", BIGINT), variableAllocator.newVariable("fragments", VARBINARY), variableAllocator.newVariable("commitcontext", VARBINARY), plan.getFieldMappings(), columnNames, notNullColumnVariables, tablePartitioningScheme, preferredShufflePartitioningScheme, Optional.empty()), Optional.of(target), variableAllocator.newVariable("rows", BIGINT), Optional.empty(), Optional.empty());
return new RelationPlan(commitNode, analysis.getRootScope(), commitNode.getOutputVariables());
}
Aggregations