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9dc883b140
Change-Id: I63b59a896dc9dc0c9ed1d5e889f7b5626ba61202 Reviewed-on: http://gerrit.ent.cloudera.com:8080/3037 Reviewed-by: Alex Behm <alex.behm@cloudera.com> Tested-by: jenkins Reviewed-on: http://gerrit.ent.cloudera.com:8080/3124
78 lines
2.9 KiB
Thrift
78 lines
2.9 KiB
Thrift
// Copyright 2012 Cloudera Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// This file contains structures produced by the planner.
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namespace cpp impala
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namespace java com.cloudera.impala.thrift
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include "Types.thrift"
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include "Exprs.thrift"
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include "DataSinks.thrift"
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include "PlanNodes.thrift"
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include "Partitions.thrift"
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// TPlanFragment encapsulates info needed to execute a particular
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// plan fragment, including how to produce and how to partition its output.
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// It leaves out node-specific parameters neede for the actual execution.
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struct TPlanFragment {
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// display name to be shown in the runtime profile; unique within a query
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1: required string display_name
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// no plan or descriptor table: query without From clause
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2: optional PlanNodes.TPlan plan
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// exprs that produce values for slots of output tuple (one expr per slot);
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// if not set, plan fragment materializes full rows of plan_tree
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4: optional list<Exprs.TExpr> output_exprs
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// Specifies the destination of this plan fragment's output rows.
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// For example, the destination could be a stream sink which forwards
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// the data to a remote plan fragment, or a sink which writes to a table (for
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// insert stmts).
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5: optional DataSinks.TDataSink output_sink
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// Partitioning of the data created by all instances of this plan fragment;
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// partitioning.type has the following meaning:
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// - UNPARTITIONED: there is only one instance of the plan fragment
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// - RANDOM: a particular output row is randomly assigned to any of the instances
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// - HASH_PARTITIONED: output row r is produced by
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// hash_value(partitioning.partitioning_exprs(r)) % #partitions
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// - RANGE_PARTITIONING: currently not supported
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// This is distinct from the partitioning of each plan fragment's
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// output, which is specified by output_sink.output_partitioning.
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6: required Partitions.TDataPartition partition
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}
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// location information for a single scan range
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struct TScanRangeLocation {
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1: required Types.TNetworkAddress server
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// disk volume identifier of a particular scan range at 'server';
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// -1 indicates an unknown volume id;
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// only set for TScanRange.hdfs_file_split
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2: optional i32 volume_id = -1
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// If true, this block is cached on this server.
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3: optional bool is_cached = false
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}
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// A single scan range plus the hosts that serve it
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struct TScanRangeLocations {
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1: required PlanNodes.TScanRange scan_range
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// non-empty list
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2: list<TScanRangeLocation> locations
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}
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