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dca53ce023
This change will allow row-batch.cc to use LZ4 codec. It will be implemented in a following patch. Change-Id: I9302da1b72c83fcf8420724138d40ad0d82c554b Reviewed-on: http://gerrit.ent.cloudera.com:8080/3030 Reviewed-by: Paden Tomasello <paden.tomasello@cloudera.com> Tested-by: jenkins Reviewed-on: http://gerrit.ent.cloudera.com:8080/3155
89 lines
2.6 KiB
Thrift
89 lines
2.6 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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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 "CatalogObjects.thrift"
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// Serialized, self-contained version of a RowBatch (in be/src/runtime/row-batch.h).
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struct TRowBatch {
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// total number of rows contained in this batch
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1: required i32 num_rows
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// row composition
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2: required list<Types.TTupleId> row_tuples
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// There are a total of num_rows * num_tuples_per_row offsets
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// pointing into tuple_data.
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// An offset of -1 records a NULL.
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3: list<i32> tuple_offsets
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// binary tuple data
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// TODO: figure out how we can avoid copying the data during TRowBatch construction
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4: string tuple_data
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// Indicates the type of compression used
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5: required CatalogObjects.THdfsCompression compression_type
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// Indicates the uncompressed size
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6:i32 uncompressed_size
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}
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// this is a union over all possible return types
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struct TColumnValue {
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1: optional bool bool_val
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6: optional byte byte_val
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7: optional i16 short_val
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2: optional i32 int_val
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3: optional i64 long_val
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4: optional double double_val
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5: optional string string_val
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8: optional binary binary_val
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}
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struct TResultRow {
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1: list<TColumnValue> colVals
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}
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// A union over all possible return types for a column of data
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// Currently only used by ExternalDataSource types
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struct TColumnData {
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// One element in the list for every row in the column indicating if there is
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// a value in the vals list or a null.
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1: required list<bool> is_null;
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// Only one is set, only non-null values are set.
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2: optional list<bool> bool_vals;
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3: optional list<byte> byte_vals;
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4: optional list<i16> short_vals;
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5: optional list<i32> int_vals;
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6: optional list<i64> long_vals;
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7: optional list<double> double_vals;
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8: optional list<string> string_vals;
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9: optional list<binary> binary_vals;
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}
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struct TResultSetMetadata {
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1: required list<CatalogObjects.TColumn> columns
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}
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// List of rows and metadata describing their columns.
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struct TResultSet {
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1: required list<TResultRow> rows
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2: required TResultSetMetadata schema
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}
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