Zhenchi
2ffdcae9f9
* feat: add `InvertedIndexFooter` Signed-off-by: Zhenchi <zhongzc_arch@outlook.com> * feat: map instead of list Signed-off-by: Zhenchi <zhongzc_arch@outlook.com> * fix: add rust mod Signed-off-by: Zhenchi <zhongzc_arch@outlook.com> * chore: rename InvertedIndexFooter to InvertedIndexMetas Signed-off-by: Zhenchi <zhongzc_arch@outlook.com> * chore: add java outer classname option Signed-off-by: Zhenchi <zhongzc_arch@outlook.com> --------- Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>
75 lines
2.8 KiB
Protocol Buffer
75 lines
2.8 KiB
Protocol Buffer
// Copyright 2023 Greptime Team
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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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syntax = "proto3";
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package greptime.v1.index;
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option java_package = "io.greptime.v1.index";
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option java_outer_classname = "Index";
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option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1/index";
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// InvertedIndexMetas defines the metadata for an inverted index
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// within an SST file.
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message InvertedIndexMetas {
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// A map of tag names to their respective metadata corresponding to an individual
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// inverted index within the SST file.
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map<string, InvertedIndexMeta> metas = 1;
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}
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// InvertedIndexMeta contains the metadata for a specific tag's inverted index.
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message InvertedIndexMeta {
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// Name of the tag associated with the inverted index.
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string name = 1;
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// Defines the number of rows per group for bitmap indexing. It determines how rows
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// are batched for indexing, with each batch corresponding to a segment in the bitmap.
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// The groups are usually of uniform size, with the exception of the final group which
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// may contain fewer rows if the total row count is not a multiple of 'row_count_in_group'.
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// Segmenting allows indexed values in the tag column to be quickly located within
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// their respective groups during a query, reducing the search space and improving
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// retrieval efficiency.
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uint64 row_count_in_group = 2;
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// The byte offset of the Finite State Transducer (FST) within the SST file.
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uint64 fst_offset = 3;
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// The size in bytes of the FST data.
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uint64 fst_size = 4;
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// The byte offset where the null bitmap for this tag starts.
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uint64 null_bitmap_offset = 5;
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// The size in bytes of the null bitmap.
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uint64 null_bitmap_size = 6;
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// Statistical information about the tag's inverted index.
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InvertedIndexStats stats = 7;
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}
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// InvertedIndexStats provides statistical data on a tag's inverted index.
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message InvertedIndexStats {
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// The count of null entries within the tag's column.
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uint64 null_count = 1;
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// The number of distinct values within the tag's column.
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uint64 distinct_count = 2;
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// The minimum value found within the tag's column, encoded as bytes.
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bytes min_value = 3;
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// The maximum value found within the tag's column, encoded as bytes.
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bytes max_value = 4;
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}
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