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ctc_poc2026/specs/table_dependency_map.md

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表依赖关系与计算侧明细（严谨架构版）

依据：src/ 目录下核心表的最新实现逻辑 规则：严格区分 Level 1 (空间基础), Level 2 (指标原语), Level 3 (业务聚合)

一、 拓扑依赖图 (Total Topology)

graph TD
    %% 样式定义
    classDef source fill:#f96,stroke:#333,stroke-width:2px;
    classDef level1 fill:#dfd,stroke:#333,stroke-width:2px;
    classDef level2 fill:#dff,stroke:#333,stroke-width:2px;
    classDef level3 fill:#fdf,stroke:#333,stroke-width:2px;

    %% 数据源层
    ODS_MR[ODS MR 4G/5G]:::source
    ODS_OTT[ODS OTT 4G/5G]:::source
    ODS_OTT_GRID[ODS OTT GRID]:::source
    EXT_AOI[外部楼宇/场景 AOI]:::source

    %% Level 1: 空间底座与桥接表
    ODS_OTT_GRID --> td_grid:::level1
    td_grid --> td_building_grid_m:::level1
    td_grid --> td_scene_grid_m:::level1
    EXT_AOI --> td_building:::level1
    EXT_AOI --> td_scene:::level1
    
    %% 楼宇小区关系
    td_building_grid_m --> td_building_cell_m:::level1
    ODS_MR --> td_building_cell_m

    %% Level 2: 核心指标原语层
    ODS_MR --> tm_grid_coverage_m:::level2
    ODS_OTT --> tm_grid_coverage_m
    
    %% Level 3: 业务聚合分发层
    tm_grid_coverage_m --> tm_region_coverage_m:::level3
    
    tm_grid_coverage_m --> tm_building_coverage_m:::level3
    td_building_grid_m --> tm_building_coverage_m
    td_building_cell_m --> tm_building_coverage_m
    
    tm_grid_coverage_m --> tm_scene_coverage_m:::level3
    td_scene_grid_m --> tm_scene_coverage_m
    
    tm_grid_coverage_m --> tm_scene_grid_coverage_m:::level3
    td_scene_grid_m --> tm_scene_grid_coverage_m

    tm_grid_coverage_m --> tm_cluster_area_m:::level3

二、 物理依赖与计算侧明细

层级 表名 依赖项 (Upstream) 计算侧 核心逻辑备注
L1 td_grid ODS_OTT_GRID HiveSQL 定义全局 20x20 栅格坐标系
L1 td_building_grid_m td_building + td_grid PG PostGIS 楼宇-栅格点面关联桥接
L1 td_scene_grid_m td_scene + td_grid PG PostGIS 新增：场景-栅格点面关联桥接
L1 td_building_cell_m td_building_grid_m + ODS_MR HiveSQL 楼宇-小区映射
L2 tm_grid_coverage_m ODS MR + ODS OTT HiveSQL 原语层：产出 is_covered 标记
L3 tm_region_coverage_m tm_grid_coverage_m HiveSQL 行政区级联汇总 (Group Sets)
L3 tm_building_coverage_m tm_grid_coverage_m + 桥接表 HiveSQL 楼宇指标归集
L3 tm_scene_coverage_m tm_grid_coverage_m + 桥接表 HiveSQL 场景指标归集
L3 tm_scene_grid_coverage_m tm_grid_coverage_m + 桥接表 HiveSQL 场景栅格明细下钻
L3 tm_cluster_area_m tm_grid_coverage_m Hive/PG 覆盖黑洞聚类分析

三、 执行优先级 (Execution Pipeline)

  1. Priority 0: td_grid, td_building, td_scene (环境准备)。
  2. Priority 1: td_building_grid_m, td_scene_grid_m (关键桥接节点)。
  3. Priority 2: tm_grid_coverage_m (核心底表) 与 td_building_cell_m。
  4. Priority 3: 各业务聚合报表 (Region/Building/Scene)。