NB-076
22 lines
827 B
Markdown
22 lines
827 B
Markdown
# 26-db-search — Database Search Simulation
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## 电信业务场景
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客户信息DB检索。使用索引文件模拟数据库检索，支持单键查询和范围查询，用于客户信息确认。
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## Purpose
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Simulates database search/retrieval patterns using GnuCOBOL INDEXED files with START + READ NEXT.
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## Test Coverage
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1. **Single key search** — READ with KEY IS for exact match retrieval
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2. **Range search** — START with NOT LESS THAN, iterate until upper bound
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3. **Full scan** — START from LOW-VALUES, read all records in key order
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4. **Range with no results** — START with no matching records
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## Key Techniques
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- INDEXED file with DYNAMIC access mode
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- START command for conditional positioning
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- READ NEXT for sequential traversal
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- KEY IS / GREATER THAN / NOT LESS THAN conditions
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- FILE STATUS checking
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