NB-076
74 lines
2.4 KiB
Markdown
74 lines
2.4 KiB
Markdown
# 31-validation-withdup: Field Validation with Duplicate Check
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## 电信业务场景
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重复CDR检测。对已按CDR-ID排序的明细文件进行WS-PREV-KEY重复检测，首次出现通过，同一ID再次出现判定为重复并拒否。
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## Description
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Reads a sorted input file and checks for duplicate KEY values using
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the WS-PREV-KEY pattern. The first occurrence of a key is written
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to FILE-OUT-GOOD. Any subsequent occurrence of the same key is
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written to FILE-OUT-BAD with an error code (duplicate detection).
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## Record Layout
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### Input / Good Output (35 bytes)
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| Field | Type | Length | Description |
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|--------|----------|--------|------------------|
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| KEY | PIC X | 5 | Sort key |
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| DATA | PIC X | 30 | Payload data |
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### Bad Output (37 bytes)
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| Field | Type | Length | Description |
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|--------|----------|--------|---------------------|
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| KEY | PIC X | 5 | Duplicated key |
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| DATA | PIC X | 30 | Original data |
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| ERR | PIC X | 2 | Error code ('01') |
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## Files
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| File | Purpose |
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|-----------------------------|----------------------------------|
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| main-31-validation-withdup.cbl | Main COBOL program |
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| data-gen.sh | Generate sorted test data |
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| run.sh | Compile, run, verify |
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| README.md | This file |
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## Test Data
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```
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KEY01 FIRST-RECORD -> PASS (1st unique)
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KEY02 SECOND-RECORD -> PASS (2nd unique)
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KEY03 FIRST-DUP-A -> PASS (1st)
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KEY03 SECOND-DUP-A -> FAIL (dup)
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KEY03 THIRD-DUP-A -> FAIL (dup)
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KEY04 UNIQUE-AFTER-DUP -> PASS (unique after dups)
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KEY05 DUP-GROUP-B-1ST -> PASS (1st)
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KEY05 DUP-GROUP-B-2ND -> FAIL (dup)
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KEY06 TRIPLE-GROUP-1ST -> PASS (1st)
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KEY06 TRIPLE-GROUP-2ND -> FAIL (dup)
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KEY06 TRIPLE-GROUP-3RD -> FAIL (dup)
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KEY99 LAST-UNIQUE -> PASS (final unique)
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```
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Expected: 7 good records, 5 bad records.
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## Usage
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```bash
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cd 31-validation-withdup
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bash data-gen.sh
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bash run.sh
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```
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## Expected Behavior
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- The first occurrence of each KEY is always accepted.
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- Subsequent occurrences of the same KEY are rejected as duplicates.
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- The WS-PREV-KEY is updated only when a record passes validation.
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- Duplicate records contain error code '01' in the BAD output.
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- Input must be sorted by KEY for correct sequential detection.
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