v1: executing-plans 模式生成，54 文件 1320 行 Python

comparator/aligner.py

@@ -0,0 +1,54 @@
+from typing import Optional
+
+
+def align_records(
+    cobol_records: list[dict],
+    java_records: list[dict],
+    key_field: str = "CUST-ID"
+) -> list[tuple]:
+    """Align records by key field. Returns list of (cobol, java, status)."""
+    if not cobol_records and not java_records:
+        return []
+
+    cobol_by_key = {}
+    for i, r in enumerate(cobol_records):
+        k = r.get(key_field)
+        k = _normalize_key(k)
+        if k not in cobol_by_key:
+            cobol_by_key[k] = []
+        cobol_by_key[k].append(r)
+
+    java_by_key = {}
+    for i, r in enumerate(java_records):
+        k = r.get(key_field)
+        k = _normalize_key(k)
+        if k not in java_by_key:
+            java_by_key[k] = []
+        java_by_key[k].append(r)
+
+    pairs = []
+    all_keys = set(list(cobol_by_key.keys()) + list(java_by_key.keys()))
+
+    for key in all_keys:
+        cobol_items = cobol_by_key.get(key, [])
+        java_items = java_by_key.get(key, [])
+        max_len = max(len(cobol_items), len(java_items))
+
+        for i in range(max_len):
+            c = cobol_items[i] if i < len(cobol_items) else None
+            j = java_items[i] if i < len(java_items) else None
+
+            if c is not None and j is not None:
+                pairs.append((c, j, "MATCHED"))
+            elif c is not None:
+                pairs.append((c, None, "MISSING_IN_SPARK"))
+            else:
+                pairs.append((None, j, "EXTRA_IN_SPARK"))
+
+    return pairs
+
+
+def _normalize_key(key) -> str:
+    if key is None:
+        return "__NONE__"
+    return str(key)