notebook

2025-10-06 17:49:09 +02:00
parent 97a678ef4a
commit 4cbf44c9c9
4 changed files with 422 additions and 0 deletions
@@ -0,0 +1,161 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import fdb
+from pathlib import Path
+
+# ================== CONFIG ==================
+DB_PATH = r"u:\MEDICUS 3\data\medicus.FDB"
+HOST = "localhost"
+USER = "sysdba"
+PASSWORD = "masterkey"
+LOG_FILE = Path("dropped_tables_full.txt")
+# ============================================
+
+con = fdb.connect(
+    host=HOST,
+    database=DB_PATH,
+    user=USER,
+    password=PASSWORD,
+    charset="WIN1250",
+)
+cur = con.cursor()
+
+print("💣 Aggressively removing all empty tables and their dependencies...")
+
+# ---------------------------------------------------------------------
+# Helper functions
+# ---------------------------------------------------------------------
+def commit_safe():
+    try:
+        con.commit()
+    except Exception as e:
+        print(f"   ⚠️ Commit failed: {e}")
+        con.rollback()
+
+def drop_objects(sql_query: str, drop_sql_template: str, obj_type: str, table_name: str):
+    """Generic dropper for dependent objects (views, triggers, procedures)."""
+    cur.execute(sql_query)
+    objs = [r[0].strip() for r in cur.fetchall()]
+    for name in objs:
+        stmt = drop_sql_template.format(name=name)
+        try:
+            print(f"   🔧 Dropping {obj_type}: {name}")
+            con.execute_immediate(stmt)
+            commit_safe()
+        except Exception as e:
+            print(f"      ⚠️ Could not drop {obj_type} {name}: {e}")
+            con.rollback()
+
+def drop_fk_constraints_referring_to(table_name: str):
+    cur.execute(f"""
+        SELECT TRIM(rc.rdb$relation_name), TRIM(rc.rdb$constraint_name)
+        FROM rdb$relation_constraints rc
+        JOIN rdb$ref_constraints ref ON ref.rdb$constraint_name = rc.rdb$constraint_name
+        JOIN rdb$relation_constraints pk ON pk.rdb$constraint_name = ref.rdb$const_name_uq
+        WHERE rc.rdb$constraint_type = 'FOREIGN KEY'
+          AND UPPER(pk.rdb$relation_name) = '{table_name.upper()}'
+    """)
+    for fk_table, fk_name in cur.fetchall():
+        stmt = f'ALTER TABLE {fk_table} DROP CONSTRAINT {fk_name}'
+        try:
+            print(f"   🔧 Dropping FK {fk_name} in {fk_table}")
+            con.execute_immediate(stmt)
+            commit_safe()
+        except Exception as e:
+            print(f"      ⚠️ Could not drop FK {fk_name} in {fk_table}: {e}")
+            con.rollback()
+
+# ---------------------------------------------------------------------
+# Collect all user tables
+# ---------------------------------------------------------------------
+cur.execute("""
+    SELECT TRIM(rdb$relation_name)
+    FROM rdb$relations
+    WHERE rdb$system_flag = 0
+    ORDER BY 1
+""")
+tables = [r[0] for r in cur.fetchall()]
+
+dropped, skipped = [], []
+
+# ---------------------------------------------------------------------
+# Main loop
+# ---------------------------------------------------------------------
+for t in tables:
+    try:
+        cur.execute(f"SELECT COUNT(*) FROM {t}")
+        count = cur.fetchone()[0]
+    except Exception as e:
+        print(f"⚠️ Skipping {t}: {e}")
+        continue
+
+    if count > 0:
+        continue
+
+    print(f"\n🧹 {t} → empty, removing dependencies and dropping...")
+
+    # 1️⃣ Drop foreign keys referencing this table
+    drop_fk_constraints_referring_to(t)
+
+    # 2️⃣ Drop views referencing this table
+    drop_objects(
+        sql_query=f"""
+            SELECT TRIM(rdb$view_name)
+            FROM rdb$view_relations
+            WHERE UPPER(rdb$relation_name) = '{t.upper()}'
+        """,
+        drop_sql_template="DROP VIEW {name}",
+        obj_type="view",
+        table_name=t
+    )
+
+    # 3️⃣ Drop triggers whose source mentions this table
+    drop_objects(
+        sql_query=f"""
+            SELECT TRIM(rdb$trigger_name)
+            FROM rdb$triggers
+            WHERE rdb$trigger_source CONTAINING '{t.upper()}'
+        """,
+        drop_sql_template="DROP TRIGGER {name}",
+        obj_type="trigger",
+        table_name=t
+    )
+
+    # 4️⃣ Drop stored procedures referencing this table
+    drop_objects(
+        sql_query=f"""
+            SELECT TRIM(rdb$procedure_name)
+            FROM rdb$procedures
+            WHERE rdb$procedure_source CONTAINING '{t.upper()}'
+        """,
+        drop_sql_template="DROP PROCEDURE {name}",
+        obj_type="procedure",
+        table_name=t
+    )
+
+    # 5️⃣ Finally, drop the table itself
+    try:
+        con.execute_immediate(f"DROP TABLE {t}")
+        commit_safe()
+        dropped.append(t)
+        print(f"   ✅ Dropped table {t}")
+    except Exception as e:
+        print(f"   ⚠️ Could not drop {t}: {e}")
+        con.rollback()
+        skipped.append(t)
+
+con.close()
+
+# ---------------------------------------------------------------------
+# Log results
+# ---------------------------------------------------------------------
+LOG_FILE.write_text(
+    "=== DROPPED TABLES ===\n" + "\n".join(dropped) +
+    "\n\n=== SKIPPED TABLES ===\n" + "\n".join(skipped),
+    encoding="utf-8"
+)
+print("\n✅ Done.")
+print(f"Total dropped: {len(dropped)}")
+print(f"Skipped: {len(skipped)}")
+print(f"Log saved to {LOG_FILE.resolve()}")