267 lines
10 KiB
Python
267 lines
10 KiB
Python
# -*- coding: utf-8 -*-#
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# -------------------------------------------------------------------------------
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# Name: merge_db.py
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# Description:
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# Author: xaoyaoo
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# Date: 2023/12/03
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# -------------------------------------------------------------------------------
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import os
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import shutil
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import sqlite3
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import time
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def merge_copy_db(db_path, save_path):
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if isinstance(db_path, list) and len(db_path) == 1:
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db_path = db_path[0]
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if not os.path.exists(db_path):
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raise FileNotFoundError("目录不存在")
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shutil.move(db_path, save_path)
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# 合并相同名称的数据库 MSG0-MSG9.db
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def merge_msg_db(db_path: list, save_path: str, CreateTime: int = 0): # CreateTime: 从这个时间开始的消息 10位时间戳
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# 判断save_path是否为文件夹
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if os.path.isdir(save_path):
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save_path = os.path.join(save_path, "merge_MSG.db")
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merged_conn = sqlite3.connect(save_path)
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merged_cursor = merged_conn.cursor()
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for db_file in db_path:
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c_tabels = merged_cursor.execute(
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"select tbl_name from sqlite_master where type='table' and tbl_name!='sqlite_sequence'")
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tabels_all = c_tabels.fetchall() # 所有表名
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tabels_all = [row[0] for row in tabels_all]
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conn = sqlite3.connect(db_file)
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cursor = conn.cursor()
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# 创建表
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if len(tabels_all) < 4:
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cursor.execute(
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"select tbl_name,sql from sqlite_master where type='table' and tbl_name!='sqlite_sequence'")
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c_part = cursor.fetchall()
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for tbl_name, sql in c_part:
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if tbl_name in tabels_all:
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continue
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try:
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merged_cursor.execute(sql)
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tabels_all.append(tbl_name)
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except Exception as e:
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print(f"error: {db_file}\n{tbl_name}\n{sql}\n{e}\n**********")
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raise e
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merged_conn.commit()
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# 写入数据
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for tbl_name in tabels_all:
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if tbl_name == "MSG":
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MsgSvrIDs = merged_cursor.execute(
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f"select MsgSvrID from MSG where CreateTime>{CreateTime} and MsgSvrID!=0").fetchall()
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cursor.execute(f"PRAGMA table_info({tbl_name})")
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columns = cursor.fetchall()
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columns = [column[1] for column in columns[1:]]
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ex_sql = f"select {','.join(columns)} from {tbl_name} where CreateTime>{CreateTime} and MsgSvrID not in ({','.join([str(MsgSvrID[0]) for MsgSvrID in MsgSvrIDs])})"
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cursor.execute(ex_sql)
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insert_sql = f"INSERT INTO {tbl_name} ({','.join(columns)}) VALUES ({','.join(['?' for _ in range(len(columns))])})"
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try:
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merged_cursor.executemany(insert_sql, cursor.fetchall())
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except Exception as e:
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print(
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f"error: {db_file}\n{tbl_name}\n{insert_sql}\n{cursor.fetchall()}\n{len(cursor.fetchall())}\n{e}\n**********")
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raise e
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merged_conn.commit()
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else:
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ex_sql = f"select * from {tbl_name}"
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cursor.execute(ex_sql)
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for r in cursor.fetchall():
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cursor.execute(f"PRAGMA table_info({tbl_name})")
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columns = cursor.fetchall()
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if len(columns) > 1:
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columns = [column[1] for column in columns[1:]]
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values = r[1:]
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else:
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columns = [columns[0][1]]
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values = [r[0]]
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query_1 = "select * from " + tbl_name + " where " + columns[0] + "=?" # 查询语句 用于判断是否存在
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c2 = merged_cursor.execute(query_1, values)
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if len(c2.fetchall()) > 0: # 已存在
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continue
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query = "INSERT INTO " + tbl_name + " (" + ",".join(columns) + ") VALUES (" + ",".join(
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["?" for _ in range(len(values))]) + ")"
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try:
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merged_cursor.execute(query, values)
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except Exception as e:
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print(f"error: {db_file}\n{tbl_name}\n{query}\n{values}\n{len(values)}\n{e}\n**********")
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raise e
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merged_conn.commit()
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conn.close()
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sql = '''delete from MSG where localId in (SELECT localId from MSG
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where MsgSvrID != 0 and MsgSvrID in (select MsgSvrID from MSG
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where MsgSvrID != 0 GROUP BY MsgSvrID HAVING COUNT(*) > 1)
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and localId not in (select min(localId) from MSG
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where MsgSvrID != 0 GROUP BY MsgSvrID HAVING COUNT(*) > 1))'''
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c = merged_cursor.execute(sql)
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merged_conn.commit()
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merged_conn.close()
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return save_path
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def merge_media_msg_db(db_path: list, save_path: str):
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# 判断save_path是否为文件夹
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if os.path.isdir(save_path):
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save_path = os.path.join(save_path, "merge_Media.db")
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merged_conn = sqlite3.connect(save_path)
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merged_cursor = merged_conn.cursor()
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for db_file in db_path:
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s = "select tbl_name,sql from sqlite_master where type='table' and tbl_name!='sqlite_sequence'"
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have_tables = merged_cursor.execute(s).fetchall()
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have_tables = [row[0] for row in have_tables]
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conn_part = sqlite3.connect(db_file)
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cursor = conn_part.cursor()
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if len(have_tables) < 1:
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cursor.execute(s)
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table_part = cursor.fetchall()
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tblname, sql = table_part[0]
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sql = "CREATE TABLE Media(localId INTEGER PRIMARY KEY AUTOINCREMENT,Key TEXT,Reserved0 INT,Buf BLOB,Reserved1 INT,Reserved2 TEXT)"
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try:
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merged_cursor.execute(sql)
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have_tables.append(tblname)
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except Exception as e:
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print(f"error: {db_file}\n{tblname}\n{sql}\n{e}\n**********")
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raise e
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merged_conn.commit()
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for tblname in have_tables:
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s = "select Reserved0 from " + tblname
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merged_cursor.execute(s)
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r0 = merged_cursor.fetchall()
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ex_sql = f"select `Key`,Reserved0,Buf,Reserved1,Reserved2 from {tblname} where Reserved0 not in ({','.join([str(r[0]) for r in r0])})"
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cursor.execute(ex_sql)
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data = cursor.fetchall()
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insert_sql = f"INSERT INTO {tblname} (Key,Reserved0,Buf,Reserved1,Reserved2) VALUES ({','.join(['?' for _ in range(5)])})"
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try:
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merged_cursor.executemany(insert_sql, data)
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except Exception as e:
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print(f"error: {db_file}\n{tblname}\n{insert_sql}\n{data}\n{len(data)}\n{e}\n**********")
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raise e
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merged_conn.commit()
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conn_part.close()
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merged_conn.close()
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return save_path
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def attach_databases(connection, databases):
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"""
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将多个数据库附加到给定的SQLite连接。
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参数：
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-连接：SQLite连接
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-数据库：包含数据库别名和文件路径的词典
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"""
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cursor = connection.cursor()
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for alias, file_path in databases.items():
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attach_command = f"ATTACH DATABASE '{file_path}' AS {alias};"
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cursor.execute(attach_command)
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connection.commit()
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def execute_sql(connection, sql, params=None):
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"""
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执行给定的SQL语句，返回结果。
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参数：
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- connection： SQLite连接
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- sql：要执行的SQL语句
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- params：SQL语句中的参数
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"""
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cursor = connection.cursor()
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if params:
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cursor.execute(sql, params)
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else:
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cursor.execute(sql)
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return cursor.fetchall()
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def merge_db(db_paths, save_path="merge.db"):
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if os.path.isdir(save_path):
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save_path = os.path.join(save_path, f"merge_{int(time.time())}.db")
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if isinstance(db_paths, list):
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# alias, file_path
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databases = {f"MSG{i}": db_path for i, db_path in enumerate(db_paths)}
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elif isinstance(db_paths, str):
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databases = {"MSG": db_paths}
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else:
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raise TypeError("db_paths 类型错误")
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# 连接 MSG_ALL.db 数据库，并执行查询
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if len(databases) > 1:
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db = sqlite3.connect(":memory:")
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attach_databases(db, databases)
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else:
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db = sqlite3.connect(list(databases.values())[0])
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outdb = sqlite3.connect(save_path)
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out_cursor = outdb.cursor()
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# 将MSG_db_paths中的数据合并到out_db_path中
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for alias in databases:
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# 获取表名
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sql = f"SELECT name FROM {alias}.sqlite_master WHERE type='table' ORDER BY name;"
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tables = execute_sql(db, sql)
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for table in tables:
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table = table[0]
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if table == "sqlite_sequence":
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continue
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# 获取表中的数据
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sql = f"SELECT * FROM {alias}.{table}"
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data = execute_sql(db, sql)
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if len(data) < 1:
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continue
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# 获取表中的字段名
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sql = f"PRAGMA table_info({table})"
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columns = execute_sql(db, sql)
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columns = [i[1] for i in columns]
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if len(columns) < 1:
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continue
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# 检测表是否存在
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sql = f"SELECT name FROM sqlite_master WHERE type='table' AND name='{table}'"
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out_cursor.execute(sql)
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if len(out_cursor.fetchall()) < 1:
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# 创建表
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sql = f"CREATE TABLE IF NOT EXISTS {table} ({','.join(columns)})"
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out_cursor.execute(sql)
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# 创建包含 NULL 值比较的 UNIQUE 索引
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index_name = f"{table}_unique_index"
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coalesce_columns = ','.join(f"COALESCE({column}, '')" for column in columns) # 将 NULL 值转换为 ''
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sql = f"CREATE UNIQUE INDEX IF NOT EXISTS {index_name} ON {table} ({coalesce_columns})"
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out_cursor.execute(sql)
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# 插入数据
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sql = f"INSERT OR IGNORE INTO {table} VALUES ({','.join(['?'] * len(columns))})"
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out_cursor.executemany(sql, data)
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outdb.commit()
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outdb.close()
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# 断开数据库连接
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if len(databases) > 1:
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for alias in databases:
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db.execute(f"DETACH DATABASE {alias}")
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db.close()
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return save_path
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