python SQLAlchemy 查询慢sql

1.config文件添加如下配置

FLASKY_DB_QUERY_TIMEOUT = 0.1  # 设置sql执行超时时间 0.1s
SQLALCHEMY_RECORD_QUERIES = True  # 启用慢查询记录功能

2.public文件添加如下代码,可将 打印的语句个性化输出

 

from flask_sqlalchemy import SQLAlchemy,get_debug_queries

@app.after_request
def after_request(response):
    for query in get_debug_queries():
        print(query.statement,query.duration)
        if query.duration >= app.config['FLASKY_DB_QUERY_TIMEOUT']:
             # query.statement：查询的sql
             # query.duration： 耗时
             # 打印超时sql和时间
             print('----慢sql-----\t\nsql:\t\n {sql} \t\n耗时:{duration}'.format(sql=query.statement,duration=query.duration))
    return response

3、完整的 public文件代码如下：

from flask import Flask
from flask_sqlalchemy import SQLAlchemy,get_debug_queries
import config

app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)

@app.after_request
def after_request(response):
    for query in get_debug_queries():
        if query.duration >= app.config['FLASKY_DB_QUERY_TIMEOUT']:
            # query.statement：查询的sql
            # query.duration： 耗时
            # 打印超时sql和时间
            print('----慢sql-----\t\nsql:\t\n {sql} \n\t耗时:{duration}'.format(sql=query.statement,duration=query.duration)
    return response