Advanced performance test series "24. Execute SQL script through JDBC"

Catalog

• One 、 JDBC(JavaDataBaseConnectivity) 1.jdbc：java Call the database's .2. How to find jar package ？3.mysql edition 8 And mysql edition 5.7 Of jar Is there any difference in the package ？

• Two 、 Write the script 1. Add configuration components -- JDBC Connection Configuration .2.jdbc request

• 3、 ... and 、 Be careful

One 、 JDBC(JavaDataBaseConnectivity) :

• It's one for execution SQL Of the statement JAVA API .

• Through this api Can be executed directly sql Script .

1.jdbc：java Call the database's .

When calling the database , Need to use jar package （jar Bag is java The low-level call class that the language has written ）, Fill in the information of the database .
jmeter Yes, it is java Developed , Can be executed directly java Code .

2. How to find jar package ？

The database version of a project is mysql5.7, So choose a version number greater than 5.7 Of jar A bag will do .
Access the service maven Warehouse address ： https://mvnrepository.com/ , Then search the database .
Find the version you need , Click on the version . Files--jar , Download this jar package .

here , Download it locally .
Download the jar package , Put it in jmeter Of lib In the folder .

restart jmeter, here , You can write jdbc Request the .
To have this jar After the package ,jmeter Can initiate jdbc request , Without this jar package , There's this one, too jdbc Sampler , however , Cannot initiate request .
jar Bao is a third party library .

3.mysql edition 8 And mysql edition 5.7 Of jar Is there any difference in the package ？

Now in the enterprise , With mysql database , It's usually mysql5.7 The above version and mysql8.
mysql5.7 Version and mysql5.7 The performance of previous versions is different .
mysql5 Version of ： You can choose a database version greater than or equal to yours Arbitrarily jar package .
mysql8 edition ： Choose a database version number that is greater than or equal to yours , General situation , Select the same version number jar package .
mysql8 And mysql5 The driver class Dissimilarity .

Two 、 Write the script

1. Add configuration components -- JDBC Connection Configuration .

Fill in the database ： ip 、 port 、 dbname 、 user 、 password 、 pool 、 Character set 、 Drive class ......
variable name for created pool ： Customize a thread pool variable name .
Variable name naming rules ： Letter 、 Numbers 、 Underline . Cannot start with a number .
database Connection Configuration Database connection configuration .
database URL : Fill in the database ip、 port 、dbname. however , Different databases URL The address is written differently .
mysql Of url Address ：jdbc:mysql://serverip:port/dbname .

mysql Database default port ：3306, The database port of a project is ：3337.
jdbc driver class ： Different databases , This drive class Dissimilarity .
mysql5 The driver class（ It's optional ）: com.mysql.jdbc.Driver . Only applicable to mysql5 edition .
mysql8 The driver class（ It's handwritten ）： com.mysql.cj.jdbc.Driver . compatible mysql5 edition .

2.jdbc request

Connection pool ： Be sure to make contact with JDBC Connection Configuration The connection pool names configured in should be consistent .

sql query：

select \* from cb_account limit 10

Running results View the result tree in the process of receiving data , Is to consume resources , Rendering also consumes resources . Large amount of data , It will take longer .
When you really do performance testing , You can do without a monitor .

Script link ：

link ：https://pan.baidu.com/s/1yb1Y-HeVG7QQboL5eeQkRQ?pwd=1234 Extraction code ：1234

3、 ... and 、 Be careful

One by one s It's a variable , count() It can follow the value , Not with variables . therefore , count() You can write any value .

chart 1：count("A"), The successful running .

chart 2：count(99), The successful running .

chart 3：count(s)

chart 3： Run failed .

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