First experience of tryme in opengauss

stay openGauss2022 At the developer conference ,openGauss The community has launched an online experience and learning platform TryMe.TryMe The platform aims to provide a lightweight online operation platform for database enthusiasts , be based on openGauss Community openGauss-webclient Open source project creation , use Go Language development , With web The way of service provides services for developers , Help want to know and learn openGauss Quick contact with users openGauss.

As a programmer with a strong curiosity for new things , Of course, the author also went to play TryMe platform . Now the author will share with the majority of friends the first use TryMe Some experience of the platform .

TryMe The official website of the platform is https://tryme.opengauss.org, After logging into the official website, the first thing you see is the login page , As shown below ：

You can see from the login page ,TryMe Provides a variety of login authentication methods ,BUT, As a procedural ape , Of course, the first choice is to Gitee Login by authentication . Input Gitee Your account and password , After authorization, I entered TryMe The operation page of .

First you can see TryMe The page of is very clear and concise , For the author who has a paranoid aesthetic hobby , The page looks quite pleasing . Now let me lead you to experience TryMe The function of .

Get into TryMe Behind the platform , The first thing I see is SQL Operation page . At the top of the page is a big SQL Edit window area , Several function buttons in the middle , The lower part is the execution result display area . stay SQL There is data on the left side of the operation 、 Table structure 、 Index and constraint tabs , On the right side, there are two tabs, operation history and session .

Click the data tab , The prompt box shown below pops up , Prompt the user to select a table first .

Try clicking on the table structure 、 Index and constraint tabs , The same prompt message pops up . That's understandable , After all, these attributes are related to specific tables . Of course , It also shows that ,TryMe Display database or Schema Level index and constraint statistics .

Click the operation history on the right , You can see that the display operation history is empty , That's for sure , I haven't done anything yet .

Then click the session tab , You can see which sessions are currently connected to the database . As shown in the figure below , From the information shown, you can see the database connected by the session , The start time of the query in the session 、 Query execution status and query statement .

After reading the tab , Let's take a look at the functions of the sidebar .

As shown in the figure above , The sidebar provides for tables 、 View 、 Materialized view and menu display of sequence . You can see ,TryMe For the convenience of users , Preset in advance 6 A watch . The author clicks on one of them named bank_card After the table of , The data tab on the right automatically displays except bank_card Table data , meanwhile , Below the sidebar , It also shows some statistical information of the current table .

The data page provides the function of selecting and filtering data , You can select the columns to be filtered 、 Filter method and set filter value , For example, for b_type The column after filtering out the savings card is shown as follows .

Right click on the sidebar to display bank_card Table name , You can see TryMe The function of exporting data and the functions of emptying and deleting tables are provided for tables . Data can be exported as JSON、CSV as well as XML Three formats , It also supports exporting to SQL file .

Click export as SQL file , See what this function is . Open the exported SQL Results file , You can see that its content is to use gs_dump Exported logical backup statement . This file can be used gs_restore Directly in another openGauss Execution on node , To recover completely consistent data .

Let's use what we first saw SQL Operation function . Let's check client In the customer information listed in the table , Bank card account number and account category of each customer , stay SQL Enter the query statement in the edit window

```select client.c_name, client.c_phone, bank_card.b_number from client join bank_card on client.c_id = bank_card.b_c_id;```

In the process of entering a statement , The author was pleasantly surprised to find ,TryMe Of SQL In the operation window , Unexpectedly, it provides the function of Lenovo completion , It can be said to be very convenient and easy to use .

Enter the query statement and click execute , You can see the specific query results . And the result of the query , You can click in the middle JSON、CSV、XML Three buttons , Export the result value to the corresponding file format .

Explain queries and analyze queries , They correspond to each other openGauss Medium explain and analyze Two ways of execution . For example, select and click analysis query , In the result display box, you can see the execution plan of the query statement , And click csv Export the query results as CSV file .

The functions of explanation query and analysis query are SQL It is very useful in the development process , In particular, it needs to be positioned SQL The performance bottleneck of statement execution , The output of the execution plan can support developers to locate and repair problems quickly and effectively .

Okay , The above is about TryMe Simple experience of the platform for the first time , Welcome to login TryMe After experiencing on the platform , Scan the QR code below to enter openGauss TryMe Use the exchange group to discuss the experience of using the platform .

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