---

{ “title”: “SHOW-VARIABLES”, “language”: “en” }

SHOW-VARIABLES

Name

SHOW VARIABLES

Description

This statement is used to display Doris system variables, which can be queried by conditions

grammar:

SHOW [GLOBAL | SESSION] VARIABLES
     [LIKE 'pattern' | WHERE expr]

illustrate:

• show variables is mainly used to view the values of system variables.
• Executing the SHOW VARIABLES command does not require any privileges, it only requires being able to connect to the server.
• Use the like statement to match with variable_name.
• The % percent wildcard can be used anywhere in the matching pattern

Example

1. The default here is to match the Variable_name, here is the exact match

   show variables like 'max_connections';
   

2. Matching through the percent sign (%) wildcard can match multiple items

   show variables like '%connec%';
   

3. Use the Where clause for matching queries

   show variables where variable_name = 'version';
   

Keywords

SHOW, VARIABLES

Best Practice