Help Center/ GaussDB/ Distributed_8.x/ SQL Reference/ SQL Syntax/ D/ DROP RESOURCE LABEL

Updated on 2024-06-03 GMT+08:00

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DROP RESOURCE LABEL

Description

DROP RESOURCE LABEL is used to delete a resource label.

Precautions

Only users with the POLADMIN or SYSADMIN permission, or the initial user can perform this operation.

Syntax

    
         DROP RESOURCE LABEL [IF EXISTS] label_name[, ...];

Parameters

label_name
Specifies the resource label name.

Value range: a string. It must comply with the naming convention.

Examples

    
         -- Create table tb_for_label.
gaussdb=# CREATE TABLE tb_for_label(col1 text, col2 text, col3 text);

-- Create a resource label based on a table.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS table_label add TABLE(public.tb_for_label);

-- Create an existing table resource label again and compare the differences between adding IF NOT EXISTS and not adding IF NOT EXISTS.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS table_label add TABLE(public.tb_for_label);
NOTICE:  table_label label already defined, skipping
CREATE RESOURCE LABEL
gaussdb=# CREATE RESOURCE LABEL table_label add TABLE(public.tb_for_label);
ERROR:  table_label label already defined

-- Create a resource label based on columns.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS column_label add COLUMN(public.tb_for_label.col1);

-- Create schema schema_for_label.
gaussdb=# CREATE SCHEMA schema_for_label;

-- Create a resource label based on a schema.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS schema_label add SCHEMA(schema_for_label);

-- Create view view_for_label.
gaussdb=# CREATE VIEW view_for_label AS SELECT 1;

-- Create a resource label based on a view.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS view_label add VIEW(view_for_label);

-- Create function func_for_label.
gaussdb=# CREATE FUNCTION func_for_label RETURNS TEXT AS $$ SELECT col1 FROM tb_for_label; $$ LANGUAGE SQL;

-- Create a resource label based on a function.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS func_label add FUNCTION(func_for_label);

-- Delete the table resource label table_label.
gaussdb=# DROP RESOURCE LABEL IF EXISTS table_label; 

-- Delete the column resource label column_label.
gaussdb=# DROP RESOURCE LABEL IF EXISTS column_label;

-- Delete the function resource label func_for_label.
gaussdb=# DROP FUNCTION func_for_label;

-- Delete the view resource label view_for_label.
gaussdb=# DROP VIEW view_for_label;

-- Delete the schema resource label schema_for_label.
gaussdb=# DROP SCHEMA schema_for_label;

-- Delete the tb_for_label table.
gaussdb=# DROP TABLE tb_for_label;