CREATE RESOURCE LABEL

Description

Creates a resource label.

Precautions

Only users with the poladmin or sysadmin permission, or the initial user can perform this operation.

Syntax

    
         CREATE RESOURCE LABEL [IF NOT EXISTS] label_name ADD label_item_list[, ...];

label_item_list
1

resource_type(resource_path[, ...])

resource_type

{ TABLE | COLUMN | SCHEMA | VIEW | FUNCTION }

Parameters

IF NOT EXISTS
If a resource label with the same name already exists, no error is generated. Instead, a message is displayed, indicating that the resource label already exists.

label_name
Specifies the resource label name, which must be unique.

Value range: a string. It must comply with the naming convention.
resource_type
Specifies the type of database resources to be labeled.

Value range: TABLE, COLUMN, SCHEMA, VIEW, and FUNCTION.
resource_path
Specifies the path of database resources.

Examples

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

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

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

-- 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 table.
gaussdb=# CREATE RESOURCE LABEL IF NOT EXISTS table_label add TABLE(public.tb_for_label);

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

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

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

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

-- Delete resource labels.
gaussdb=# DROP RESOURCE LABEL func_label, view_label, schema_label, column_label, table_label;

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

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

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

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