Lu, Huayi a24ca60074 DWS DEVELOPER 811 version

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>

2023-01-19 13:37:49 +00:00

7.3 KiB

Raw Permalink Blame History

DO

Function

DO executes an anonymous code block.

A code block is a function body without parameters that returns void. It is analyzed and executed at the same time.

Precautions

Before using a programming language, install it in the current database using CREATE LANGUAGE. If no language is specified, plpgsql is installed by default.
To use an untrusted language, you must be a system administrator or have the USAGE permission for programming languages.

Syntax

1
DO [ LANGUAGE lang_name ] code;

Parameter Description

lang_name
Parses the programming language used by the code. If not specified, the default value plpgsql is used.
code
Specifies executable programming language code. The language is specified as a string.

Examples

Grant user webuser all the operation permissions on views in the tpcds schema.

1
2
3
4
5
6
7
8
DO $$DECLARE r record;
BEGIN
    FOR r IN SELECT c.relname,n.nspname FROM pg_class c,pg_namespace n 
             WHERE c.relnamespace = n.oid AND n.nspname = 'tpcds' AND relkind IN ('r','v')
    LOOP
        EXECUTE 'GRANT ALL ON ' || quote_ident(r.table_schema) || '.' || quote_ident(r.table_name) || ' TO webuser';
    END LOOP;
END$$;

Parent topic: DCL Syntax

7.3 KiB Raw Permalink Blame History

DO