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clone_foreign_schema.go
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clone_foreign_schema.go
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package db_local
const cloneForeignSchemaSQL = `CREATE OR REPLACE FUNCTION clone_foreign_schema(
source_schema text,
dest_schema text,
plugin_name text)
RETURNS text AS
$BODY$
DECLARE
src_oid oid;
object text;
dest_table text;
table_sql text;
columns_sql text;
type_ text;
column_ text;
res text;
BEGIN
-- Check that source_schema exists
SELECT oid INTO src_oid
FROM pg_namespace
WHERE nspname = source_schema;
IF NOT FOUND
THEN
RAISE EXCEPTION 'source schema % does not exist!', source_schema;
RETURN '';
END IF;
-- Create schema
EXECUTE 'DROP SCHEMA IF EXISTS ' || dest_schema || ' CASCADE';
EXECUTE 'CREATE SCHEMA ' || dest_schema;
-- EXECUTE 'COMMENT ON SCHEMA ' || dest_schema || 'IS ''steampipe plugin: ' || plugin_name || '''';
EXECUTE 'GRANT USAGE ON SCHEMA ' || dest_schema || ' TO steampipe_users';
EXECUTE 'ALTER DEFAULT PRIVILEGES IN SCHEMA ' || dest_schema || ' GRANT SELECT ON TABLES TO steampipe_users';
-- Create tables
FOR object IN
SELECT TABLE_NAME::text
FROM information_schema.tables
WHERE table_schema = source_schema
AND table_type = 'FOREIGN'
LOOP
columns_sql := '';
FOR column_, type_ IN
SELECT column_name::text, data_type::text
FROM information_schema.COLUMNS
WHERE table_schema = source_schema
AND TABLE_NAME = object
LOOP
IF columns_sql <> ''
THEN
columns_sql = columns_sql || ',';
END IF;
columns_sql = columns_sql || quote_ident(column_) || ' ' || type_;
END LOOP;
dest_table := '"' || dest_schema || '".' || quote_ident(object);
table_sql :='CREATE FOREIGN TABLE ' || dest_table || ' (' || columns_sql || ') SERVER steampipe OPTIONS (table '|| $$'$$ || quote_ident(object) || $$'$$ || ') ';
EXECUTE table_sql;
SELECT CONCAT(res, table_sql, ';') into res;
END LOOP;
RETURN res;
END
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
`