Merge pull request #385 from CartoDB/federated_functions_permissions
Federated functions permissions
This commit is contained in:
Raúl Marín
GitHub
commit
d549ecced4
@ -5,9 +5,16 @@
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--
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-- This function is just a placement to store and use the pattern for
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-- foreign object names
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-- Servers: cdb_fs_$(server_name)
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-- Schemas: cdb_fs_schema_$(md5sum(server_name || remote_schema_name))
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-- Owner role: cdb_fs_$(md5sum(current_database() || server_name)
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-- Servers: cdb_fs_$(server_name)
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-- View schema: cdb_fs_$(server_name)
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-- > This is where all views created when importing tables are placed
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-- > One server has only one view schema
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-- Import Schemas: cdb_fs_schema_$(md5sum(server_name || remote_schema_name))
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-- > This is where the foreign tables are placed
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-- > One server has one import schema per remote schema plus auxiliar ones used
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-- to access the remote catalog (pg_catalog, information_schema...)
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-- Owner role: cdb_fs_$(md5sum(current_database() || server_name)
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-- > This is the role than owns all schemas and tables related to the server
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--
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CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Name_Pattern()
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RETURNS TEXT
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@ -19,6 +26,7 @@ LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
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--
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-- Produce a valid DB name for servers generated for the Federated Server
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-- If check_existence is true, it'll throw if the server doesn't exists
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-- This name is also used as the schema to store views
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--
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CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Generate_Server_Name(input_name TEXT, check_existence BOOL)
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RETURNS NAME
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@ -230,16 +238,19 @@ BEGIN
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IF NOT EXISTS (SELECT * FROM pg_foreign_server WHERE srvname = server_internal) THEN
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BEGIN
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EXECUTE FORMAT('CREATE SERVER %I FOREIGN DATA WRAPPER postgres_fdw', server_internal);
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-- TODO: Delete this IF before merging to make sure nobody creates a role
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-- that is later used automatically by us granting them all permissions in the foreign server
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-- TODO: This is here to help debugging during development (so failures to destroy objects are allowed)
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-- TODO
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IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = role_name) THEN
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EXECUTE FORMAT('CREATE ROLE %I NOLOGIN', role_name);
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END IF;
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EXECUTE FORMAT('GRANT ALL PRIVILEGES ON DATABASE %I TO %I', current_database(), role_name);
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EXECUTE FORMAT('GRANT ALL ON SCHEMA %I TO %I', '@extschema@', role_name);
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EXECUTE FORMAT('GRANT EXECUTE ON ALL FUNCTIONS in SCHEMA %I TO %I', '@extschema@', role_name);
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-- These grants over `@extschema@` and `@postgisschema@` are necessary for the cases
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-- where the schemas aren't accessible to PUBLIC, which is what happens in a CARTO database
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EXECUTE FORMAT('GRANT USAGE ON SCHEMA %I TO %I', '@extschema@', role_name);
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EXECUTE FORMAT('GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA %I TO %I', '@extschema@', role_name);
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EXECUTE FORMAT('GRANT USAGE ON SCHEMA %I TO %I', '@postgisschema@', role_name);
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EXECUTE FORMAT('GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA %I TO %I', '@postgisschema@', role_name);
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EXECUTE FORMAT('GRANT SELECT ON ALL TABLES IN SCHEMA %I TO %I', '@postgisschema@', role_name);
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EXECUTE FORMAT('GRANT USAGE ON FOREIGN DATA WRAPPER postgres_fdw TO %I', role_name);
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EXECUTE FORMAT('GRANT USAGE ON FOREIGN DATA WRAPPER postgres_fdw TO %I', role_name);
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EXECUTE FORMAT('GRANT USAGE ON FOREIGN SERVER %I TO %I', server_internal, role_name);
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@ -348,6 +359,8 @@ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
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--
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-- Grant access to a server
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-- In the future we might consider adding the server's view schema to the role search_path
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-- to make it easier to access the created views
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--
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CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Grant_Access(server TEXT, db_role NAME)
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RETURNS void
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@ -173,6 +173,8 @@ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
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-- can be used through SQL and Maps API's.
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-- If the table was already exported, it will be dropped and re-imported
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--
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-- The view is placed under the server's view schema (cdb_fs_$(server_name))
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--
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-- E.g:
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-- SELECT cartodb.CDB_SetUp_PG_Federated_Table(
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-- 'amazon', -- mandatory, name of the federated server
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@ -198,7 +200,10 @@ AS $$
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DECLARE
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server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => false);
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local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
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src_table REGCLASS;
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role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
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src_table REGCLASS; -- import_schema.remote_table - import_schema is local_schema
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local_view text; -- view_schema.local_name - view_schema is server_internal
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rest_of_cols TEXT[];
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geom_expression TEXT;
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@ -284,31 +289,28 @@ BEGIN
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webmercator_expression
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];
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-- To create the view we switch to the caller role to make sure we have permissions
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-- to write in the destination schema
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RESET ROLE;
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-- Create view schema if it doesn't exist
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IF NOT EXISTS (SELECT oid FROM pg_namespace WHERE nspname = server_internal) THEN
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EXECUTE 'CREATE SCHEMA ' || quote_ident(server_internal) || ' AUTHORIZATION ' || quote_ident(role_name);
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END IF;
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-- Create a view with homogeneous CDB fields
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BEGIN
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EXECUTE format(
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'CREATE OR REPLACE VIEW %1$I AS
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SELECT %2s
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FROM %3$s t',
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local_name,
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'CREATE OR REPLACE VIEW %1$I.%2$I AS
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SELECT %3s
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FROM %4$s t',
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server_internal, local_name,
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array_to_string(carto_columns_expression || rest_of_cols, ','),
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src_table
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);
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EXCEPTION WHEN OTHERS THEN
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IF EXISTS (SELECT to_regclass(local_name)) THEN
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RAISE EXCEPTION 'Could not import table "%" as "%" already exists: %', remote_table, local_name, SQLERRM;
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IF EXISTS (SELECT to_regclass(format('%1$I.%2$I', server_internal, local_name))) THEN
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RAISE EXCEPTION 'Could not import table "%" as "%.%" already exists', remote_table, server_internal, local_name;
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ELSE
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RAISE EXCEPTION 'Could not import table "%" as "%": %', remote_table, local_name, SQLERRM;
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END IF;
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END;
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EXECUTE format('ALTER VIEW %1$I OWNER TO %I',
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local_name,
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cartodb.__CDB_FS_Generate_Server_Role_Name(server_internal));
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END
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$$
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LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
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@ -71,7 +71,8 @@ SELECT 'R1', cartodb.CDB_Federated_Table_Register(
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geom_column => 'geom'
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);
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SELECT 'S1', cartodb_id, ST_AsText(the_geom), another_field FROM remote_geom;
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SELECT 'S1', cartodb_id, ST_AsText(the_geom), another_field FROM cdb_fs_loopback.remote_geom;
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Select * FROM CDB_Federated_Server_List_Remote_Tables(
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server => 'loopback',
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remote_schema => 'remote_schema'
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@ -88,7 +89,7 @@ SELECT 'R2', cartodb.CDB_Federated_Table_Register(
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local_name => 'myFullTable'
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);
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SELECT 'S2', cartodb_id, ST_AsText(the_geom), another_field FROM "myFullTable";
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SELECT 'S2', cartodb_id, ST_AsText(the_geom), another_field FROM cdb_fs_loopback."myFullTable";
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Select * FROM CDB_Federated_Server_List_Remote_Tables(
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server => 'loopback',
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remote_schema => 'remote_schema'
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@ -107,9 +108,9 @@ SELECT 'R3', cartodb.CDB_Federated_Table_Register(
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);
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-- The old view should dissapear
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SELECT 'S3_old', cartodb_id, another_field FROM "myFullTable";
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SELECT 'S3_old', cartodb_id, another_field FROM cdb_fs_loopback."myFullTable";
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-- And the new appear
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SELECT 'S3_new', cartodb_id, another_field FROM different_name;
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SELECT 'S3_new', cartodb_id, another_field FROM cdb_fs_loopback.different_name;
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\echo '## Unregistering works'
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-- Deregistering the first table
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@ -255,7 +256,7 @@ SELECT cartodb.CDB_Federated_Table_Unregister(
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-- ===================================================================
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\echo '## Target conflict is handled nicely: Table'
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CREATE TABLE localtable (a integer);
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CREATE TABLE cdb_fs_loopback.localtable (a integer);
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SELECT cartodb.CDB_Federated_Table_Register(
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server => 'loopback',
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remote_schema => 'remote_schema',
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@ -265,7 +266,7 @@ SELECT cartodb.CDB_Federated_Table_Register(
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local_name => 'localtable');
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\echo '## Target conflict is handled nicely: View'
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CREATE VIEW localtable2 AS Select * from localtable;
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CREATE VIEW cdb_fs_loopback.localtable2 AS Select * from cdb_fs_loopback.localtable;
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SELECT cartodb.CDB_Federated_Table_Register(
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server => 'loopback',
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remote_schema => 'remote_schema',
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@ -274,8 +275,8 @@ SELECT cartodb.CDB_Federated_Table_Register(
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geom_column => 'geom',
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local_name => 'localtable2');
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DROP VIEW localtable2;
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DROP TABLE localtable;
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DROP VIEW cdb_fs_loopback.localtable2;
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DROP TABLE cdb_fs_loopback.localtable;
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-- ===================================================================
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-- Test permissions
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@ -292,6 +293,9 @@ SELECT cartodb.CDB_Federated_Table_Register(
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geom_column => 'geom',
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local_name => 'localtable');
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\echo '## Normal users can not write in the import schema'
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CREATE TABLE cdb_fs_loopback.localtable (a integer);
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\echo '## Listing remote tables does not work without permissions'
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Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
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@ -311,7 +315,7 @@ SELECT cartodb.CDB_Federated_Table_Register(
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Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
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\echo '## Selecting from a registered table with granted permissions works'
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Select cartodb_id, ST_AsText(the_geom) from localtable;
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Select cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable;
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\echo '## Selecting from a registered table without permissions does not work'
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\c contrib_regression cdb_fs_tester2
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@ -329,7 +333,7 @@ EXCEPTION
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RETURN FALSE;
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END
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$$ LANGUAGE 'plpgsql';
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Select catch_permission_error($$SELECT cartodb_id, ST_AsText(the_geom) from localtable$$);
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Select catch_permission_error($$SELECT cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable$$);
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DROP FUNCTION catch_permission_error(text);
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\echo '## Deleting a registered table without permissions does not work'
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@ -347,7 +351,7 @@ SELECT cartodb.CDB_Federated_Server_Grant_Access(server := 'loopback', db_role :
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SELECT cartodb.CDB_Federated_Server_Grant_Access(server := 'loopback', db_role := 'cdb_fs_tester2'::name);
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\c contrib_regression cdb_fs_tester2
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Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
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Select cartodb_id, ST_AsText(the_geom) from localtable;
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Select cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable;
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\echo '## A different user can unregister a table'
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SELECT cartodb.CDB_Federated_Table_Unregister(
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@ -3,24 +3,24 @@ C1|
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R1|
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S1|1|POINT(1 1)|patata
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S1|2|POINT(2 2)|patata2
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t|remote_geom|public.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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f|remote_geom2|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
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## Registering another existing table works
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R2|
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S2|3|POINT(3 3)|patata
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t|remote_geom|public.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|public."myFullTable"|id|geom|geom_mercator|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|cdb_fs_loopback."myFullTable"|id|geom|geom_mercator|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
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## Re-registering a table works
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R3|
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ERROR: relation "myFullTable" does not exist at character 49
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ERROR: relation "cdb_fs_loopback.myFullTable" does not exist at character 49
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S3_new|3|patata
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## Unregistering works
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U1|
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ERROR: relation "remote_geom" does not exist at character 71
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f|remote_geom|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|public.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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t|remote_geom2|cdb_fs_loopback.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
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## Registering a table: Invalid server fails
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ERROR: Server "Does not exist" does not exist
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@ -50,15 +50,17 @@ ERROR: non geometry column "Does not exists"
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## Target conflict is handled nicely: Table
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CREATE TABLE
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ERROR: Could not import table "remote_geom" as "localtable" already exists: "localtable" is not a view
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ERROR: Could not import table "remote_geom" as "cdb_fs_loopback.localtable" already exists
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## Target conflict is handled nicely: View
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CREATE VIEW
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ERROR: Could not import table "remote_geom" as "localtable2" already exists: cannot change name of view column "a" to "cartodb_id"
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ERROR: Could not import table "remote_geom" as "cdb_fs_loopback.localtable2" already exists
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DROP VIEW
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DROP TABLE
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## Registering tables does not work without permissions
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You are now connected to database "contrib_regression" as user "cdb_fs_tester".
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ERROR: Not enough permissions to access the server "loopback"
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## Normal users can not write in the import schema
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ERROR: permission denied for schema cdb_fs_loopback at character 14
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## Listing remote tables does not work without permissions
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ERROR: Not enough permissions to access the server "loopback"
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## Registering tables works with granted permissions
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@ -67,8 +69,8 @@ You are now connected to database "contrib_regression" as user "postgres".
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You are now connected to database "contrib_regression" as user "cdb_fs_tester".
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## Listing remote tables works with granted permissions
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t|remote_geom|public.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|public.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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t|remote_geom|cdb_fs_loopback.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|cdb_fs_loopback.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
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## Selecting from a registered table with granted permissions works
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1|POINT(1 1)
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@ -86,16 +88,16 @@ ERROR: You do not have rights to grant access on "loopback"
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You are now connected to database "contrib_regression" as user "postgres".
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You are now connected to database "contrib_regression" as user "cdb_fs_tester2".
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t|remote_geom|public.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|public.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
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t|remote_geom|cdb_fs_loopback.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
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t|remote_geom2|cdb_fs_loopback.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
|
||||
f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
|
||||
1|POINT(1 1)
|
||||
2|POINT(2 2)
|
||||
## A different user can unregister a table
|
||||
NOTICE: drop cascades to view localtable
|
||||
NOTICE: drop cascades to view cdb_fs_loopback.localtable
|
||||
|
||||
f|remote_geom|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
|
||||
t|remote_geom2|public.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
|
||||
t|remote_geom2|cdb_fs_loopback.different_name|id|geom_mercator|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
|
||||
f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
|
||||
## Only the owner can revoke permissions over the server
|
||||
ERROR: You do not have rights to revoke access on "loopback"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user