#coding:utf-8 # # id: bugs.core_5921 # title: Provide information about Global Commit Number, Commit Number of currently used database snapshot (if any) and Commit Numbers assigned to the committed transactions # decription: # From doc\\sql.extensions\\README.builtin_functions.txt about rdb$get_transaction_cn() function: # === # ... numbers returned by RDB$GET_TRANSACTION_CN could have values below: # -2 - transaction is dead (rolled back) # -1 - transaction is in limbo # 0 - transaction is active, # 1 - transaction committed before database started or less than OIT # >1 - transaction committed after database started # NULL - given transaction number is NULL or greater than database Next Transaction # === # Checked on: 4.0.0.1218, 2.578 s. # ::: NB ::: # This ISQL-based test does NOT verify cases when tx is dead or in limbo. # Perhaps, Python-based implementation is required and will be created later. # # 05.03.2019: renamed RDB$GET_CONTEXT('SYSTEM', 'SNAPSHOT_CN') to RDB$GET_CONTEXT('SYSTEM', 'SNAPSHOT_NUMBER') -- see CORE-6016. Checked on 4.0.0.1455 # # 09.11.2019: added section with substitutions because GET_OIT_CN can differ in SS vs CS: 9 and 10. # Checked on: # 4.0.0.1646 SS: 1.249s. # 4.0.0.1637 SC: 1.532s. # 4.0.0.1633 CS: 1.576s. # # tracker_id: CORE-5921 # min_versions: ['4.0'] # versions: 4.0 # qmid: None import pytest from firebird.qa import db_factory, isql_act, Action # version: 4.0 # resources: None substitutions_1 = [('[ \t]+', ' '), ('GET_OIT_CN[ \t]+[\\d]+', 'GET_OIT_CN ')] init_script_1 = """""" db_1 = db_factory(sql_dialect=3, init=init_script_1) test_script_1 = """ set list on; set term ^; create or alter procedure sp_set_tx_ctx( a_ctx_var_name varchar(80) ) as begin rdb$set_context('USER_SESSION', :a_ctx_var_name, current_transaction); end ^ set term ;^ commit; set list on; execute procedure sp_set_tx_ctx('tx_a'); select iif( tx_a < tx_oit, 'For TX < OIT', iif( tx_a = tx_oit, 'For OIT', 'For TX > OIT') ) as msg_a ,rdb$get_transaction_cn( tx_a ) as get_tx_a_cn from ( select d.mon$oldest_transaction as tx_oit ,cast( rdb$get_context('USER_SESSION','tx_a') as int ) as tx_a from mon$database d ) ; rollback; execute procedure sp_set_tx_ctx('tx_b'); commit; select iif( tx_b < tx_oit, 'For TX < OIT', iif( tx_b = tx_oit, 'For OIT', 'For TX > OIT') ) as msg_b ,rdb$get_transaction_cn( tx_b ) as get_tx_b_cn from ( select d.mon$oldest_transaction as tx_oit ,cast( rdb$get_context('USER_SESSION','tx_b') as int ) as tx_b from mon$database d ) ; select rdb$get_transaction_cn( d.mon$oldest_transaction ) as get_oit_cn ,rdb$get_transaction_cn( current_transaction ) as get_tx_c_cn ,rdb$get_transaction_cn( null ) as get_tx_nul_cn ,rdb$get_transaction_cn( mon$next_transaction + 1 ) as get_tx_nxx_cn -- added 25.09.2018, after commit -- https://github.com/FirebirdSQL/firebird/commit/7610a76ff3f263177d0a9f7b02cdc1784a0f3402 -- all of these columns must contain NULL: ,rdb$get_transaction_cn( mon$next_transaction + (9223372036854775807-mon$next_transaction) ) as get_tx_001_cn ,rdb$get_transaction_cn( 9223372036854775807 ) as get_tx_002_cn ,rdb$get_transaction_cn(-9223372036854775808) as get_tx_003_cn from mon$database d; set term ^; execute block returns( global_cn_sign smallint, snapshot_cn smallint ) as begin global_cn_sign = sign( rdb$get_context('SYSTEM', 'GLOBAL_CN') ); snapshot_cn = sign( rdb$get_context('SYSTEM', 'SNAPSHOT_NUMBER') ); suspend; end ^ set term ;^ commit; """ act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1) expected_stdout_1 = """ MSG_A For TX > OIT GET_TX_A_CN 0 MSG_B For TX < OIT GET_TX_B_CN 1 GET_OIT_CN 9 GET_TX_C_CN 0 GET_TX_NUL_CN GET_TX_NXX_CN GET_TX_001_CN GET_TX_002_CN GET_TX_003_CN GLOBAL_CN_SIGN 1 SNAPSHOT_CN 1 """ @pytest.mark.version('>=4.0') def test_core_5921_1(act_1: Action): act_1.expected_stdout = expected_stdout_1 act_1.execute() assert act_1.clean_expected_stdout == act_1.clean_stdout