fn_ps_thread_trx_info.test

-- source include/not_embedded.inc
# Tests for sys schema
# Verify the sys.ps_thread_trx_info() function perfoms as expected

# Passing unknown connection id should return NULL
SELECT sys.ps_thread_trx_info(234623462376);

# Make sure current thread returns a valid JSON object
SELECT JSON_VALID(sys.ps_thread_trx_info(sys.ps_thread_id(NULL)));

# Dummy up some transactions and inspect
CREATE DATABASE trx;
CREATE TABLE trx.info (id INT PRIMARY KEY, info VARCHAR(20));

--connect(con1,localhost,root,,)
connection con1;
let $NEW_TRX_ID=`SELECT thread_id FROM performance_schema.threads
  WHERE PROCESSLIST_ID = connection_id()`;

USE trx;
START TRANSACTION;
INSERT INTO info VALUES (1, 'foo');
COMMIT;
START TRANSACTION;
INSERT INTO info VALUES (2, 'bar');
COMMIT;

connection default;
--disable_query_log ONCE
eval SET @ps_thread_id = $NEW_TRX_ID;

# Get the JSON dump of the transaction info
SET @json_doc := sys.ps_thread_trx_info(@ps_thread_id);

# JSON should be valid
SELECT JSON_VALID(@json_doc);

# Should have two transactions in the array
SELECT JSON_LENGTH(@json_doc);

# Expected keys are returned for first transaction details
SELECT JSON_KEYS(JSON_EXTRACT(@json_doc, '$[0]'));

# Expected values are returned for the transaction details
SELECT JSON_CONTAINS_PATH(@json_doc, 'one',          '$[0].time');
SELECT JSON_CONTAINS(@json_doc, '"COMMITTED"',       '$[0].state');
SELECT JSON_CONTAINS(@json_doc, '"READ WRITE"',      '$[0].mode');
SELECT JSON_CONTAINS(@json_doc, '"NO"',              '$[0].autocommitted');
SELECT JSON_CONTAINS(@json_doc, '"AUTOMATIC"',       '$[0].gtid');
SELECT JSON_CONTAINS(@json_doc, '"REPEATABLE READ"', '$[0].isolation');

# Expected keys are returned for first transaction statements_executed details
SELECT JSON_KEYS(JSON_EXTRACT(@json_doc, '$[0].statements_executed[0]'));

# Confirm statement details values
SELECT JSON_CONTAINS_PATH(@json_doc, 'one',                               '$[0].statements_executed[0].time');
SELECT JSON_CONTAINS(@json_doc, '"INSERT INTO info VALUES (1, \'foo\')"', '$[0].statements_executed[0].sql_text');
SELECT JSON_CONTAINS(@json_doc, '"trx"',                                  '$[0].statements_executed[0].schema');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].rows_examined');
SELECT JSON_CONTAINS(@json_doc, '1',                                      '$[0].statements_executed[0].rows_affected');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].rows_sent');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].tmp_tables');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].tmp_disk_tables');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].sort_rows');
SELECT JSON_CONTAINS(@json_doc, '0',                                      '$[0].statements_executed[0].sort_merge_passes');

# Second statement in transaction should be a COMMIT
SELECT JSON_CONTAINS(@json_doc, '"COMMIT"', '$[0].statements_executed[1].sql_text');

# Simulate a truncated set of output by lowering the @sys.ps_thread_trx_info.max_length user variable
# This also tests the user variable works appropriately, incidentally

SET @sys.ps_thread_trx_info.max_length = 100;

# Should return an error JSON object
SELECT sys.ps_thread_trx_info(@ps_thread_id);

# Setting the user variable back to NULL should reset to 65535 from sys_config, and no truncation
SET @sys.ps_thread_trx_info.max_length = NULL;
SELECT JSON_VALID(sys.ps_thread_trx_info(@ps_thread_id));

# Clean up

disconnect con1;
DROP DATABASE trx;