MDEV-19968: Galera test failure on galera_load_data

Add wait conditions and compare cardinality etc information
between nodes and print something only if they differ.

mysql-test/suite/galera/r/galera_load_data.result

@@ -32,49 +32,15 @@ Warnings:
 Note	1031	Storage engine InnoDB of the table `cardtest02`.`cardtest_tbl` doesn't have this option
 UNLOCK TABLES;
 use cardtest02;
-show indexes from cardtest_tbl;
-Table	cardtest_tbl
-Non_unique	0
-Key_name	PRIMARY
-Seq_in_index	1
-Column_name	id
-Collation	A
-Cardinality	301
-Sub_part	NULL
-Packed	NULL
-Null	
-Index_type	BTREE
-Comment	
-Index_comment	
-select table_rows, avg_row_length, data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
-table_rows	301
-avg_row_length	81
-data_length	24576
 select count(*) from cardtest_tbl;
-count(*)	301
+count(*)
+301
 connection node_2;
 set session wsrep_sync_wait=15;
 use cardtest02;
-show indexes from cardtest_tbl;
-Table	cardtest_tbl
-Non_unique	0
-Key_name	PRIMARY
-Seq_in_index	1
-Column_name	id
-Collation	A
-Cardinality	301
-Sub_part	NULL
-Packed	NULL
-Null	
-Index_type	BTREE
-Comment	
-Index_comment	
-select table_rows, avg_row_length, data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
-table_rows	301
-avg_row_length	81
-data_length	24576
 select count(*) from cardtest_tbl;
-count(*)	301
+count(*)
+301
 connection node_1;
 use test;
 drop database cardtest02;

mysql-test/suite/galera/t/galera_load_data.test

 --source include/galera_cluster.inc
 
-
 --connection node_1
 
 create database cardtest02;
@@ -38,23 +37,44 @@ ALTER TABLE `cardtest_tbl` ENABLE KEYS;
 UNLOCK TABLES;
 
 use cardtest02;
---sleep 15
---vertical_results
-show indexes from cardtest_tbl;
---vertical_results
-select table_rows, avg_row_length, data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+--let $wait_timeout=600
+--let $wait_condition = SELECT table_rows = 301 from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+--source include/wait_condition.inc
+
 select count(*) from cardtest_tbl;
 
+let $cardinality1 = `SELECT cardinality from information_schema.statistics WHERE TABLE_NAME = 'cardtest_tbl'`;
+let $table_rows1 = `SELECT table_rows from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`;
+let $avg_row_length1 = `SELECT avg_row_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`;
+let $data_length1 = `SELECT data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`;
+
 --connection node_2
 set session wsrep_sync_wait=15;
 use cardtest02;
---sleep 15
---vertical_results
-show indexes from cardtest_tbl;
---vertical_results
-select table_rows, avg_row_length, data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+
+--let $wait_timeout=600
+--let $wait_condition = SELECT table_rows = 301 from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+--source include/wait_condition.inc
+
 select count(*) from cardtest_tbl;
 
+if (`SELECT cardinality <> $cardinality1 from information_schema.statistics WHERE TABLE_NAME = 'cardtest_tbl'`)
+{
+SELECT cardinality from information_schema.statistics WHERE TABLE_NAME = 'cardtest_tbl';
+}
+if (`SELECT table_rows <> $table_rows1 from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`)
+{
+SELECT table_rows from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+}
+if (`SELECT avg_row_length <> $avg_row_length1 from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`)
+{
+SELECT avg_row_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+}
+if (`SELECT data_length <> $data_length1 from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl'`)
+{
+SELECT data_length from information_schema.tables WHERE TABLE_NAME = 'cardtest_tbl';
+}
+
 --connection node_1
 use test;
 drop database cardtest02;