MDEV-24813 [to-squash] Add invocation of init_table_full_scan_if_needed in join_read_first and join_read_last

Missed these places of full index scans in the previous commit

Author: mariadb-YuchenPei

mysql-test/main/innodb_full_scan.result

@@ -194,6 +194,25 @@ SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_
 COUNT
 16
 drop table t1, t2;
+# Full index scan
+create table t10 (a int, b varchar(100), index(a)) engine=innodb;
+insert into t10 select seq, uuid() from seq_1_to_10000;
+create table t11(a int) engine=innodb;
+insert into t11 select a from t10;
+## +0, was +11
+SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_created';
+COUNT
+16
+drop table t10, t11;
+create table t10 (a int, b varchar(100), index(a)) engine=innodb;
+insert into t10 select seq, uuid() from seq_1_to_10000;
+create table t11(a int) engine=innodb;
+insert into t11 select a from t10 order by a desc;
+## +0, was +11
+SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_created';
+COUNT
+16
+drop table t10, t11;
 set global innodb_monitor_enable=default;
 Warnings:
 Warning	1230	Default value is not defined for this set option. Please specify correct counter or module name.

mysql-test/main/innodb_full_scan.test

@@ -172,4 +172,31 @@ SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_
 
 drop table t1, t2;
 
+--echo # Full index scan
+create table t10 (a int, b varchar(100), index(a)) engine=innodb;
+insert into t10 select seq, uuid() from seq_1_to_10000;
+create table t11(a int) engine=innodb;
+insert into t11 select a from t10;
+--echo ## +0, was +11
+SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_created';
+drop table t10, t11;
+
+create table t10 (a int, b varchar(100), index(a)) engine=innodb;
+insert into t10 select seq, uuid() from seq_1_to_10000;
+create table t11(a int) engine=innodb;
+insert into t11 select a from t10 order by a desc;
+--echo ## +0, was +11
+SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_created';
+drop table t10, t11;
+
+create table t10 (a int, b varchar(100), index(a)) engine=innodb;
+insert into t10 select seq, uuid() from seq_1_to_10000;
+create table t11(a int) engine=innodb;
+explain
+insert into t11 select a from t10 where a > 30;
+insert into t11 select a from t10 where a > 30;
+--echo ## +0, was +11
+SELECT COUNT FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE NAME = 'lock_rec_lock_created';
+drop table t10, t11;
+
 set global innodb_monitor_enable=default;

sql/sql_select.cc

@@ -25464,6 +25464,9 @@ join_read_first(JOIN_TAB *tab)
   tab->table->status=0;
   tab->read_record.read_record_func= join_read_next;
   tab->read_record.table=table;
+  init_table_full_scan_if_needed(tab->table,
+                                 tab->select ? tab->select->cond : NULL,
+                                 tab->join->unit->lim.get_select_limit());
   if (!table->file->inited)
     error= table->file->ha_index_init(tab->index, tab->sorted);
   if (likely(!error))
@@ -25503,6 +25506,9 @@ join_read_last(JOIN_TAB *tab)
   tab->table->status=0;
   tab->read_record.read_record_func= join_read_prev;
   tab->read_record.table=table;
+  init_table_full_scan_if_needed(tab->table,
+                                 tab->select ? tab->select->cond : NULL,
+                                 tab->join->unit->lim.get_select_limit());
   if (!table->file->inited)
     error= table->file->ha_index_init(tab->index, 1);
   if (likely(!error))