Merge tnurnberg@bk-internal.mysql.com:/home/bk/mysql-5.1-opt

into  mysql.com:/scratch/tnurnberg/31700/51-31700


sql/sql_select.cc:
  Auto merged

mysql-test/r/log_tables.result

@@ -820,3 +820,31 @@ Execute	select '000 001 002 003 004 005 006 007 008 009010 011 012 013 014 015 0
 Query	set global general_log = off
 deallocate prepare long_query;
 set global general_log = @old_general_log_state;
+SET @old_slow_log_state = @@global.slow_query_log;
+SET SESSION long_query_time = 0;
+SET GLOBAL slow_query_log = ON;
+FLUSH LOGS;
+TRUNCATE TABLE mysql.slow_log;
+CREATE TABLE t1 (f1 SERIAL,f2 INT, f3 INT, PRIMARY KEY(f1), KEY(f2));
+INSERT INTO t1 VALUES (1,1,1);
+INSERT INTO t1 VALUES (2,2,2);
+INSERT INTO t1 VALUES (3,3,3);
+INSERT INTO t1 VALUES (4,4,4);
+SELECT SQL_NO_CACHE 'Bug#31700 - SCAN',f1,f2,f3 FROM t1 WHERE f3=4;
+Bug#31700 - SCAN	f1	f2	f3
+Bug#31700 - SCAN	4	4	4
+SELECT SQL_NO_CACHE 'Bug#31700 - KEY', f1,f2,f3 FROM t1 WHERE f2=3;
+Bug#31700 - KEY	f1	f2	f3
+Bug#31700 - KEY	3	3	3
+SELECT SQL_NO_CACHE 'Bug#31700 - PK',  f1,f2,f3 FROM t1 WHERE f1=2;
+Bug#31700 - PK	f1	f2	f3
+Bug#31700 - PK	2	2	2
+SELECT start_time, rows_examined, rows_sent, sql_text FROM mysql.slow_log WHERE sql_text LIKE '%Bug#31700%' ORDER BY start_time;
+start_time	rows_examined	rows_sent	sql_text
+TIMESTAMP	4	1	SELECT SQL_NO_CACHE 'Bug#31700 - SCAN',f1,f2,f3 FROM t1 WHERE f3=4
+TIMESTAMP	1	1	SELECT SQL_NO_CACHE 'Bug#31700 - KEY', f1,f2,f3 FROM t1 WHERE f2=3
+TIMESTAMP	1	1	SELECT SQL_NO_CACHE 'Bug#31700 - PK',  f1,f2,f3 FROM t1 WHERE f1=2
+DROP TABLE t1;
+TRUNCATE TABLE mysql.slow_log;
+SET GLOBAL slow_query_log = @old_slow_log_state;
+SET SESSION long_query_time =@old_long_query_time;

mysql-test/t/log_tables.test

@@ -924,3 +924,34 @@ set global general_log = off;
 select command_type, argument from mysql.general_log;
 deallocate prepare long_query;
 set global general_log = @old_general_log_state;
+
+#
+# Bug #31700: thd->examined_row_count not incremented for 'const' type queries
+#
+SET @old_slow_log_state = @@global.slow_query_log;
+
+SET SESSION long_query_time = 0;
+SET GLOBAL slow_query_log = ON;
+FLUSH LOGS;
+TRUNCATE TABLE mysql.slow_log;
+
+# Let there be three columns, unique, non-unique, and non-indexed:
+CREATE TABLE t1 (f1 SERIAL,f2 INT, f3 INT, PRIMARY KEY(f1), KEY(f2));
+INSERT INTO t1 VALUES (1,1,1);
+INSERT INTO t1 VALUES (2,2,2);
+INSERT INTO t1 VALUES (3,3,3);
+INSERT INTO t1 VALUES (4,4,4);
+
+SELECT SQL_NO_CACHE 'Bug#31700 - SCAN',f1,f2,f3 FROM t1 WHERE f3=4;
+SELECT SQL_NO_CACHE 'Bug#31700 - KEY', f1,f2,f3 FROM t1 WHERE f2=3;
+SELECT SQL_NO_CACHE 'Bug#31700 - PK',  f1,f2,f3 FROM t1 WHERE f1=2;
+
+--replace_column 1 TIMESTAMP
+SELECT start_time, rows_examined, rows_sent, sql_text FROM mysql.slow_log WHERE sql_text LIKE '%Bug#31700%' ORDER BY start_time;
+
+DROP TABLE t1;
+
+TRUNCATE TABLE mysql.slow_log;
+
+SET GLOBAL slow_query_log = @old_slow_log_state;
+SET SESSION long_query_time =@old_long_query_time;

sql/sql_class.h

@@ -1365,9 +1365,20 @@ class THD :public Statement,
 
   ulonglong  limit_found_rows;
   ulonglong  options;           /* Bitmap of states */
-  longlong   row_count_func;	/* For the ROW_COUNT() function */
-  ha_rows    cuted_fields,
-             sent_row_count, examined_row_count;
+  longlong   row_count_func;    /* For the ROW_COUNT() function */
+  ha_rows    cuted_fields;
+
+  /*
+    number of rows we actually sent to the client, including "synthetic"
+    rows in ROLLUP etc.
+  */
+  ha_rows    sent_row_count;
+
+  /*
+    number of rows we read, sent or not, including in create_sort_index()
+  */
+  ha_rows    examined_row_count;
+
   /*
     The set of those tables whose fields are referenced in all subqueries
     of the query.
@@ -1403,7 +1414,11 @@ class THD :public Statement,
   /* Statement id is thread-wide. This counter is used to generate ids */
   ulong      statement_id_counter;
   ulong	     rand_saved_seed1, rand_saved_seed2;
-  ulong      row_count;  // Row counter, mainly for errors and warnings
+  /*
+    Row counter, mainly for errors and warnings. Not increased in
+    create_sort_index(); may differ from examined_row_count.
+  */
+  ulong      row_count;
   pthread_t  real_id;                           /* For debugging */
   my_thread_id  thread_id;
   uint	     tmp_table, global_read_lock;

sql/sql_select.cc

@@ -10665,6 +10665,15 @@ do_select(JOIN *join,List<Item> *fields,TABLE *table,Procedure *procedure)
       error= (*end_select)(join, 0, 0);
       if (error == NESTED_LOOP_OK || error == NESTED_LOOP_QUERY_LIMIT)
 	error= (*end_select)(join, 0, 1);
+
+      /*
+        If we don't go through evaluate_join_record(), do the counting
+        here.  join->send_records is increased on success in end_send(),
+        so we don't touch it here.
+      */
+      join->examined_rows++;
+      join->thd->row_count++;
+      DBUG_ASSERT(join->examined_rows <= 1);
     }
     else if (join->send_row_on_empty_set())
     {