Merge 10.7 into 10.8

Author: dr-m

mysql-test/main/opt_trace,ps.rdiff

@@ -1,6 +1,5 @@
 --source include/not_embedded.inc
 --source include/have_sequence.inc
---source include/protocol.inc
 SELECT table_name, column_name FROM information_schema.columns where table_name="OPTIMIZER_TRACE";
 set optimizer_trace="enabled=on";
 show variables like 'optimizer_trace';

mysql-test/main/opt_trace.test

@@ -717,6 +717,15 @@ int check_and_do_in_subquery_rewrites(JOIN *join)
         if (arena)
           thd->restore_active_arena(arena, &backup);
         in_subs->is_registered_semijoin= TRUE;
+      }
+
+      /*
+        Print the transformation into trace. Do it when we've just set
+        is_registered_semijoin=TRUE above, and also do it when we've already
+        had it set.
+      */
+      if (in_subs->is_registered_semijoin)
+      {
         OPT_TRACE_TRANSFORM(thd, trace_wrapper, trace_transform,
                             select_lex->select_number,
                             "IN (SELECT)", "semijoin");

sql/opt_subselect.cc

@@ -2544,7 +2544,8 @@ fil_ibd_load(uint32_t space_id, const char *filename, fil_space_t *&space)
 
 	/* Read and validate the first page of the tablespace.
 	Assign a tablespace name based on the tablespace type. */
-	switch (file.validate_for_recovery()) {
+	switch (file.validate_for_recovery(
+			static_cast<uint32_t>(space_id))) {
 		os_offset_t	minimum_size;
 	case DB_SUCCESS:
 		deferred_space = file.m_defer;

storage/innobase/fil/fil0fil.cc

@@ -386,10 +386,11 @@ exist and be successfully opened. We initially open it in read-only mode
 because we just want to read the SpaceID.  However, if the first page is
 corrupt and needs to be restored from the doublewrite buffer, we will
 reopen it in write mode and ry to restore that page.
+@param	space_id	space id to validate for recovery
 @retval DB_SUCCESS if tablespace is valid, DB_ERROR if not.
 m_is_valid is also set true on success, else false. */
 dberr_t
-Datafile::validate_for_recovery()
+Datafile::validate_for_recovery(uint32_t space_id)
 {
 	dberr_t err;
 
@@ -432,15 +433,23 @@ Datafile::validate_for_recovery()
 			}
 		}
 
-		if (m_space_id == UINT32_MAX) {
-			return DB_SUCCESS; /* empty file */
+		const bool empty_tablespace = (m_space_id == UINT32_MAX);
+		if (empty_tablespace && space_id) {
+			/* Set space id to find out whether
+			the page exist in double write buffer */
+			m_space_id = space_id;
 		}
 
 		if (restore_from_doublewrite()) {
-			if (m_defer) {
+			if (!m_defer) {
+				return DB_CORRUPTION;
+			}
+			if (!empty_tablespace) {
 				return err;
 			}
-			return(DB_CORRUPTION);
+			/* InnoDB may rebuild the file from redo log */
+			m_space_id = UINT32_MAX;
+			return DB_SUCCESS; /* empty file */
 		}
 
 		/* Free the previously read first page and then re-validate. */
@@ -768,10 +777,13 @@ Datafile::restore_from_doublewrite()
 		in the doublewrite buffer, then the recovery is going to fail
 		now. Hence this is treated as an error. */
 
-		ib::error()
-			<< "Corrupted page " << page_id
-			<< " of datafile '" << m_filepath
-			<< "' could not be found in the doublewrite buffer.";
+		if (!m_defer) {
+			ib::error()
+				<< "Corrupted page " << page_id
+				<< " of datafile '" << m_filepath
+				<< "' could not be found in the "
+				<< "doublewrite buffer.";
+		}
 
 		return(true);
 	}

storage/innobase/fsp/fsp0file.cc

@@ -207,9 +207,10 @@ class Datafile {
 	However, if the first page is corrupt and needs to be restored
 	from the doublewrite buffer, we will reopen it in write mode and
 	ry to restore that page.
+	@param	space_id	space id to validate for recovery
 	@retval DB_SUCCESS if tablespace is valid, DB_ERROR if not.
 	m_is_valid is also set true on success, else false. */
-	dberr_t validate_for_recovery()
+	dberr_t validate_for_recovery(uint32_t space_id=0)
 		MY_ATTRIBUTE((warn_unused_result));
 
 	/** Checks the consistency of the first page of a datafile when the