MDEV-6160: InnoDB: Failing assertion: page_is_comp(next_page) == page_is_comp(page)

This is not yet a fix. This is change to print additional information at the point
when this assertion is going to happen. Print as much information about the pages
and index to find out why next page is not a compact format.

storage/innobase/btr/btr0pcur.c

@@ -425,9 +425,24 @@ btr_pcur_move_to_next_page(
 				   btr_pcur_get_btr_cur(cursor)->index, mtr);
 	next_page = buf_block_get_frame(next_block);
 #ifdef UNIV_BTR_DEBUG
-	ut_a(page_is_comp(next_page) == page_is_comp(page));
-	ut_a(btr_page_get_prev(next_page, mtr)
-	     == buf_block_get_page_no(btr_pcur_get_block(cursor)));
+
+	if (page_is_comp(next_page) != page_is_comp(page)) {
+		btr_pages_info(page, next_page, space,
+			zip_size, next_page_no, cursor->latch_mode,
+			btr_pcur_get_btr_cur(cursor)->index,
+			btr_page_get_next(page, mtr),
+			btr_page_get_prev(page, mtr),
+			buf_block_get_space(next_block),
+			buf_block_get_zip_size(next_block),
+			btr_page_get_next(next_page, mtr),
+			btr_page_get_prev(next_page, mtr),
+		        mtr, __FILE__, __LINE__);
+
+
+		ut_a(page_is_comp(next_page) == page_is_comp(page));
+		ut_a(btr_page_get_prev(next_page, mtr)
+			== buf_block_get_page_no(btr_pcur_get_block(cursor)));
+	}
 #endif /* UNIV_BTR_DEBUG */
 	next_block->check_index_page_at_flush = TRUE;
 

storage/innobase/fil/fil0fil.c

@@ -457,6 +457,21 @@ fil_space_get_by_id(
 	return(space);
 }
 
+/*******************************************************************//**
+Returns the table space name for a given id, NULL if not found. */
+const char*
+fil_space_get_name(
+/*================*/
+	ulint	id)	/*!< in: space id */
+{
+	fil_space_t*    space;
+
+	mutex_enter(&fil_system->mutex);
+	space = fil_space_get_by_id(id);
+	mutex_exit(&fil_system->mutex);
+
+	return (space == NULL ? NULL : space->name);
+}
 /*******************************************************************//**
 Returns the table space by a given name, NULL if not found. */
 UNIV_INLINE

storage/innobase/include/btr0cur.h

@@ -825,6 +825,28 @@ extern ulint	btr_cur_n_sea_old;
 extern uint	btr_cur_limit_optimistic_insert_debug;
 #endif /* UNIV_DEBUG */
 
+/*******************************************************************//**
+Print information about old page and a new page on a B-tree when
+we note that page types do not match.*/
+void
+btr_pages_info(
+	page_t* old_page,	/*!< in: Page where we were */
+	page_t* new_page,	/*!< in: Page where we travelsed */
+	ulint	space_id,	/*!< in: space id */
+	ulint	zip_size,	/*!< in: zip size */
+	ulint	page_no,	/*!< in: Page id where travelsed */
+	ulint	latch_mode,	/*!< in: Used latch mode */
+	dict_index_t* index,	/*!< in: Used index */
+	ulint	old_next_page_no, /*!< in: Next page number from old page */
+	ulint	old_prev_page_no, /*!< in: Prev page number from old page */
+	ulint	new_space_id,	  /*!< in: Space id of new page */
+	ulint	new_zip_size,	  /*!< in: Zip size of new page */
+	ulint	new_next_page_no, /*!< in: Next page number from new page */
+	ulint	new_prev_page_no, /*!< in: Prev page number from new page */
+	mtr_t*  mtr,		/*!< in: mini transaction */
+	const char*  file,	/*!< in: file name where called */
+	ulint	line);		/*!< in: line number where called */
+
 #ifndef UNIV_NONINL
 #include "btr0cur.ic"
 #endif

storage/innobase/include/fil0fil.h

@@ -752,6 +752,14 @@ fil_mtr_rename_log(
 	const char*	tmp_name);	/*!< in: temp table name used while
 					swapping */
 
+
 typedef	struct fil_space_struct	fil_space_t;
 
+/*******************************************************************//**
+Returns the table space name for a given id, NULL if not found. */
+const char*
+fil_space_get_name(
+/*================*/
+	ulint	id);	/*!< in: space id */
+
 #endif

storage/xtradb/btr/btr0pcur.c

@@ -440,9 +440,24 @@ btr_pcur_move_to_next_page(
 	});
 
 #ifdef UNIV_BTR_DEBUG
-	ut_a(page_is_comp(next_page) == page_is_comp(page));
-	ut_a(btr_page_get_prev(next_page, mtr)
-	     == buf_block_get_page_no(btr_pcur_get_block(cursor)));
+
+	if (page_is_comp(next_page) != page_is_comp(page)) {
+		btr_pages_info(page, next_page, space,
+			zip_size, next_page_no, cursor->latch_mode,
+			btr_pcur_get_btr_cur(cursor)->index,
+			btr_page_get_next(page, mtr),
+			btr_page_get_prev(page, mtr),
+			buf_block_get_space(next_block),
+			buf_block_get_zip_size(next_block),
+			btr_page_get_next(next_page, mtr),
+			btr_page_get_prev(next_page, mtr),
+		        mtr, __FILE__, __LINE__);
+
+
+		ut_a(page_is_comp(next_page) == page_is_comp(page));
+		ut_a(btr_page_get_prev(next_page, mtr)
+			== buf_block_get_page_no(btr_pcur_get_block(cursor)));
+	}
 #endif /* UNIV_BTR_DEBUG */
 	next_block->check_index_page_at_flush = TRUE;
 

storage/xtradb/fil/fil0fil.c

@@ -467,6 +467,21 @@ fil_space_get_by_id(
 	return(space);
 }
 
+/*******************************************************************//**
+Returns the table space name for a given id, NULL if not found. */
+const char*
+fil_space_get_name(
+/*================*/
+	ulint	id)	/*!< in: space id */
+{
+	fil_space_t*    space;
+
+	mutex_enter(&fil_system->mutex);
+	space = fil_space_get_by_id(id);
+	mutex_exit(&fil_system->mutex);
+
+	return (space == NULL ? NULL : space->name);
+}
 /*******************************************************************//**
 Returns the table space by a given name, NULL if not found. */
 UNIV_INLINE

storage/xtradb/include/btr0cur.h

@@ -826,6 +826,28 @@ extern ulint	btr_cur_n_sea_old;
 extern uint	btr_cur_limit_optimistic_insert_debug;
 #endif /* UNIV_DEBUG */
 
+/*******************************************************************//**
+Print information about old page and a new page on a B-tree when
+we note that page types do not match.*/
+void
+btr_pages_info(
+	page_t* old_page,	/*!< in: Page where we were */
+	page_t* new_page,	/*!< in: Page where we travelsed */
+	ulint	space_id,	/*!< in: space id */
+	ulint	zip_size,	/*!< in: zip size */
+	ulint	page_no,	/*!< in: Page id where travelsed */
+	ulint	latch_mode,	/*!< in: Used latch mode */
+	dict_index_t* index,	/*!< in: Used index */
+	ulint	old_next_page_no, /*!< in: Next page number from old page */
+	ulint	old_prev_page_no, /*!< in: Prev page number from old page */
+	ulint	new_space_id,	  /*!< in: Space id of new page */
+	ulint	new_zip_size,	  /*!< in: Zip size of new page */
+	ulint	new_next_page_no, /*!< in: Next page number from new page */
+	ulint	new_prev_page_no, /*!< in: Prev page number from new page */
+	mtr_t*  mtr,		/*!< in: mini transaction */
+	const char*  file,	/*!< in: file name where called */
+	ulint	line);		/*!< in: line number where called */
+
 #ifndef UNIV_NONINL
 #include "btr0cur.ic"
 #endif

storage/xtradb/include/fil0fil.h

@@ -794,6 +794,14 @@ fil_mtr_rename_log(
 	const char*	tmp_name);	/*!< in: temp table name used while
 					swapping */
 
+
 typedef	struct fil_space_struct	fil_space_t;
 
+/*******************************************************************//**
+Returns the table space name for a given id, NULL if not found. */
+const char*
+fil_space_get_name(
+/*================*/
+	ulint	id);	/*!< in: space id */
+
 #endif