Fix a severe bug that was introduced in r1422 when fixing Bug #21101.

When creating an index containing a too long record, InnoDB would
dereference a NULL pointer when trying to determine the maximum row length.

innodb_check_for_record_too_big_error(): Replace the dict_table_t*
parameter with a Boolean flag.  There is not always a dict_table_t object
when this function is called.

page_get_free_space_of_empty_noninline(): Move the definition and
declaration from row0mysql (!) to page0page.  Make the signature
identical with page_get_free_space_of_empty().

create_clustered_index_when_no_primary(): Add the parameter "comp".
Remove unnecessary casts.

handler/ha_innodb.cc

@@ -4510,17 +4510,17 @@ ha_innobase::position(
 /*********************************************************************
 If it's a DB_TOO_BIG_RECORD error then set a suitable message to
 return to the client.*/
-static
+inline
 void
 innodb_check_for_record_too_big_error(
 /*==================================*/
-	dict_table_t*	table,		/* in: table to check */
-	int		error)		/* in: error code to check */
+	ulint	comp,	/* in: ROW_FORMAT: nonzero=COMPACT, 0=REDUNDANT */
+	int	error)	/* in: error code to check */
 {
 	if (error == (int)DB_TOO_BIG_RECORD) {
 		ulint		max_row_size;
 
-		max_row_size = page_get_free_space_of_empty_noninline(table);
+		max_row_size = page_get_free_space_of_empty_noninline(comp);
 
 		my_error(ER_TOO_BIG_ROWSIZE, MYF(0), max_row_size);
 	}
@@ -4634,9 +4634,8 @@ create_table_def(
 
 	error = row_create_table_for_mysql(table, trx);
 
-	/* We need access to the table and so we do the error checking
-	and set the error message here, before the error translation.*/
-	innodb_check_for_record_too_big_error(table, error);
+	innodb_check_for_record_too_big_error(dict_table_is_comp(table),
+					      error);
 
 	error = convert_error_code_to_mysql(error, NULL);
 
@@ -4760,9 +4759,8 @@ create_index(
 	sure we don't create too long indexes. */
 	error = row_create_index_for_mysql(index, trx, field_lengths);
 
-	/* We need access to the table and so we do the error checking
-	and set the error message here, before the error translation.*/
-	innodb_check_for_record_too_big_error(index->table, error);
+	innodb_check_for_record_too_big_error(form->s->row_type
+					      != ROW_TYPE_REDUNDANT, error);
 
 	error = convert_error_code_to_mysql(error, NULL);
 
@@ -4779,6 +4777,8 @@ int
 create_clustered_index_when_no_primary(
 /*===================================*/
 	trx_t*		trx,		/* in: InnoDB transaction handle */
+	ulint		comp,		/* in: ROW_FORMAT:
+					nonzero=COMPACT, 0=REDUNDANT */
 	const char*	table_name)	/* in: table name */
 {
 	dict_index_t*	index;
@@ -4787,13 +4787,11 @@ create_clustered_index_when_no_primary(
 	/* We pass 0 as the space id, and determine at a lower level the space
 	id where to store the table */
 
-	index = dict_mem_index_create((char*) table_name,
-		(char*) "GEN_CLUST_INDEX", 0, DICT_CLUSTERED, 0);
+	index = dict_mem_index_create(table_name, "GEN_CLUST_INDEX",
+				      0, DICT_CLUSTERED, 0);
 	error = row_create_index_for_mysql(index, trx, NULL);
 
-	/* We need access to the table and so we do the error checking
-	and set the error message here, before the error translation.*/
-	innodb_check_for_record_too_big_error(index->table, error);
+	innodb_check_for_record_too_big_error(comp, error);
 
 	error = convert_error_code_to_mysql(error, NULL);
 
@@ -4924,8 +4922,9 @@ ha_innobase::create(
 		order the rows by their row id which is internally generated
 		by InnoDB */
 
-		error = create_clustered_index_when_no_primary(trx,
-							norm_name);
+		error = create_clustered_index_when_no_primary(
+			trx, form->s->row_type != ROW_TYPE_REDUNDANT,
+			norm_name);
 		if (error) {
 			goto cleanup;
 		}

include/page0page.h

@@ -531,6 +531,15 @@ page_get_free_space_of_empty(
 			/* out: free space */
 	ulint	comp)	/* in: nonzero=compact page format */
 		__attribute__((const));
+/*****************************************************************
+Calculates free space if a page is emptied. */
+
+ulint
+page_get_free_space_of_empty_noninline(
+/*===================================*/
+			/* out: free space */
+	ulint	comp)	/* in: nonzero=compact page format */
+		__attribute__((const));
 /****************************************************************
 Returns the sum of the sizes of the records in the record list
 excluding the infimum and supremum records. */

include/row0mysql.h

@@ -460,19 +460,6 @@ row_check_table_for_mysql(
 					/* out: DB_ERROR or DB_SUCCESS */
 	row_prebuilt_t*	prebuilt);	/* in: prebuilt struct in MySQL
 					handle */
-/*************************************************************************
-Get the min of the maximum possible row sizes. */
-
-ulint
-page_get_free_space_of_empty_noninline(
-/*===================================*/
-					/* out: The (approx) maximum size
-					of a row, this is a conservative
-					estimate, since the size can be
-					slightly larger depending upon
-					the ROW_FORMAT setting.*/
-	dict_table_t*	table);		/* in: table for which max record
-					size required.*/
 
 /* A struct describing a place for an individual column in the MySQL
 row format which is presented to the table handler in ha_innobase.

page/page0page.c

@@ -209,6 +209,18 @@ page_set_max_trx_id(
 	}
 }
 
+/*****************************************************************
+Calculates free space if a page is emptied. */
+
+ulint
+page_get_free_space_of_empty_noninline(
+/*===================================*/
+			/* out: free space */
+	ulint	comp)	/* in: nonzero=compact page format */
+{
+	return(page_get_free_space_of_empty(comp));
+}
+
 /****************************************************************
 Allocates a block of memory from an index page. */
 

row/row0mysql.c

@@ -4059,25 +4059,3 @@ row_check_table_for_mysql(
 
 	return(ret);
 }
-
-/*************************************************************************
-Get the maximum row size. */
-
-ulint
-page_get_free_space_of_empty_noninline(
-/*===================================*/
-					/* out: The (approx) maximum size
-					of a row, this is a conservative
-					estimate, since the size can be
-					slightly larger depending upon
-					the ROW_FORMAT setting.*/
-	dict_table_t*	table)		/* in: table for which max record
-					size is required.*/
-{
-	ibool		compact;
-
-	compact = dict_table_is_comp(table);
-
-	return(page_get_free_space_of_empty(compact) / 2);
-}
-