Move trx_commit_for_mysql(trx) calls in row0mysql.c before calls to

row_mysql_unlock_data_dictionary(trx), fixing bug #19727.

row/row0mysql.c

@@ -2540,10 +2540,10 @@ do not allow the discard. We also reserve the data dictionary latch. */
 	}
 
 funct_exit:
-	row_mysql_unlock_data_dictionary(trx);
-
 	trx_commit_for_mysql(trx);
 
+	row_mysql_unlock_data_dictionary(trx);
+
 	trx->op_info = "";
 
 	return((int) err);
@@ -2673,10 +2673,10 @@ row_import_tablespace_for_mysql(
 	}
 
 funct_exit:
-	row_mysql_unlock_data_dictionary(trx);
-
 	trx_commit_for_mysql(trx);
 
+	row_mysql_unlock_data_dictionary(trx);
+
 	trx->op_info = "";
 
 	return((int) err);
@@ -3304,6 +3304,8 @@ fputs("  InnoDB: You are trying to drop table ", stderr);
 	}
 funct_exit:
 
+	trx_commit_for_mysql(trx);
+
 	if (locked_dictionary) {
 		row_mysql_unlock_data_dictionary(trx);
 	}
@@ -3312,8 +3314,6 @@ funct_exit:
 		mem_free(dir_path_of_temp_table);
 	}
 
-	trx_commit_for_mysql(trx);
-
 	trx->op_info = "";
 
 #ifndef UNIV_HOTBACKUP
@@ -3392,10 +3392,10 @@ loop:
 		}
 	}
 
-	row_mysql_unlock_data_dictionary(trx);
-
 	trx_commit_for_mysql(trx);
 
+	row_mysql_unlock_data_dictionary(trx);
+
 	trx->op_info = "";
 
 	return(err);
@@ -3788,6 +3788,8 @@ end:
 	}
 
 funct_exit:
+	trx_commit_for_mysql(trx);
+
 	if (!recovering_temp_table) {
 		row_mysql_unlock_data_dictionary(trx);
 	}
@@ -3796,8 +3798,6 @@ funct_exit:
 		mem_heap_free(heap);
 	}
 
-	trx_commit_for_mysql(trx);
-
 	trx->op_info = "";
 
 	return((int) err);