Bug #22990029 GCOLS: INCORRECT BEHAVIOR AFTER DATA INSERTED WITH IGNORE KEYWORD

PROBLEM
-------

1. We are inserting a base column entry which causes an invalid value
   by the function provided to generate virtual column,but we go ahead
   and insert this due to ignore keyword.
2. We then delete this record, making this record delete marked in innodb.
   If we try to insert another record with the same pk as the deleted
   record and if the rec is not purged ,then we try to undelete mark this
   record and try to build a update vector with previous and updated value
   and while calculating the value of virtual column we get error from
   server that we cannot calculate this from base column.
   Innodb assumes that innobase_get_computed_value() Should always return
   a valid value for the base column present in the row. The failure of
   this call was not handled ,so we were crashing.

FIX

Author: Aditya A

storage/innobase/include/row0upd.h

@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 1996, 2018, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2018, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
@@ -219,6 +219,7 @@ the equal ordering fields. NOTE: we compare the fields as binary strings!
 @param[in]	heap		memory heap from which allocated
 @param[in,out]	mysql_table	NULL, or mysql table object when
 				user thread invokes dml
+@param[out]	error		error number in case of failure
 @return own: update vector of differing fields, excluding roll ptr and
 trx id */
 upd_t*
@@ -230,8 +231,9 @@ row_upd_build_difference_binary(
 	bool		no_sys,
 	trx_t*		trx,
 	mem_heap_t*	heap,
-	TABLE*		mysql_table)
-	MY_ATTRIBUTE((nonnull(1,2,3,7), warn_unused_result));
+	TABLE*		mysql_table,
+	dberr_t*	error)
+	MY_ATTRIBUTE((nonnull(1,2,3,7,9), warn_unused_result));
 /***********************************************************//**
 Replaces the new column values stored in the update vector to the index entry
 given. */

storage/innobase/row/row0ins.cc

@@ -326,7 +326,7 @@ row_ins_clust_index_entry_by_modify(
 {
 	const rec_t*	rec;
 	upd_t*		update;
-	dberr_t		err;
+	dberr_t		err = DB_SUCCESS;
 	btr_cur_t*	cursor	= btr_pcur_get_btr_cur(pcur);
 	TABLE*		mysql_table = NULL;
 	ut_ad(dict_index_is_clust(cursor->index));
@@ -349,7 +349,11 @@ row_ins_clust_index_entry_by_modify(
 
 	update = row_upd_build_difference_binary(
 		cursor->index, entry, rec, NULL, true,
-		thr_get_trx(thr), heap, mysql_table);
+		thr_get_trx(thr), heap, mysql_table, &err);
+	if (err != DB_SUCCESS) {
+		return(err);
+	}
+
 	if (mode != BTR_MODIFY_TREE) {
 		ut_ad((mode & ~BTR_ALREADY_S_LATCHED) == BTR_MODIFY_LEAF);
 

storage/innobase/row/row0log.cc

@@ -2042,7 +2042,10 @@ row_log_table_apply_update(
 		row, NULL, index, heap, ROW_BUILD_NORMAL);
 	upd_t*		update	= row_upd_build_difference_binary(
 		index, entry, btr_pcur_get_rec(&pcur), cur_offsets,
-		false, NULL, heap, dup->table);
+		false, NULL, heap, dup->table, &error);
+	if (error != DB_SUCCESS) {
+		goto func_exit;
+	}
 
 	if (!update->n_fields) {
 		/* Nothing to do. */

storage/innobase/row/row0upd.cc

@@ -1036,8 +1036,9 @@ the equal ordering fields. NOTE: we compare the fields as binary strings!
 @param[in]	heap		memory heap from which allocated
 @param[in]	mysql_table	NULL, or mysql table object when
 				user thread invokes dml
+@param[out]	error		error number in case of failure
 @return own: update vector of differing fields, excluding roll ptr and
-trx id */
+trx id,if error is not equal to DB_SUCCESS, return NULL */
 upd_t*
 row_upd_build_difference_binary(
 	dict_index_t*	index,
@@ -1047,7 +1048,8 @@ row_upd_build_difference_binary(
 	bool		no_sys,
 	trx_t*		trx,
 	mem_heap_t*	heap,
-	TABLE*		mysql_table)
+	TABLE*		mysql_table,
+	dberr_t*	error)
 {
 	upd_field_t*	upd_field;
 	dfield_t*	dfield;
@@ -1159,6 +1161,10 @@ row_upd_build_difference_binary(
 				update->old_vrow, col, index,
 				&v_heap, heap, NULL, thd, mysql_table, record,
 				NULL, NULL, NULL);
+			if (vfield == NULL) {
+				*error = DB_COMPUTE_VALUE_FAILED;
+				return(NULL);
+			}
 
 			if (!dfield_data_is_binary_equal(
 				dfield, vfield->len,