MDEV-20618 Assertion failed in row_upd_sec_index_entry

Add a proper error handling of innobase_get_computed_value results in
row_upd_store_row/row_upd_store_v_row.

Also add an assertion in row_vers_build_clust_v_col to fail during row
purge.
Add one more assertion in row_sel_sec_rec_is_for_clust_rec for possible
future catches.

mysql-test/suite/gcol/inc/gcol_keys.inc

@@ -747,4 +747,66 @@ ANALYZE TABLE t1, t2;
 --eval $query
 DROP TABLE t1, t2;
 
+if($support_virtual_index)
+{
+--echo #
+--echo # MDEV-20618 Assertion `btr_validate_index(index, 0, false)' failed
+--echo # in row_upd_sec_index_entry
+--echo #
+CREATE TABLE t1 (A BIT(15), VA BIT(10) GENERATED ALWAYS AS (A),PK INT,
+                 PRIMARY KEY (PK), UNIQUE KEY (VA));
+
+INSERT IGNORE INTO t1 VALUES ( '\r1','a',1);
+--error ER_DATA_TOO_LONG
+REPLACE INTO t1 (PK) VALUES (1);
+
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17890 Record in index was not found on update, server crash in
+--echo # row_upd_build_difference_binary or
+--echo # Assertion `0' failed in row_upd_sec_index_entry
+--echo #
+CREATE TABLE t1 (
+  pk BIGINT AUTO_INCREMENT,
+  b BIT(15),
+  v BIT(10) AS (b) VIRTUAL,
+  PRIMARY KEY(pk),
+  UNIQUE(v)
+);
+
+INSERT IGNORE INTO t1 (b) VALUES (b'101110001110100'),(b'011101');
+SELECT pk, b INTO OUTFILE 'load.data' FROM t1;
+--error ER_DATA_TOO_LONG
+LOAD DATA INFILE 'load.data' REPLACE INTO TABLE t1 (pk, b);
+
+--let $datadir= `SELECT @@datadir`
+--remove_file $datadir/test/load.data
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17834 Server crashes in row_upd_build_difference_binary
+--echo # on LOAD DATA into table with indexed virtual column
 --echo #
+CREATE TABLE t1 (
+  pk INT,
+  i TINYINT,
+  ts TIMESTAMP NULL,
+  vi TINYINT AS (i+1) PERSISTENT,
+  vts TIMESTAMP(5) AS (ts) VIRTUAL,
+  PRIMARY KEY(pk),
+  UNIQUE(vts)
+);
+
+INSERT IGNORE INTO t1 (pk,i) VALUES (1,127);
+
+--write_file $MYSQLTEST_VARDIR/tmp/load.data
+1	4	2019-01-01 00:00:00
+EOF
+--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
+--error ER_WARN_DATA_OUT_OF_RANGE
+eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/load.data' REPLACE INTO TABLE t1 (pk,i,ts);
+
+--remove_file $MYSQLTEST_VARDIR/tmp/load.data
+DROP TABLE t1;
+}

mysql-test/suite/gcol/r/gcol_keys_innodb.result

@@ -825,6 +825,56 @@ a1	a2	b
 0	NULL	1
 DROP TABLE t1, t2;
 #
+# MDEV-20618 Assertion `btr_validate_index(index, 0, false)' failed
+# in row_upd_sec_index_entry
+#
+CREATE TABLE t1 (A BIT(15), VA BIT(10) GENERATED ALWAYS AS (A),PK INT,
+PRIMARY KEY (PK), UNIQUE KEY (VA));
+INSERT IGNORE INTO t1 VALUES ( '\r1','a',1);
+Warnings:
+Warning	1906	The value specified for generated column 'VA' in table 't1' has been ignored
+Warning	1264	Out of range value for column 'VA' at row 1
+REPLACE INTO t1 (PK) VALUES (1);
+ERROR 22001: Data too long for column 'VA' at row 1
+DROP TABLE t1;
+#
+# MDEV-17890 Record in index was not found on update, server crash in
+# row_upd_build_difference_binary or
+# Assertion `0' failed in row_upd_sec_index_entry
+#
+CREATE TABLE t1 (
+pk BIGINT AUTO_INCREMENT,
+b BIT(15),
+v BIT(10) AS (b) VIRTUAL,
+PRIMARY KEY(pk),
+UNIQUE(v)
+);
+INSERT IGNORE INTO t1 (b) VALUES (b'101110001110100'),(b'011101');
+Warnings:
+Warning	1264	Out of range value for column 'v' at row 1
+SELECT pk, b INTO OUTFILE 'load.data' FROM t1;
+LOAD DATA INFILE 'load.data' REPLACE INTO TABLE t1 (pk, b);
+ERROR 22001: Data too long for column 'v' at row 1
+DROP TABLE t1;
+#
+# MDEV-17834 Server crashes in row_upd_build_difference_binary
+# on LOAD DATA into table with indexed virtual column
+#
+CREATE TABLE t1 (
+pk INT,
+i TINYINT,
+ts TIMESTAMP NULL,
+vi TINYINT AS (i+1) PERSISTENT,
+vts TIMESTAMP(5) AS (ts) VIRTUAL,
+PRIMARY KEY(pk),
+UNIQUE(vts)
+);
+INSERT IGNORE INTO t1 (pk,i) VALUES (1,127);
+Warnings:
+Warning	1264	Out of range value for column 'vi' at row 1
+LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/load.data' REPLACE INTO TABLE t1 (pk,i,ts);
+ERROR 22003: Out of range value for column 'vi' at row 1
+DROP TABLE t1;
 #
 # BUG#21365158 WL8149:ASSERTION `!TABLE || (!TABLE->WRITE_SET
 #

mysql-test/suite/gcol/r/gcol_keys_myisam.result

@@ -827,6 +827,56 @@ a1	a2	b
 0	NULL	1
 DROP TABLE t1, t2;
 #
+# MDEV-20618 Assertion `btr_validate_index(index, 0, false)' failed
+# in row_upd_sec_index_entry
+#
+CREATE TABLE t1 (A BIT(15), VA BIT(10) GENERATED ALWAYS AS (A),PK INT,
+PRIMARY KEY (PK), UNIQUE KEY (VA));
+INSERT IGNORE INTO t1 VALUES ( '\r1','a',1);
+Warnings:
+Warning	1906	The value specified for generated column 'VA' in table 't1' has been ignored
+Warning	1264	Out of range value for column 'VA' at row 1
+REPLACE INTO t1 (PK) VALUES (1);
+ERROR 22001: Data too long for column 'VA' at row 1
+DROP TABLE t1;
+#
+# MDEV-17890 Record in index was not found on update, server crash in
+# row_upd_build_difference_binary or
+# Assertion `0' failed in row_upd_sec_index_entry
+#
+CREATE TABLE t1 (
+pk BIGINT AUTO_INCREMENT,
+b BIT(15),
+v BIT(10) AS (b) VIRTUAL,
+PRIMARY KEY(pk),
+UNIQUE(v)
+);
+INSERT IGNORE INTO t1 (b) VALUES (b'101110001110100'),(b'011101');
+Warnings:
+Warning	1264	Out of range value for column 'v' at row 1
+SELECT pk, b INTO OUTFILE 'load.data' FROM t1;
+LOAD DATA INFILE 'load.data' REPLACE INTO TABLE t1 (pk, b);
+ERROR 22001: Data too long for column 'v' at row 1
+DROP TABLE t1;
+#
+# MDEV-17834 Server crashes in row_upd_build_difference_binary
+# on LOAD DATA into table with indexed virtual column
+#
+CREATE TABLE t1 (
+pk INT,
+i TINYINT,
+ts TIMESTAMP NULL,
+vi TINYINT AS (i+1) PERSISTENT,
+vts TIMESTAMP(5) AS (ts) VIRTUAL,
+PRIMARY KEY(pk),
+UNIQUE(vts)
+);
+INSERT IGNORE INTO t1 (pk,i) VALUES (1,127);
+Warnings:
+Warning	1264	Out of range value for column 'vi' at row 1
+LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/load.data' REPLACE INTO TABLE t1 (pk,i,ts);
+ERROR 22003: Out of range value for column 'vi' at row 1
+DROP TABLE t1;
 DROP VIEW  IF EXISTS v1,v2;
 DROP TABLE IF EXISTS t1,t2,t3;
 DROP PROCEDURE IF EXISTS p1;

mysql-test/suite/vcol/r/vcol_misc.result

@@ -456,8 +456,7 @@ select pk, col_bit+0, vcol_bit+0 from t1;
 pk	col_bit+0	vcol_bit+0
 99	10000	1023
 REPLACE LOW_PRIORITY INTO `t1` (`pk`) VALUES (99);
-Warnings:
-Warning	1264	Out of range value for column 'vcol_bit' at row 1
+ERROR 22001: Data too long for column 'vcol_bit' at row 1
 drop table t1;
 #
 # MDEV-17837 REPLACE on table with virtual_field can cause crash in set_ok_status()
@@ -476,8 +475,7 @@ INSERT IGNORE INTO t1 (pk,i) VALUES (1,127);
 Warnings:
 Warning	1264	Out of range value for column 'vi' at row 1
 REPLACE INTO t1 (pk,i) VALUES (1,2);
-Warnings:
-Warning	1264	Out of range value for column 'vi' at row 1
+ERROR 22003: Out of range value for column 'vi' at row 1
 DROP TABLE t1;
 SET @sql_mode=@old_sql_mode;
 #

mysql-test/suite/vcol/t/vcol_misc.test

@@ -431,6 +431,7 @@ replace INTO `t1` (`pk`,col_bit) VALUES (99,1000);
 select pk, col_bit+0, vcol_bit+0 from t1;
 replace INTO `t1` (`pk`,col_bit) VALUES (99,10000);
 select pk, col_bit+0, vcol_bit+0 from t1;
+--error ER_DATA_TOO_LONG
 REPLACE LOW_PRIORITY INTO `t1` (`pk`) VALUES (99);
 drop table t1;
 
@@ -451,6 +452,7 @@ CREATE TABLE t1 (
 INSERT INTO t1 (pk,i) VALUES (1,1);
 TRUNCATE TABLE t1;
 INSERT IGNORE INTO t1 (pk,i) VALUES (1,127);
+--error ER_WARN_DATA_OUT_OF_RANGE
 REPLACE INTO t1 (pk,i) VALUES (1,2);
 DROP TABLE t1;
 SET @sql_mode=@old_sql_mode;

sql/sql_insert.cc

@@ -1748,15 +1748,13 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
       }
       if (table->vfield)
       {
-        my_bool abort_on_warning= thd->abort_on_warning;
         /*
           We have not yet called update_virtual_fields(VOL_UPDATE_FOR_READ)
           in handler methods for the just read row in record[1].
         */
         table->move_fields(table->field, table->record[1], table->record[0]);
-        thd->abort_on_warning= 0;
-        table->update_virtual_fields(table->file, VCOL_UPDATE_FOR_REPLACE);
-        thd->abort_on_warning= abort_on_warning;
+        if (table->update_virtual_fields(table->file, VCOL_UPDATE_FOR_REPLACE))
+          goto err;
         table->move_fields(table->field, table->record[0], table->record[1]);
       }
       if (info->handle_duplicates == DUP_UPDATE)

storage/innobase/handler/ha_innodb.cc

@@ -103,6 +103,7 @@ this program; if not, write to the Free Software Foundation, Inc.,
 #include "srv0mon.h"
 #include "srv0srv.h"
 #include "srv0start.h"
+#include "rem0rec.h"
 #ifdef UNIV_DEBUG
 #include "trx0purge.h"
 #endif /* UNIV_DEBUG */
@@ -21881,6 +21882,13 @@ void innobase_free_row_for_vcol(VCOL_STORAGE *storage)
 }
 
 
+void innobase_report_computed_value_failed(dtuple_t *row)
+{
+  ib::error() << "Compute virtual column values failed for "
+              << rec_printer(row).str();
+}
+
+
 /** Get the computed value by supplying the base column values.
 @param[in,out]	row		the data row
 @param[in]	col		virtual column
@@ -22008,13 +22016,6 @@ innobase_get_computed_value(
 	dbug_tmp_restore_column_map(mysql_table->write_set, old_write_set);
 
 	if (ret != 0) {
-	// FIXME: Why this error message is macro-hidden?
-#ifdef INNODB_VIRTUAL_DEBUG
-		ib::warn() << "Compute virtual column values failed ";
-		fputs("InnoDB: Cannot compute value for following record ",
-		      stderr);
-		dtuple_print(stderr, row);
-#endif /* INNODB_VIRTUAL_DEBUG */
 		DBUG_RETURN(NULL);
 	}
 

storage/innobase/include/row0mysql.h

@@ -874,6 +874,12 @@ class ib_vcol_row
   }
 };
 
+/** Report virtual value computation failure in ib::error
+@param[in]    row    the data row
+*/
+ATTRIBUTE_COLD
+void innobase_report_computed_value_failed(dtuple_t *row);
+
 /** Get the computed value by supplying the base column values.
 @param[in,out]	row		the data row
 @param[in]	col		virtual column

storage/innobase/row/row0sel.cc

@@ -154,11 +154,15 @@ fields are compared with collation!
 				must be protected by a page s-latch
 @param[in]	clust_index	clustered index
 @param[in]	thr		query thread
-@return TRUE if the secondary record is equal to the corresponding
-fields in the clustered record, when compared with collation;
-FALSE if not equal or if the clustered record has been marked for deletion */
+@retval	DB_COMPUTE_VALUE_FAILED in case of virtual column value computation
+	failure.
+@retval DB_SUCCESS_LOCKED_REC if the secondary record is equal to the
+	corresponding fields in the clustered record, when compared with
+	collation;
+@retval DB_SUCCESS if not equal or if the clustered record has been marked
+	for deletion */
 static
-ibool
+dberr_t
 row_sel_sec_rec_is_for_clust_rec(
 	const rec_t*	sec_rec,
 	dict_index_t*	sec_index,
@@ -190,7 +194,7 @@ row_sel_sec_rec_is_for_clust_rec(
 		it is not visible in the read view.  Besides,
 		if there are any externally stored columns,
 		some of them may have already been purged. */
-		return(FALSE);
+		return DB_SUCCESS;
 	}
 
 	heap = mem_heap_create(256);
@@ -242,6 +246,10 @@ row_sel_sec_rec_is_for_clust_rec(
 					thr->prebuilt->m_mysql_table,
 					record, NULL, NULL, NULL);
 
+			if (vfield == NULL) {
+				innobase_report_computed_value_failed(row);
+				return DB_COMPUTE_VALUE_FAILED;
+			}
 			clust_len = vfield->len;
 			clust_field = static_cast<byte*>(vfield->data);
 		} else {
@@ -275,7 +283,7 @@ row_sel_sec_rec_is_for_clust_rec(
 					    sec_field, sec_len,
 					    ifield->prefix_len,
 					    clust_index->table)) {
-					return FALSE;
+					return DB_SUCCESS;
 				}
 
 				continue;
@@ -311,19 +319,19 @@ row_sel_sec_rec_is_for_clust_rec(
 			rtr_read_mbr(sec_field, &sec_mbr);
 
 			if (!MBR_EQUAL_CMP(&sec_mbr, &tmp_mbr)) {
-				return FALSE;
+				return DB_SUCCESS;
 			}
 		} else {
 
 			if (0 != cmp_data_data(col->mtype, col->prtype,
 					       clust_field, len,
 					       sec_field, sec_len)) {
-				return FALSE;
+				return DB_SUCCESS;
 			}
 		}
 	}
 
-	return TRUE;
+	return DB_SUCCESS_LOCKED_REC;
 }
 
 /*********************************************************************//**
@@ -890,7 +898,7 @@ row_sel_get_clust_rec(
 	dict_index_t*	index;
 	rec_t*		clust_rec;
 	rec_t*		old_vers;
-	dberr_t		err;
+	dberr_t		err		= DB_SUCCESS;
 	mem_heap_t*	heap		= NULL;
 	rec_offs	offsets_[REC_OFFS_NORMAL_SIZE];
 	rec_offs*	offsets		= offsets_;
@@ -932,7 +940,7 @@ row_sel_get_clust_rec(
 		clustered index record did not exist in the read view of
 		trx. */
 
-		goto func_exit;
+		goto err_exit;
 	}
 
 	offsets = rec_get_offsets(clust_rec, index, offsets, true,
@@ -997,7 +1005,7 @@ row_sel_get_clust_rec(
 			clust_rec = old_vers;
 
 			if (clust_rec == NULL) {
-				goto func_exit;
+				goto err_exit;
 			}
 		}
 
@@ -1014,13 +1022,14 @@ row_sel_get_clust_rec(
 		visit through secondary index records that would not really
 		exist in our snapshot. */
 
-		if ((old_vers
-		     || rec_get_deleted_flag(rec, dict_table_is_comp(
-						     plan->table)))
-		    && !row_sel_sec_rec_is_for_clust_rec(rec, plan->index,
-							 clust_rec, index,
-							 thr)) {
-			goto func_exit;
+		if (old_vers || rec_get_deleted_flag(rec, dict_table_is_comp(
+							       plan->table))) {
+			err = row_sel_sec_rec_is_for_clust_rec(rec,
+							plan->index, clust_rec,
+							index, thr);
+			if (err != DB_SUCCESS_LOCKED_REC) {
+				goto err_exit;
+			}
 		}
 	}
 
@@ -1033,7 +1042,6 @@ row_sel_get_clust_rec(
 	row_sel_fetch_columns(index, clust_rec, offsets,
 			      UT_LIST_GET_FIRST(plan->columns));
 	*out_rec = clust_rec;
-func_exit:
 	err = DB_SUCCESS;
 err_exit:
 	if (UNIV_LIKELY_NULL(heap)) {
@@ -3565,10 +3573,18 @@ Row_sel_get_clust_rec_for_mysql::operator()(
 			|| trx->isolation_level <= TRX_ISO_READ_UNCOMMITTED
 			|| dict_index_is_spatial(sec_index)
 			|| rec_get_deleted_flag(rec, dict_table_is_comp(
-							sec_index->table)))
-		    && !row_sel_sec_rec_is_for_clust_rec(
-			    rec, sec_index, clust_rec, clust_index, thr)) {
-			clust_rec = NULL;
+							sec_index->table)))) {
+			err = row_sel_sec_rec_is_for_clust_rec(rec, sec_index,
+						clust_rec, clust_index, thr);
+			switch (err) {
+			case DB_SUCCESS:
+				clust_rec = NULL;
+				break;
+			case DB_SUCCESS_LOCKED_REC:
+				break;
+			default:
+				goto err_exit;
+			}
 		}
 
 		err = DB_SUCCESS;

storage/innobase/row/row0upd.cc

@@ -2101,9 +2101,11 @@ row_upd_eval_new_vals(
 @param[in,out]	node		row update node
 @param[in]	update		an update vector if it is update
 @param[in]	thd		mysql thread handle
-@param[in,out]	mysql_table	mysql table object */
+@param[in,out]	mysql_table	mysql table object
+@return true if success
+	false if virtual column value computation fails. */
 static
-void
+bool
 row_upd_store_v_row(
 	upd_node_t*	node,
 	const upd_t*	update,
@@ -2165,24 +2167,33 @@ row_upd_store_v_row(
 								  &mysql_table);
 					/* Need to compute, this happens when
 					deleting row */
-					innobase_get_computed_value(
-						node->row, col, index,
-						&vc.heap, node->heap,
-						NULL, thd, mysql_table,
-						record, NULL, NULL, NULL);
+					dfield_t* vfield =
+						innobase_get_computed_value(
+							node->row, col, index,
+							&vc.heap, node->heap,
+							NULL, thd, mysql_table,
+							record, NULL, NULL,
+							NULL);
+					if (vfield == NULL) {
+						return false;
+					}
 				}
 			}
 		}
 	}
+
+	return true;
 }
 
 /** Stores to the heap the row on which the node->pcur is positioned.
 @param[in]	node		row update node
 @param[in]	thd		mysql thread handle
 @param[in,out]	mysql_table	NULL, or mysql table object when
-				user thread invokes dml */
+				user thread invokes dml
+@return false if virtual column value computation fails
+	true otherwise. */
 static
-void
+bool
 row_upd_store_row(
 	upd_node_t*	node,
 	THD*		thd,
@@ -2226,8 +2237,12 @@ row_upd_store_row(
 			      NULL, NULL, NULL, ext, node->heap);
 
 	if (node->table->n_v_cols) {
-		row_upd_store_v_row(node, node->is_delete ? NULL : node->update,
+		bool ok = row_upd_store_v_row(node,
+				    node->is_delete ? NULL : node->update,
 				    thd, mysql_table);
+		if (!ok) {
+			return false;
+		}
 	}
 
 	if (node->is_delete) {
@@ -2242,6 +2257,7 @@ row_upd_store_row(
 	if (UNIV_LIKELY_NULL(heap)) {
 		mem_heap_free(heap);
 	}
+	return true;
 }
 
 /***********************************************************//**
@@ -2957,9 +2973,12 @@ row_upd_del_mark_clust_rec(
 	/* Store row because we have to build also the secondary index
 	entries */
 
-	row_upd_store_row(node, trx->mysql_thd,
+	if (!row_upd_store_row(node, trx->mysql_thd,
 			  thr->prebuilt  && thr->prebuilt->table == node->table
-			  ? thr->prebuilt->m_mysql_table : NULL);
+			  ? thr->prebuilt->m_mysql_table : NULL)) {
+		err = DB_COMPUTE_VALUE_FAILED;
+		return err;
+	}
 
 	/* Mark the clustered index record deleted; we do not have to check
 	locks, because we assume that we have an x-lock on the record */
@@ -3168,8 +3187,11 @@ row_upd_clust_step(
 		goto exit_func;
 	}
 
-	row_upd_store_row(node, trx->mysql_thd,
-			  thr->prebuilt ? thr->prebuilt->m_mysql_table : NULL);
+	if(!row_upd_store_row(node, trx->mysql_thd,
+			thr->prebuilt ? thr->prebuilt->m_mysql_table : NULL)) {
+		err = DB_COMPUTE_VALUE_FAILED;
+		goto exit_func;
+	}
 
 	if (row_upd_changes_ord_field_binary(index, node->update, thr,
 					     node->row, node->ext)) {

storage/innobase/row/row0vers.cc

@@ -445,9 +445,11 @@ row_vers_must_preserve_del_marked(
 @param[in]	clust_index	clustered index
 @param[in]	index		the secondary index
 @param[in]	heap		heap used to build virtual dtuple
-@param[in,out]	vcol_info	virtual column information. */
+@param[in,out]	vcol_info	virtual column information.
+@return		true in case of success
+		false if virtual column computation fails */
 static
-void
+bool
 row_vers_build_clust_v_col(
 	dtuple_t*		row,
 	dict_index_t*		clust_index,
@@ -471,7 +473,8 @@ row_vers_build_clust_v_col(
 
 	if (vcol_info && !vcol_info->table()) {
 		vcol_info->set_table(maria_table);
-		return;
+		// wait for second fetch
+		return true;
 	}
 
 	for (ulint i = 0; i < dict_index_get_n_fields(index); i++) {
@@ -484,12 +487,18 @@ row_vers_build_clust_v_col(
 			col = reinterpret_cast<const dict_v_col_t*>(
 				ind_field->col);
 
-			innobase_get_computed_value(
+			dfield_t *vfield = innobase_get_computed_value(
 				row, col, clust_index, &vc.heap,
 				heap, NULL, thd, maria_table, record, NULL,
 				NULL, NULL);
+			if (vfield == NULL) {
+				innobase_report_computed_value_failed(row);
+				ut_ad(0);
+				return false;
+			}
 		}
 	}
+	return true;
 }
 
 /** Build latest virtual column data from undo log
@@ -826,8 +835,11 @@ row_vers_build_cur_vrow(
 			mtr->commit();
 		}
 
-		row_vers_build_clust_v_col(
+		bool res = row_vers_build_clust_v_col(
 			row, clust_index, index, heap, vcol_info);
+		if (!res) {
+			return NULL;
+		}
 
 		if (vcol_info != NULL && vcol_info->is_first_fetch()) {
 			return NULL;
@@ -948,10 +960,14 @@ row_vers_old_has_index_entry(
 					mtr->commit();
 				}
 
-				row_vers_build_clust_v_col(
+				bool res = row_vers_build_clust_v_col(
 					row, clust_index, index, heap,
 					vcol_info);
 
+				if (!res) {
+					goto unsafe_to_purge;
+				}
+
 				if (vcol_info && vcol_info->is_first_fetch()) {
 					goto unsafe_to_purge;
 				}