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[8.0] Fix error handling in olap mode #6940

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merged 4 commits into from
Oct 26, 2020
Merged

[8.0] Fix error handling in olap mode #6940

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5e67474
added e2e test for insert statement in olap mode
harshit-gangal Oct 24, 2020
a284ae0
check error before calling callback
harshit-gangal Oct 24, 2020
cc8c593
fix test to delete row afterwards
harshit-gangal Oct 24, 2020
811d288
addressed review comment
harshit-gangal Oct 26, 2020
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14 changes: 14 additions & 0 deletions go/test/endtoend/vtgate/misc_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -328,6 +328,7 @@ func TestOffsetAndLimitWithOLAP(t *testing.T) {
conn, err := mysql.Connect(ctx, &vtParams)
require.NoError(t, err)
defer conn.Close()
defer exec(t, conn, "set workload=oltp;delete from t1")

exec(t, conn, "insert into t1(id1, id2) values (1, 1), (2, 2), (3, 3), (4, 4), (5, 5)")
assertMatches(t, conn, "select id1 from t1 order by id1 limit 3 offset 2", "[[INT64(3)] [INT64(4)] [INT64(5)]]")
Expand Down Expand Up @@ -371,6 +372,19 @@ func TestUseStmtInOLAP(t *testing.T) {
}
}

func TestInsertStmtInOLAP(t *testing.T) {
defer cluster.PanicHandler(t)
ctx := context.Background()
conn, err := mysql.Connect(ctx, &vtParams)
require.NoError(t, err)
defer conn.Close()

exec(t, conn, `set workload='olap'`)
_, err = conn.ExecuteFetch(`insert into t1(id1, id2) values (1, 1), (2, 2), (3, 3), (4, 4), (5, 5)`, 1000, true)
require.Error(t, err)
assertMatches(t, conn, `select id1 from t1 order by id1`, `[]`)
}

func assertMatches(t *testing.T, conn *mysql.Conn, query, expected string) {
t.Helper()
qr := exec(t, conn, query)
Expand Down
21 changes: 11 additions & 10 deletions go/vt/vtgate/executor.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1196,22 +1196,23 @@ func (e *Executor) StreamExecute(ctx context.Context, method string, safeSession
return nil
})

// Send left-over rows.
if len(result.Rows) > 0 || !seenResults {
if err := callback(result); err != nil {
return err
// Send left-over rows if there is no error on execution.
if err == nil {
if len(result.Rows) > 0 || !seenResults {
if err := callback(result); err != nil {
return err
}
}
// save session stats for future queries
if !safeSession.foundRowsHandled {
safeSession.FoundRows = foundRows
}
safeSession.RowCount = -1
}

logStats.ExecuteTime = time.Since(execStart)
e.updateQueryCounts(plan.Instructions.RouteType(), plan.Instructions.GetKeyspaceName(), plan.Instructions.GetTableName(), int64(logStats.ShardQueries))

// save session stats for future queries
if !safeSession.foundRowsHandled {
safeSession.FoundRows = foundRows
}
safeSession.RowCount = -1

return err
}

Expand Down