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async_test.go
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async_test.go
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// Copyright (c) 2021-2023 Snowflake Computing Inc. All rights reserved.
package gosnowflake
import (
"context"
"fmt"
"testing"
"time"
)
func TestAsyncMode(t *testing.T) {
ctx := WithAsyncMode(context.Background())
numrows := 100000
cnt := 0
var idx int
var v string
runDBTest(t, func(dbt *DBTest) {
rows := dbt.mustQueryContext(ctx, fmt.Sprintf(selectRandomGenerator, numrows))
defer rows.Close()
// Next() will block and wait until results are available
for rows.Next() {
if err := rows.Scan(&idx, &v); err != nil {
t.Fatal(err)
}
cnt++
}
logger.Infof("NextResultSet: %v", rows.NextResultSet())
if cnt != numrows {
t.Errorf("number of rows didn't match. expected: %v, got: %v", numrows, cnt)
}
dbt.mustExec("create or replace table test_async_exec (value boolean)")
res := dbt.mustExecContext(ctx, "insert into test_async_exec values (true)")
count, err := res.RowsAffected()
if err != nil {
t.Fatalf("res.RowsAffected() returned error: %v", err)
}
if count != 1 {
t.Fatalf("expected 1 affected row, got %d", count)
}
})
}
func TestAsyncModePing(t *testing.T) {
ctx := WithAsyncMode(context.Background())
runDBTest(t, func(dbt *DBTest) {
defer func() {
if r := recover(); r != nil {
t.Fatalf("panic during ping: %v", r)
}
}()
err := dbt.conn.PingContext(ctx)
if err != nil {
t.Fatal(err)
}
})
}
func TestAsyncModeMultiStatement(t *testing.T) {
withMultiStmtCtx, _ := WithMultiStatement(context.Background(), 6)
ctx := WithAsyncMode(withMultiStmtCtx)
multiStmtQuery := "begin;\n" +
"delete from test_multi_statement_async;\n" +
"insert into test_multi_statement_async values (1, 'a'), (2, 'b');\n" +
"select 1;\n" +
"select 2;\n" +
"rollback;"
runDBTest(t, func(dbt *DBTest) {
dbt.mustExec("drop table if exists test_multi_statement_async")
dbt.mustExec(`create or replace table test_multi_statement_async(
c1 number, c2 string) as select 10, 'z'`)
defer dbt.mustExec("drop table if exists test_multi_statement_async")
res := dbt.mustExecContext(ctx, multiStmtQuery)
count, err := res.RowsAffected()
if err != nil {
t.Fatalf("res.RowsAffected() returned error: %v", err)
}
if count != 3 {
t.Fatalf("expected 3 affected rows, got %d", count)
}
})
}
func TestAsyncModeCancel(t *testing.T) {
withCancelCtx, cancel := context.WithCancel(context.Background())
ctx := WithAsyncMode(withCancelCtx)
numrows := 100000
runDBTest(t, func(dbt *DBTest) {
dbt.mustQueryContext(ctx, fmt.Sprintf(selectRandomGenerator, numrows))
cancel()
})
}
const (
//selectTimelineGenerator = "SELECT COUNT(*) FROM TABLE(GENERATOR(TIMELIMIT=>%v))"
selectTimelineGenerator = "SELECT SYSTEM$WAIT(%v, 'SECONDS')"
)
func TestAsyncModeNoFetch(t *testing.T) {
ctx := WithAsyncMode(WithAsyncModeNoFetch(context.Background()))
// the default behavior of the async wait is to wait for 45s. We want to make sure we wait until the query actually
// completes, so we make the test take longer than 45s
secondsToRun := 50
runDBTest(t, func(dbt *DBTest) {
start := time.Now()
rows := dbt.mustQueryContext(ctx, fmt.Sprintf(selectTimelineGenerator, secondsToRun))
defer rows.Close()
// Next() will block and wait until results are available
if rows.Next() == true {
t.Fatalf("next should have returned no rows")
}
columns, err := rows.Columns()
if columns != nil {
t.Fatalf("there should be no column array returned")
}
if err == nil {
t.Fatalf("we should have an error thrown")
}
if rows.Scan(nil) == nil {
t.Fatalf("we should have an error thrown")
}
if (time.Second * time.Duration(secondsToRun)) > time.Since(start) {
t.Fatalf("tset should should have run for %d seconds", secondsToRun)
}
dbt.mustExec("create or replace table test_async_exec (value boolean)")
res := dbt.mustExecContext(ctx, "insert into test_async_exec values (true)")
count, err := res.RowsAffected()
if err != nil {
t.Fatalf("res.RowsAffected() returned error: %v", err)
}
if count != 1 {
t.Fatalf("expected 1 affected row, got %d", count)
}
})
}
func TestAsyncQueryFail(t *testing.T) {
ctx := WithAsyncMode(context.Background())
runDBTest(t, func(dbt *DBTest) {
rows := dbt.mustQueryContext(ctx, "selectt 1")
defer rows.Close()
if rows.Next() {
t.Fatal("should have no rows available")
} else {
if err := rows.Err(); err == nil {
t.Fatal("should return a syntax error")
}
}
})
}
func TestMultipleAsyncQueries(t *testing.T) {
ctx := WithAsyncMode(context.Background())
s1 := "foo"
s2 := "bar"
ch1 := make(chan string)
ch2 := make(chan string)
runDBTest(t, func(dbt *DBTest) {
rows1 := dbt.mustQueryContext(ctx, fmt.Sprintf("select distinct '%v' from table (generator(timelimit=>%v))", s1, 30))
defer rows1.Close()
rows2 := dbt.mustQueryContext(ctx, fmt.Sprintf("select distinct '%v' from table (generator(timelimit=>%v))", s2, 10))
defer rows2.Close()
go retrieveRows(rows1, ch1)
go retrieveRows(rows2, ch2)
select {
case res := <-ch1:
t.Fatalf("value %v should not have been called earlier.", res)
case res := <-ch2:
if res != s2 {
t.Fatalf("query failed. expected: %v, got: %v", s2, res)
}
}
})
}
func TestMultipleAsyncSuccessAndFailedQueries(t *testing.T) {
ctx := WithAsyncMode(context.Background())
ctx, cancel := context.WithTimeout(ctx, time.Second*5)
defer cancel()
s1 := "foo"
s2 := "bar"
ch1 := make(chan string)
ch2 := make(chan string)
runDBTest(t, func(dbt *DBTest) {
rows1 := dbt.mustQueryContext(ctx, fmt.Sprintf("select distinct '%s' from table (generator(timelimit=>3))", s1))
defer rows1.Close()
rows2 := dbt.mustQueryContext(ctx, fmt.Sprintf("select distinct '%s' from table (generator(timelimit=>7))", s2))
defer rows2.Close()
go retrieveRows(rows1, ch1)
go retrieveRows(rows2, ch2)
res1 := <-ch1
if res1 != s1 {
t.Fatalf("query failed. expected: %v, got: %v", s1, res1)
}
// wait until rows2 is done
<-ch2
driverErr, ok := rows2.Err().(*SnowflakeError)
if !ok || driverErr == nil || driverErr.Number != ErrAsync {
t.Fatalf("Snowflake ErrAsync expected. got: %T, %v", rows2.Err(), rows2.Err())
}
})
}
func retrieveRows(rows *RowsExtended, ch chan string) {
var s string
for rows.Next() {
if err := rows.Scan(&s); err != nil {
ch <- err.Error()
close(ch)
return
}
}
ch <- s
close(ch)
}
func TestLongRunningAsyncQuery(t *testing.T) {
conn := openConn(t)
defer conn.Close()
ctx, _ := WithMultiStatement(context.Background(), 0)
query := "CALL SYSTEM$WAIT(50, 'SECONDS');use snowflake_sample_data"
rows, err := conn.QueryContext(WithAsyncMode(ctx), query)
if err != nil {
t.Fatalf("failed to run a query. %v, err: %v", query, err)
}
defer rows.Close()
var v string
i := 0
for {
for rows.Next() {
err := rows.Scan(&v)
if err != nil {
t.Fatalf("failed to get result. err: %v", err)
}
if v == "" {
t.Fatal("should have returned a result")
}
results := []string{"waited 50 seconds", "Statement executed successfully."}
if v != results[i] {
t.Fatalf("unexpected result returned. expected: %v, but got: %v", results[i], v)
}
i++
}
if !rows.NextResultSet() {
break
}
}
}