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z_lob_test.go
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z_lob_test.go
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// Copyright 2019, 2020 The Godror Authors
//
//
// SPDX-License-Identifier: UPL-1.0 OR Apache-2.0
package godror_test
import (
"bytes"
"context"
"database/sql"
"database/sql/driver"
"errors"
"fmt"
"io"
"log"
"strings"
"sync"
"testing"
"time"
"unicode/utf8"
godror "github.com/godror/godror"
"github.com/godror/godror/dsn"
"github.com/google/go-cmp/cmp"
)
func TestInsertLargeLOB(t *testing.T) {
ctx, cancel := context.WithTimeout(testContext("InsertLargeLOB"), 60*time.Second)
defer cancel()
tbl := "test_insert_large_lob" + tblSuffix
drQry := "DROP TABLE " + tbl
_, _ = testDb.ExecContext(ctx, drQry)
crQry := "CREATE TABLE " + tbl + " (F_size NUMBER(9) NOT NULL, F_data CLOB NOT NULL)"
if _, err := testDb.ExecContext(ctx, crQry); err != nil {
t.Fatal(crQry, err)
}
defer func() { _, _ = testDb.ExecContext(context.Background(), drQry) }()
const str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_-"
insQry := "INSERT INTO " + tbl + " (F_size, F_data) VALUES (:1, :2)"
selQry := "SELECT DBMS_LOB.getlength(F_data) FROM " + tbl + " WHERE F_size = :1"
selStmt, err := testDb.PrepareContext(ctx, selQry)
if err != nil {
t.Fatalf("%s: %+v", selQry, err)
}
defer selStmt.Close()
shortCtx, shortCancel := context.WithTimeout(ctx, 30*time.Second)
defer shortCancel()
dl, _ := shortCtx.Deadline()
var n int64
now := time.Now()
for _, size := range []int{
2049,
1<<20 - 1, 1<<20 + 1,
2017371,
16<<20 + 1,
//1_073_741_822 + 1,
} {
if testing.Short() && size > 1<<21 {
break
}
if n > 1<<20 {
if est := (time.Since(now) / time.Duration(n)) * time.Duration(size); est > time.Until(dl) {
t.Log("SKIP", size, "est", est)
break
}
}
data := (strings.Repeat(str, (size+len(str)-1)/len(str)) + str[:size%(len(str))])[:size]
t.Log(size, len(data))
if _, err := testDb.ExecContext(shortCtx, insQry, size, godror.Lob{Reader: strings.NewReader(data), IsClob: true}); err != nil {
var ec interface{ Code() int }
if errors.Is(err, context.DeadlineExceeded) || errors.As(err, &ec) && ec.Code() == 1013 {
t.Log(err)
break
}
t.Fatalf("%s [%d, %d]: %+v", insQry, size, len(data), err)
}
n += int64(len(data))
var got int
if err := selStmt.QueryRowContext(ctx, size).Scan(&got); err != nil {
t.Fatalf("%s [%d]: %+v", selQry, size, err)
}
if got != size {
t.Errorf("got %d wanted %d", got, size)
break
}
}
}
func TestCloseTempLOB(t *testing.T) {
//godror.SetLogger(godror.NewLogfmtLogger(os.Stdout))
P, err := dsn.Parse(testConStr)
if err != nil {
t.Fatal(err)
}
if P.StandaloneConnection {
t.Skip("TestCloseTempLOB needs pooled connection")
}
ctx, cancel := context.WithTimeout(testContext("CloseTempLOB"), 30*time.Second)
defer cancel()
var wg, start sync.WaitGroup
start.Add(1)
const maxConn = 2*maxSessions + 1
wg.Add(maxConn)
for j := 0; j < maxConn; j++ {
t.Logf("Run %d\n", j)
go func(n int) {
start.Wait()
err := newTempLob(ctx, testDb)
wg.Done()
if err != nil {
log.Println(err.Error())
}
t.Logf("Finish %d\n", n)
}(j)
}
start.Done()
wg.Wait()
}
func newTempLob(ctx context.Context, db *sql.DB) error {
data := []byte{0, 1, 2, 3, 4, 5}
conn, err := db.Conn(ctx)
if err != nil {
return err
}
defer conn.Close()
return godror.Raw(ctx, conn,
func(c godror.Conn) error {
lob, err := c.(interface {
NewTempLob(bool) (*godror.DirectLob, error)
}).NewTempLob(false)
if err != nil {
return err
}
_, err = lob.WriteAt(data, 0)
if closeErr := lob.Close(); closeErr != nil && err == nil {
err = closeErr
}
return err
},
)
}
func TestSplitLOB(t *testing.T) {
ctx, cancel := context.WithTimeout(testContext("SplitLOB"), 30*time.Second)
defer cancel()
tx, err := testDb.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
want := "árvíztűrő tükörfúrógép"
n := 32767 / len(want)
want = strings.Repeat(want, n)
runesLen := utf8.RuneCount([]byte(want))
t.Logf("%d runes, %d bytes", runesLen, len(want))
const qry = `DECLARE
v_text CONSTANT VARCHAR2(32767) := SUBSTR(:1, 1, 32767);
v_len CONSTANT PLS_INTEGER := :2;
v_clob CLOB;
BEGIN
DBMS_LOB.createtemporary(v_clob, TRUE, DBMS_LOB.session);
DBMS_LOB.writeappend(v_clob, v_len, v_text);
:3 := v_clob;
END;`
var lob godror.Lob
lob.IsClob = true
stmt, err := tx.PrepareContext(ctx, qry)
if err != nil {
t.Fatalf("%s: %+v", qry, err)
}
defer stmt.Close()
if _, err := stmt.ExecContext(ctx, want, runesLen, sql.Out{Dest: &lob}); err != nil {
t.Fatalf("%s: %+v", qry, err)
}
t.Log("lob:", lob)
b, err := io.ReadAll(lob)
if err != nil {
t.Fatal(err)
}
got := string(b)
t.Logf("sent %d bytes, got %d", len(want), len(got))
if d := cmp.Diff(want, got); d != "" {
//t.Fatal("mismatch")
t.Error("mismatch:", d)
}
}
func TestReadLargeLOB(t *testing.T) {
qry := `CREATE OR REPLACE FUNCTION test_readlargelob(p_size IN PLS_INTEGER) RETURN CLOB IS
v_clob CLOB;
i PLS_INTEGER;
BEGIN
DBMS_LOB.createtemporary(v_clob, TRUE, DBMS_LOB.session);
FOR i IN 1..NVL(p_size, 0)/10 + 1 LOOP
DBMS_LOB.writeappend(v_clob, 10, LPAD(i, 9, ' ')||CHR(10));
END LOOP;
RETURN(v_clob);
END;`
if _, err := testDb.ExecContext(context.Background(), qry); err != nil {
t.Fatalf("%s: %+v", qry, err)
}
defer func() { testDb.ExecContext(context.Background(), "DROP FUNCTION test_readlargelob") }()
ctx, cancel := context.WithTimeout(testContext("ReadLargeLOB"), 30*time.Second)
defer cancel()
tx, err := testDb.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
for _, orig := range []int64{12, 512 + 1, 8132/5 + 1, 8132/2 + 1, 8132 + 1, 32768} {
qry := "BEGIN :1 := DBMS_LOB.getlength(test_readlargelob(:2)); END;"
var wantSize int64
if _, err = tx.ExecContext(ctx, qry, sql.Out{Dest: &wantSize}, orig); err != nil {
t.Fatalf("%s: %+v", qry, err)
}
t.Logf("n=%d", wantSize)
qry = "BEGIN :1 := test_readlargelob(:2); END;"
stmt, err := tx.PrepareContext(ctx, qry)
if err != nil {
t.Fatalf("%s: %+v", qry, err)
}
defer stmt.Close()
lob := godror.Lob{IsClob: true}
if _, err = stmt.ExecContext(ctx, sql.Out{Dest: &lob}, orig); err != nil {
t.Fatalf("%s [CLOB %d]: %+v", qry, orig, err)
}
buf := bytes.NewBuffer(make([]byte, 0, wantSize))
for i := 0; i < int(wantSize/10); i++ {
fmt.Fprintf(buf, "% 9d\n", i+1)
}
want := buf.Bytes()
got, err := io.ReadAll(lob)
gotSize := int64(len(got))
t.Logf("Read %d bytes from CLOB: %+v", gotSize, err)
if err != nil {
t.Error(err)
}
if gotSize != wantSize {
t.Errorf("got %d, wanted %d", gotSize, wantSize)
}
if d := cmp.Diff(got, want); d != "" {
t.Error(d)
}
var gotS string
if _, err = stmt.ExecContext(ctx, sql.Out{Dest: &gotS}, orig); err != nil {
if orig > 32767 {
t.Logf("%s [string %d]: %+v", qry, orig, err)
continue
}
t.Fatalf("%s [string %d]: %+v", qry, orig, err)
}
gotSize = int64(len(gotS))
t.Logf("Read %d bytes from LOB as string: %+v", gotSize, err)
if gotSize != wantSize {
t.Errorf("got %d, wanted %d", gotSize, wantSize)
}
if d := cmp.Diff(got, want); d != "" {
t.Error(d)
}
}
}
func TestLOBAppend(t *testing.T) {
ctx, cancel := context.WithTimeout(testContext("LOBAppend"), 30*time.Second)
defer cancel()
// To have a valid LOB locator, we have to keep the Stmt around.
const qry = `BEGIN DBMS_LOB.createtemporary(:1, TRUE, DBMS_LOB.SESSION); END;`
conn, err := testDb.Conn(ctx)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
stmt, err := conn.PrepareContext(ctx, qry)
if err != nil {
t.Fatalf("%q: %+v", qry, err)
}
defer stmt.Close()
var tmp godror.Lob
if _, err := stmt.ExecContext(ctx, sql.Out{Dest: &tmp}); err != nil {
t.Fatalf("Failed to create temporary lob: %+v", err)
}
t.Logf("tmp: %#v", tmp)
want := [...]byte{1, 2, 3, 4, 5}
if _, err := conn.ExecContext(ctx,
"BEGIN dbms_lob.append(:1, :2); END;",
tmp, godror.Lob{Reader: bytes.NewReader(want[:])},
); err != nil {
var ec interface{ Code() int }
if errors.As(err, &ec) && ec.Code() == 3106 || errors.Is(err, driver.ErrBadConn) {
t.Skip(err)
}
t.Fatalf("Failed to write buffer(%v) to lob(%v): %+v", want, tmp, err)
}
// Hijack and Close it.
dl, err := tmp.Hijack()
if err != nil {
t.Fatal(err)
}
defer dl.Close()
length, err := dl.Size()
if err != nil {
t.Fatal(err)
}
t.Logf("length: %d", length)
if length != int64(len(want)) {
t.Errorf("length mismatch: got %d, wanted %d", length, len(want))
}
}
func TestStatWithLOBs(t *testing.T) {
//defer tl.enableLogging(t)()
ctx, cancel := context.WithTimeout(testContext("StatWithLOBs"), 30*time.Second)
defer cancel()
ms, err := newMetricSet(ctx, testDb)
if err != nil {
t.Fatal(err)
}
defer ms.Close()
if _, err = ms.Fetch(ctx); err != nil {
var c interface{ Code() int }
if errors.As(err, &c) && c.Code() == 942 {
t.Skip(err)
return
}
t.Fatal(err)
}
for i := 0; i < 100; i++ {
if err := ctx.Err(); err != nil {
break
}
events, err := ms.Fetch(ctx)
t.Log("events:", len(events))
if err != nil {
t.Fatal(err)
}
}
}
func newMetricSet(ctx context.Context, db *sql.DB) (*metricSet, error) {
qry := "select /* metricset: sqlstats */ inst_id, sql_fulltext, last_active_time from gv$sqlstats WHERE ROWNUM < 11"
tx, err := db.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
if err != nil {
return nil, err
}
stmt, err := tx.PrepareContext(ctx, qry)
if err != nil {
return nil, err
}
return &metricSet{tx: tx, stmt: stmt}, nil
}
type metricSet struct {
tx *sql.Tx
stmt *sql.Stmt
}
func (m *metricSet) Close() error {
tx, st := m.tx, m.stmt
m.tx, m.stmt = nil, nil
if st == nil {
return nil
}
st.Close()
if tx == nil {
return nil
}
return tx.Rollback()
}
// Fetch methods implements the data gathering and data conversion to the right format
// It returns the event which is then forward to the output. In case of an error, a
// descriptive error must be returned.
func (m *metricSet) Fetch(ctx context.Context) ([]event, error) {
ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
rows, err := m.stmt.QueryContext(ctx)
if err != nil {
return nil, err
}
defer rows.Close()
var events []event
for rows.Next() {
var e event
if err := rows.Scan(&e.ID, &e.Text, &e.LastActive); err != nil {
return events, err
}
events = append(events, e)
}
return events, nil
}
type event struct {
LastActive time.Time
Text string
ID int64
}