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package pgx_test
import (
"context"
"errors"
"os"
"testing"
"time"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/pgconn"
"github.com/jackc/pgx/v5/pgxtest"
"github.com/stretchr/testify/require"
)
func TestTransactionSuccessfulCommit(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
_, err = tx.Exec(context.Background(), "insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Commit(context.Background())
if err != nil {
t.Fatalf("tx.Commit failed: %v", err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 1 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxCommitWhenTxBroken(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
if _, err := tx.Exec(context.Background(), "insert into foo(id) values (1)"); err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
// Purposely break transaction
if _, err := tx.Exec(context.Background(), "syntax error"); err == nil {
t.Fatal("Unexpected success")
}
err = tx.Commit(context.Background())
if err != pgx.ErrTxCommitRollback {
t.Fatalf("Expected error %v, got %v", pgx.ErrTxCommitRollback, err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 0 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxCommitWhenDeferredConstraintFailure(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
pgxtest.SkipCockroachDB(t, conn, "Server does not support deferred constraint (https://github.com/cockroachdb/cockroach/issues/31632)")
createSql := `
create temporary table foo(
id integer,
unique (id) initially deferred
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
if _, err := tx.Exec(context.Background(), "insert into foo(id) values (1)"); err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
if _, err := tx.Exec(context.Background(), "insert into foo(id) values (1)"); err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Commit(context.Background())
if pgErr, ok := err.(*pgconn.PgError); !ok || pgErr.Code != "23505" {
t.Fatalf("Expected unique constraint violation 23505, got %#v", err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 0 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxCommitSerializationFailure(t *testing.T) {
t.Parallel()
c1 := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, c1)
if c1.PgConn().ParameterStatus("crdb_version") != "" {
t.Skip("Skipping due to known server issue: (https://github.com/cockroachdb/cockroach/issues/60754)")
}
c2 := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, c2)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
c1.Exec(ctx, `drop table if exists tx_serializable_sums`)
_, err := c1.Exec(ctx, `create table tx_serializable_sums(num integer);`)
if err != nil {
t.Fatalf("Unable to create temporary table: %v", err)
}
defer c1.Exec(ctx, `drop table tx_serializable_sums`)
tx1, err := c1.BeginTx(ctx, pgx.TxOptions{IsoLevel: pgx.Serializable})
if err != nil {
t.Fatalf("Begin failed: %v", err)
}
defer tx1.Rollback(ctx)
tx2, err := c2.BeginTx(ctx, pgx.TxOptions{IsoLevel: pgx.Serializable})
if err != nil {
t.Fatalf("Begin failed: %v", err)
}
defer tx2.Rollback(ctx)
_, err = tx1.Exec(ctx, `insert into tx_serializable_sums(num) select sum(num)::int from tx_serializable_sums`)
if err != nil {
t.Fatalf("Exec failed: %v", err)
}
_, err = tx2.Exec(ctx, `insert into tx_serializable_sums(num) select sum(num)::int from tx_serializable_sums`)
if err != nil {
t.Fatalf("Exec failed: %v", err)
}
err = tx1.Commit(ctx)
if err != nil {
t.Fatalf("Commit failed: %v", err)
}
err = tx2.Commit(ctx)
if pgErr, ok := err.(*pgconn.PgError); !ok || pgErr.Code != "40001" {
t.Fatalf("Expected serialization error 40001, got %#v", err)
}
ensureConnValid(t, c1)
ensureConnValid(t, c2)
}
func TestTransactionSuccessfulRollback(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
_, err = tx.Exec(context.Background(), "insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Rollback(context.Background())
if err != nil {
t.Fatalf("tx.Rollback failed: %v", err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 0 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTransactionRollbackFailsClosesConnection(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
ctx, cancel := context.WithCancel(context.Background())
tx, err := conn.Begin(ctx)
require.NoError(t, err)
cancel()
err = tx.Rollback(ctx)
require.Error(t, err)
require.True(t, conn.IsClosed())
}
func TestBeginIsoLevels(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
pgxtest.SkipCockroachDB(t, conn, "Server always uses SERIALIZABLE isolation (https://www.cockroachlabs.com/docs/stable/demo-serializable.html)")
isoLevels := []pgx.TxIsoLevel{pgx.Serializable, pgx.RepeatableRead, pgx.ReadCommitted, pgx.ReadUncommitted}
for _, iso := range isoLevels {
tx, err := conn.BeginTx(context.Background(), pgx.TxOptions{IsoLevel: iso})
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
var level pgx.TxIsoLevel
conn.QueryRow(context.Background(), "select current_setting('transaction_isolation')").Scan(&level)
if level != iso {
t.Errorf("Expected to be in isolation level %v but was %v", iso, level)
}
err = tx.Rollback(context.Background())
if err != nil {
t.Fatalf("tx.Rollback failed: %v", err)
}
}
}
func TestBeginFunc(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
_, err := conn.Exec(context.Background(), createSql)
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), conn, func(tx pgx.Tx) error {
_, err := tx.Exec(context.Background(), "insert into foo(id) values (1)")
require.NoError(t, err)
return nil
})
require.NoError(t, err)
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
require.NoError(t, err)
require.EqualValues(t, 1, n)
}
func TestBeginFuncRollbackOnError(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
_, err := conn.Exec(context.Background(), createSql)
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), conn, func(tx pgx.Tx) error {
_, err := tx.Exec(context.Background(), "insert into foo(id) values (1)")
require.NoError(t, err)
return errors.New("some error")
})
require.EqualError(t, err, "some error")
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
require.NoError(t, err)
require.EqualValues(t, 0, n)
}
func TestBeginReadOnly(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
tx, err := conn.BeginTx(context.Background(), pgx.TxOptions{AccessMode: pgx.ReadOnly})
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
defer tx.Rollback(context.Background())
_, err = conn.Exec(context.Background(), "create table foo(id serial primary key)")
if pgErr, ok := err.(*pgconn.PgError); !ok || pgErr.Code != "25006" {
t.Errorf("Expected error SQLSTATE 25006, but got %#v", err)
}
}
func TestTxNestedTransactionCommit(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatal(err)
}
_, err = tx.Exec(context.Background(), "insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
nestedTx, err := tx.Begin(context.Background())
if err != nil {
t.Fatal(err)
}
_, err = nestedTx.Exec(context.Background(), "insert into foo(id) values (2)")
if err != nil {
t.Fatalf("nestedTx.Exec failed: %v", err)
}
doubleNestedTx, err := nestedTx.Begin(context.Background())
if err != nil {
t.Fatal(err)
}
_, err = doubleNestedTx.Exec(context.Background(), "insert into foo(id) values (3)")
if err != nil {
t.Fatalf("doubleNestedTx.Exec failed: %v", err)
}
err = doubleNestedTx.Commit(context.Background())
if err != nil {
t.Fatalf("doubleNestedTx.Commit failed: %v", err)
}
err = nestedTx.Commit(context.Background())
if err != nil {
t.Fatalf("nestedTx.Commit failed: %v", err)
}
err = tx.Commit(context.Background())
if err != nil {
t.Fatalf("tx.Commit failed: %v", err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 3 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxNestedTransactionRollback(t *testing.T) {
t.Parallel()
conn := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
if _, err := conn.Exec(context.Background(), createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin(context.Background())
if err != nil {
t.Fatal(err)
}
_, err = tx.Exec(context.Background(), "insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
nestedTx, err := tx.Begin(context.Background())
if err != nil {
t.Fatal(err)
}
_, err = nestedTx.Exec(context.Background(), "insert into foo(id) values (2)")
if err != nil {
t.Fatalf("nestedTx.Exec failed: %v", err)
}
err = nestedTx.Rollback(context.Background())
if err != nil {
t.Fatalf("nestedTx.Rollback failed: %v", err)
}
_, err = tx.Exec(context.Background(), "insert into foo(id) values (3)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Commit(context.Background())
if err != nil {
t.Fatalf("tx.Commit failed: %v", err)
}
var n int64
err = conn.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 2 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxBeginFuncNestedTransactionCommit(t *testing.T) {
t.Parallel()
db := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, db)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
_, err := db.Exec(context.Background(), createSql)
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), db, func(db pgx.Tx) error {
_, err := db.Exec(context.Background(), "insert into foo(id) values (1)")
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), db, func(db pgx.Tx) error {
_, err := db.Exec(context.Background(), "insert into foo(id) values (2)")
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), db, func(db pgx.Tx) error {
_, err := db.Exec(context.Background(), "insert into foo(id) values (3)")
require.NoError(t, err)
return nil
})
return nil
})
require.NoError(t, err)
return nil
})
require.NoError(t, err)
var n int64
err = db.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
require.NoError(t, err)
require.EqualValues(t, 3, n)
}
func TestTxBeginFuncNestedTransactionRollback(t *testing.T) {
t.Parallel()
db := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, db)
createSql := `
create temporary table foo(
id integer,
unique (id)
);
`
_, err := db.Exec(context.Background(), createSql)
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), db, func(db pgx.Tx) error {
_, err := db.Exec(context.Background(), "insert into foo(id) values (1)")
require.NoError(t, err)
err = pgx.BeginFunc(context.Background(), db, func(db pgx.Tx) error {
_, err := db.Exec(context.Background(), "insert into foo(id) values (2)")
require.NoError(t, err)
return errors.New("do a rollback")
})
require.EqualError(t, err, "do a rollback")
_, err = db.Exec(context.Background(), "insert into foo(id) values (3)")
require.NoError(t, err)
return nil
})
var n int64
err = db.QueryRow(context.Background(), "select count(*) from foo").Scan(&n)
require.NoError(t, err)
require.EqualValues(t, 2, n)
}
func TestTxSendBatchClosed(t *testing.T) {
t.Parallel()
db := mustConnectString(t, os.Getenv("PGX_TEST_DATABASE"))
defer closeConn(t, db)
tx, err := db.Begin(context.Background())
require.NoError(t, err)
defer tx.Rollback(context.Background())
err = tx.Commit(context.Background())
require.NoError(t, err)
batch := &pgx.Batch{}
batch.Queue("select 1")
batch.Queue("select 2")
batch.Queue("select 3")
br := tx.SendBatch(context.Background(), batch)
defer br.Close()
var n int
_, err = br.Exec()
require.Error(t, err)
err = br.QueryRow().Scan(&n)
require.Error(t, err)
_, err = br.Query()
require.Error(t, err)
}