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// Copyright 2017 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//go:build sql
// +build sql
package apd
import (
"database/sql"
"flag"
"testing"
_ "github.com/lib/pq"
)
var (
flagPostgres = flag.String("postgres", "postgres://postgres@localhost/apd?sslmode=disable", "Postgres connection string to an empty database")
)
// TestSQL tests the Scan and Value methods of Decimal.
func TestSQL(t *testing.T) {
db, err := sql.Open("postgres", *flagPostgres)
if err != nil {
t.Fatal(err)
}
var a Decimal
if _, _, err = a.SetString("1234.567e5"); err != nil {
t.Fatal(err)
}
if _, err := db.Exec("drop table if exists d"); err != nil {
t.Fatal(err)
}
if _, err := db.Exec("create table d (v decimal)"); err != nil {
t.Fatal(err)
}
if _, err := db.Exec("insert into d values ($1)", a); err != nil {
t.Fatal(err)
}
if _, err := db.Exec("update d set v = v + 1e5"); err != nil {
t.Fatal(err)
}
var b, c, d Decimal
var nd NullDecimal
if err := db.QueryRow("select v, v::text, v::int, v::float, v from d").Scan(&a, &b, &c, &d, &nd); err != nil {
t.Fatal(err)
}
want, _, err := NewFromString("123556700")
if err != nil {
t.Fatal(err)
}
for i, v := range []*Decimal{&a, &b, &c, &d, &nd.Decimal} {
if v.Cmp(want) != 0 {
t.Fatalf("%d: unexpected: %s, want: %s", i, v.String(), want.String())
}
}
if _, err := db.Exec("update d set v = NULL"); err != nil {
t.Fatal(err)
}
if err := db.QueryRow("select v from d").Scan(&nd); err != nil {
t.Fatal(err)
}
if nd.Valid {
t.Fatal("expected null")
}
var g Decimal
if err := db.QueryRow("select 0::decimal(19,9)").Scan(&g); err != nil {
t.Fatal(err)
}
zeroD, _, err := NewFromString("0.000000000")
if err != nil {
t.Fatal(err)
}
if g.String() != zeroD.String() {
t.Fatalf("expected 0::decimal(19.9) pg value %s match, found %s", g.String(), zeroD.String())
}
}
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