func do() (err error) {
oDB := flag.String("db", "ql.db", "The DB file to open. It'll be created if missing")
oFlds := flag.Bool("fld", false, "Show recordset's field names.")
flag.Parse()
var src string
switch n := flag.NArg(); n {
case 0:
b, err := ioutil.ReadAll(bufio.NewReader(os.Stdin))
if err != nil {
return err
}
src = string(b)
default:
a := make([]string, n)
for i := range a {
a[i] = flag.Arg(i)
}
src = strings.Join(a, " ")
}
db, err := ql.OpenFile(*oDB, &ql.Options{CanCreate: true})
if err != nil {
return err
}
defer func() {
ec := db.Close()
switch {
case ec != nil && err != nil:
log.Println(ec)
case ec != nil:
err = ec
}
}()
src = "BEGIN TRANSACTION; " + src + "; COMMIT;"
l, err := ql.Compile(src)
if err != nil {
log.Println(src)
return err
}
rs, i, err := db.Execute(ql.NewRWCtx(), l)
if err != nil {
a := strings.Split(strings.TrimSpace(fmt.Sprint(l)), "\n")
return fmt.Errorf("%v: %s", err, a[i])
}
if len(rs) == 0 {
return
}
return rs[len(rs)-1].Do(*oFlds, func(data []interface{}) (bool, error) {
fmt.Println(str(data))
return true, nil
})
}
// qlCompile provides a wrapper to create safe, transaction-encased queries
func qlCompile(key string, wraptx bool) (list ql.List, err error) {
var src string
if l, ok := qlc[key]; !ok {
if src, ok = qlq[key]; !ok {
src = key
}
if wraptx {
src = "BEGIN TRANSACTION; " + src + "; COMMIT;"
}
if l, e := ql.Compile(src); err != nil {
err = e
} else {
list = l
}
} else {
list = l
}
return
}
func (i *Installer) dbInsertItem(tableName string, item interface{}, typeMap map[string]interface{}) error {
i.dbMtx.Lock()
defer i.dbMtx.Unlock()
fields, err := i.dbMarshalItem(tableName, item, typeMap)
if err != nil {
return err
}
vStr := make([]string, 0, len(fields))
for idx := range fields {
vStr = append(vStr, fmt.Sprintf("$%d", idx+1))
}
list, err := ql.Compile(fmt.Sprintf(`
INSERT INTO %s VALUES(%s);
`, tableName, strings.Join(vStr, ", ")))
if err != nil {
return err
}
return i.txExec(list.String(), fields...)
}
func do() (err error) {
oDB := flag.String("db", "ql.db", "The DB file to open. It'll be created if missing.")
oFlds := flag.Bool("fld", false, "Show recordset's field names.")
oSchema := flag.String("schema", "", "If non empty, show the CREATE statements of matching tables and exit.")
oTables := flag.String("tables", "", "If non empty, list matching table names and exit.")
flag.Parse()
db, err := ql.OpenFile(*oDB, &ql.Options{CanCreate: true})
if err != nil {
return err
}
defer func() {
ec := db.Close()
switch {
case ec != nil && err != nil:
log.Println(ec)
case ec != nil:
err = ec
}
}()
if pat := *oSchema; pat != "" {
re, err := regexp.Compile(pat)
if err != nil {
return err
}
nfo, err := db.Info()
if err != nil {
return err
}
r := []string{}
for _, ti := range nfo.Tables {
if !re.MatchString(ti.Name) {
continue
}
a := []string{}
for _, ci := range ti.Columns {
a = append(a, fmt.Sprintf("%s %s", ci.Name, ci.Type))
}
r = append(r, fmt.Sprintf("CREATE TABLE %s (%s);", ti.Name, strings.Join(a, ", ")))
}
sort.Strings(r)
if len(r) != 0 {
fmt.Println(strings.Join(r, "\n"))
}
return nil
}
if pat := *oTables; pat != "" {
re, err := regexp.Compile(pat)
if err != nil {
return err
}
nfo, err := db.Info()
if err != nil {
return err
}
r := []string{}
for _, ti := range nfo.Tables {
if !re.MatchString(ti.Name) {
continue
}
r = append(r, ti.Name)
}
sort.Strings(r)
if len(r) != 0 {
fmt.Println(strings.Join(r, "\n"))
}
return nil
}
var src string
switch n := flag.NArg(); n {
case 0:
b, err := ioutil.ReadAll(bufio.NewReader(os.Stdin))
if err != nil {
return err
}
src = string(b)
default:
a := make([]string, n)
for i := range a {
a[i] = flag.Arg(i)
}
src = strings.Join(a, " ")
}
src = "BEGIN TRANSACTION; " + src + "; COMMIT;"
l, err := ql.Compile(src)
if err != nil {
log.Println(src)
return err
}
rs, i, err := db.Execute(ql.NewRWCtx(), l)
if err != nil {
a := strings.Split(strings.TrimSpace(fmt.Sprint(l)), "\n")
return fmt.Errorf("%v: %s", err, a[i])
}
if len(rs) == 0 {
return
}
return rs[len(rs)-1].Do(*oFlds, func(data []interface{}) (bool, error) {
fmt.Println(str(data))
return true, nil
})
}
if l, e := ql.Compile(src); err != nil {
err = e
} else {
list = l
}
qlc[key] = list
} else {
list = l
}
return
}
// Pre-compiled begin transaction, commit and rollback statements
var (
qlBeginTransaction, _ = ql.Compile("BEGIN TRANSACTION;")
qlCommit, _ = ql.Compile("COMMIT;")
qlRollback, _ = ql.Compile("ROLLBACK;")
)
// qltx contains a ql context and database connection
type qltx struct {
ctx *ql.TCtx
db *qlw
}
// Execute allows for execution via ql context in a transaction
func (t *qltx) Execute(list ql.List, arg ...interface{}) ([]ql.Recordset, int, error) {
return t.db.Execute(t.ctx, list, arg...)
}