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package schema
import (
"database/sql"
"strconv"
"time"
"github.com/uptrace/bun/dialect"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/internal/parser"
)
type Dialect interface {
Init(db *sql.DB)
Name() dialect.Name
Features() feature.Feature
Tables() *Tables
OnTable(table *Table)
IdentQuote() byte
AppendUint32(b []byte, n uint32) []byte
AppendUint64(b []byte, n uint64) []byte
AppendTime(b []byte, tm time.Time) []byte
AppendBytes(b []byte, bs []byte) []byte
AppendJSON(b, jsonb []byte) []byte
}
//------------------------------------------------------------------------------
type BaseDialect struct{}
func (BaseDialect) AppendUint32(b []byte, n uint32) []byte {
return strconv.AppendUint(b, uint64(n), 10)
}
func (BaseDialect) AppendUint64(b []byte, n uint64) []byte {
return strconv.AppendUint(b, n, 10)
}
func (BaseDialect) AppendTime(b []byte, tm time.Time) []byte {
b = append(b, '\'')
b = tm.UTC().AppendFormat(b, "2006-01-02 15:04:05.999999-07:00")
b = append(b, '\'')
return b
}
func (BaseDialect) AppendBytes(b, bs []byte) []byte {
return dialect.AppendBytes(b, bs)
}
func (BaseDialect) AppendJSON(b, jsonb []byte) []byte {
b = append(b, '\'')
p := parser.New(jsonb)
for p.Valid() {
c := p.Read()
switch c {
case '"':
b = append(b, '"')
case '\'':
b = append(b, "''"...)
case '\000':
continue
case '\\':
if p.SkipBytes([]byte("u0000")) {
b = append(b, `\\u0000`...)
} else {
b = append(b, '\\')
if p.Valid() {
b = append(b, p.Read())
}
}
default:
b = append(b, c)
}
}
b = append(b, '\'')
return b
}
//------------------------------------------------------------------------------
type nopDialect struct {
BaseDialect
tables *Tables
features feature.Feature
}
func newNopDialect() *nopDialect {
d := new(nopDialect)
d.tables = NewTables(d)
d.features = feature.Returning
return d
}
func (d *nopDialect) Init(*sql.DB) {}
func (d *nopDialect) Name() dialect.Name {
return dialect.Invalid
}
func (d *nopDialect) Features() feature.Feature {
return d.features
}
func (d *nopDialect) Tables() *Tables {
return d.tables
}
func (d *nopDialect) OnField(field *Field) {}
func (d *nopDialect) OnTable(table *Table) {}
func (d *nopDialect) IdentQuote() byte {
return '"'
}
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