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package pgdialect
import (
"database/sql"
"reflect"
"strconv"
"sync"
"time"
"github.com/uptrace/bun/dialect"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/dialect/sqltype"
"github.com/uptrace/bun/schema"
)
type Dialect struct {
tables *schema.Tables
features feature.Feature
appenderMap sync.Map
scannerMap sync.Map
}
func New() *Dialect {
d := new(Dialect)
d.tables = schema.NewTables(d)
d.features = feature.CTE |
feature.Returning |
feature.DefaultPlaceholder |
feature.DoubleColonCast |
feature.InsertTableAlias |
feature.DeleteTableAlias |
feature.TableCascade |
feature.TableIdentity |
feature.TableTruncate
return d
}
func (d *Dialect) Init(*sql.DB) {}
func (d *Dialect) Name() dialect.Name {
return dialect.PG
}
func (d *Dialect) Features() feature.Feature {
return d.features
}
func (d *Dialect) Tables() *schema.Tables {
return d.tables
}
func (d *Dialect) OnTable(table *schema.Table) {
for _, field := range table.FieldMap {
d.onField(field)
}
}
func (d *Dialect) onField(field *schema.Field) {
field.DiscoveredSQLType = fieldSQLType(field)
if field.AutoIncrement {
switch field.DiscoveredSQLType {
case sqltype.SmallInt:
field.CreateTableSQLType = pgTypeSmallSerial
case sqltype.Integer:
field.CreateTableSQLType = pgTypeSerial
case sqltype.BigInt:
field.CreateTableSQLType = pgTypeBigSerial
}
}
if field.Tag.HasOption("array") {
field.Append = arrayAppender(field.StructField.Type)
field.Scan = arrayScanner(field.StructField.Type)
}
}
func (d *Dialect) IdentQuote() byte {
return '"'
}
func (d *Dialect) Append(fmter schema.Formatter, b []byte, v interface{}) []byte {
switch v := v.(type) {
case nil:
return dialect.AppendNull(b)
case bool:
return dialect.AppendBool(b, v)
case int:
return strconv.AppendInt(b, int64(v), 10)
case int32:
return strconv.AppendInt(b, int64(v), 10)
case int64:
return strconv.AppendInt(b, v, 10)
case uint:
return strconv.AppendInt(b, int64(v), 10)
case uint32:
return strconv.AppendInt(b, int64(v), 10)
case uint64:
return strconv.AppendInt(b, int64(v), 10)
case float32:
return dialect.AppendFloat32(b, v)
case float64:
return dialect.AppendFloat64(b, v)
case string:
return dialect.AppendString(b, v)
case time.Time:
return dialect.AppendTime(b, v)
case []byte:
return dialect.AppendBytes(b, v)
case schema.QueryAppender:
return schema.AppendQueryAppender(fmter, b, v)
default:
vv := reflect.ValueOf(v)
if vv.Kind() == reflect.Ptr && vv.IsNil() {
return dialect.AppendNull(b)
}
appender := d.Appender(vv.Type())
return appender(fmter, b, vv)
}
}
func (d *Dialect) Appender(typ reflect.Type) schema.AppenderFunc {
if v, ok := d.appenderMap.Load(typ); ok {
return v.(schema.AppenderFunc)
}
fn := schema.Appender(typ, customAppender)
if v, ok := d.appenderMap.LoadOrStore(typ, fn); ok {
return v.(schema.AppenderFunc)
}
return fn
}
func (d *Dialect) FieldAppender(field *schema.Field) schema.AppenderFunc {
return schema.FieldAppender(d, field)
}
func (d *Dialect) Scanner(typ reflect.Type) schema.ScannerFunc {
if v, ok := d.scannerMap.Load(typ); ok {
return v.(schema.ScannerFunc)
}
fn := scanner(typ)
if v, ok := d.scannerMap.LoadOrStore(typ, fn); ok {
return v.(schema.ScannerFunc)
}
return fn
}
|
