Jay
273278d322
1. add cron module 2. add pool module 3. add tcgplayer background job 4. add card price model
94 lines
2.4 KiB
Go
94 lines
2.4 KiB
Go
package pq
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import (
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"math"
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"reflect"
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"time"
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"github.com/lib/pq/oid"
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)
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const headerSize = 4
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type fieldDesc struct {
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// The object ID of the data type.
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OID oid.Oid
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// The data type size (see pg_type.typlen).
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// Note that negative values denote variable-width types.
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Len int
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// The type modifier (see pg_attribute.atttypmod).
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// The meaning of the modifier is type-specific.
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Mod int
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}
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func (fd fieldDesc) Type() reflect.Type {
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switch fd.OID {
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case oid.T_int8:
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return reflect.TypeOf(int64(0))
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case oid.T_int4:
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return reflect.TypeOf(int32(0))
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case oid.T_int2:
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return reflect.TypeOf(int16(0))
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case oid.T_varchar, oid.T_text:
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return reflect.TypeOf("")
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case oid.T_bool:
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return reflect.TypeOf(false)
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case oid.T_date, oid.T_time, oid.T_timetz, oid.T_timestamp, oid.T_timestamptz:
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return reflect.TypeOf(time.Time{})
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case oid.T_bytea:
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return reflect.TypeOf([]byte(nil))
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default:
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return reflect.TypeOf(new(interface{})).Elem()
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}
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}
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func (fd fieldDesc) Name() string {
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return oid.TypeName[fd.OID]
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}
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func (fd fieldDesc) Length() (length int64, ok bool) {
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switch fd.OID {
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case oid.T_text, oid.T_bytea:
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return math.MaxInt64, true
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case oid.T_varchar, oid.T_bpchar:
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return int64(fd.Mod - headerSize), true
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default:
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return 0, false
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}
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}
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func (fd fieldDesc) PrecisionScale() (precision, scale int64, ok bool) {
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switch fd.OID {
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case oid.T_numeric, oid.T__numeric:
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mod := fd.Mod - headerSize
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precision = int64((mod >> 16) & 0xffff)
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scale = int64(mod & 0xffff)
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return precision, scale, true
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default:
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return 0, 0, false
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}
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}
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// ColumnTypeScanType returns the value type that can be used to scan types into.
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func (rs *rows) ColumnTypeScanType(index int) reflect.Type {
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return rs.colTyps[index].Type()
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}
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// ColumnTypeDatabaseTypeName return the database system type name.
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func (rs *rows) ColumnTypeDatabaseTypeName(index int) string {
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return rs.colTyps[index].Name()
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}
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// ColumnTypeLength returns the length of the column type if the column is a
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// variable length type. If the column is not a variable length type ok
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// should return false.
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func (rs *rows) ColumnTypeLength(index int) (length int64, ok bool) {
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return rs.colTyps[index].Length()
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}
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// ColumnTypePrecisionScale should return the precision and scale for decimal
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// types. If not applicable, ok should be false.
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func (rs *rows) ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool) {
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return rs.colTyps[index].PrecisionScale()
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}
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