diff --git a/orm/struct_filter.go b/orm/struct_filter.go
deleted file mode 100644
index 8ab4f55b..00000000
--- a/orm/struct_filter.go
+++ /dev/null
@@ -1,124 +0,0 @@
-package orm
-
-import (
-	"reflect"
-	"sync"
-
-	"github.com/go-pg/pg/v10/types"
-	"github.com/go-pg/urlstruct"
-)
-
-var ops = [...]string{
-	urlstruct.OpEq:    " = ",
-	urlstruct.OpNotEq: " != ",
-	urlstruct.OpLT:    " < ",
-	urlstruct.OpLTE:   " <= ",
-	urlstruct.OpGT:    " > ",
-	urlstruct.OpGTE:   " >= ",
-	urlstruct.OpIEq:   " ILIKE ",
-	urlstruct.OpMatch: " SIMILAR TO ",
-}
-
-var sliceOps = [...]string{
-	urlstruct.OpEq:    " = ANY",
-	urlstruct.OpNotEq: " != ALL",
-}
-
-func getOp(ops []string, op urlstruct.OpCode) string {
-	if int(op) < len(ops) {
-		return ops[op]
-	}
-	return ""
-}
-
-type structFilter struct {
-	value reflect.Value // reflect.Struct
-
-	infoOnce sync.Once
-	info     *urlstruct.StructInfo // lazy
-}
-
-var _ queryWithSepAppender = (*structFilter)(nil)
-
-func newStructFilter(v interface{}) *structFilter {
-	if v, ok := v.(*structFilter); ok {
-		return v
-	}
-	return &structFilter{
-		value: reflect.Indirect(reflect.ValueOf(v)),
-	}
-}
-
-func (sf *structFilter) AppendSep(b []byte) []byte {
-	return append(b, " AND "...)
-}
-
-func (sf *structFilter) AppendQuery(fmter QueryFormatter, b []byte) ([]byte, error) {
-	sf.infoOnce.Do(func() {
-		sf.info = urlstruct.DescribeStruct(sf.value.Type())
-	})
-
-	isPlaceholder := isPlaceholderFormatter(fmter)
-	startLen := len(b)
-
-	prevLen := len(b)
-	for _, f := range sf.info.Fields {
-		fv := f.Value(sf.value)
-		if f.Omit(fv) {
-			continue
-		}
-
-		isSlice := f.Type.Kind() == reflect.Slice
-
-		var op string
-		if isSlice {
-			op = getOp(sliceOps[:], f.Op)
-		} else {
-			op = getOp(ops[:], f.Op)
-		}
-		if op == "" {
-			continue
-		}
-
-		var appendValue types.AppenderFunc
-		if isSlice {
-			appendValue = types.ArrayAppender(f.Type)
-		} else {
-			appendValue = types.Appender(f.Type)
-		}
-		if appendValue == nil {
-			continue
-		}
-
-		if len(b) != prevLen {
-			b = append(b, " AND "...)
-			prevLen = len(b)
-		}
-
-		if sf.info.TableName != "" {
-			b = types.AppendIdent(b, sf.info.TableName, 1)
-			b = append(b, '.')
-		}
-		b = append(b, '"')
-		b = append(b, f.Column...)
-		b = append(b, '"')
-		b = append(b, op...)
-		if isSlice {
-			b = append(b, '(')
-		}
-		if isPlaceholder {
-			b = append(b, '?')
-		} else {
-			b = appendValue(b, fv, 1)
-		}
-		if isSlice {
-			b = append(b, ')')
-		}
-	}
-
-	if len(b) == startLen {
-		b = append(b, "TRUE"...)
-	}
-
-	return b, nil
-}
diff --git a/orm/struct_filter_test.go b/orm/struct_filter_test.go
deleted file mode 100644
index 3454a514..00000000
--- a/orm/struct_filter_test.go
+++ /dev/null
@@ -1,64 +0,0 @@
-package orm
-
-import (
-	"time"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-)
-
-type embeddedFilter struct {
-	Field      string
-	FieldNEQ   string
-	FieldLT    int8
-	FieldLTE   int16
-	FieldGT    int32
-	FieldGTE   int64
-	FieldIEQ   string
-	FieldMatch string
-}
-
-type Filter struct {
-	embeddedFilter
-
-	Multi    []string
-	MultiNEQ []int
-
-	Time time.Time
-
-	Omit []byte `pg:"-"`
-}
-
-var _ = Describe("structFilter", func() {
-	It("omits empty fields", func() {
-		f := newStructFilter(&Filter{})
-
-		b, err := f.AppendQuery(defaultFmter, nil)
-		Expect(err).NotTo(HaveOccurred())
-		Expect(string(b)).To(Equal("TRUE"))
-	})
-
-	It("constructs WHERE clause with filled filter", func() {
-		f := newStructFilter(&Filter{
-			embeddedFilter: embeddedFilter{
-				Field:      "one",
-				FieldNEQ:   "two",
-				FieldLT:    1,
-				FieldLTE:   2,
-				FieldGT:    3,
-				FieldGTE:   4,
-				FieldIEQ:   "three",
-				FieldMatch: "four",
-			},
-
-			Multi:    []string{"one", "two"},
-			MultiNEQ: []int{3, 4},
-
-			Time: time.Unix(0, 0),
-		})
-
-		b, err := f.AppendQuery(defaultFmter, nil)
-		Expect(err).NotTo(HaveOccurred())
-		Expect(string(b)).To(Equal(`"field" = 'one' AND "field" != 'two' AND "field" < 1 AND "field" <= 2 AND "field" > 3 AND "field" >= 4 AND "field" ILIKE 'three' AND "field" SIMILAR TO 'four' AND "multi" = ANY('{"one","two"}') AND "multi" != ALL('{3,4}') AND "time" = '1970-01-01 00:00:00+00:00:00'`))
-	})
-})