diff --git a/entc/gen/internal/bindata.go b/entc/gen/internal/bindata.go
index 24135276b..48928df8e 100644
--- a/entc/gen/internal/bindata.go
+++ b/entc/gen/internal/bindata.go
@@ -732,7 +732,7 @@ func templateDialectSqlEntqlTmpl() (*asset, error) {
 	return a, nil
 }
 
-var _templateDialectSqlErrorsTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x94\x53\x4d\x6b\xe3\x48\x10\x3d\xab\x7f\xc5\x5b\xc3\x2c\x52\xd0\x4a\x99\x1c\x16\x36\x83\x0f\x43\xd6\x0b\x01\x6f\x18\xc7\xc9\x61\x19\x86\xd0\x91\x4a\x72\xe3\x76\xb7\x5d\xdd\x72\x62\x84\xfe\xfb\xd2\xfa\x30\x26\xcb\x1e\x46\x27\x75\xbd\xaa\x57\x5f\xaf\xda\x36\xbf\x12\x77\x76\x7f\x62\x55\x6f\x3c\x6e\xae\x3f\xff\xf1\xdb\x9e\xc9\x91\xf1\xf8\x4b\x16\xf4\x6a\xed\x16\xf7\xa6\xc8\xf0\x55\x6b\xf4\x4e\x0e\x01\xe7\x23\x95\x99\x78\xda\x28\x07\x67\x1b\x2e\x08\x85\x2d\x09\xca\x41\xab\x82\x8c\xa3\x12\x8d\x29\x89\xe1\x37\x84\xaf\x7b\x59\x6c\x08\x37\xd9\xf5\x84\xa2\xb2\x8d\x29\x85\x32\x3d\xbe\xbc\xbf\x5b\x3c\xac\x17\xa8\x94\x26\x8c\x36\xb6\xd6\xa3\x54\x4c\x85\xb7\x7c\x82\xad\xe0\x2f\x92\x79\x26\xca\xc4\x55\xde\x75\x42\x84\x1e\x50\x34\xce\xdb\x1d\x88\xd9\xb2\x83\x34\xe5\xf4\xbb\x91\xa6\xd4\xc4\x0e\x95\x65\xb8\x83\x46\xa9\xa4\xa6\xc2\x3b\xf4\xd1\x6d\x8b\x92\x2a\x65\x08\xb3\x11\xc8\xdd\x41\xe7\x43\xf0\x0c\x5d\x27\xaa\xc6\x14\x50\x6e\xbd\x5a\xde\x59\xe3\x3c\x4b\x65\xfc\x22\xc0\x31\x31\x0f\x59\x12\xc4\x57\x1f\xc0\x14\xaf\xd6\xea\x04\xad\x88\x8e\x92\x11\x8b\x28\xda\xb9\x1a\xf3\x10\x90\x0d\xe1\x89\x88\xa2\x3c\x1f\x18\x42\x75\x3b\xe9\xb1\x27\x9e\x0a\xcc\x44\x14\x8d\x3d\xcc\xf1\x3d\xcb\xb2\x1f\xce\xb3\x32\x75\x2b\xa2\x28\x9a\xf5\x14\xf8\x7c\xfd\xfb\xcd\x2c\x8d\xce\x5f\x9e\xe3\xef\xd3\x7a\xb5\xec\x81\x91\x39\x5e\x3c\xbe\xfc\xf9\xfc\xed\x65\xf1\xf0\xf4\xf8\x4f\x92\xf5\xd1\xcf\x0f\xf7\xab\xe7\x05\x8a\x73\xcd\xa8\xa4\xd2\x54\x9e\xb9\xf2\x1c\xeb\xd5\x52\x79\x1a\xfc\xcb\x66\xaf\x55\x21\x3d\x61\x4b\x27\x1c\xa5\x6e\x08\x47\x65\xb5\xf4\xe4\xd0\x18\x75\x68\xe8\x82\x6c\x96\x86\xf8\x6f\xd6\xf9\x9a\x69\xbd\x5a\x06\x8e\x4e\x44\x89\x88\x54\x85\x97\x14\x76\x8b\xdb\x61\x10\xf1\x95\x3b\xe8\x9a\xe5\x7e\x93\x7d\x98\x5f\xf2\x25\xb8\x85\x5e\x99\x7c\xc3\x06\xbf\x7e\x70\x68\x77\xae\x4e\x03\x49\x97\xc2\x73\x43\x22\xa4\x08\x3b\x56\x81\x9c\xa5\xa9\x69\x92\x40\x60\x51\x15\x86\xf1\xb9\x90\xc9\x4b\x65\x5c\x3c\x31\x58\x76\xdf\xd5\x8f\x7e\x57\x3f\x91\x2e\xe4\xeb\xc4\xe4\x6f\x94\x4e\x51\x49\xed\x48\x74\x42\xe4\x39\xd8\x6a\xfd\x2a\x8b\x2d\x0a\xa9\xb5\x83\x7f\xcf\x1e\x27\x4b\x50\xe7\x1b\xcb\xbd\xeb\x85\x5e\xab\x23\x99\x71\x57\x6f\xca\x6f\x46\xf5\x8f\xbe\x83\x5d\x55\x18\xaf\x32\x1b\xf4\x38\xe1\xb1\x7f\x3f\xeb\xe5\xe9\xbd\x2f\x70\x92\xe4\x10\xd9\xf6\x43\xe7\x60\xbf\x9d\x5f\x56\x11\x27\x5f\x06\xf3\x2f\xf3\x50\x7c\xdf\x7c\x78\xce\x51\xed\xfc\xa0\xd0\x2a\x9e\x7d\x7a\xbb\xc5\xa7\xe3\xac\x27\x4e\x7b\xff\xa4\xef\x5a\x55\x83\x65\x58\xe5\xff\x5d\xc7\x7f\x96\x48\xcc\x97\x43\x0b\xcf\xfe\x04\xc9\x94\xe1\xd4\xfe\x0d\x00\x00\xff\xff\x87\x44\x71\x29\x8e\x04\x00\x00")
+var _templateDialectSqlErrorsTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x74\x52\x5d\x6b\xdb\x30\x14\x7d\xae\x7e\xc5\x59\xa0\x23\x2e\x99\xdd\xf5\x6d\x2d\x7d\x28\x21\x83\x40\x19\x6c\xed\x1f\x70\xa4\xab\x58\x44\x95\xd2\x2b\x39\x49\x31\xfe\xef\x43\x52\x0c\xa1\x6c\x6f\xd6\x39\xe7\x7e\x9c\x73\x3d\x0c\xcd\x8d\x58\xfa\xfd\x07\x9b\x6d\x17\x71\x77\xfb\xfd\xc7\xb7\x3d\x53\x20\x17\xf1\xb3\x95\xb4\xf1\x7e\x87\xb5\x93\x35\x9e\xac\x45\x16\x05\x24\x9e\x0f\xa4\x6a\xf1\xda\x99\x80\xe0\x7b\x96\x04\xe9\x15\xc1\x04\x58\x23\xc9\x05\x52\xe8\x9d\x22\x46\xec\x08\x4f\xfb\x56\x76\x84\xbb\xfa\x76\x62\xa1\x7d\xef\x94\x30\x2e\xf3\xcf\xeb\xe5\xea\xd7\xcb\x0a\xda\x58\xc2\x19\x63\xef\x23\x94\x61\x92\xd1\xf3\x07\xbc\x46\xbc\x18\x16\x99\xa8\x16\x37\xcd\x38\x0a\x91\x3c\x40\xf6\x21\xfa\x37\x10\xb3\xe7\x80\xd6\xa9\xe9\xb3\x6b\x9d\xb2\xc4\x01\xda\x33\xc2\xbb\x85\x32\xad\x25\x19\x03\x72\xf5\x30\x40\x91\x36\x8e\x30\x3b\x13\x4d\x78\xb7\x4d\x29\x9e\x61\x1c\x85\xee\x9d\x84\x09\x2f\xbf\x9f\x97\xde\x85\xc8\xad\x71\x71\x95\xe8\x39\x31\x97\x29\x15\xe6\x37\x9f\xc8\x05\x36\xde\xdb\x0a\x83\xb8\x32\x3a\xcd\xdd\x72\xbb\xef\xea\x75\xf8\x47\x93\xac\xba\x62\x8a\x3d\x3b\x7c\xfd\x24\x18\x88\xb9\x2e\xd2\x6a\x91\xc6\x8d\x0b\x44\xee\x49\x5c\x8d\x62\xaa\x71\xc6\x2e\xa0\x5b\x1b\x48\x8c\x42\x34\x0d\xd8\x5b\xbb\x69\xe5\x0e\xb2\xb5\x36\x20\x9e\xea\x3f\x13\x92\xa2\x39\x72\xbb\x0f\x39\xe5\xad\x39\x90\x2b\x26\x70\x34\xb1\x3b\x47\x7f\xd6\x16\xdc\x68\x9c\x7f\x89\xba\x84\x31\xf1\xf3\x78\x9a\xd2\xac\x5f\x4f\x79\xb9\x29\x8f\x52\x59\xcc\x73\xc2\xef\x1f\x2f\xb7\x98\x57\x0f\x05\xfe\xf2\x98\x96\xcf\xfe\xd3\xf3\x11\xfa\x2d\x16\xb7\x7a\x3e\xbb\x3e\xde\xe3\xfa\x30\xcb\x8d\x17\x59\x5f\x65\xd7\x46\x17\xc4\xef\x52\xdb\xff\x9d\xa6\x7a\x48\x82\x8b\x64\x89\xf9\x32\xb4\xf4\xcc\xf7\x27\xa7\xd2\x9d\xff\x06\x00\x00\xff\xff\xb1\x83\xfa\x00\x0b\x03\x00\x00")
 
 func templateDialectSqlErrorsTmplBytes() ([]byte, error) {
 	return bindataRead(
@@ -747,7 +747,7 @@ func templateDialectSqlErrorsTmpl() (*asset, error) {
 		return nil, err
 	}
 
-	info := bindataFileInfo{name: "template/dialect/sql/errors.tmpl", size: 1166, mode: os.FileMode(420), modTime: time.Unix(1, 0)}
+	info := bindataFileInfo{name: "template/dialect/sql/errors.tmpl", size: 779, mode: os.FileMode(420), modTime: time.Unix(1, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }
diff --git a/entc/gen/template/dialect/sql/errors.tmpl b/entc/gen/template/dialect/sql/errors.tmpl
index 6e44250c4..b8f6c5f03 100644
--- a/entc/gen/template/dialect/sql/errors.tmpl
+++ b/entc/gen/template/dialect/sql/errors.tmpl
@@ -7,22 +7,8 @@ in the LICENSE file in the root directory of this source tree.
 {{/* custom errors and errors handlers for sql dialects */}}
 {{ define "dialect/sql/errors" }}
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",										// MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed",							// SQLite.
-			"duplicate key value violates unique constraint",	// PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/config/ent/ent.go b/entc/integration/config/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/config/ent/ent.go
+++ b/entc/integration/config/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/customid/ent/ent.go b/entc/integration/customid/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/customid/ent/ent.go
+++ b/entc/integration/customid/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/edgefield/ent/ent.go b/entc/integration/edgefield/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/edgefield/ent/ent.go
+++ b/entc/integration/edgefield/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/ent/ent.go b/entc/integration/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/ent/ent.go
+++ b/entc/integration/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/hooks/ent/ent.go b/entc/integration/hooks/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/hooks/ent/ent.go
+++ b/entc/integration/hooks/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/idtype/ent/ent.go b/entc/integration/idtype/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/idtype/ent/ent.go
+++ b/entc/integration/idtype/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/integration_test.go b/entc/integration/integration_test.go
index 304003236..b3dc1936a 100644
--- a/entc/integration/integration_test.go
+++ b/entc/integration/integration_test.go
@@ -1355,15 +1355,16 @@ func CreateBulk(t *testing.T, client *ent.Client) {
 }
 
 func ConstraintChecks(t *testing.T, client *ent.Client) {
+	var cerr *ent.ConstraintError
 	_, err := client.Pet.Create().SetName("orphan").SetOwnerID(0).Save(context.Background())
-	require.True(t, sqlgraph.IsConstraintError(err))
+	require.True(t, errors.As(err, &cerr))
 	require.True(t, sqlgraph.IsForeignKeyConstraintError(err))
 	require.False(t, sqlgraph.IsUniqueConstraintError(err))
 
 	client.FileType.Create().SetName("a unique name").SaveX(context.Background())
 	_, err = client.FileType.Create().SetName("a unique name").Save(context.Background())
 	t.Logf("err %T %+v", err, err)
-	require.True(t, sqlgraph.IsConstraintError(err))
+	require.True(t, errors.As(err, &cerr))
 	require.False(t, sqlgraph.IsForeignKeyConstraintError(err))
 	require.True(t, sqlgraph.IsUniqueConstraintError(err))
 }
diff --git a/entc/integration/json/ent/ent.go b/entc/integration/json/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/json/ent/ent.go
+++ b/entc/integration/json/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/migrate/entv1/ent.go b/entc/integration/migrate/entv1/ent.go
index 35d295765..114f78381 100644
--- a/entc/integration/migrate/entv1/ent.go
+++ b/entc/integration/migrate/entv1/ent.go
@@ -9,7 +9,6 @@ package entv1
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/migrate/entv2/ent.go b/entc/integration/migrate/entv2/ent.go
index f11e88e60..b802e2d89 100644
--- a/entc/integration/migrate/entv2/ent.go
+++ b/entc/integration/migrate/entv2/ent.go
@@ -9,7 +9,6 @@ package entv2
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/multischema/ent/ent.go b/entc/integration/multischema/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/multischema/ent/ent.go
+++ b/entc/integration/multischema/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/privacy/ent/ent.go b/entc/integration/privacy/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/privacy/ent/ent.go
+++ b/entc/integration/privacy/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/entc/integration/template/ent/ent.go b/entc/integration/template/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/entc/integration/template/ent/ent.go
+++ b/entc/integration/template/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/edgeindex/ent/ent.go b/examples/edgeindex/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/edgeindex/ent/ent.go
+++ b/examples/edgeindex/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/entcpkg/ent/ent.go b/examples/entcpkg/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/entcpkg/ent/ent.go
+++ b/examples/entcpkg/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/m2m2types/ent/ent.go b/examples/m2m2types/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/m2m2types/ent/ent.go
+++ b/examples/m2m2types/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/m2mbidi/ent/ent.go b/examples/m2mbidi/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/m2mbidi/ent/ent.go
+++ b/examples/m2mbidi/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/m2mrecur/ent/ent.go b/examples/m2mrecur/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/m2mrecur/ent/ent.go
+++ b/examples/m2mrecur/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/o2m2types/ent/ent.go b/examples/o2m2types/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/o2m2types/ent/ent.go
+++ b/examples/o2m2types/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/o2mrecur/ent/ent.go b/examples/o2mrecur/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/o2mrecur/ent/ent.go
+++ b/examples/o2mrecur/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/o2o2types/ent/ent.go b/examples/o2o2types/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/o2o2types/ent/ent.go
+++ b/examples/o2o2types/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/o2obidi/ent/ent.go b/examples/o2obidi/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/o2obidi/ent/ent.go
+++ b/examples/o2obidi/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/o2orecur/ent/ent.go b/examples/o2orecur/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/o2orecur/ent/ent.go
+++ b/examples/o2orecur/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/privacyadmin/ent/ent.go b/examples/privacyadmin/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/privacyadmin/ent/ent.go
+++ b/examples/privacyadmin/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/privacytenant/ent/ent.go b/examples/privacytenant/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/privacytenant/ent/ent.go
+++ b/examples/privacytenant/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/start/ent/ent.go b/examples/start/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/start/ent/ent.go
+++ b/examples/start/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }
diff --git a/examples/traversal/ent/ent.go b/examples/traversal/ent/ent.go
index 4063a8a00..28dee448a 100644
--- a/examples/traversal/ent/ent.go
+++ b/examples/traversal/ent/ent.go
@@ -9,7 +9,6 @@ package ent
 import (
 	"errors"
 	"fmt"
-	"strings"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
@@ -242,22 +241,8 @@ func IsConstraintError(err error) bool {
 }
 
 func isSQLConstraintError(err error) (*ConstraintError, bool) {
-	var (
-		msg = err.Error()
-		// error format per dialect.
-		errors = [...]string{
-			"Error 1062",               // MySQL 1062 error (ER_DUP_ENTRY).
-			"UNIQUE constraint failed", // SQLite.
-			"duplicate key value violates unique constraint", // PostgreSQL.
-		}
-	)
-	if _, ok := err.(*sqlgraph.ConstraintError); ok {
-		return &ConstraintError{msg, err}, true
-	}
-	for i := range errors {
-		if strings.Contains(msg, errors[i]) {
-			return &ConstraintError{msg, err}, true
-		}
+	if sqlgraph.IsConstraintError(err) {
+		return &ConstraintError{err.Error(), err}, true
 	}
 	return nil, false
 }