diff --git a/database/gdb/gdb.go b/database/gdb/gdb.go
index 3f3e14e38..c8fe0657d 100644
--- a/database/gdb/gdb.go
+++ b/database/gdb/gdb.go
@@ -202,8 +202,10 @@ const (
 var (
 	// ErrNoRows is alias of sql.ErrNoRows.
 	ErrNoRows = sql.ErrNoRows
+
 	// instances is the management map for instances.
 	instances = gmap.NewStrAnyMap(true)
+
 	// driverMap manages all custom registered driver.
 	driverMap = map[string]Driver{
 		"mysql":  &DriverMysql{},
@@ -212,6 +214,14 @@ var (
 		"oracle": &DriverOracle{},
 		"sqlite": &DriverSqlite{},
 	}
+
+	// lastOperatorRegPattern is the regular expression pattern for a string
+	// which has operator at its tail.
+	lastOperatorRegPattern = `[<>=]+\s*$`
+
+	// regularFieldNameRegPattern is the regular expression pattern for a string
+	// which is a regular field name of table.
+	regularFieldNameRegPattern = `^[\w\.\-]+$`
 )
 
 // Register registers custom database driver to gdb.
diff --git a/database/gdb/gdb_core.go b/database/gdb/gdb_core.go
index ecdf9a3f7..2fe885a8a 100644
--- a/database/gdb/gdb_core.go
+++ b/database/gdb/gdb_core.go
@@ -13,7 +13,6 @@ import (
 	"fmt"
 	"github.com/gogf/gf/internal/utils"
 	"reflect"
-	"regexp"
 	"strings"
 
 	"github.com/gogf/gf/container/gvar"
@@ -26,12 +25,6 @@ const (
 	gPATH_FILTER_KEY = "/database/gdb/gdb"
 )
 
-var (
-	// lastOperatorReg is the regular expression object for a string
-	// which has operator at its tail.
-	lastOperatorReg = regexp.MustCompile(`[<>=]+\s*$`)
-)
-
 // Master creates and returns a connection from master node if master-slave configured.
 // It returns the default connection if master-slave not configured.
 func (c *Core) Master() (*sql.DB, error) {
diff --git a/database/gdb/gdb_func.go b/database/gdb/gdb_func.go
index 5b35fd25c..032ab1b5c 100644
--- a/database/gdb/gdb_func.go
+++ b/database/gdb/gdb_func.go
@@ -257,9 +257,11 @@ func formatSql(sql string, args []interface{}) (newQuery string, newArgs []inter
 // formatWhere formats where statement and its arguments.
 // TODO []interface{} type support for parameter <where> does not completed yet.
 func formatWhere(db DB, where interface{}, args []interface{}, omitEmpty bool) (newWhere string, newArgs []interface{}) {
-	buffer := bytes.NewBuffer(nil)
-	rv := reflect.ValueOf(where)
-	kind := rv.Kind()
+	var (
+		buffer = bytes.NewBuffer(nil)
+		rv     = reflect.ValueOf(where)
+		kind   = rv.Kind()
+	)
 	if kind == reflect.Ptr {
 		rv = rv.Elem()
 		kind = rv.Kind()
@@ -270,7 +272,7 @@ func formatWhere(db DB, where interface{}, args []interface{}, omitEmpty bool) (
 
 	case reflect.Map:
 		for key, value := range DataToMapDeep(where) {
-			if omitEmpty && empty.IsEmpty(value) {
+			if gregex.IsMatchString(regularFieldNameRegPattern, key) && omitEmpty && empty.IsEmpty(value) {
 				continue
 			}
 			newArgs = formatWhereKeyValue(db, buffer, newArgs, key, value)
@@ -283,10 +285,11 @@ func formatWhere(db DB, where interface{}, args []interface{}, omitEmpty bool) (
 		// which implement apiIterator interface and are index-friendly for where conditions.
 		if iterator, ok := where.(apiIterator); ok {
 			iterator.Iterator(func(key, value interface{}) bool {
-				if omitEmpty && empty.IsEmpty(value) {
+				ketStr := gconv.String(key)
+				if gregex.IsMatchString(regularFieldNameRegPattern, ketStr) && omitEmpty && empty.IsEmpty(value) {
 					return true
 				}
-				newArgs = formatWhereKeyValue(db, buffer, newArgs, gconv.String(key), value)
+				newArgs = formatWhereKeyValue(db, buffer, newArgs, ketStr, value)
 				return true
 			})
 			break
@@ -309,10 +312,10 @@ func formatWhere(db DB, where interface{}, args []interface{}, omitEmpty bool) (
 	newWhere = buffer.String()
 	if len(newArgs) > 0 {
 		if gstr.Pos(newWhere, "?") == -1 {
-			if lastOperatorReg.MatchString(newWhere) {
+			if gregex.IsMatchString(lastOperatorRegPattern, newWhere) {
 				// Eg: Where/And/Or("uid>=", 1)
 				newWhere += "?"
-			} else if gregex.IsMatchString(`^[\w\.\-]+$`, newWhere) {
+			} else if gregex.IsMatchString(regularFieldNameRegPattern, newWhere) {
 				newWhere = db.QuoteString(newWhere)
 				if len(newArgs) > 0 {
 					if utils.IsArray(newArgs[0]) {
@@ -362,8 +365,10 @@ func formatWhereKeyValue(db DB, buffer *bytes.Buffer, newArgs []interface{}, key
 	// If the value is type of slice, and there's only one '?' holder in
 	// the key string, it automatically adds '?' holder chars according to its arguments count
 	// and converts it to "IN" statement.
-	rv := reflect.ValueOf(value)
-	kind := rv.Kind()
+	var (
+		rv   = reflect.ValueOf(value)
+		kind = rv.Kind()
+	)
 	switch kind {
 	case reflect.Slice, reflect.Array:
 		count := gstr.Count(quotedKey, "?")
@@ -379,7 +384,7 @@ func formatWhereKeyValue(db DB, buffer *bytes.Buffer, newArgs []interface{}, key
 		}
 	default:
 		if value == nil || empty.IsNil(rv) {
-			if gregex.IsMatchString(`^[\w\.\-]+$`, key) {
+			if gregex.IsMatchString(regularFieldNameRegPattern, key) {
 				// The key is a single field name.
 				buffer.WriteString(quotedKey + " IS NULL")
 			} else {
@@ -392,11 +397,24 @@ func formatWhereKeyValue(db DB, buffer *bytes.Buffer, newArgs []interface{}, key
 			if gstr.Pos(quotedKey, "?") == -1 {
 				like := " like"
 				if len(quotedKey) > len(like) && gstr.Equal(quotedKey[len(quotedKey)-len(like):], like) {
+					// Eg: Where(g.Map{"name like": "john%"})
 					buffer.WriteString(quotedKey + " ?")
-				} else if lastOperatorReg.MatchString(quotedKey) {
+				} else if gregex.IsMatchString(lastOperatorRegPattern, quotedKey) {
+					// Eg: Where(g.Map{"age > ": 16})
 					buffer.WriteString(quotedKey + " ?")
-				} else {
+				} else if gregex.IsMatchString(regularFieldNameRegPattern, key) {
+					// The key is a regular field name.
 					buffer.WriteString(quotedKey + "=?")
+				} else {
+					// The key is not a regular field name.
+					// Eg: Where(g.Map{"age > 16": nil})
+					// Issue: https://github.com/gogf/gf/issues/765
+					if empty.IsEmpty(value) {
+						buffer.WriteString(quotedKey)
+						break
+					} else {
+						buffer.WriteString(quotedKey + "=?")
+					}
 				}
 			} else {
 				buffer.WriteString(quotedKey)
diff --git a/database/gdb/gdb_z_mysql_model_test.go b/database/gdb/gdb_z_mysql_model_test.go
index dcaea9cb9..f95975d9e 100644
--- a/database/gdb/gdb_z_mysql_model_test.go
+++ b/database/gdb/gdb_z_mysql_model_test.go
@@ -1286,6 +1286,29 @@ func Test_Model_Where_ISNULL_2(t *testing.T) {
 	})
 }
 
+func Test_Model_Where_OmitEmpty(t *testing.T) {
+	table := createInitTable()
+	defer dropTable(table)
+	gtest.C(t, func(t *gtest.T) {
+		conditions := g.Map{
+			"id < 4": "",
+		}
+		result, err := db.Table(table).WherePri(conditions).Order("id asc").All()
+		t.Assert(err, nil)
+		t.Assert(len(result), 3)
+		t.Assert(result[0]["id"].Int(), 1)
+	})
+	gtest.C(t, func(t *gtest.T) {
+		conditions := g.Map{
+			"id < 4": "",
+		}
+		result, err := db.Table(table).WherePri(conditions).OmitEmpty().Order("id asc").All()
+		t.Assert(err, nil)
+		t.Assert(len(result), 3)
+		t.Assert(result[0]["id"].Int(), 1)
+	})
+}
+
 func Test_Model_Where_GTime(t *testing.T) {
 	table := createInitTable()
 	defer dropTable(table)
diff --git a/database/gdb/gdb_z_mysql_soft_time_test.go b/database/gdb/gdb_z_mysql_soft_time_test.go
index 4daef93a1..70f064b5f 100644
--- a/database/gdb/gdb_z_mysql_soft_time_test.go
+++ b/database/gdb/gdb_z_mysql_soft_time_test.go
@@ -163,7 +163,7 @@ CREATE TABLE %s (
 		gtest.Error(err)
 	}
 	defer dropTable(table)
-	db.SetDebug(true)
+	// db.SetDebug(true)
 	gtest.C(t, func(t *gtest.T) {
 		for i := 1; i <= 10; i++ {
 			data := g.Map{
diff --git a/go.mod b/go.mod
index bc4d3995c..1afa28a7d 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,9 @@ require (
 	github.com/gqcn/structs v1.1.1
 	github.com/grokify/html-strip-tags-go v0.0.0-20190921062105-daaa06bf1aaf
 	github.com/json-iterator/go v1.1.10
+	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/olekukonko/tablewriter v0.0.1
+	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae // indirect
 	golang.org/x/text v0.3.2
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
 )