Add improve mysql keyword completion

Author: lighttiger2505

dialect/keyword.go

@@ -380,14 +380,23 @@ type DatabaseDriver string
 
 const (
 	DatabaseDriverMySQL      DatabaseDriver = "mysql"
+	DatabaseDriverMySQL8     DatabaseDriver = "mysql8"
+	DatabaseDriverMySQL57    DatabaseDriver = "mysql57"
+	DatabaseDriverMySQL56    DatabaseDriver = "mysql56"
 	DatabaseDriverPostgreSQL DatabaseDriver = "postgresql"
 	DatabaseDriverSQLite3    DatabaseDriver = "sqlite3"
 )
 
 func DataBaseKeywords(driver DatabaseDriver) []string {
 	switch driver {
 	case DatabaseDriverMySQL:
+		return mysql8Keyword
+	case DatabaseDriverMySQL8:
+		return mysql8Keyword
+	case DatabaseDriverMySQL57:
 		return mysql57Keyword
+	case DatabaseDriverMySQL56:
+		return mysql56Keyword
 	case DatabaseDriverPostgreSQL:
 		return postgresql13Keywords
 	case DatabaseDriverSQLite3:
@@ -400,7 +409,13 @@ func DataBaseKeywords(driver DatabaseDriver) []string {
 func DataBaseFunctions(driver DatabaseDriver) []string {
 	switch driver {
 	case DatabaseDriverMySQL:
+		return mysql8Function
+	case DatabaseDriverMySQL8:
+		return mysql8Function
+	case DatabaseDriverMySQL57:
 		return mysql57function
+	case DatabaseDriverMySQL56:
+		return mysql56Function
 	case DatabaseDriverPostgreSQL:
 		return []string{}
 	case DatabaseDriverSQLite3: