remove unused

expression/function_traits.go

@@ -50,76 +50,9 @@ var unFoldableFunctions = map[string]struct{}{
 	ast.SetVar:    {},
 	ast.GetVar:    {},
 	ast.GetParam:  {},
-	ast.Benchmark: {},
 	ast.DayName:   {},
 }
 
-// DisableFoldFunctions stores functions which prevent child scope functions from being constant folded.
-// Typically, these functions shall also exist in unFoldableFunctions, to stop from being folded when they themselves
-// are in child scope of an outer function, and the outer function is recursively folding its children.
-var DisableFoldFunctions = map[string]struct{}{
-	ast.Benchmark: {},
-}
-
-// IllegalFunctions4GeneratedColumns stores functions that is illegal for generated columns.
-// See https://github.com/mysql/mysql-server/blob/5.7/mysql-test/suite/gcol/inc/gcol_blocked_sql_funcs_main.inc for details
-var IllegalFunctions4GeneratedColumns = map[string]struct{}{
-	ast.ConnectionID:     {},
-	ast.LoadFile:         {},
-	ast.LastInsertId:     {},
-	ast.Rand:             {},
-	ast.UUID:             {},
-	ast.UUIDShort:        {},
-	ast.Curdate:          {},
-	ast.CurrentDate:      {},
-	ast.Curtime:          {},
-	ast.CurrentTime:      {},
-	ast.CurrentTimestamp: {},
-	ast.LocalTime:        {},
-	ast.LocalTimestamp:   {},
-	ast.Now:              {},
-	ast.UnixTimestamp:    {},
-	ast.UTCDate:          {},
-	ast.UTCTime:          {},
-	ast.UTCTimestamp:     {},
-	ast.Benchmark:        {},
-	ast.CurrentUser:      {},
-	ast.Database:         {},
-	ast.FoundRows:        {},
-	ast.GetLock:          {},
-	ast.IsFreeLock:       {},
-	ast.IsUsedLock:       {},
-	ast.MasterPosWait:    {},
-	ast.NameConst:        {},
-	ast.ReleaseLock:      {},
-	ast.RowCount:         {},
-	ast.Schema:           {},
-	ast.SessionUser:      {},
-	ast.Sleep:            {},
-	ast.SystemUser:       {},
-	ast.User:             {},
-	ast.Values:           {},
-	ast.Encrypt:          {},
-	ast.Version:          {},
-}
-
-// DeferredFunctions stores non-deterministic functions, which can be deferred only when the plan cache is enabled.
-var DeferredFunctions = map[string]struct{}{
-	ast.Now:              {},
-	ast.CurrentTimestamp: {},
-	ast.UTCTime:          {},
-	ast.Curtime:          {},
-	ast.CurrentTime:      {},
-	ast.UTCTimestamp:     {},
-	ast.UnixTimestamp:    {},
-	ast.Sysdate:          {},
-	ast.Curdate:          {},
-	ast.CurrentDate:      {},
-	ast.UTCDate:          {},
-	ast.Rand:             {},
-	ast.UUID:             {},
-}
-
 // inequalFunctions stores functions which cannot be propagated from column equal condition.
 var inequalFunctions = map[string]struct{}{
 	ast.IsNull: {},