expression: enable revive for part

build/nogo_config.json

@@ -511,6 +511,7 @@
       "types/json_binary_functions.go": "types/json_binary_functions.go",
       "types/json_binary_test.go": "types/json_binary_test.go",
       "ddl/": "ddl",
+      "expression/a": "expression/a code",
       "expression/builtin.go": "expression/builtin code",
       "expression/builtin_cast.go": "expression/builtin_cast code",
       "server/": "server/ code",

expression/aggregation/agg_to_pb.go

@@ -131,11 +131,11 @@ func AggFuncToPBExpr(sctx sessionctx.Context, client kv.Client, aggFunc *AggFunc
 			orderBy = append(orderBy, pbArg)
 		}
 		// encode GroupConcatMaxLen
-		GCMaxLen, err := sctx.GetSessionVars().GetSessionOrGlobalSystemVar(context.Background(), variable.GroupConcatMaxLen)
+		gcMaxLen, err := sctx.GetSessionVars().GetSessionOrGlobalSystemVar(context.Background(), variable.GroupConcatMaxLen)
 		if err != nil {
 			return nil, errors.Errorf("Error happened when buildGroupConcat: no system variable named '%s'", variable.GroupConcatMaxLen)
 		}
-		maxLen, err := strconv.ParseUint(GCMaxLen, 10, 64)
+		maxLen, err := strconv.ParseUint(gcMaxLen, 10, 64)
 		// Should never happen
 		if err != nil {
 			return nil, errors.Errorf("Error happened when buildGroupConcat: %s", err.Error())

expression/aggregation/avg.go

@@ -94,6 +94,6 @@ func (af *avgFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
 }
 
 // GetPartialResult implements Aggregation interface.
-func (af *avgFunction) GetPartialResult(evalCtx *AggEvaluateContext) []types.Datum {
+func (*avgFunction) GetPartialResult(evalCtx *AggEvaluateContext) []types.Datum {
 	return []types.Datum{types.NewIntDatum(evalCtx.Count), evalCtx.Value}
 }

expression/aggregation/base_func.go

@@ -127,7 +127,7 @@ func (a *baseFuncDesc) TypeInfer(ctx sessionctx.Context) error {
 	return nil
 }
 
-func (a *baseFuncDesc) typeInfer4Count(ctx sessionctx.Context) {
+func (a *baseFuncDesc) typeInfer4Count(sessionctx.Context) {
 	a.RetTp = types.NewFieldType(mysql.TypeLonglong)
 	a.RetTp.SetFlen(21)
 	a.RetTp.SetDecimal(0)
@@ -182,7 +182,7 @@ func (a *baseFuncDesc) typeInfer4ApproxPercentile(ctx sessionctx.Context) error
 
 // typeInfer4Sum should return a "decimal", otherwise it returns a "double".
 // Because child returns integer or decimal type.
-func (a *baseFuncDesc) typeInfer4Sum(ctx sessionctx.Context) {
+func (a *baseFuncDesc) typeInfer4Sum(sessionctx.Context) {
 	switch a.Args[0].GetType().GetType() {
 	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeYear:
 		a.RetTp = types.NewFieldType(mysql.TypeNewDecimal)
@@ -216,7 +216,7 @@ func (a *baseFuncDesc) TypeInfer4AvgSum(avgRetType *types.FieldType) {
 
 // typeInfer4Avg should returns a "decimal", otherwise it returns a "double".
 // Because child returns integer or decimal type.
-func (a *baseFuncDesc) typeInfer4Avg(ctx sessionctx.Context) {
+func (a *baseFuncDesc) typeInfer4Avg(sessionctx.Context) {
 	switch a.Args[0].GetType().GetType() {
 	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong:
 		a.RetTp = types.NewFieldType(mysql.TypeNewDecimal)
@@ -291,7 +291,7 @@ func (a *baseFuncDesc) typeInfer4BitFuncs(ctx sessionctx.Context) {
 	a.Args[0] = expression.WrapWithCastAsInt(ctx, a.Args[0])
 }
 
-func (a *baseFuncDesc) typeInfer4JsonArrayAgg(ctx sessionctx.Context) {
+func (a *baseFuncDesc) typeInfer4JsonArrayAgg(sessionctx.Context) {
 	a.RetTp = types.NewFieldType(mysql.TypeJSON)
 	types.SetBinChsClnFlag(a.RetTp)
 }
@@ -338,7 +338,7 @@ func (a *baseFuncDesc) typeInfer4LeadLag(ctx sessionctx.Context) {
 	}
 }
 
-func (a *baseFuncDesc) typeInfer4PopOrSamp(ctx sessionctx.Context) {
+func (a *baseFuncDesc) typeInfer4PopOrSamp(sessionctx.Context) {
 	// var_pop/std/var_samp/stddev_samp's return value type is double
 	a.RetTp = types.NewFieldType(mysql.TypeDouble)
 	a.RetTp.SetFlen(mysql.MaxRealWidth)

expression/aggregation/bit_and.go

@@ -32,7 +32,7 @@ func (bf *bitAndFunction) CreateContext(sc *stmtctx.StatementContext) *AggEvalua
 	return evalCtx
 }
 
-func (bf bitAndFunction) ResetContext(sc *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
+func (*bitAndFunction) ResetContext(_ *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
 	evalCtx.Value.SetUint64(math.MaxUint64)
 }
 
@@ -58,7 +58,7 @@ func (bf *bitAndFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.Statem
 }
 
 // GetResult implements Aggregation interface.
-func (bf *bitAndFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
+func (*bitAndFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
 	return evalCtx.Value
 }
 

expression/aggregation/bit_or.go

@@ -30,7 +30,7 @@ func (bf *bitOrFunction) CreateContext(sc *stmtctx.StatementContext) *AggEvaluat
 	return evalCtx
 }
 
-func (bf *bitOrFunction) ResetContext(sc *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
+func (*bitOrFunction) ResetContext(_ *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
 	evalCtx.Value.SetUint64(0)
 }
 
@@ -56,7 +56,7 @@ func (bf *bitOrFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.Stateme
 }
 
 // GetResult implements Aggregation interface.
-func (bf *bitOrFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
+func (*bitOrFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
 	return evalCtx.Value
 }
 

expression/aggregation/bit_xor.go

@@ -30,7 +30,7 @@ func (bf *bitXorFunction) CreateContext(sc *stmtctx.StatementContext) *AggEvalua
 	return evalCtx
 }
 
-func (bf *bitXorFunction) ResetContext(sc *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
+func (*bitXorFunction) ResetContext(_ *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
 	evalCtx.Value.SetUint64(0)
 }
 
@@ -56,7 +56,7 @@ func (bf *bitXorFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.Statem
 }
 
 // GetResult implements Aggregation interface.
-func (bf *bitXorFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
+func (*bitXorFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
 	return evalCtx.Value
 }
 

expression/aggregation/concat.go

@@ -37,15 +37,15 @@ type concatFunction struct {
 	truncated bool
 }
 
-func (cf *concatFunction) writeValue(evalCtx *AggEvaluateContext, val types.Datum) {
+func (*concatFunction) writeValue(evalCtx *AggEvaluateContext, val types.Datum) {
 	if val.Kind() == types.KindBytes {
 		evalCtx.Buffer.Write(val.GetBytes())
 	} else {
 		fmt.Fprintf(evalCtx.Buffer, "%v", val.GetValue())
 	}
 }
 
-func (cf *concatFunction) initSeparator(sc *stmtctx.StatementContext, row chunk.Row) error {
+func (cf *concatFunction) initSeparator(_ *stmtctx.StatementContext, row chunk.Row) error {
 	sepArg := cf.Args[len(cf.Args)-1]
 	sepDatum, err := sepArg.Eval(row)
 	if err != nil {

expression/aggregation/count.go

@@ -25,7 +25,7 @@ type countFunction struct {
 }
 
 // Update implements Aggregation interface.
-func (cf *countFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.StatementContext, row chunk.Row) error {
+func (cf *countFunction) Update(evalCtx *AggEvaluateContext, _ *stmtctx.StatementContext, row chunk.Row) error {
 	var datumBuf []types.Datum
 	if cf.HasDistinct {
 		datumBuf = make([]types.Datum, 0, len(cf.Args))
@@ -68,7 +68,7 @@ func (cf *countFunction) ResetContext(sc *stmtctx.StatementContext, evalCtx *Agg
 }
 
 // GetResult implements Aggregation interface.
-func (cf *countFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
+func (*countFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
 	d.SetInt64(evalCtx.Count)
 	return d
 }

expression/aggregation/descriptor.go

@@ -57,11 +57,11 @@ func NewAggFuncDesc(ctx sessionctx.Context, name string, args []expression.Expre
 }
 
 // NewAggFuncDescForWindowFunc creates an aggregation function from window functions, where baseFuncDesc may be ready.
-func NewAggFuncDescForWindowFunc(ctx sessionctx.Context, Desc *WindowFuncDesc, hasDistinct bool) (*AggFuncDesc, error) {
-	if Desc.RetTp == nil { // safety check
-		return NewAggFuncDesc(ctx, Desc.Name, Desc.Args, hasDistinct)
+func NewAggFuncDescForWindowFunc(ctx sessionctx.Context, desc *WindowFuncDesc, hasDistinct bool) (*AggFuncDesc, error) {
+	if desc.RetTp == nil { // safety check
+		return NewAggFuncDesc(ctx, desc.Name, desc.Args, hasDistinct)
 	}
-	return &AggFuncDesc{baseFuncDesc: baseFuncDesc{Desc.Name, Desc.Args, Desc.RetTp}, HasDistinct: hasDistinct}, nil
+	return &AggFuncDesc{baseFuncDesc: baseFuncDesc{desc.Name, desc.Args, desc.RetTp}, HasDistinct: hasDistinct}, nil
 }
 
 // String implements the fmt.Stringer interface.

expression/aggregation/first_row.go

@@ -26,7 +26,7 @@ type firstRowFunction struct {
 }
 
 // Update implements Aggregation interface.
-func (ff *firstRowFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.StatementContext, row chunk.Row) error {
+func (ff *firstRowFunction) Update(evalCtx *AggEvaluateContext, _ *stmtctx.StatementContext, row chunk.Row) error {
 	if evalCtx.GotFirstRow {
 		return nil
 	}
@@ -43,11 +43,11 @@ func (ff *firstRowFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.Stat
 }
 
 // GetResult implements Aggregation interface.
-func (ff *firstRowFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
+func (*firstRowFunction) GetResult(evalCtx *AggEvaluateContext) types.Datum {
 	return evalCtx.Value
 }
 
-func (ff *firstRowFunction) ResetContext(_ *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
+func (*firstRowFunction) ResetContext(_ *stmtctx.StatementContext, evalCtx *AggEvaluateContext) {
 	evalCtx.GotFirstRow = false
 }
 

expression/aggregation/max_min.go

@@ -28,7 +28,7 @@ type maxMinFunction struct {
 }
 
 // GetResult implements Aggregation interface.
-func (mmf *maxMinFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
+func (*maxMinFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
 	return evalCtx.Value
 }
 

expression/aggregation/sum.go

@@ -30,7 +30,7 @@ func (sf *sumFunction) Update(evalCtx *AggEvaluateContext, sc *stmtctx.Statement
 }
 
 // GetResult implements Aggregation interface.
-func (sf *sumFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
+func (*sumFunction) GetResult(evalCtx *AggEvaluateContext) (d types.Datum) {
 	return evalCtx.Value
 }