gen4: Fast aggregations (#13904)

Signed-off-by: Vicent Marti <vmg@strn.cat>

go/mysql/decimal/decimal.go

@@ -677,6 +677,10 @@ func (d *Decimal) ensureInitialized() {
 	}
 }
 
+func (d Decimal) IsInitialized() bool {
+	return d.value != nil
+}
+
 // RescalePair rescales two decimals to common exponential value (minimal exp of both decimals)
 func RescalePair(d1 Decimal, d2 Decimal) (Decimal, Decimal) {
 	d1.ensureInitialized()

go/sqltypes/testing.go

@@ -18,8 +18,14 @@ package sqltypes
 
 import (
 	"bytes"
+	crand "crypto/rand"
+	"encoding/base64"
+	"encoding/hex"
 	"fmt"
+	"math/rand"
+	"strconv"
 	"strings"
+	"time"
 
 	querypb "vitess.io/vitess/go/vt/proto/query"
 )
@@ -154,3 +160,124 @@ func PrintResults(results []*Result) string {
 func split(str string) []string {
 	return strings.Split(str, "|")
 }
+
+func TestRandomValues() (Value, Value) {
+	if rand.Int()%2 == 0 {
+		// create a single value, and turn it into two different types
+		v := rand.Int()
+		return randomNumericType(v), randomNumericType(v)
+	}
+
+	// just produce two arbitrary random values and compare
+	return randomNumericType(rand.Int()), randomNumericType(rand.Int())
+}
+
+func randomNumericType(i int) Value {
+	r := rand.Intn(len(numericTypes))
+	return numericTypes[r](i)
+}
+
+var numericTypes = []func(int) Value{
+	func(i int) Value { return NULL },
+	func(i int) Value { return NewInt8(int8(i)) },
+	func(i int) Value { return NewInt32(int32(i)) },
+	func(i int) Value { return NewInt64(int64(i)) },
+	func(i int) Value { return NewUint64(uint64(i)) },
+	func(i int) Value { return NewUint32(uint32(i)) },
+	func(i int) Value { return NewFloat64(float64(i)) },
+	func(i int) Value { return NewDecimal(fmt.Sprintf("%d", i)) },
+	func(i int) Value { return NewVarChar(fmt.Sprintf("%d", i)) },
+	func(i int) Value { return NewVarChar(fmt.Sprintf("  %f aa", float64(i))) },
+}
+
+type RandomGenerator func() Value
+
+func randomBytes() []byte {
+	b := make([]byte, rand.Intn(128))
+	_, _ = crand.Read(b)
+	return b
+}
+
+var RandomGenerators = map[Type]RandomGenerator{
+	Null: func() Value {
+		return NULL
+	},
+	Int8: func() Value {
+		return NewInt8(int8(rand.Intn(255)))
+	},
+	Int32: func() Value {
+		return NewInt32(rand.Int31())
+	},
+	Int64: func() Value {
+		return NewInt64(rand.Int63())
+	},
+	Uint32: func() Value {
+		return NewUint32(rand.Uint32())
+	},
+	Uint64: func() Value {
+		return NewUint64(rand.Uint64())
+	},
+	Float64: func() Value {
+		return NewFloat64(rand.ExpFloat64())
+	},
+	Decimal: func() Value {
+		dec := fmt.Sprintf("%d.%d", rand.Intn(9999999999), rand.Intn(9999999999))
+		if rand.Int()&0x1 == 1 {
+			dec = "-" + dec
+		}
+		return NewDecimal(dec)
+	},
+	VarChar: func() Value {
+		return NewVarChar(base64.StdEncoding.EncodeToString(randomBytes()))
+	},
+	VarBinary: func() Value {
+		return NewVarBinary(string(randomBytes()))
+	},
+	Date: func() Value {
+		return NewDate(randTime().Format(time.DateOnly))
+	},
+	Datetime: func() Value {
+		return NewDatetime(randTime().Format(time.DateTime))
+	},
+	Timestamp: func() Value {
+		return NewTimestamp(randTime().Format(time.DateTime))
+	},
+	Time: func() Value {
+		return NewTime(randTime().Format(time.TimeOnly))
+	},
+	TypeJSON: func() Value {
+		var j string
+		switch rand.Intn(6) {
+		case 0:
+			j = "null"
+		case 1:
+			i := rand.Int63()
+			if rand.Int()&0x1 == 1 {
+				i = -i
+			}
+			j = strconv.FormatInt(i, 10)
+		case 2:
+			j = strconv.FormatFloat(rand.NormFloat64(), 'g', -1, 64)
+		case 3:
+			j = strconv.Quote(hex.EncodeToString(randomBytes()))
+		case 4:
+			j = "true"
+		case 5:
+			j = "false"
+		}
+		v, err := NewJSON(j)
+		if err != nil {
+			panic(err)
+		}
+		return v
+	},
+}
+
+func randTime() time.Time {
+	min := time.Date(1970, 1, 0, 0, 0, 0, 0, time.UTC).Unix()
+	max := time.Date(2070, 1, 0, 0, 0, 0, 0, time.UTC).Unix()
+	delta := max - min
+
+	sec := rand.Int63n(delta) + min
+	return time.Unix(sec, 0)
+}

go/sqltypes/value.go

@@ -31,6 +31,7 @@ import (
 	"vitess.io/vitess/go/hack"
 	"vitess.io/vitess/go/mysql/decimal"
 	"vitess.io/vitess/go/mysql/fastparse"
+	"vitess.io/vitess/go/mysql/format"
 	querypb "vitess.io/vitess/go/vt/proto/query"
 	vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
 	"vitess.io/vitess/go/vt/vterrors"
@@ -186,12 +187,12 @@ func NewBoolean(v bool) Value {
 
 // NewFloat64 builds an Float64 Value.
 func NewFloat64(v float64) Value {
-	return MakeTrusted(Float64, strconv.AppendFloat(nil, v, 'g', -1, 64))
+	return MakeTrusted(Float64, format.FormatFloat(v))
 }
 
 // NewFloat32 builds a Float32 Value.
 func NewFloat32(v float32) Value {
-	return MakeTrusted(Float32, strconv.AppendFloat(nil, float64(v), 'g', -1, 64))
+	return MakeTrusted(Float32, format.FormatFloat(float64(v)))
 }
 
 // NewVarChar builds a VarChar Value.