SQL Expressions: Replace NaN/Inf values with Null (#112641)

This is because MySQL doesn't support storing of NaN valuels, and therefore go-mysql-server isn't going to either.

Float fields/columns are always mapped to be nullable now, otherwise we would have to replace NaN/Inf with 0.

pkg/expr/sql/frame_table.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"math"
 	"strings"
 
 	mysql "github.com/dolthub/go-mysql-server/sql"
@@ -92,6 +93,16 @@ func (ri *rowIter) Next(ctx *mysql.Context) (mysql.Row, error) {
 			continue
 		}
 		val, _ := field.ConcreteAt(ri.row)
+		switch v := val.(type) {
+		case float32:
+			if math.IsNaN(float64(v)) || math.IsInf(float64(v), 0) {
+				continue
+			}
+		case float64:
+			if math.IsNaN(v) || math.IsInf(v, 0) {
+				continue
+			}
+		}
 
 		// If the field is JSON, convert json.RawMessage to types.JSONDocument
 		if raw, ok := val.(json.RawMessage); ok {