update mssql drive to last working version 20180314172330-6a30f4e59a44 (#7306)

vendor/github.com/denisenkom/go-mssqldb/mssql_go19.go

@@ -0,0 +1,64 @@
+// +build go1.9
+
+package mssql
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"fmt"
+	// "github.com/cockroachdb/apd"
+)
+
+// Type alias provided for compibility.
+//
+// Deprecated: users should transition to the new names when possible.
+type MssqlDriver = Driver
+type MssqlBulk = Bulk
+type MssqlBulkOptions = BulkOptions
+type MssqlConn = Conn
+type MssqlResult = Result
+type MssqlRows = Rows
+type MssqlStmt = Stmt
+
+var _ driver.NamedValueChecker = &Conn{}
+
+func (c *Conn) CheckNamedValue(nv *driver.NamedValue) error {
+	switch v := nv.Value.(type) {
+	case sql.Out:
+		if c.outs == nil {
+			c.outs = make(map[string]interface{})
+		}
+		c.outs[nv.Name] = v.Dest
+
+		// Unwrap the Out value and check the inner value.
+		lnv := *nv
+		lnv.Value = v.Dest
+		err := c.CheckNamedValue(&lnv)
+		if err != nil {
+			if err != driver.ErrSkip {
+				return err
+			}
+			lnv.Value, err = driver.DefaultParameterConverter.ConvertValue(lnv.Value)
+			if err != nil {
+				return err
+			}
+		}
+		nv.Value = sql.Out{Dest: lnv.Value}
+		return nil
+	// case *apd.Decimal:
+	// 	return nil
+	default:
+		return driver.ErrSkip
+	}
+}
+
+func (s *Stmt) makeParamExtra(val driver.Value) (res Param, err error) {
+	switch val := val.(type) {
+	case sql.Out:
+		res, err = s.makeParam(val.Dest)
+		res.Flags = fByRevValue
+	default:
+		err = fmt.Errorf("mssql: unknown type for %T", val)
+	}
+	return
+}