sql/mysql: add support for table-level auto_increment

schema/schemaspec/spec.go

@@ -103,18 +103,28 @@ type (
 	}
 )
 
-// Int returns an integer from the Value of the Attr. If The value is not a LiteralValue or the value
+// Int returns an int from the Value of the Attr. If The value is not a LiteralValue or the value
 // cannot be converted to an integer an error is returned.
 func (a *Attr) Int() (int, error) {
+	i, err := a.Int64()
+	if err != nil {
+		return 0, err
+	}
+	return int(i), nil
+}
+
+// Int64 returns an int64 from the Value of the Attr. If The value is not a LiteralValue or the value
+// cannot be converted to an integer an error is returned.
+func (a *Attr) Int64() (int64, error) {
 	lit, ok := a.V.(*LiteralValue)
 	if !ok {
 		return 0, fmt.Errorf("schema: cannot read attribute %q as literal", a.K)
 	}
-	s, err := strconv.Atoi(lit.V)
+	i, err := strconv.ParseInt(lit.V, 10, 64)
 	if err != nil {
-		return 0, fmt.Errorf("schema: cannot read attribute %q as int: %w", a.K, err)
+		return 0, fmt.Errorf("schema: cannot read attribute %q as integer: %w", a.K, err)
 	}
-	return s, nil
+	return i, nil
 }
 
 // String returns a string from the Value of the Attr. If The value is not a LiteralValue

sql/mysql/sqlspec.go

@@ -89,6 +89,15 @@ func convertTable(spec *sqlspec.Table, parent *schema.Schema) (*schema.Table, er
 	if err := convertCharset(spec, &t.Attrs); err != nil {
 		return nil, err
 	}
+	// MySQL allows setting the initial AUTO_INCREMENT value
+	// on the table definition.
+	if attr, ok := spec.Attr("auto_increment"); ok {
+		b, err := attr.Int64()
+		if err != nil {
+			return nil, err
+		}
+		t.AddAttrs(&AutoIncrement{V: b})
+	}
 	return t, err
 }
 

sql/mysql/sqlspec_test.go

@@ -73,6 +73,7 @@ table "table" {
 		enforced = false
 	}
 	comment = "table comment"
+	auto_increment = 1000
 }
 
 table "accounts" {
@@ -185,6 +186,7 @@ table "accounts" {
 					Attrs: []schema.Attr{&Enforced{V: false}},
 				},
 				&schema.Comment{Text: "table comment"},
+				&AutoIncrement{V: 1000},
 			},
 		},
 		{