Function nodeAlterTableSetDefault

server/ast/alter_table.go:317–338

nodeAlterTableSetDefault converts a tree.AlterTableSetDefault instance into an equivalent vitess.DDL instance.

(ctx *Context, node *tree.AlterTableSetDefault, tableName vitess.TableName, ifExists bool)

// nodeAlterTableSetDefault converts a tree.AlterTableSetDefault instance into an equivalent vitess.DDL instance.
func nodeAlterTableSetDefault(ctx *Context, node *tree.AlterTableSetDefault, tableName vitess.TableName, ifExists bool) (*vitess.DDL, error) {
	expr, err := nodeExpr(ctx, node.Default)
	if err != nil {
		return nil, err
	}

	// GMS requires the AST to wrap function expressions in parens
	if _, ok := expr.(*vitess.FuncExpr); ok {
		expr = &vitess.ParenExpr{Expr: expr}
	}

	return &vitess.DDL{
		Action:   "alter",
		Table:    tableName,
		IfExists: ifExists,
		DefaultSpec: &vitess.DefaultSpec{
			Action: "set",
			Column: vitess.NewColIdent(bareIdentifier(node.Column)),
			Value:  expr,
		},
	}, nil
}

// nodeAlterTableAlterColumnType converts a tree.AlterTableAlterColumnType instance into an equivalent vitess.DDL instance.
func nodeAlterTableAlterColumnType(ctx *Context, node *tree.AlterTableAlterColumnType, tableName vitess.TableName, ifExists bool) (*vitess.DDL, error) {