public static IAlterTableAction Build(PlSqlParser.AlterTableActionContext context)
{
if (context.addColumnAction() != null) {
var column = TableColumn.Form(context.addColumnAction().tableColumn(), new List<ColumnConstraint>());
return new AddColumnAction(column);
}
if (context.addConstraintAction() != null) {
var constraint = TableConstraint.Form(context.addConstraintAction().tableConstraint());
return new AddConstraintAction(constraint);
}
if (context.dropColumnAction() != null) {
var columnName = context.dropColumnAction().id().GetText();
return new DropColumnAction(columnName);
}
if (context.dropConstraintAction() != null) {
var constraintName = context.dropConstraintAction().id().GetText();
return new DropConstraintAction(constraintName);
}
if (context.dropPrimaryKeyAction() != null) {
return new DropPrimaryKeyAction();
}
if (context.dropDefaultAction() != null) {
var columnName = Name.Simple(context.dropDefaultAction().columnName());
return new DropDefaultAction(columnName);
}
if (context.setDefaultAction() != null) {
var columnName = Name.Simple(context.setDefaultAction().columnName());
var defaultValue = Expression.Build(context.setDefaultAction().expressionWrapper());
return new SetDefaultAction(columnName, defaultValue);
}
throw new ParseCanceledException("The ALTER TABLE action is not supported");
}