添加 PostgreSql 方言实现

[troyzhxu]

public class PostgreSqlDialect implements Dialect {

	@Override
	public void toUpperCase(StringBuilder builder, String dbField) {
		builder.append("upper").append("(").append(dbField).append(")");
	}
	
	@Override
	public SqlWrapper<Object> forPaginate(String fieldSelectSql, String fromWhereSql, Paging paging) {
		SqlWrapper<Object> wrapper = new SqlWrapper<>();
		StringBuilder ret = new StringBuilder();
		ret.append(fieldSelectSql).append(fromWhereSql);
		if (paging != null) {
			ret.append(" offset ? limit ?");
			wrapper.addPara(paging.getOffset());
			wrapper.addPara(paging.getSize());
		}
		wrapper.setSql(ret.toString());
		return wrapper;
	}

}

[troyzhxu]

https://github.com/ejlchina/bean-searcher/releases/tag/v3.6.0
https://bs.zhxu.cn/guide/latest/advance.html#sql-%E6%96%B9%E8%A8%80%EF%BC%88dialect%EF%BC%89