snaker-core/src/main/java/org/snaker/engine/access/dialect/PostgresqlDialect.java
public String getPageSql(String sql, Page<?> page) {
		StringBuffer pageSql = new StringBuffer(sql.length() + 100);
		pageSql.append(getPageBefore(sql, page));
		pageSql.append(sql);
		pageSql.append(getPageAfter(sql, page));
		return pageSql.toString();
	}
public String getPageSql(String sql, Page<?> page) {
		StringBuffer pageSql = new StringBuffer(sql.length() + 100);
		pageSql.append(getPageBefore(sql, page));
		pageSql.append(sql);
		pageSql.append(getPageAfter(sql, page));
		return pageSql.toString();
	}
Postgresql分页通过limit实现