2

我一直在尝试用 Java 编写一个查询，以在 2 个时间戳之间从 postgres 时间刻度数据库中选择数据，但我不断收到异常说 time_bucket 函数不存在

我无法将数据库中的时间戳列更改为日期，因为我没有所有权，并且我尝试将查询复制粘贴到 sql 编辑器，它工作得很好！

这是查询：

private final String SELECT_CANDLESTICK_BY_REQUEST = "SELECT " + 
        "   time_bucket(  interval '1 minute' , period_start_ts) AS periodts,  " + 
        "   count(*),  " + 
        "   first(metrics->>'askOpen',period_start_ts) as askOpen,  " + 
        "   max(metrics->>'askHigh') as askHigh,  " + 
        "   min(metrics->>'askLow') as askLow,  " + 
        "   last(metrics->>'askClose',period_start_ts) as askClose, " + 
        "   first(metrics->>'bidOpen',period_start_ts) as bidOpen,  " + 
        "   max(metrics->>'bidHigh') as bidHigh,  " + 
        "   min(metrics->>'bidLow') as bidLow,  " + 
        "   last(metrics->>'bidClose',period_start_ts) as bidClose " + 
        "  FROM candlestick_1_sec_fact " + 
        "  where period_start_ts between ? and ? " + 
        "  and symbol_cd = ? and liquidity_source_nm =  ? " + 
        "  GROUP BY periodts " + 
        "  ORDER BY periodts" ;

这就是我设置参数的方式：

PreparedStatement select = connection.prepareStatement(SELECT_CANDLESTICK_BY_REQUEST);


    select.setTimestamp(1, new Timestamp(startTime));
    select.setTimestamp(2, new Timestamp(endTime));
    select.setString(3, symbol);
    select.setString(4, source);

这是我得到的例外：

org.postgresql.util.PSQLException: ERROR: function time_bucket(interval, timestamp without time zone) does not exist . Hint: No function matches the given name and argument types. You might need to add explicit type casts.

即使我在查询中取出了interval关键字，它仍然无法识别time_bucket函数。

提前感谢您的时间和知识！

4

0 回答 0