将 SQL 转换为 JPQL答案

【问题标题】：Translation SQL to JPQL将 SQL 转换为 JPQL
【发布时间】：2014-08-02 23:22:29
【问题描述】：

我很难弄清楚如何将以下 SQL 转换为 JPQL

SELECT * FROM consorder
WHERE
    consorder.redistid LIKE '123%'
HAVING
    MAX(consorder.redistid)

（在 MySQL 下就像一个魅力）。

@Query("select c from ConsignmentOrder c" +
       " where c.redistributionId like ?1" +
       " having max(c.redistributionId)")

我得到以下异常：

Caused by: <openjpa-2.2.2-r422266:1468616 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: Encountered "max ( c . redistributionId     ) <EOF>" at character 79, but expected: ["(", ")", "*", "+", "-", ".", "/", ":", "<", "<=", "<>", "=", ">", ">=", "?", "ABS", "ALL", "AND", "ANY", "AS",     "ASC", "AVG", "BETWEEN", "BOTH", "BY", "CASE", "COALESCE", "CONCAT", "COUNT", "CURRENT_DATE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "DELETE", "DESC",     "DISTINCT", "EMPTY", "ESCAPE", "EXISTS", "FETCH", "FROM", "GROUP", "HAVING", "IN", "INDEX", "INNER", "IS", "JOIN", "KEY", "LEADING", "LEFT", "LENGTH",     "LIKE", "LOCATE", "LOWER", "MAX", "MEMBER", "MIN", "MOD", "NEW", "NOT", "NULL", "NULLIF", "OBJECT", "OF", "OR", "ORDER", "OUTER", "SELECT", "SET",     "SIZE", "SOME", "SQRT", "SUBSTRING", "SUM", "TRAILING", "TRIM", "TYPE", "UPDATE", "UPPER", "VALUE", "WHERE", <BOOLEAN_LITERAL>, <DATE_LITERAL>, <    DECIMAL_LITERAL>, <IDENTIFIER>, <INTEGER_LITERAL>, <STRING_LITERAL2>, <STRING_LITERAL>, <TIMESTAMP_LITERAL>, <TIME_LITERAL>].
        at org.apache.openjpa.kernel.jpql.JPQL.generateParseException(JPQL.java:13162)
        at org.apache.openjpa.kernel.jpql.JPQL.jj_consume_token(JPQL.java:13036)
        at org.apache.openjpa.kernel.jpql.JPQL.conditional_primary(JPQL.java:1980)
        at org.apache.openjpa.kernel.jpql.JPQL.conditional_factor(JPQL.java:1958)
        at org.apache.openjpa.kernel.jpql.JPQL.conditional_term(JPQL.java:1807)
        at org.apache.openjpa.kernel.jpql.JPQL.conditional_expression(JPQL.java:1769)
        at org.apache.openjpa.kernel.jpql.JPQL.having_clause(JPQL.java:1701)
        at org.apache.openjpa.kernel.jpql.JPQL.select_statement(JPQL.java:107)
        at org.apache.openjpa.kernel.jpql.JPQL.parseQuery(JPQL.java:63)
        at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder$ParsedJPQL.parse(JPQLExpressionBuilder.java:2401)
        at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder$ParsedJPQL.<init>(JPQLExpressionBuilder.java:2388)
        at org.apache.openjpa.kernel.jpql.JPQLParser.parse(JPQLParser.java:49)
        ... 96 moreEncountered "max ( c . redistributionId ) <EOF>" at character 79, but expected: ["(", ")", "*",

任何帮助将不胜感激。

编辑：我稍微重组了查询：

 @Query("select c from ConsignmentOrder c where c.redistributionId = (select max(co.redistributionId) from (select co ConsignmentOrder co where co.redistributionId like ?1) as tmp )")

现在异常类似：

Caused by: <openjpa-2.2.2-r422266:1468616 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: Encountered "c . redistributionId = ( select max ( co . redistributionId ) from (" at character 40, but expected: ["(", ")", "*", "+", ",", "-", ".", "/", ":", "<", "<=", "<>", "=", ">", ">=", "?", "ABS", "ALL", "AND", "ANY", "AS", "ASC", "AVG", "BETWEEN", "BOTH", "BY", "CASE", "CLASS", "COALESCE", "CONCAT", "COUNT", "CURRENT_DATE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "DELETE", "DESC", "DISTINCT", "ELSE", "EMPTY", "END", "ENTRY", "ESCAPE", "EXISTS", "FETCH", "FROM", "GROUP", "HAVING", "IN", "INDEX", "INNER", "IS", "JOIN", "KEY", "LEADING", "LEFT", "LENGTH", "LIKE", "LOCATE", "LOWER", "MAX", "MEMBER", "MIN", "MOD", "NEW", "NOT", "NULL", "NULLIF", "OBJECT", "OF", "OR", "ORDER", "OUTER", "SELECT", "SET", "SIZE", "SOME", "SQRT", "SUBSTRING", "SUM", "THEN", "TRAILING", "TRIM", "TYPE", "UPDATE", "UPPER", "VALUE", "WHEN", "WHERE", <BOOLEAN_LITERAL>, <DATE_LITERAL>, <DECIMAL_LITERAL>, <IDENTIFIER>, <INTEGER_LITERAL>, <STRING_LITERAL2>, <STRING_LITERAL>, <TIMESTAMP_LITERAL>, <TIME_LITERAL>].

没有误导性的EOF。

【问题讨论】：

我猜是编码错误，因为您的错误中出现了文件结尾字符
嗯。我觉得这很奇怪，因为我的 IDE 既没有显示字符，也没有出现在这里 - 但我从我的 IDE 复制并粘贴了它......我看到了 EOF，但认为它是无稽之谈并忽略了它。
我建议将您的查询稍微配对一下，看看是您的环境中的问题，还是 OpenJPA 的问题。
我认为，我可以排除环境问题：1）我使用纯文本编辑器编辑文件 2）语义等效查询引发相同的异常。我认为，MySQL 的行为方式很肮脏。我怀疑，我不能像 MySQL 允许的那样在 OpenJPA 中使用聚合。我的解决方案现在是完整的 Java：retrieve all and find max.完成。
HAVING MAX(consorder.redistid) ...什么？您不仅有一个隐含的 GROUP BY，它没有列，也没有包含在 select 下的聚合函数；您没有指定完整的条件。这肯定是 MySQL 可以容忍但不应该使用的“脏 sql”。

标签： mysql sql jpql openjpa

【解决方案1】：

将其转换为 JPQL 重要吗？您可以轻松地在 JPA 中运行原生 SQL

使用实体管理器中存在的createNativeQuery() 方法，您可以使用 SQL 语法创建可执行查询

【讨论】：