Sql To Jpql Converter Tool
There is a tool for moving schema to a SQL database and Bravepoint has an OpenEdge to SQL replication tool, but I doubt that there is a tool for moving queries. ABL is record oriented and SQL is set oriented, which is quite a semantic mismatch. This can easily mean having to approach a problem from a very different direction. SQLtoEloquent is an app that lets you convert SQL Statements into Laravel Eloquent Query Builders. I've set a couple of rules for accuracy. Use parentheses when using BETWEEN operator. SELECT. FROM t WHERE (columnname BETWEEN value1 AND value2); When using ALIAS, always use the AS linking verb. SELECT uid AS userid. The Java Persistence Query Language (JPQL) is the query language defined by JPA. JPQL is similar to SQL, but operates on objects, attributes and relationships instead of tables and columns. JPQL can be used for reading (SELECT), as well as bulk updates (UPDATE) and deletes (DELETE).
posted 6 years ago
Put your SQL statement here- Put your schema definition here (optional) - - While this is not a strict requirement, you will - get much better results as jOOQ knows about constraints, - data types, column names, etc. Especially when - translating to jOOQ/Java code, in case of which the - resulting jOOQ code can table and column references - from the code generator.
- Optional 'thank-you' note:
SQL statement:
SELECT DISTINCT p.POLICY_1_NUM, p.TOTAL_PAYOUT_AMT, f.*
FROM FOREIGN_PARTY f, POLICY_PAYMENT p
WHERE p.POLICY_1_NUM = '1234567'
AND f.FOREIGN_PARTY_ID = p.FOREIGN_PARTY_ID
I have an Oracle database with a parent table (FOREIGN_PARTY) and a child table (POLICY_PAYMENT), with FOREIGN_PARTY_ID being the Primary Key in FOREIGN_PARTY and Foreign Key in POLICY_PAYMENT.
Parent Entity:
Child Entity:
I have tried this for JPQL (using @NamedQuery, and only need to retrieve data from a couple of columns in the child table):
SELECT f, p.policy1Num, p.totalPayoutAmt FROM ForeignParty f, PolicyPayment p WHERE p.policy1Num = :policy1Num
Which retrieves ALL records from parent table, yet strangely enough lists the policy number entered (the :policy1Num parameter) for all records, which is not correct. I also tried this for JPQL (which I thought more closely resembles the SQL statement above):
SELECT f FROM ForeignParty f JOIN f.policyPaymentCollection p WHERE p.policy1Num = :policy1Num AND f.foreignPartyId = p.foreignPartyId
But I get a The left and right expressions type must be of the same type error, referring to the f.foreignPartyId = p.foreignPartyId condition in the WHERE clause. I know each of those objects refers to a different entity, but both refer to the foreignPartyId variable associated with the PK/FK, so I don't understand why it doesn't work.
I am just trying to retrieve a value (or values) from the child table in addition to the parent table, and then populate a primefaces form with those values. I have no problem with primefaces itself, just the retrieval process as it relates to JPQL. I know it is also because I don't fully understand JPQL (and am likely doing the JPQL queries incorrectly), but am currently going through online tutorials and articles to learn it. If anyone can shed some light for me it would be greatly appreciated. Thank you!
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For the second one you are joining on the id column of ForeignParty, using the ForeignParty attribute of PolicyPayment. The former is an int (presumably) and the latter is a ForeignParty object, hence the error. This is one reason to get your naming correct. The attribute in PolicyPayment is not an id, it is an actual ForeignParty object.
Anyway, you have already defined the relationship between these tables so you can skip the join entirely and simply work from the PolicyPayment:
For the data you are interested in simply:
Note the last one gives you your ForeignParty object (and I changed the name).
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Many thanks for your reply, and for clarifying on the use of the ForeignParty attribute!!
Dumb question: The object on which you changed the name (i.e. p.foreignParty), if I try entering that in the @NamedQuery I get the message The state field path p.foreignParty cannot be resolved to a valid type.
No doubt I need to make a change to make that a valid type, but not sure how to do that?
Sorry, this should be obvious, but as you can tell, I am learning how this works. Thanks again for your help, very much appreciated!!
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You shouldn't be thinking in terms of ids for foreign keys in an Entity, but the classes/objects themselves.
The attribute should be (and is) a foreignParty.
Once that name is changed you'll need to change the mappedBy value in ForeignParty to match.
Does that make sense?
- Optional 'thank-you' note:
Learn how to take advantage of the Java Persistence query language and native SQL when querying over JPA entities.
Sql To Jpql Converter Tool Download
In Java EE, the Java Persistence API (JPA) is the standard API for accessing relational databases, providing a simple and efficient way for managing the object/relational mapping (ORM) of regular Java objects (POJO) to relational data. Such Java objects are called JPA entities or just entities.
An entity is typically (but not always) associated with a single relational table in the underlying database, so that each entity's instance represents a certain row of that table in Java. Like relational tables, entities are typically related to each other with relationships such as one-to-one, one-to-many, many-to-one, or many-to-many. It's fairly obvious that Java applications dealing with entities require a standard mechanism to access and navigate entity instances. The Java Persistence query language (JPQL) is specifically designed for this purpose.
Sql To Jpql Converter Tool Tutorial
In this article, you will learn some interesting ways of using JPQL, as well as native SQL to query over entities utilized within a Java application.