jooq

问题 In jOOQ am re-using a CTE in a later CTE. I am trying to summarise student completion records by year and school. I am using jOOQ 3.11.2 and postgres 9.4. I have working SQL code. However in jOOQ, I am getting null values returned. This appears to be a problem with how I am re-using one CTE in a later CTE. At first, I thought it might be a problem with the use of count(). From the manual, it looks like count() is being used correctly. As a test, I removed all reference to count() in the query

问题 I have this raw query for PSQL that I would like to transform to JOOQ query: SELECT DISTINCT date_trunc('day', ref_date) AS refdate FROM income WHERE probos_id = :probosId The best version I was able to create is: Result<Record1<Timestamp>> result = createQueryBuilder() .selectDistinct(incomeTable.REF_DATE.cast(Date.class).cast(Timestamp.class).as("refdate")) .from(incomeTable) .where(incomeTable.PROBOS_ID.eq(probosId)) .fetch(); This is the generated query: select distinct cast(cast("public"

问题 Hi i am trying to figure out how to write something like this in jooq select * from table where ( ( a = query or b = query or a = query ) and ( e = query or g = query or z = query) ) I cant figure out how to do nested condition in jooq. Please help. 回答1: You'll need to understand the following part of the API: public interface Condition { Condition and(Condition other); Condition or(Condition other); } So any Condition can be connected with other Conditions using and() / or() methods (and

问题 Hi i am trying to figure out how to write something like this in jooq select * from table where ( ( a = query or b = query or a = query ) and ( e = query or g = query or z = query) ) I cant figure out how to do nested condition in jooq. Please help. 回答1: You'll need to understand the following part of the API: public interface Condition { Condition and(Condition other); Condition or(Condition other); } So any Condition can be connected with other Conditions using and() / or() methods (and

问题 I'm trying to parse a SELECT statement in Java. I'm familiar with JOOQ, and was hoping to use that. I know it's not explicitly designed as an SQL parser—it's actually a lot more than that, so I was thinking there might be a way to use its internal parsers to parse SELECT queries. I saw some information on how to access some of JOOQ's internals using the Visitor pattern, but I need to navigate inside the query using a tree-like structure that will allow access to each part of the query

问题 I have a table experiment and a table tags. There may be many tags for one experiment. schema: -------- -------- |Table1| 1 n |Table2| | | <--------------> | | | | | | -------- -------- (experiment) (tags) Is it possible to create a query with jooq wich returns the experiments and the corresponding List of tags. something like Result where Record is a experimentRecord and a list of Tags, or a map. I also have a query wich returns only one result, is there something convenient out there? EDIT:

问题 I need to find the difference between two timestamps in seconds using JOOQ . I have taken a look at some answers on StackOverflow using raw SQL, however i didn´t find a way to implement it using JOOQ. Here are some solutions that i found that are using raw SQL: Find difference between timestamps in seconds in PostgreSQL MySQL: how to get the difference between two timestamps in seconds 回答1: Use DSL.timestampDiff(timestamp1, timestamp2). It will return the difference in terms of an INTERVAL

问题 I'm creating an interface of JOOQ TableRecord <R extends TableRecord<R>> Would anyone be able to explain the line above? Thanks 回答1: It means a class of type R, that implements the interface TableRecord<R> TableRecord<R> means that the interface is bound to the same type R. An example would be a class like: public class Bla implements TableRecord<Bla> I admit this seems a bit strange, but Java generics don't really differentiate between extends and implements , which leads to some confusion.

问题 I am converting Pure SQL to jOOQ now I have this ("SELECT Count(*) Count From Table "); I have to write this in jOOQ how can we write it? selectQueryRecord.addSelect(Here Count Function ); selectQueryRecord.addFrom(Table); 回答1: The most straight-forward way to implement what you're requesting is this, by using selectCount(): int count = DSL.using(configuration) .selectCount() .from(Table) .fetchOne(0, int.class); Alternatively, you can explicitly express the count() function: int count = DSL

问题 I am converting Pure SQL to jOOQ now I have this ("SELECT Count(*) Count From Table "); I have to write this in jOOQ how can we write it? selectQueryRecord.addSelect(Here Count Function ); selectQueryRecord.addFrom(Table); 回答1: The most straight-forward way to implement what you're requesting is this, by using selectCount(): int count = DSL.using(configuration) .selectCount() .from(Table) .fetchOne(0, int.class); Alternatively, you can explicitly express the count() function: int count = DSL