jooq

问题 I have the following select-query creation: final DSLContext create = DSL.using(..., SQLDialect.POSTGRES); create .select(DSL.field("identifier"), DSL.field("name"), create.selectCount() .from(DSL.table("person")) .where(DSL.field("identifier").eq(DSL.field("personOuter.identifier"))) .asField("count")) .from(DSL.table("person").as("personOuter")) jOOQ generates the following query: select identifier, name, (select count(*) from person where identifier = personOuter.identifier) as "count"

问题 Hello I have a problem with obtain values from SQL query (in Java with using library of jooq)? create table `filetest`(`id` int not null auto_increment, `Meno` varchar(21) null, `Priezvisko` varchar(24) null, `Vek` int null, constraint `pk_filetest` primary key (`id`)) or insert into `filetest` (`Meno`, `Priezvisko`, `Vek`) values ('Jack', 'Daniels', '21') What I need to obtain (parse/get) are values: Meno, Priezvisko, Vek. Is it possible somehow get it from sql query name of columns of table

问题 In my application, a piece of content is identified using java.util.UUID . While storing information in the database, the corresponding MySQL data type that I am using is BINARY(16) . The default JDBC data type for BINARY is byte[] . So I have a custom org.jooq.Converter to translate between UUID and byte[]. I have a use-case in which I need to copy a record from a table into the same table but copy only certain columns and not all. In the original question I had posted here, The following

问题 I'm working on a migration project where a table is read from and certain fields are moved to another table. It's implemented in such a manner that a Java client app reads the source table on its own, the results are then lodged into a Pojo and a POST request is made using that Pojo as a request body, to a REST server which then handles the task of writing to another table. Currently, I'm using JOOQ in my client app to read from the source table, without any code generation. I'm using String

问题 private byte[] inMemSqliteDbBackup() { byte[] data = null; try (DSLContext dsl = DSL.using("jdbc:sqlite::memory:") { ... //insert some data dsl.execute("backup to " + data); // backup to byte[], but unsupported , a file is needed dsl.connection(connection -> { // or, get underlying connection and open inputstream // but there is no getInputStream in SqliteConnection }); } return data; } How can we backup in memory sqlite db to byte[] ? I went through SqliteConnection and it does not give an

问题 This is a follow-on question to my earlier question about specifying multiple schemata in java using jooq to interact with H2. My test H2 DB currently has 2 schemata, PUBLIC and INFORMATION_SCHEMA. PUBLIC is specified as the default schema by H2. When running a query that should extract information from eg INFORMATION_SCHEMA.TABLES the query fails with a "table unknown" SQL error. I am only able to execute such queries by executing a factory.use(INFORMATION_SCHEMA) . There are no build errors

问题 Lets say I have a table Person(id, fname, lname) and it contains a record (1, 'Michael', 'Bay') . Now I wish to create another record in Person table with the same fname and lname but different id i.e. (453456, 'Michael', 'Bay') . This is the way I would do in plain SQL INSERT INTO Person(id, fname, lname) SELECT 453456, Person.fname, Person.lname FROM Person WHERE Person.id = 1; How can this be done with JOOQ (ideally while retaining JOOQ's code generation and type safety features)? I am

问题 I have an issue using jooq codegen with JPADatabase. I have gone through this post and made the changes accordingly. My project contains sub modules and the entity classes are in domain module. I have biz module on which depends on domain. So I have this build configuration in biz module's pom.xml. <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> <

问题 I need to update the value of an integer column associated with a row using JOOQ on Java. In case the value of the column is not NULL I am aware that I could use this code: context.update(TABLENAME) .set(TABLENAME.COUNTER, TABLENAME.COUNTER.add(incrementValue)) .where(TABLENAME.ID.eq(id)) .execute(); however if the column value has NULL value I am wondering whether I could do something like the following by setting a default value in presence of NULL: context.update(TABLENAME) .set(TABLENAME

问题 I need to select all the values of a record. I learned that it´s possible to select each value of the record separately using the DSL.val() function. Let´s say we have a record R with the following properties: name: String , number: Int . Selecting each value of the record separately would look like this: R myRecord = new R() ctx.select(val(myRecord.name), val(myRecord.number)) As you can guess this will get pretty tedious when you have a record with 15 properties. Is it possible to select