jooQ 3.13 插入批次并更改一列

Question

I have table Car in two DB. Car in first table has column details as TEXT, in second has column details as JSONB. But I have only one generated class with TEXT field. How can I do batch insert into table 2 using generated class Car and I need to change field from TEXT to JSONB. I insert into table with dsl.batchInsert(records).execute();

And its my field in jooq generated class

public final TableField<Car, String> DETAILS = createField("details", org.jooq.impl.SQLDataType.TExT.nullable(false).defaultValue(org.jooq.impl.DSL.field("", org.jooq.impl.SQLDataType.TEXT)), this, "");

I need insert into second table smth like dsl.batchInsert(changeTextToJsonB(records)).execute();or smth else

Answer 1

The obvious answer is to generate two sets of classes, one for each DB, but I'm assuming this doesn't work for you.

You could then implement a custom data type binding and attach that to your column using the code generator. Your binding could read some context variable, eg from a ThreadLocal for a quick and dirty solution, or from your Configuration.data() map to decide whether it wants to delegate to the VARCHAR binding or to the JSONB binding.

public class TextOrJsonBinding implements Binding<String, String> {

    @Override
    public void set(BindingSetStatementContext<U> ctx) throws SQLException {
        var db = ctx.configuration().data("my-db");

        if ("db1".equals(db))
            SQLDataType.VARCHAR.getBinding().set(ctx);
        else if ("db2".equals(db))
            SQLDataType.JSONB.getBinding().set(ctx);
        else
            throw new DataAccessException("Unsupported DB: " + db);
    }

    // Repeat for all methods
}

With the above approach, you can now have two configurations for each DB (you probably already do, because you probably have different DataSource instances):

Configuration db1 = new DefaultConfiguration();
db1.data("my-db", "db1");

Configuration db2 = new DefaultConfiguration();
db2.data("my-db", "db2");

// Produces VARCHAR bindings
db1.dsl().batchInsert(records).execute();

// Produces JSONB bindings
db2.dsl().batchInsert(records).execute();