Package com.kenshoo.jooq

Class SelectQueryExtender

java.lang.Object

com.kenshoo.jooq.SelectQueryExtender

public class SelectQueryExtender
extends java.lang.Object

Provides a convenient (and MySQL-friendly) way of solving the use-case of querying records by N-tuples of identifiers. The simplest case is querying by a list of IDs in which case it could be expressed with a simple IN. However in terms of performance (and logs) it's better to do a join with a temporary table populated with those IDs instead. This class does it automatically. In the more complicated case where the lookup is done by two fields (e.g. profile/affcode), it is impossible to express it with an IN condition and a temp table has to be used in this case. Example of simple usage:

 AdCriterias ac = AdCriterias.TABLE;
 SelectConditionStep<Record2<String, Integer>> query = dslContext.select(ac.affcode, ac.criteria_id)
         .from(ac).where(ac.profile_id.eq(profileId));
 try (QueryExtension<SelectConditionStep<Record2<String, Integer>>> queryExtension =
         SelectQueryExtender.of(query).withCondition(ac.affcode).in(affcodes)) {
     return queryExtension.getQuery().fetchMap(ac.affcode, ac.criteria_id);
 }
 

The returned object is a resource and it is crucial to place it inside try/finally block so it could be closed

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	SelectQueryExtender.BuilderIn1<Q extends org.jooq.SelectFinalStep,T>
static interface	SelectQueryExtender.BuilderIn2<Q extends org.jooq.SelectFinalStep,T1,T2>
static interface	SelectQueryExtender.BuilderIn3<Q extends org.jooq.SelectFinalStep,T1,T2,T3>
static interface	SelectQueryExtender.BuilderIn4<Q extends org.jooq.SelectFinalStep,T1,T2,T3,T4>
static interface	SelectQueryExtender.BuilderIn5<Q extends org.jooq.SelectFinalStep,T1,T2,T3,T4,T5>
static interface	SelectQueryExtender.BuilderWith<Q extends org.jooq.SelectFinalStep>

Constructor Summary

Constructors

Constructor	Description
SelectQueryExtender()

Method Summary

Modifier and Type	Method	Description
static <Q extends org.jooq.SelectFinalStep> SelectQueryExtender.BuilderWith<Q>	of(org.jooq.DSLContext dslContext, Q query)
static <Q extends org.jooq.SelectFinalStep> QueryExtension<Q>	of(org.jooq.DSLContext dslContext, Q query, java.util.List<FieldAndValues<?>> conditions)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SelectQueryExtender

public SelectQueryExtender()

Method Detail

of

public static <Q extends org.jooq.SelectFinalStep> QueryExtension<Q> of(org.jooq.DSLContext dslContext,
                                                                        Q query,
                                                                        java.util.List<FieldAndValues<?>> conditions)

of

public static <Q extends org.jooq.SelectFinalStep> SelectQueryExtender.BuilderWith<Q> of(org.jooq.DSLContext dslContext,
                                                                                         Q query)