Package org.jooq

Interface FieldLike

All Known Subinterfaces:

Select<R>, SelectConditionStep<R>, SelectConnectByAfterStartWithConditionStep<R>, SelectConnectByConditionStep<R>, SelectConnectByStep<R>, SelectDistinctOnStep<R>, SelectFinalStep<R>, SelectForUpdateOfStep<R>, SelectForUpdateStep<R>, SelectForUpdateWaitStep<R>, SelectFromStep<R>, SelectGroupByStep<R>, SelectHavingConditionStep<R>, SelectHavingStep<R>, SelectIntoStep<R>, SelectJoinStep<R>, SelectLimitAfterOffsetStep<R>, SelectLimitPercentAfterOffsetStep<R>, SelectLimitPercentStep<R>, SelectLimitStep<R>, SelectOffsetStep<R>, SelectOnConditionStep<R>, SelectOptionalOnStep<R>, SelectOptionStep<R>, SelectOrderByStep<R>, SelectQualifyConditionStep<R>, SelectQualifyStep<R>, SelectQuery<R>, SelectSeekLimitStep<R>, SelectSeekStep1<R,T1>, SelectSeekStep10<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>, SelectSeekStep11<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>, SelectSeekStep12<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>, SelectSeekStep13<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13>, SelectSeekStep14<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14>, SelectSeekStep15<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15>, SelectSeekStep16<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16>, SelectSeekStep17<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17>, SelectSeekStep18<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18>, SelectSeekStep19<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19>, SelectSeekStep2<R,T1,T2>, SelectSeekStep20<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19,T20>, SelectSeekStep21<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19,T20,T21>, SelectSeekStep22<R,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14,T15,T16,T17,T18,T19,T20,T21,T22>, SelectSeekStep3<R,T1,T2,T3>, SelectSeekStep4<R,T1,T2,T3,T4>, SelectSeekStep5<R,T1,T2,T3,T4,T5>, SelectSeekStep6<R,T1,T2,T3,T4,T5,T6>, SelectSeekStep7<R,T1,T2,T3,T4,T5,T6,T7>, SelectSeekStep8<R,T1,T2,T3,T4,T5,T6,T7,T8>, SelectSeekStep9<R,T1,T2,T3,T4,T5,T6,T7,T8,T9>, SelectSeekStepN<R>, SelectSelectStep<R>, SelectStartWithStep<R>, SelectUnionStep<R>, SelectWhereStep<R>, SelectWindowStep<R>, SelectWithTiesAfterOffsetStep<R>, SelectWithTiesStep<R>

public interface FieldLike

An object that can behave like a field (a field-like object).

Instances of this type cannot be created directly, only of its subtypes.

Author:

Lukas Eder

Method Summary

Modifier and Type	Method	Description
<T> Field<T>	asField()	The underlying field representation of this object.
<T> Field<T>	asField(java.lang.String alias)	The underlying field representation of this object.
<T> Field<T>	asField(java.util.function.Function<? super Field<T>,? extends java.lang.String> aliasFunction)	The underlying field representation of this object.

Method Detail

asField

<T> Field<T> asField()

The underlying field representation of this object.

This method is useful for things like SELECT y.*, (SELECT a FROM x) FROM y

Returns:

This result provider as a Field<?> object

asField

<T> Field<T> asField(java.lang.String alias)

The underlying field representation of this object.

This method is useful for things like SELECT y.*, (SELECT a FROM x) [alias] FROM y

Note that the case-sensitivity of the returned field depends on Settings.getRenderQuotedNames(). By default, field aliases are quoted, and thus case-sensitive in many SQL dialects!

Returns:

This result provider as a Field<?> object

asField

@Support
<T> Field<T> asField(java.util.function.Function<? super Field<T>,? extends java.lang.String> aliasFunction)

The underlying field representation of this object.

This method is useful for things like SELECT y.*, (SELECT a FROM x) [alias] FROM y

Note that the case-sensitivity of the returned field depends on Settings.getRenderQuotedNames(). By default, field aliases are quoted, and thus case-sensitive in many SQL dialects!

This works like asField(String), except that field aliases are provided by a function. This is useful, for instance, to prefix all columns with a common prefix (on Table.as(String, Function)):

 MY_TABLE.as("t1", f -> "prefix_" + f.getName());
 

And then to use the same function also for individual fields:

 MY_TABLE.MY_COLUMN.as(f -> "prefix_" + f.getName());