QueryOperator (hsweb-easy-orm-rdb 4.1.1 API)

java.lang.Object
- org.hswebframework.ezorm.rdb.operator.dml.QueryOperator

所有已实现的接口:: LogicalOperation<QueryOperator>, TermTypeConditionalSupport

直接已知子类:: BuildParameterQueryOperator

public abstract class QueryOperator
extends Object
implements LogicalOperation<QueryOperator>

查询操作抽象类,提供DSL查询操作


 database
 .dml()
 .query()
 .select(Selects.count("id","total"))
 .from("user")
 .where(dsl-> dsl.is("name","1"))
 .execute()
 .reactive(map())
 .subscribe(data-> );

从以下版本开始:: 4.0
作者:: zhouhao

嵌套类概要
- 从接口继承的嵌套类/接口 org.hswebframework.ezorm.core.TermTypeConditionalSupport
  TermTypeConditionalSupport.Accepter<T,O>, TermTypeConditionalSupport.SimpleAccepter<T,O>

构造器概要

构造器
构造器和说明

QueryOperator()

构造器
构造器和说明
`QueryOperator()`

方法概要

所有方法实例方法抽象方法具体方法
限定符和类型	方法和说明
`abstract QueryOperator`	`clone()`
`abstract QueryOperator`	`context(Map<String,Object> context)`
`abstract <E,R> QueryResultOperator<E,R>`	`fetch(ResultWrapper<E,R> wrapper)` 执行查询操作
`abstract QueryOperator`	`forUpdate()`
`QueryOperator`	`fullJoin(String target, java.util.function.Consumer<JoinOperator> joinOperatorConsumer)`
`abstract SqlRequest`	`getSql()` 获取SQL请求
`abstract QueryOperator`	`groupBy(Operator<SelectColumn>... operators)`
`abstract QueryOperator`	`having(Operator<?>... operators)`
`QueryOperator`	`innerJoin(String target, java.util.function.Consumer<JoinOperator> joinOperatorConsumer)`
`abstract QueryOperator`	`join(Join... on)` 表关联操作
`QueryOperator`	`join(java.util.function.Supplier<Join>... on)` 表关联操作
`QueryOperator`	`leftJoin(String target, java.util.function.Consumer<JoinOperator> joinOperatorConsumer)`
`abstract QueryOperator`	`orderBy(SortOrder... operators)`
`QueryOperator`	`orderBy(SortOrderSupplier... operators)`
`abstract QueryOperator`	`paging(int pageIndex, int pageSize)`
`QueryOperator`	`rightJoin(String target, java.util.function.Consumer<JoinOperator> joinOperatorConsumer)`
`abstract QueryOperator`	`select(Collection<String> columns)` 指定查询列
`<T> QueryOperator`	`select(MethodReferenceColumn<T>... columns)` 使用方法引用来指定查询列 `select(userEntity::getId,userEntity::getName)`
`abstract QueryOperator`	`select(SelectColumn... columns)` 指定查询列
`QueryOperator`	`select(SelectColumnSupplier... operators)` 通过`SelectColumnSupplier`来指定查询列
`<T> QueryOperator`	`select(StaticMethodReferenceColumn<T>... columns)` 使用静态方法引用来指定查询列 `select(UserEntity::getId,UserEntity::getName)`
`abstract QueryOperator`	`select(String... columns)` 指定查询列
`abstract QueryOperator`	`selectExcludes(Collection<String> columns)` 指定忽略查询的列
`<T> QueryOperator`	`selectExcludes(StaticMethodReferenceColumn<T>... columns)` 使用静态方法引用来指定不查询的列 `selectExcludes(UserEntity::getId,UserEntity::getName)`
`QueryOperator`	`selectExcludes(String... columns)` 指定忽略查询的列
`abstract QueryOperator`	`setParam(QueryParam param)` 通过`QueryParam`来设置查询
`abstract QueryOperator`	`where(Collection<Term> terms)` 添加多个过滤条件
`abstract QueryOperator`	`where(java.util.function.Consumer<Conditional<?>> conditionalConsumer)` 通过回调函数来指定where条件 where(dsl->dsl.and("name","name"))
`abstract QueryOperator`	`where(Term term)` 添加过滤条件
`QueryOperator`	`where(TermSupplier... condition)` 根据TermSupplier来添加过滤条件

从类继承的方法 java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.hswebframework.ezorm.core.LogicalOperation
accept, accept, accept, as, castSelf, each, each, each, each, each, each, each, each, each, each, each, when, when, when, when, when, when, when, when, when, when

构造器详细资料
- QueryOperator
```
public QueryOperator()
```

方法详细资料

select
```
public abstract QueryOperator select(String... columns)
```
指定查询列

参数:

columns - 列名

返回:

QueryOperator

select

public abstract QueryOperator select(Collection<String> columns)

指定查询列

参数:: columns - 列名
返回:: QueryOperator

select
```
public abstract QueryOperator select(SelectColumn... columns)
```
指定查询列

参数:

columns - 列

返回:

QueryOperator

另请参阅:

SelectColumn

select
```
public final QueryOperator select(SelectColumnSupplier... operators)
```
通过SelectColumnSupplier来指定查询列

参数:

operators - SelectColumnSupplier

返回:

QueryOperator

另请参阅:

Selects

select

@SafeVarargs
public final <T> QueryOperator select(MethodReferenceColumn<T>... columns)

使用方法引用来指定查询列


     select(userEntity::getId,userEntity::getName)

类型参数:: T - 泛型
参数:: columns - 方法引用
返回:: QueryOperator

select

@SafeVarargs
public final <T> QueryOperator select(StaticMethodReferenceColumn<T>... columns)

使用静态方法引用来指定查询列


     select(UserEntity::getId,UserEntity::getName)

类型参数:: T - 泛型
参数:: columns - 方法引用
返回:: QueryOperator

selectExcludes
```
public abstract QueryOperator selectExcludes(Collection<String> columns)
```
指定忽略查询的列

参数:

columns - 列名

返回:

QueryOperator

selectExcludes
```
public QueryOperator selectExcludes(String... columns)
```
指定忽略查询的列

参数:

columns - 列名

返回:

QueryOperator

selectExcludes

@SafeVarargs
public final <T> QueryOperator selectExcludes(StaticMethodReferenceColumn<T>... columns)

使用静态方法引用来指定不查询的列


     selectExcludes(UserEntity::getId,UserEntity::getName)

类型参数:: T - 泛型
参数:: columns - 方法引用
返回:: QueryOperator

where

public abstract QueryOperator where(java.util.function.Consumer<Conditional<?>> conditionalConsumer)

通过回调函数来指定where条件

     where(dsl->dsl.and("name","name"))

参数:: conditionalConsumer - conditionalConsumer
返回:: QueryOperator

where
```
public abstract QueryOperator where(Term term)
```
添加过滤条件

参数:

term - term

返回:

QueryOperator

where
```
public abstract QueryOperator where(Collection<Term> terms)
```
添加多个过滤条件

参数:

terms - 过滤条件

返回:

QueryOperator

setParam
```
public abstract QueryOperator setParam(QueryParam param)
```
通过QueryParam来设置查询

参数:

param - param

返回:

QueryOperator

另请参阅:

Param.getTerms(), QueryParam.getContext(), QueryParam.getSorts(), QueryParam.getPageSize(), QueryParam.getPageIndex()

where
```
public final QueryOperator where(TermSupplier... condition)
```
根据TermSupplier来添加过滤条件

参数:

condition - TermSupplier

返回:

QueryOperator

join
```
public abstract QueryOperator join(Join... on)
```
表关联操作

参数:

on - Join

返回:

QueryOperator

另请参阅:

Joins

join

@SafeVarargs
public final QueryOperator join(java.util.function.Supplier<Join>... on)

表关联操作

参数:: on - Join
返回:: QueryOperator
另请参阅:: Joins

leftJoin

public final QueryOperator leftJoin(String target,
                                    java.util.function.Consumer<JoinOperator> joinOperatorConsumer)

innerJoin

public final QueryOperator innerJoin(String target,
                                     java.util.function.Consumer<JoinOperator> joinOperatorConsumer)

rightJoin

public final QueryOperator rightJoin(String target,
                                     java.util.function.Consumer<JoinOperator> joinOperatorConsumer)

fullJoin

public final QueryOperator fullJoin(String target,
                                    java.util.function.Consumer<JoinOperator> joinOperatorConsumer)

orderBy

public final QueryOperator orderBy(SortOrderSupplier... operators)

orderBy

public abstract QueryOperator orderBy(SortOrder... operators)

groupBy

public abstract QueryOperator groupBy(Operator<SelectColumn>... operators)

having

public abstract QueryOperator having(Operator<?>... operators)

paging

public abstract QueryOperator paging(int pageIndex,
                                     int pageSize)

forUpdate

public abstract QueryOperator forUpdate()

context

public abstract QueryOperator context(Map<String,Object> context)

getSql
```
public abstract SqlRequest getSql()
```
获取SQL请求

返回:

获取SQL请求

fetch
```
public abstract <E,R> QueryResultOperator<E,R> fetch(ResultWrapper<E,R> wrapper)
```
执行查询操作

类型参数:

E - 行类型

R - 结果类型

参数:

wrapper - 查询结果包装器

返回:

查询结果

另请参阅:

ResultWrappers

clone
```
public abstract QueryOperator clone()
```
覆盖:

clone 在类中 Object

类 QueryOperator

嵌套类概要

从接口继承的嵌套类/接口 org.hswebframework.ezorm.core.TermTypeConditionalSupport

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 org.hswebframework.ezorm.core.LogicalOperation

构造器详细资料

QueryOperator

方法详细资料

select

select

select

select

select

select

selectExcludes

selectExcludes

selectExcludes

where

where

where

setParam

where

join

join

leftJoin

innerJoin

rightJoin

fullJoin

orderBy

orderBy

groupBy

having

paging

forUpdate

context

getSql

fetch

clone