程序包 com.mysql.cj.xdevapi

类 DocFilterParams

java.lang.Object

com.mysql.cj.xdevapi.AbstractFilterParams

com.mysql.cj.xdevapi.DocFilterParams

所有已实现的接口:

FilterParams

public class DocFilterParams
extends AbstractFilterParams

FilterParams implementation for Collection syntax.

嵌套类概要

从接口继承的嵌套类/接口 com.mysql.cj.xdevapi.FilterParams

FilterParams.RowLock, FilterParams.RowLockOptions

字段概要

从类继承的字段 com.mysql.cj.xdevapi.AbstractFilterParams

args, collection, criteriaStr, fields, groupBy, isRelational, limit, lock, lockOption, offset, orderExpr, projection, supportsOffset

构造器概要

构造器

构造器	说明
DocFilterParams(String schemaName, String collectionName)	Constructor.
DocFilterParams(String schemaName, String collectionName, boolean supportsOffset)	Constructor.

方法概要

修饰符和类型	方法	说明
void	setFields(Expression docProjection)	Parse projection expressions into X Protocol Projection objects.
void	setFields(String... projection)	Parse projection expressions into X Protocol Projection objects.

从类继承的方法 com.mysql.cj.xdevapi.AbstractFilterParams

addArg, clearArgs, getArgs, getCollection, getCriteria, getFields, getGrouping, getGroupingCriteria, getLimit, getLock, getLockOption, getOffset, getOrder, isRelational, setCriteria, setGrouping, setGroupingCriteria, setLimit, setLock, setLockOption, setOffset, setOrder, supportsOffset, verifyAllArgsBound

从类继承的方法 java.lang.Object

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

构造器详细资料

DocFilterParams

public DocFilterParams(String schemaName,
                       String collectionName)

Constructor.

参数:

schemaName - Schema name

collectionName - Collection name

DocFilterParams

public DocFilterParams(String schemaName,
                       String collectionName,
                       boolean supportsOffset)

Constructor.

参数:

schemaName - Schema name

collectionName - Collection name

supportsOffset - Whether OFFSET is supported or not

方法详细资料

setFields

public void setFields(Expression docProjection)

Parse projection expressions into X Protocol Projection objects.

参数:

docProjection - projection expression

setFields

public void setFields(String... projection)

从接口复制的说明: FilterParams

Parse projection expressions into X Protocol Projection objects.

 collection.find().fields("CAST($.x as SIGNED) as x").execute();
 table.select("_id, name, birthday, age").execute();
 table.select("age as age_group, count(name) as cnt, something").execute();
 

指定者:

setFields 在接口中 FilterParams

指定者:

setFields 在类中 AbstractFilterParams

参数:

projection - projection expression