online.sanen.unabo.nosql

接口 QueryTable

所有已知实现类:

QueryTableMongodb

public interface QueryTable

方法概要

限定符和类型	方法和说明
QueryTable	addCondition(Condition cond)
QueryTable	addCondition(Consumer<List<Condition>> conds)
QueryTable	alias(Map<String,String> alias)
int	clear() Clear the table
int	copyTo(String newTableName)
int	count()
void	createView(String viewName)
int	delete() Condition deletion, if no condition, is equivalent to clearing the table.
int	drop() Delete table
void	dropColumn(String column)
<T> List<T>	entities(Class<T> cls)
boolean	isExsites() Determine whether the table exists.
QueryTable	limit(Integer... args) This is a extraction function limit(0,10) This method is usually followed by a maps() or list() method Different databases will have different implementations, so refer to the database functions you're currently using, and if you don't support limit, you'll default to pulling the corresponding result set from the result set
<T> List<T>	list() If you need to return a result set instead of a single item; The return type is automatically determined by the constructor.
<T> List<T>	list(Class<T> cls)
<T extends Map<String,Object>> Optional<T>	map()
<T extends Map<String,Object>> List<T>	maps()
<T extends Map<String,Object>> List<T>	maps(Map<String,String> alias)
int	rename(String newName) Modify table name
QueryTable	setExceptFields(String... fields) All other fields are involved
QueryTable	setFields(List<String> fields)
QueryTable	setFields(String... fields) Sets the fields that participate in the operation, with the highest priority to override the fields of the entity class
QueryTable	sort(Sorts sorts, String... fields) To add sorting
void	stream(int buffersize, Consumer<List<? extends Map<String,Object>>> consumer)
<T> Optional<T>	unique() Returns a single result;The return type is automatically determined based on the constructor, and if you want to return an entity type, add before that or use unique(Class)
<T> Optional<T>	unique(Class<T> cls) Returns a single result;The return type is automatically determined based on the constructor

方法详细资料

addCondition

QueryTable addCondition(Condition cond)

addCondition

QueryTable addCondition(Consumer<List<Condition>> conds)

alias

QueryTable alias(Map<String,String> alias)

setFields

QueryTable setFields(String... fields)

Sets the fields that participate in the operation, with the highest priority to override the fields of the entity class

参数:

fields -

返回:

setFields

QueryTable setFields(List<String> fields)

setExceptFields

QueryTable setExceptFields(String... fields)

All other fields are involved

参数:

fields -

返回:

sort

QueryTable sort(Sorts sorts,
                String... fields)

To add sorting

参数:

sorts -

fields -

返回:

unique

<T> Optional<T> unique()

Returns a single result;The return type is automatically determined based on the constructor, and if you want to return an entity type, add before that or use unique(Class)

返回:

unique

<T> Optional<T> unique(Class<T> cls)

Returns a single result;The return type is automatically determined based on the constructor

返回:

list

<T> List<T> list()

If you need to return a result set instead of a single item; The return type is automatically determined by the constructor. If you want to return an entity type, add the entity type before the list(Class) method

The method is equivalent to the integrator of two methods

另请参阅:

entities(Class), maps()

list

<T> List<T> list(Class<T> cls)

entities

<T> List<T> entities(Class<T> cls)

返回:

Returns a collection of entity class mappings.

map

<T extends Map<String,Object>> Optional<T> map()

maps

<T extends Map<String,Object>> List<T> maps()

返回:

Returns the result set key pair.

maps

<T extends Map<String,Object>> List<T> maps(Map<String,String> alias)

参数:

alias - - Aliased key-value pairs, returned as aliased key-value if matched

返回:

从以下版本开始:

2.24

stream

void stream(int buffersize,
            Consumer<List<? extends Map<String,Object>>> consumer)

limit

QueryTable limit(Integer... args)

This is a extraction function

limit(0,10)

This method is usually followed by a maps() or list() method

Different databases will have different implementations, so refer to the database functions you're currently using, and if you don't support limit, you'll default to pulling the corresponding result set from the result set

参数:

args - - If you're using MYSQL or ORACLE or SQLITE you can go to limit(0,100), if you're using SQLSERVER you'll go to limit(100) and it'll convert to top 100

返回:

QueryTable

delete

int delete()

Condition deletion, if no condition, is equivalent to clearing the table.

返回:

isExsites

boolean isExsites()

Determine whether the table exists.

返回:

clear

int clear()

Clear the table

返回:

drop

int drop()

Delete table

返回:

rename

int rename(String newName)

Modify table name

参数:

newName -

返回:

copyTo

int copyTo(String newTableName)

参数:

newTableName -

返回:

count

int count()

dropColumn

void dropColumn(String column)

createView

void createView(String viewName)