Package org.aoju.bus.pager.parser

Class CountSqlParser

java.lang.Object

org.aoju.bus.pager.parser.CountSqlParser

public class CountSqlParser
extends Object

sql解析类,提供更智能的count查询sql

Since:

Java 17+

Author:

Kimi Liu

Field Summary

Fields

Modifier and Type	Field	Description
static final String	KEEP_ORDERBY

Constructor Summary

Constructors

Constructor	Description
CountSqlParser()
CountSqlParser(JSqlParser jSqlParser)

Method Summary

Modifier and Type	Method	Description
static void	addAggregateFunctions(String functions)	添加到聚合函数,可以是逗号隔开的多个函数前缀
String	getSimpleCountSql(String sql)	获取普通的Count-sql
String	getSimpleCountSql(String sql, String name)	获取普通的Count-sql
String	getSmartCountSql(String sql)	获取智能的countSql
String	getSmartCountSql(String sql, String column)	获取智能的countSql
boolean	isSimpleCount(net.sf.jsqlparser.statement.select.PlainSelect select)	是否可以用简单的count查询方式
boolean	orderByHashParameters(List<net.sf.jsqlparser.statement.select.OrderByElement> orderByElements)	判断Orderby是否包含参数,有参数的不能去
void	processFromItem(net.sf.jsqlparser.statement.select.FromItem fromItem)	处理子查询
void	processPlainSelect(net.sf.jsqlparser.statement.select.PlainSelect plainSelect)	处理PlainSelect类型的selectBody
void	processSelectBody(net.sf.jsqlparser.statement.select.SelectBody selectBody)	处理selectBody去除Order by
void	processWithItemsList(List<net.sf.jsqlparser.statement.select.WithItem> withItemsList)	处理WithItem
void	sqlToCount(net.sf.jsqlparser.statement.select.Select select, String name)	将sql转换为count查询

Methods inherited from class java.lang.Object

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

Field Details

KEEP_ORDERBY

public static final String KEEP_ORDERBY

See Also:

• Constant Field Values

Constructor Details

CountSqlParser

public CountSqlParser()

CountSqlParser

public CountSqlParser(JSqlParser jSqlParser)

Method Details

addAggregateFunctions

public static void addAggregateFunctions(String functions)

添加到聚合函数,可以是逗号隔开的多个函数前缀

Parameters:

functions - 函数

getSmartCountSql

public String getSmartCountSql(String sql)

获取智能的countSql

Parameters:

sql - sql

Returns:

the string

getSmartCountSql

public String getSmartCountSql(String sql,
 String column)

获取智能的countSql

Parameters:

sql - sql

column - 列名,默认 0

Returns:

the string

getSimpleCountSql

public String getSimpleCountSql(String sql)

获取普通的Count-sql

Parameters:

sql - 原查询sql

Returns:

返回count查询sql

getSimpleCountSql

public String getSimpleCountSql(String sql,
 String name)

获取普通的Count-sql

Parameters:

sql - 原查询sql

name - 名称

Returns:

返回count查询sql

sqlToCount

public void sqlToCount(net.sf.jsqlparser.statement.select.Select select,
 String name)

将sql转换为count查询

Parameters:

select - 查询

name - 名称

isSimpleCount

public boolean isSimpleCount(net.sf.jsqlparser.statement.select.PlainSelect select)

是否可以用简单的count查询方式

Parameters:

select - 查询

Returns:

the boolean

processSelectBody

public void processSelectBody(net.sf.jsqlparser.statement.select.SelectBody selectBody)

处理selectBody去除Order by

Parameters:

selectBody - 查询信息

processPlainSelect

public void processPlainSelect(net.sf.jsqlparser.statement.select.PlainSelect plainSelect)

处理PlainSelect类型的selectBody

Parameters:

plainSelect - 计划查询

processWithItemsList

public void processWithItemsList(List<net.sf.jsqlparser.statement.select.WithItem> withItemsList)

处理WithItem

Parameters:

withItemsList - WithItem

processFromItem

public void processFromItem(net.sf.jsqlparser.statement.select.FromItem fromItem)

处理子查询

Parameters:

fromItem - FromItem

orderByHashParameters

public boolean orderByHashParameters(List<net.sf.jsqlparser.statement.select.OrderByElement> orderByElements)

判断Orderby是否包含参数,有参数的不能去

Parameters:

orderByElements - OrderByElement

Returns:

the boolean