Package org.miaixz.bus.pager.parser.defaults

Class DefaultCountSqlParser

java.lang.Object

org.miaixz.bus.pager.parser.defaults.DefaultCountSqlParser

All Implemented Interfaces:

CountSqlParser

public class DefaultCountSqlParser
extends Object
implements CountSqlParser

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
protected final Set<String>	falseFunctions
static final String	KEEP_ORDERBY
protected final Set<String>	skipFunctions
protected static final net.sf.jsqlparser.expression.Alias	TABLE_ALIAS

Fields inherited from interface org.miaixz.bus.pager.parser.CountSqlParser

AGGREGATE_FUNCTIONS

Constructor Summary

Constructors

Constructor	Description
DefaultCountSqlParser()

Method Summary

Modifier and Type	Method	Description
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, String countColumn)	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
protected boolean	keepOrderBy()	保留 order by
protected boolean	keepSubSelectOrderBy()	保留子查询 order by
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	processSelect(net.sf.jsqlparser.statement.select.Select select)	处理selectBody去除Order by
void	processWithItemsList(List<net.sf.jsqlparser.statement.select.WithItem> withItemsList)	处理WithItem
net.sf.jsqlparser.statement.select.Select	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

Methods inherited from interface org.miaixz.bus.pager.parser.CountSqlParser

getSmartCountSql

Field Details

KEEP_ORDERBY

public static final String KEEP_ORDERBY

See Also:

• Constant Field Values

TABLE_ALIAS

protected static final net.sf.jsqlparser.expression.Alias TABLE_ALIAS

skipFunctions

protected final Set<String> skipFunctions

falseFunctions

protected final Set<String> falseFunctions

Constructor Details

DefaultCountSqlParser

public DefaultCountSqlParser()

Method Details

getSmartCountSql

public String getSmartCountSql(String sql,
 String countColumn)

获取智能的countSql

Specified by:

getSmartCountSql in interface CountSqlParser

Parameters:

sql - sql

countColumn - 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 net.sf.jsqlparser.statement.select.Select sqlToCount(net.sf.jsqlparser.statement.select.Select select,
 String name)

将sql转换为count查询

Parameters:

select - 原查询sql

name - 名称

Returns:

返回count查询sql

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

processSelect

public void processSelect(net.sf.jsqlparser.statement.select.Select select)

处理selectBody去除Order by

Parameters:

select - 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

keepOrderBy

protected boolean keepOrderBy()

保留 order by

keepSubSelectOrderBy

protected boolean keepSubSelectOrderBy()

保留子查询 order by

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