程序包 com.mysql.cj.protocol

接口 ColumnDefinition

所有超级接口:

ProtocolEntity

所有已知子接口:

CachedResultSetMetaData

所有已知实现类:

CachedResultSetMetaDataImpl, DefaultColumnDefinition

public interface ColumnDefinition
extends ProtocolEntity

Represents protocol specific result set metadata, eg., for native protocol, Protocol::ColumnDefinition41 protocol entity.

方法概要

修饰符和类型	方法	说明
void	buildIndexMapping()	Builds a hash between column names and their indices for fast retrieval.
void	exportTo(ColumnDefinition columnDefinition)
int	findColumn(String columnName, boolean useColumnNamesInFindColumn, int indexBase)
Map<String,Integer>	getColumnLabelToIndex()
Map<String,Integer>	getColumnNameToIndex()
Map<String,Integer>	getColumnToIndexCache()
Field[]	getFields()
Map<String,Integer>	getFullColumnNameToIndex()
boolean	hasBuiltIndexMapping()
boolean	hasLargeFields()	Check if fields with type BLOB, MEDIUMBLOB, LONGBLOB, TEXT, MEDIUMTEXT or LONGTEXT exist in this ColumnDefinition.
void	initializeFrom(ColumnDefinition columnDefinition)
void	setColumnLabelToIndex(Map<String,Integer> columnLabelToIndex)
void	setColumnNameToIndex(Map<String,Integer> colNameToIndex)
void	setColumnToIndexCache(Map<String,Integer> columnToIndexCache)
void	setFields(Field[] fields)
void	setFullColumnNameToIndex(Map<String,Integer> fullColNameToIndex)

方法详细资料

getFields

Field[] getFields()

setFields

void setFields(Field[] fields)

buildIndexMapping

void buildIndexMapping()

Builds a hash between column names and their indices for fast retrieval. This is done lazily to support findColumn() and get*(String), as it can be more expensive than just retrieving result set values by ordinal index.

hasBuiltIndexMapping

boolean hasBuiltIndexMapping()

getColumnLabelToIndex

Map<String,Integer> getColumnLabelToIndex()

setColumnLabelToIndex

void setColumnLabelToIndex(Map<String,Integer> columnLabelToIndex)

getFullColumnNameToIndex

Map<String,Integer> getFullColumnNameToIndex()

setFullColumnNameToIndex

void setFullColumnNameToIndex(Map<String,Integer> fullColNameToIndex)

getColumnNameToIndex

Map<String,Integer> getColumnNameToIndex()

setColumnNameToIndex

void setColumnNameToIndex(Map<String,Integer> colNameToIndex)

getColumnToIndexCache

Map<String,Integer> getColumnToIndexCache()

setColumnToIndexCache

void setColumnToIndexCache(Map<String,Integer> columnToIndexCache)

initializeFrom

void initializeFrom(ColumnDefinition columnDefinition)

exportTo

void exportTo(ColumnDefinition columnDefinition)

findColumn

int findColumn(String columnName,
               boolean useColumnNamesInFindColumn,
               int indexBase)

hasLargeFields

boolean hasLargeFields()

Check if fields with type BLOB, MEDIUMBLOB, LONGBLOB, TEXT, MEDIUMTEXT or LONGTEXT exist in this ColumnDefinition.

返回:

true if fields with type BLOB, MEDIUMBLOB, LONGBLOB, TEXT, MEDIUMTEXT or LONGTEXT exist in this ColumnDefinition.