com.taobao.tddl.dbsync.binlog.event

类 TableMapLogEvent

java.lang.Object

com.taobao.tddl.dbsync.binlog.LogEvent

com.taobao.tddl.dbsync.binlog.event.TableMapLogEvent

public final class TableMapLogEvent
extends LogEvent

In row-based mode, every row operation event is preceded by a Table_map_log_event which maps a table definition to a number. The table definition consists of database name, table name, and column definitions. The Post-Header has the following components:

Post-Header for Table_map_log_event

Name	Format	Description
table_id	6 bytes unsigned integer	The number that identifies the table.
flags	2 byte bitfield	Reserved for future use; currently always 0.

The Body has the following components:

Body for Table_map_log_event

Name	Format	Description
database_name	one byte string length, followed by null-terminated string	The name of the database in which the table resides. The name is represented as a one byte unsigned integer representing the number of bytes in the name, followed by length bytes containing the database name, followed by a terminating 0 byte. (Note the redundancy in the representation of the length.)
table_name	one byte string length, followed by null-terminated string	The name of the table, encoded the same way as the database name above.
column_count	packed_integer "Packed Integer"	The number of columns in the table, represented as a packed variable-length integer.
column_type	List of column_count 1 byte enumeration values	The type of each column in the table, listed from left to right. Each byte is mapped to a column type according to the enumeration type enum_field_types defined in mysql_com.h. The mapping of types to numbers is listed in the table Table_table_map_log_event_column_types "below" (along with description of the associated metadata field).
metadata_length	packed_integer "Packed Integer"	The length of the following metadata block
metadata	list of metadata for each column	For each column from left to right, a chunk of data who's length and semantics depends on the type of the column. The length and semantics for the metadata for each column are listed in the table Table_table_map_log_event_column_types "below".
null_bits	column_count bits, rounded up to nearest byte	For each column, a bit indicating whether data in the column can be NULL or not. The number of bytes needed for this is int((column_count+7)/8). The flag for the first column from the left is in the least-significant bit of the first byte, the second is in the second least significant bit of the first byte, the ninth is in the least significant bit of the second byte, and so on.
optional metadata fields	optional metadata fields are stored in Type, Length, Value(TLV) format. Type takes 1 byte. Length is a packed integer value. Values takes Length bytes.	There are some optional metadata defined. They are listed in the table 版本: 1.0 作者: Changyuan.lh 嵌套类概要 嵌套类 限定符和类型 类和说明 static class TableMapLogEvent.ColumnInfo Holding mysql column information. 字段概要 字段 限定符和类型 字段和说明 static int COLUMN_CHARSET static int COLUMN_NAME protected int columnCnt protected TableMapLogEvent.ColumnInfo[] columnInfo protected java.lang.String dbname Fixed data part: 6 bytes. static int DEFAULT_CHARSET static int ENUM_STR_VALUE static int GEOMETRY_TYPE protected java.util.BitSet nullBits static int PRIMARY_KEY_WITH_PREFIX static int SET_STR_VALUE static int SIGNEDNESS static int SIMPLE_PRIMARY_KEY protected long tableId protected java.lang.String tblname static int TM_FLAGS_OFFSET static int TM_MAPID_OFFSET TM = "Table Map" 从类继承的字段 com.taobao.tddl.dbsync.binlog.LogEvent ANNOTATE_ROWS_EVENT, ANONYMOUS_GTID_LOG_EVENT, APPEND_BLOCK_EVENT, BEGIN_LOAD_QUERY_EVENT, BINLOG_CHECKPOINT_EVENT, BINLOG_CHECKSUM_ALG_CRC32, BINLOG_CHECKSUM_ALG_DESC_LEN, BINLOG_CHECKSUM_ALG_ENUM_END, BINLOG_CHECKSUM_ALG_OFF, BINLOG_CHECKSUM_ALG_UNDEF, BINLOG_CHECKSUM_LEN, BINLOG_VERSION, CHECKSUM_CRC32_SIGNATURE_LEN, CREATE_FILE_EVENT, DELETE_FILE_EVENT, DELETE_ROWS_EVENT, DELETE_ROWS_EVENT_V1, ENUM_END_EVENT, EVENT_LEN_OFFSET, EVENT_TYPE_OFFSET, EXEC_LOAD_EVENT, EXECUTE_LOAD_QUERY_EVENT, EXTRA_ROW_INFO_FORMAT_OFFSET, EXTRA_ROW_INFO_HDR_BYTES, EXTRA_ROW_INFO_LEN_OFFSET, EXTRA_ROW_INFO_MAX_PAYLOAD, FLAGS_OFFSET, FORMAT_DESCRIPTION_EVENT, GTID_EVENT, GTID_LIST_EVENT, GTID_LOG_EVENT, header, HEARTBEAT_LOG_EVENT, IGNORABLE_LOG_EVENT, INCIDENT_EVENT, INTVAR_EVENT, LOAD_EVENT, LOG_EVENT_IGNORABLE_F, LOG_POS_OFFSET, logger, MARIA_EVENTS_BEGIN, MARIA_SLAVE_CAPABILITY_ANNOTATE, MARIA_SLAVE_CAPABILITY_BINLOG_CHECKPOINT, MARIA_SLAVE_CAPABILITY_GTID, MARIA_SLAVE_CAPABILITY_MINE, MARIA_SLAVE_CAPABILITY_TOLERATE_HOLES, MARIA_SLAVE_CAPABILITY_UNKNOWN, MYSQL_EVENTS_END, MYSQL_TYPE_BIT, MYSQL_TYPE_BLOB, MYSQL_TYPE_DATE, MYSQL_TYPE_DATETIME, MYSQL_TYPE_DATETIME2, MYSQL_TYPE_DECIMAL, MYSQL_TYPE_DOUBLE, MYSQL_TYPE_ENUM, MYSQL_TYPE_FLOAT, MYSQL_TYPE_GEOMETRY, MYSQL_TYPE_INT24, MYSQL_TYPE_JSON, MYSQL_TYPE_LONG, MYSQL_TYPE_LONG_BLOB, MYSQL_TYPE_LONGLONG, MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_NEWDATE, MYSQL_TYPE_NEWDECIMAL, MYSQL_TYPE_NULL, MYSQL_TYPE_SET, MYSQL_TYPE_SHORT, MYSQL_TYPE_STRING, MYSQL_TYPE_TIME, MYSQL_TYPE_TIME2, MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_TIMESTAMP2, MYSQL_TYPE_TINY, MYSQL_TYPE_TINY_BLOB, MYSQL_TYPE_VAR_STRING, MYSQL_TYPE_VARCHAR, MYSQL_TYPE_YEAR, NEW_LOAD_EVENT, PARTIAL_UPDATE_ROWS_EVENT, PRE_GA_DELETE_ROWS_EVENT, PRE_GA_UPDATE_ROWS_EVENT, PRE_GA_WRITE_ROWS_EVENT, PREVIOUS_GTIDS_LOG_EVENT, QUERY_EVENT, QUERY_HEADER_LEN, QUERY_HEADER_MINIMAL_LEN, RAND_EVENT, ROTATE_EVENT, ROWS_QUERY_LOG_EVENT, semival, SERVER_ID_OFFSET, SERVER_VERSION, SLAVE_EVENT, START_ENCRYPTION_EVENT, START_EVENT_V3, STOP_EVENT, TABLE_MAP_EVENT, TRANSACTION_CONTEXT_EVENT, UNKNOWN_EVENT, UPDATE_ROWS_EVENT, UPDATE_ROWS_EVENT_V1, USER_VAR_EVENT, VIEW_CHANGE_EVENT, WRITE_ROWS_EVENT, WRITE_ROWS_EVENT_V1, XA_PREPARE_LOG_EVENT, XID_EVENT 构造器概要 构造器 构造器和说明 TableMapLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent) Constructor used by slave to read the event from the binary log. 方法概要 限定符和类型 方法和说明 int getColumnCnt() TableMapLogEvent.ColumnInfo[] getColumnInfo() java.lang.String getDbName() long getTableId() java.lang.String getTableName() boolean isExistOptionalMetaData() void setExistOptionalMetaData(boolean existOptional) 从类继承的方法 com.taobao.tddl.dbsync.binlog.LogEvent getEventLen, getHeader, getLogPos, getSemival, getServerId, getTypeName, getWhen, setSemival 从类继承的方法 java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait 字段详细资料 dbname protected final java.lang.String dbname Fixed data part: 6 bytes. The table ID. 2 bytes. Reserved for future use. Variable data part: 1 byte. The length of the database name. Variable-sized. The database name (null-terminated). 1 byte. The length of the table name. Variable-sized. The table name (null-terminated). Packed integer. The number of columns in the table. Variable-sized. An array of column types, one byte per column. Packed integer. The length of the metadata block. Variable-sized. The metadata block; see log_event.h for contents and format. Variable-sized. Bit-field indicating whether each column can be NULL, one bit per column. For this field, the amount of storage required for N columns is INT((N+7)/8) bytes. Source : http://forge.mysql.com/wiki/MySQL_Internals_Binary_Log tblname protected final java.lang.String tblname columnCnt protected final int columnCnt columnInfo protected final TableMapLogEvent.ColumnInfo[] columnInfo tableId protected final long tableId nullBits protected java.util.BitSet nullBits TM_MAPID_OFFSET public static final int TM_MAPID_OFFSET TM = "Table Map" 另请参阅: 常量字段值 TM_FLAGS_OFFSET public static final int TM_FLAGS_OFFSET 另请参阅: 常量字段值 SIGNEDNESS public static final int SIGNEDNESS 另请参阅: 常量字段值 DEFAULT_CHARSET public static final int DEFAULT_CHARSET 另请参阅: 常量字段值 COLUMN_CHARSET public static final int COLUMN_CHARSET 另请参阅: 常量字段值 COLUMN_NAME public static final int COLUMN_NAME 另请参阅: 常量字段值 SET_STR_VALUE public static final int SET_STR_VALUE 另请参阅: 常量字段值 ENUM_STR_VALUE public static final int ENUM_STR_VALUE 另请参阅: 常量字段值 GEOMETRY_TYPE public static final int GEOMETRY_TYPE 另请参阅: 常量字段值 SIMPLE_PRIMARY_KEY public static final int SIMPLE_PRIMARY_KEY 另请参阅: 常量字段值 PRIMARY_KEY_WITH_PREFIX public static final int PRIMARY_KEY_WITH_PREFIX 另请参阅: 常量字段值 构造器详细资料 TableMapLogEvent public TableMapLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent) Constructor used by slave to read the event from the binary log. 方法详细资料 getDbName public final java.lang.String getDbName() getTableName public final java.lang.String getTableName() getColumnCnt public final int getColumnCnt() getColumnInfo public final TableMapLogEvent.ColumnInfo[] getColumnInfo() getTableId public final long getTableId() isExistOptionalMetaData public boolean isExistOptionalMetaData() setExistOptionalMetaData public void setExistOptionalMetaData(boolean existOptional) 跳过导航链接 概览 程序包 类 使用 树 已过时 索引 帮助 上一个类 下一个类 框架 无框架 所有类 概要: 嵌套 | 字段 | 构造器 | 方法 详细资料: 字段 | 构造器 | 方法 Copyright © 2019. 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