LoadLogEvent (common-binlog 3.1.0 API)

java.lang.Object
- net.wicp.tams.common.binlog.parser.LogEvent
- - net.wicp.tams.common.binlog.parser.event.LoadLogEvent

直接已知子类:: CreateFileLogEvent

public class LoadLogEvent
extends LogEvent

This log event corresponds to a "LOAD DATA INFILE" SQL query on the following form:

    (1)    USE db;
    (2)    LOAD DATA [CONCURRENT] [LOCAL] INFILE 'file_name'
    (3)    [REPLACE | IGNORE]
    (4)    INTO TABLE 'table_name'
    (5)    [FIELDS
    (6)      [TERMINATED BY 'field_term']
    (7)      [[OPTIONALLY] ENCLOSED BY 'enclosed']
    (8)      [ESCAPED BY 'escaped']
    (9)    ]
   (10)    [LINES
   (11)      [TERMINATED BY 'line_term']
   (12)      [LINES STARTING BY 'line_start']
   (13)    ]
   (14)    [IGNORE skip_lines LINES]
   (15)    (field_1, field_2, ..., field_n)

Binary Format: The Post-Header consists of the following six components.

Post-Header for Load_log_event
Name	Format	Description
slave_proxy_id	4 byte unsigned integer	An integer identifying the client thread that issued the query. The id is unique per server. (Note, however, that two threads on different servers may have the same slave_proxy_id.) This is used when a client thread creates a temporary table local to the client. The slave_proxy_id is used to distinguish temporary tables that belong to different clients.
exec_time	4 byte unsigned integer	The time from when the query started to when it was logged in the binlog, in seconds.
skip_lines	4 byte unsigned integer	The number on line (14) above, if present, or 0 if line (14) is left out.
table_name_len	1 byte unsigned integer	The length of 'table_name' on line (4) above.
db_len	1 byte unsigned integer	The length of 'db' on line (1) above.
num_fields	4 byte unsigned integer	The number n of fields on line (15) above.

The Body contains the following components.

Body of Load_log_event
Name	Format	Description
sql_ex	variable length	Describes the part of the query on lines (3) and (5)–(13) above. More precisely, it stores the five strings (on lines) field_term (6), enclosed (7), escaped (8), line_term (11), and line_start (12); as well as a bitfield indicating the presence of the keywords REPLACE (3), IGNORE (3), and OPTIONALLY (7). The data is stored in one of two formats, called "old" and "new". The type field of Common-Header determines which of these two formats is used: type LOAD_EVENT means that the old format is used, and type NEW_LOAD_EVENT means that the new format is used. When MySQL writes a Load_log_event, it uses the new format if at least one of the five strings is two or more bytes long. Otherwise (i.e., if all strings are 0 or 1 bytes long), the old format is used. The new and old format differ in the way the five strings are stored. In the new format, the strings are stored in the order field_term, enclosed, escaped, line_term, line_start. Each string consists of a length (1 byte), followed by a sequence of characters (0-255 bytes). Finally, a boolean combination of the following flags is stored in 1 byte: REPLACE_FLAG==0x4, IGNORE_FLAG==0x8, and OPT_ENCLOSED_FLAG==0x2. If a flag is set, it indicates the presence of the corresponding keyword in the SQL query. In the old format, we know that each string has length 0 or 1. Therefore, only the first byte of each string is stored. The order of the strings is the same as in the new format. These five bytes are followed by the same 1 byte bitfield as in the new format. Finally, a 1 byte bitfield called empty_flags is stored. The low 5 bits of empty_flags indicate which of the five strings have length 0. For each of the following flags that is set, the corresponding string has length 0; for the flags that are not set, the string has length 1: FIELD_TERM_EMPTY==0x1, ENCLOSED_EMPTY==0x2, LINE_TERM_EMPTY==0x4, LINE_START_EMPTY==0x8, ESCAPED_EMPTY==0x10. Thus, the size of the new format is 6 bytes + the sum of the sizes of the five strings. The size of the old format is always 7 bytes.
field_lens	num_fields 1 byte unsigned integers	An array of num_fields integers representing the length of each field in the query. (num_fields is from the Post-Header).
fields	num_fields null-terminated strings	An array of num_fields null-terminated strings, each representing a field in the query. (The trailing zero is redundant, since the length are stored in the num_fields array.) The total length of all strings equals to the sum of all field_lens, plus num_fields bytes for all the trailing zeros.
table_name	null-terminated string of length table_len+1 bytes	The 'table_name' from the query, as a null-terminated string. (The trailing zero is actually redundant since the table_len is known from Post-Header.)
db	null-terminated string of length db_len+1 bytes	The 'db' from the query, as a null-terminated string. (The trailing zero is actually redundant since the db_len is known from Post-Header.)
file_name	variable length string without trailing zero, extending to the end of the event (determined by the length field of the Common-Header)	The 'file_name' from the query.

This event type is understood by current versions, but only generated by MySQL 3.23 and earlier.

字段概要

字段
限定符和类型	字段和说明
`static int`	`DUMPFILE_FLAG`
`static int`	`ENCLOSED_EMPTY`
`static int`	`ESCAPED_EMPTY`
`static int`	`FIELD_TERM_EMPTY`
`static int`	`IGNORE_FLAG`
`static int`	`L_DATA_OFFSET`
`static int`	`L_DB_LEN_OFFSET`
`static int`	`L_EXEC_TIME_OFFSET`
`static int`	`L_NUM_FIELDS_OFFSET`
`static int`	`L_SKIP_LINES_OFFSET`
`static int`	`L_SQL_EX_OFFSET`
`static int`	`L_TBL_LEN_OFFSET`
`static int`	`L_THREAD_ID_OFFSET`
`static int`	`LINE_START_EMPTY`
`static int`	`LINE_TERM_EMPTY`
`static int`	`OPT_ENCLOSED_FLAG`
`static int`	`REPLACE_FLAG`

从类继承的字段 net.wicp.tams.common.binlog.parser.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, 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, SERVER_ID_OFFSET, SERVER_VERSION, SLAVE_EVENT, START_EVENT_V3, STOP_EVENT, TABLE_MAP_EVENT, UNKNOWN_EVENT, UPDATE_ROWS_EVENT, UPDATE_ROWS_EVENT_V1, USER_VAR_EVENT, WRITE_ROWS_EVENT, WRITE_ROWS_EVENT_V1, XID_EVENT

构造器概要

构造器
构造器和说明

LoadLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent)

构造器
构造器和说明
`LoadLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`protected void`	`copyLogEvent(LogBuffer buffer, int bodyOffset, FormatDescriptionLogEvent descriptionEvent)`
`String`	`getDb()`
`int`	`getEmptyFlags()`
`String`	`getEnclosed()`
`String`	`getEscaped()`
`long`	`getExecTime()`
`String[]`	`getFields()`
`String`	`getFieldTerm()`
`String`	`getFname()`
`String`	`getLineStart()`
`String`	`getLineTerm()`
`int`	`getOptFlags()`
`int`	`getSkipLines()`
`String`	`getTable()`

从类继承的方法 net.wicp.tams.common.binlog.parser.LogEvent
getEventLen, getHeader, getLogPos, getServerId, getTypeName, getWhen

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
- L_THREAD_ID_OFFSET
```
public static final int L_THREAD_ID_OFFSET
```
  另请参阅:
  
  常量字段值
- L_EXEC_TIME_OFFSET
```
public static final int L_EXEC_TIME_OFFSET
```
  另请参阅:
  
  常量字段值
- L_SKIP_LINES_OFFSET
```
public static final int L_SKIP_LINES_OFFSET
```
  另请参阅:
  
  常量字段值
- L_TBL_LEN_OFFSET
```
public static final int L_TBL_LEN_OFFSET
```
  另请参阅:
  
  常量字段值
- L_DB_LEN_OFFSET
```
public static final int L_DB_LEN_OFFSET
```
  另请参阅:
  
  常量字段值
- L_NUM_FIELDS_OFFSET
```
public static final int L_NUM_FIELDS_OFFSET
```
  另请参阅:
  
  常量字段值
- L_SQL_EX_OFFSET
```
public static final int L_SQL_EX_OFFSET
```
  另请参阅:
  
  常量字段值
- L_DATA_OFFSET
```
public static final int L_DATA_OFFSET
```
  另请参阅:
  
  常量字段值
- DUMPFILE_FLAG
```
public static final int DUMPFILE_FLAG
```
  另请参阅:
  
  常量字段值
- OPT_ENCLOSED_FLAG
```
public static final int OPT_ENCLOSED_FLAG
```
  另请参阅:
  
  常量字段值
- REPLACE_FLAG
```
public static final int REPLACE_FLAG
```
  另请参阅:
  
  常量字段值
- IGNORE_FLAG
```
public static final int IGNORE_FLAG
```
  另请参阅:
  
  常量字段值
- FIELD_TERM_EMPTY
```
public static final int FIELD_TERM_EMPTY
```
  另请参阅:
  
  常量字段值
- ENCLOSED_EMPTY
```
public static final int ENCLOSED_EMPTY
```
  另请参阅:
  
  常量字段值
- LINE_TERM_EMPTY
```
public static final int LINE_TERM_EMPTY
```
  另请参阅:
  
  常量字段值
- LINE_START_EMPTY
```
public static final int LINE_START_EMPTY
```
  另请参阅:
  
  常量字段值
- ESCAPED_EMPTY
```
public static final int ESCAPED_EMPTY
```
  另请参阅:
  
  常量字段值

构造器详细资料

LoadLogEvent

public LoadLogEvent(LogHeader header,
                    LogBuffer buffer,
                    FormatDescriptionLogEvent descriptionEvent)

方法详细资料

copyLogEvent

protected final void copyLogEvent(LogBuffer buffer,
                                  int bodyOffset,
                                  FormatDescriptionLogEvent descriptionEvent)

getTable
```
public final String getTable()
```

getDb
```
public final String getDb()
```

getFname
```
public final String getFname()
```

getSkipLines
```
public final int getSkipLines()
```

getFields
```
public final String[] getFields()
```

getFieldTerm
```
public final String getFieldTerm()
```

getLineTerm
```
public final String getLineTerm()
```

getLineStart
```
public final String getLineStart()
```

getEnclosed
```
public final String getEnclosed()
```

getEscaped
```
public final String getEscaped()
```

getOptFlags
```
public final int getOptFlags()
```

getEmptyFlags
```
public final int getEmptyFlags()
```

getExecTime
```
public final long getExecTime()
```

类 LoadLogEvent

字段概要

从类继承的字段 net.wicp.tams.common.binlog.parser.LogEvent

构造器概要

方法概要

从类继承的方法 net.wicp.tams.common.binlog.parser.LogEvent

从类继承的方法 java.lang.Object

字段详细资料

L_THREAD_ID_OFFSET

L_EXEC_TIME_OFFSET

L_SKIP_LINES_OFFSET

L_TBL_LEN_OFFSET

L_DB_LEN_OFFSET

L_NUM_FIELDS_OFFSET

L_SQL_EX_OFFSET

L_DATA_OFFSET

DUMPFILE_FLAG

OPT_ENCLOSED_FLAG

REPLACE_FLAG

IGNORE_FLAG

FIELD_TERM_EMPTY

ENCLOSED_EMPTY

LINE_TERM_EMPTY

LINE_START_EMPTY

ESCAPED_EMPTY

构造器详细资料

LoadLogEvent

方法详细资料

copyLogEvent

getTable

getDb

getFname

getSkipLines

getFields

getFieldTerm

getLineTerm

getLineStart

getEnclosed

getEscaped

getOptFlags

getEmptyFlags

getExecTime