fixes issue #4388 , support mariadb 10.x log_bin_compress

alibaba · Sep 1, 2023 · f13cc4e · f13cc4e
1 parent 252ca02
commit f13cc4e
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Showing 23 changed files with 673 additions and 343 deletions.
diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogBuffer.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogBuffer.java
diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogDecoder.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogDecoder.java
@@ -126,14 +126,15 @@ public List<LogEvent> processIterateDecode(LogEvent event, LogContext context) t
             TransactionPayloadLogEvent compressEvent = ((TransactionPayloadLogEvent) event);
             LogBuffer iterateBuffer = null;
             if (compressEvent.isCompressByZstd()) {
-                ZstdCompressorInputStream in = new ZstdCompressorInputStream(
-                    new ByteArrayInputStream(compressEvent.getPayload()));
-                byte[] decodeBytes = IOUtils.toByteArray(in);
-                iterateBuffer = new LogBuffer(decodeBytes, 0, decodeBytes.length);
+                try (ZstdCompressorInputStream in = new ZstdCompressorInputStream(
+                    new ByteArrayInputStream(compressEvent.getPayload()))) {
+                    byte[] decodeBytes = IOUtils.toByteArray(in);
+                    iterateBuffer = new LogBuffer(decodeBytes, 0, decodeBytes.length);
+                }
             } else if (compressEvent.isCompressByNone()) {
                 iterateBuffer = new LogBuffer(compressEvent.getPayload(), 0, compressEvent.getPayload().length);
             } else {
-                throw new IllegalArgumentException("unkonow compresstype for " + event.getHeader().getLogFileName()
+                throw new IllegalArgumentException("unknow compress type for " + event.getHeader().getLogFileName()
                                                    + ":" + event.getHeader().getLogPos());
             }
 
@@ -446,6 +447,7 @@ public static LogEvent decode(LogBuffer buffer, LogHeader header, LogContext con
                 BinlogCheckPointLogEvent event = new BinlogCheckPointLogEvent(header, buffer, descriptionEvent);
                 /* updating position in context */
                 logPosition.position = header.getLogPos();
+                logPosition.fileName = event.getFilename();
                 return event;
             }
             case LogEvent.GTID_EVENT: {
@@ -487,31 +489,37 @@ public static LogEvent decode(LogBuffer buffer, LogHeader header, LogContext con
                 return event;
             }
             case LogEvent.QUERY_COMPRESSED_EVENT: {
-                if (logger.isWarnEnabled()) {
-                    logger.warn("Skipping unsupported MaraiDB QUERY_COMPRESSED_EVENT from: " + context.getLogPosition());
-                }
-                break;
+                QueryCompressedLogEvent event = new QueryCompressedLogEvent(header, buffer, descriptionEvent);
+                /* updating position in context */
+                logPosition.position = header.getLogPos();
+                return event;
             }
             case LogEvent.WRITE_ROWS_COMPRESSED_EVENT_V1:
             case LogEvent.WRITE_ROWS_COMPRESSED_EVENT: {
-                if (logger.isWarnEnabled()) {
-                    logger.warn("Skipping unsupported MaraiDB WRITE_ROWS_COMPRESSED_EVENT from: " + context.getLogPosition());
-                }
-                break;
+                WriteRowsCompressLogEvent event = new WriteRowsCompressLogEvent(header, buffer, descriptionEvent);
+                /* updating position in context */
+                logPosition.position = header.getLogPos();
+                event.fillTable(context);
+                header.putGtid(context.getGtidSet(), gtidLogEvent);
+                return event;
             }
             case LogEvent.UPDATE_ROWS_COMPRESSED_EVENT_V1:
             case LogEvent.UPDATE_ROWS_COMPRESSED_EVENT: {
-                if (logger.isWarnEnabled()) {
-                    logger.warn("Skipping unsupported MaraiDB UPDATE_ROWS_COMPRESSED_EVENT from: " + context.getLogPosition());
-                }
-                break;
+                UpdateRowsCompressLogEvent event = new UpdateRowsCompressLogEvent(header, buffer, descriptionEvent);
+                /* updating position in context */
+                logPosition.position = header.getLogPos();
+                event.fillTable(context);
+                header.putGtid(context.getGtidSet(), gtidLogEvent);
+                return event;
             }
             case LogEvent.DELETE_ROWS_COMPRESSED_EVENT_V1:
             case LogEvent.DELETE_ROWS_COMPRESSED_EVENT: {
-                if (logger.isWarnEnabled()) {
-                    logger.warn("Skipping unsupported MaraiDB DELETE_ROWS_COMPRESSED_EVENT from: " + context.getLogPosition());
-                }
-                break;
+                DeleteRowsCompressLogEvent event = new DeleteRowsCompressLogEvent(header, buffer, descriptionEvent);
+                /* updating position in context */
+                logPosition.position = header.getLogPos();
+                event.fillTable(context);
+                header.putGtid(context.getGtidSet(), gtidLogEvent);
+                return event;
             }
             default:
                 /*

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/DeleteRowsLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/DeleteRowsLogEvent.java
@@ -9,9 +9,14 @@
  * @author <a href="mailto:[email protected]">Changyuan.lh</a>
  * @version 1.0
  */
-public final class DeleteRowsLogEvent extends RowsLogEvent {
+public class DeleteRowsLogEvent extends RowsLogEvent {
 
     public DeleteRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){
-        super(header, buffer, descriptionEvent);
+        super(header, buffer, descriptionEvent, false, false);
+    }
+
+    public DeleteRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
+                              boolean compress){
+        super(header, buffer, descriptionEvent, false, compress);
     }
 }
diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/FormatDescriptionLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/FormatDescriptionLogEvent.java
@@ -221,6 +221,15 @@ public FormatDescriptionLogEvent(final int binlogVersion){
                 postHeaderLen[GTID_EVENT - 1] = GTID_HEADER_LEN;
                 postHeaderLen[GTID_LIST_EVENT - 1] = GTID_LIST_HEADER_LEN;
                 postHeaderLen[START_ENCRYPTION_EVENT - 1] = START_ENCRYPTION_HEADER_LEN;
+
+                // mariadb compress
+                postHeaderLen[QUERY_COMPRESSED_EVENT - 1] = QUERY_COMPRESSED_EVENT;
+                postHeaderLen[WRITE_ROWS_COMPRESSED_EVENT - 1] = ROWS_HEADER_LEN_V2;
+                postHeaderLen[UPDATE_ROWS_COMPRESSED_EVENT - 1] = ROWS_HEADER_LEN_V2;
+                postHeaderLen[DELETE_ROWS_COMPRESSED_EVENT - 1] = ROWS_HEADER_LEN_V2;
+                postHeaderLen[WRITE_ROWS_COMPRESSED_EVENT_V1 - 1] = ROWS_HEADER_LEN_V1;
+                postHeaderLen[UPDATE_ROWS_COMPRESSED_EVENT_V1 - 1] = ROWS_HEADER_LEN_V1;
+                postHeaderLen[DELETE_ROWS_COMPRESSED_EVENT_V1 - 1] = ROWS_HEADER_LEN_V1;
                 break;
 
             case 3: /* 4.0.x x>=2 */

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/LogHeader.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/LogHeader.java
@@ -1,12 +1,12 @@
 package com.taobao.tddl.dbsync.binlog.event;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import com.alibaba.otter.canal.parse.driver.mysql.packets.GTIDSet;
 import com.taobao.tddl.dbsync.binlog.LogBuffer;
 import com.taobao.tddl.dbsync.binlog.LogEvent;
 
-import java.util.HashMap;
-import java.util.Map;
-
 /**
  * The Common-Header, documented in the table @ref Table_common_header "below",
  * always has the same form and length within one version of MySQL. Each event
@@ -66,7 +66,7 @@
  */
 public final class LogHeader {
 
-    protected final int type;
+    protected int                 type;
 
     /**
      * The offset in the log where this event originally appeared (it is

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/QueryLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/QueryLogEvent.java
@@ -438,9 +438,13 @@ public class QueryLogEvent extends LogEvent {
     private String          timezone;
 
     public QueryLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent)
-                                                                                                        throws IOException{
-        super(header);
+                                                                                                         throws IOException{
+        this(header, buffer, descriptionEvent, false);
+    }
 
+    public QueryLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
+                         boolean compress) throws IOException{
+        super(header);
         final int commonHeaderLen = descriptionEvent.commonHeaderLen;
         final int postHeaderLen = descriptionEvent.postHeaderLen[header.type - 1];
         /*
@@ -495,10 +499,15 @@ public QueryLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEve
         unpackVariables(buffer, end);
         buffer.position(end);
         buffer.limit(limit);
-
         /* A 2nd variable part; this is common to all versions */
-        final int queryLen = dataLen - dbLen - 1;
         dbname = buffer.getFixName(dbLen + 1);
+        int queryLen = dataLen - dbLen - 1;
+        if (compress) {
+            // mariadb compress log event
+            // see https://github.com/alibaba/canal/issues/4388
+            buffer = buffer.uncompressBuf();
+            queryLen = buffer.limit();
+        }
         if (clientCharset >= 0) {
             charset = CharsetConversion.getNioCharset(clientCharset);
 

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/RotateLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/RotateLogEvent.java
@@ -88,9 +88,10 @@ public RotateLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEv
 
         final int filenameOffset = headerSize + postHeaderLen;
         int filenameLen = buffer.limit() - filenameOffset;
-        if (filenameLen > FN_REFLEN - 1) filenameLen = FN_REFLEN - 1;
+        if (filenameLen > FN_REFLEN - 1) {
+            filenameLen = FN_REFLEN - 1;
+        }
         buffer.position(filenameOffset);
-
         filename = buffer.getFixString(filenameLen);
     }
 

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/RowsLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/RowsLogEvent.java
@@ -3,11 +3,11 @@
 import java.nio.charset.Charset;
 import java.util.BitSet;
 
-import com.taobao.tddl.dbsync.binlog.exception.TableIdNotFoundException;
 import com.taobao.tddl.dbsync.binlog.LogBuffer;
 import com.taobao.tddl.dbsync.binlog.LogContext;
 import com.taobao.tddl.dbsync.binlog.LogEvent;
 import com.taobao.tddl.dbsync.binlog.event.TableMapLogEvent.ColumnInfo;
+import com.taobao.tddl.dbsync.binlog.exception.TableIdNotFoundException;
 
 /**
  * Common base class for all row-containing log events.
@@ -118,9 +118,14 @@ public RowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEven
         this(header, buffer, descriptionEvent, false);
     }
 
-    public RowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent, boolean partial){
-        super(header);
+    public RowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
+                        boolean partial){
+        this(header, buffer, descriptionEvent, false, false);
+    }
 
+    public RowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent, boolean partial,
+                        boolean compress){
+        super(header);
         final int commonHeaderLen = descriptionEvent.commonHeaderLen;
         final int postHeaderLen = descriptionEvent.postHeaderLen[header.type - 1];
         int headerLen = 0;
@@ -167,14 +172,27 @@ public RowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEven
         columns = buffer.getBitmap(columnLen);
 
         if (header.type == UPDATE_ROWS_EVENT_V1 || header.type == UPDATE_ROWS_EVENT
-            || header.type == PARTIAL_UPDATE_ROWS_EVENT) {
+            || header.type == PARTIAL_UPDATE_ROWS_EVENT || header.type == UPDATE_ROWS_COMPRESSED_EVENT
+            || header.type == UPDATE_ROWS_COMPRESSED_EVENT_V1) {
             changeColumns = buffer.getBitmap(columnLen);
         } else {
             changeColumns = columns;
         }
 
         // XXX: Don't handle buffer in another thread.
         int dataSize = buffer.limit() - buffer.position();
+        if (compress) {
+            // mariadb compress log event
+            // see https://github.com/alibaba/canal/issues/4388
+            buffer = buffer.uncompressBuf();
+            dataSize = buffer.limit();
+            // rewrite type
+            if (postHeaderLen == FormatDescriptionLogEvent.ROWS_HEADER_LEN_V2) {
+                header.type = header.type - WRITE_ROWS_COMPRESSED_EVENT + WRITE_ROWS_EVENT;
+            } else {
+                header.type = header.type - WRITE_ROWS_COMPRESSED_EVENT_V1 + WRITE_ROWS_EVENT_V1;
+            }
+        }
         rowsBuf = buffer.duplicate(dataSize);
     }
 

diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/UpdateRowsLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/UpdateRowsLogEvent.java
@@ -11,14 +11,19 @@
  * @author <a href="mailto:[email protected]">Changyuan.lh</a>
  * @version 1.0
  */
-public final class UpdateRowsLogEvent extends RowsLogEvent {
+public class UpdateRowsLogEvent extends RowsLogEvent {
 
     public UpdateRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){
-        super(header, buffer, descriptionEvent, false);
+        super(header, buffer, descriptionEvent, false , false);
     }
 
     public UpdateRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
                               boolean partial){
-        super(header, buffer, descriptionEvent, partial);
+        super(header, buffer, descriptionEvent, partial ,false);
+    }
+
+    public UpdateRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
+                              boolean partial , boolean compress){
+        super(header, buffer, descriptionEvent, partial , compress);
     }
 }
diff --git a/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/WriteRowsLogEvent.java b/dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/WriteRowsLogEvent.java
@@ -9,9 +9,14 @@
  * @author <a href="mailto:[email protected]">Changyuan.lh</a>
  * @version 1.0
  */
-public final class WriteRowsLogEvent extends RowsLogEvent {
+public class WriteRowsLogEvent extends RowsLogEvent {
 
     public WriteRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){
-        super(header, buffer, descriptionEvent);
+        super(header, buffer, descriptionEvent, false, false);
+    }
+
+    public WriteRowsLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent,
+                             boolean compress){
+        super(header, buffer, descriptionEvent, false, compress);
     }
 }
diff --git a/...c/src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/BinlogCheckPointLogEvent.java b/...c/src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/BinlogCheckPointLogEvent.java
@@ -13,9 +13,20 @@
  */
 public class BinlogCheckPointLogEvent extends IgnorableLogEvent {
 
+    private final String filename;
+
     public BinlogCheckPointLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){
         super(header, buffer, descriptionEvent);
-        // do nothing , just mariadb binlog checkpoint
+        // mariadb binlog checkpoint
+        final int headerSize = descriptionEvent.getCommonHeaderLen();
+        final int postHeaderLen = descriptionEvent.getPostHeaderLen()[getHeader().getType() - 1];
+
+        buffer.position(headerSize);
+        long binlogFileLen = buffer.getUint32();
+        filename = buffer.getFixString((int) binlogFileLen);
     }
 
+    public String getFilename() {
+        return filename;
+    }
 }
diff --git a/...src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/DeleteRowsCompressLogEvent.java b/...src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/DeleteRowsCompressLogEvent.java
@@ -0,0 +1 @@
+package com.taobao.tddl.dbsync.binlog.event.mariadb;import com.taobao.tddl.dbsync.binlog.LogBuffer;import com.taobao.tddl.dbsync.binlog.event.DeleteRowsLogEvent;import com.taobao.tddl.dbsync.binlog.event.FormatDescriptionLogEvent;import com.taobao.tddl.dbsync.binlog.event.LogHeader;/** * mariadb compress rows event *  * @author jianghang * @since 1.1.7 */public class DeleteRowsCompressLogEvent extends DeleteRowsLogEvent {    public DeleteRowsCompressLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){        super(header, buffer, descriptionEvent, true);    }}

diff --git a/...nc/src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/QueryCompressedLogEvent.java b/...nc/src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/QueryCompressedLogEvent.java
@@ -0,0 +1 @@
+package com.taobao.tddl.dbsync.binlog.event.mariadb;import java.io.IOException;import com.taobao.tddl.dbsync.binlog.LogBuffer;import com.taobao.tddl.dbsync.binlog.event.FormatDescriptionLogEvent;import com.taobao.tddl.dbsync.binlog.event.LogHeader;import com.taobao.tddl.dbsync.binlog.event.QueryLogEvent;/** * mariadb compress query event *  * @author jianghang * @since 1.1.7 */public class QueryCompressedLogEvent extends QueryLogEvent {    public QueryCompressedLogEvent(LogHeader header, LogBuffer buffer,                                   FormatDescriptionLogEvent descriptionEvent) throws IOException{        super(header, buffer, descriptionEvent, true);    }}

diff --git a/...src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/UpdateRowsCompressLogEvent.java b/...src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/UpdateRowsCompressLogEvent.java
@@ -0,0 +1 @@
+package com.taobao.tddl.dbsync.binlog.event.mariadb;import com.taobao.tddl.dbsync.binlog.LogBuffer;import com.taobao.tddl.dbsync.binlog.event.FormatDescriptionLogEvent;import com.taobao.tddl.dbsync.binlog.event.LogHeader;import com.taobao.tddl.dbsync.binlog.event.UpdateRowsLogEvent;/** * mariadb compress rows event *  * @author jianghang * @since 1.1.7 */public class UpdateRowsCompressLogEvent extends UpdateRowsLogEvent {    public UpdateRowsCompressLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){        super(header, buffer, descriptionEvent, false, true);    }}

diff --git a/.../src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/WriteRowsCompressLogEvent.java b/.../src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/WriteRowsCompressLogEvent.java
@@ -0,0 +1 @@
+package com.taobao.tddl.dbsync.binlog.event.mariadb;import com.taobao.tddl.dbsync.binlog.LogBuffer;import com.taobao.tddl.dbsync.binlog.event.FormatDescriptionLogEvent;import com.taobao.tddl.dbsync.binlog.event.LogHeader;import com.taobao.tddl.dbsync.binlog.event.WriteRowsLogEvent;/** * mariadb compress rows event *  * @author jianghang * @since 1.1.7 */public class WriteRowsCompressLogEvent extends WriteRowsLogEvent {    public WriteRowsCompressLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){        super(header, buffer, descriptionEvent,  true);    }}

diff --git a/dbsync/src/test/java/com/taobao/tddl/dbsync/binlog/DirectLogFetcherTest.java b/dbsync/src/test/java/com/taobao/tddl/dbsync/binlog/DirectLogFetcherTest.java
@@ -6,6 +6,7 @@
 import java.sql.Statement;
 import java.util.List;
 
+import com.taobao.tddl.dbsync.binlog.event.mariadb.BinlogCheckPointLogEvent;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -19,12 +20,12 @@ public void testSimple() {
         DirectLogFetcher fecther = new DirectLogFetcher();
         try {
             Class.forName("com.mysql.jdbc.Driver");
-            Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306", "root", "hello");
+            Connection connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306", "root", "123456");
             Statement statement = connection.createStatement();
             statement.execute("SET @master_binlog_checksum='@@global.binlog_checksum'");
             statement.execute("SET @mariadb_slave_capability='" + LogEvent.MARIA_SLAVE_CAPABILITY_MINE + "'");
 
-            fecther.open(connection, "binlog.000002", 4L, 1);
+            fecther.open(connection, "mysql-bin.000002", 4L, 1);
 
             LogDecoder decoder = new LogDecoder(LogEvent.UNKNOWN_EVENT, LogEvent.ENUM_END_EVENT);
             LogContext context = new LogContext();
@@ -51,6 +52,9 @@ public void processEvent(LogEvent event, LogDecoder decoder, LogContext context)
             case LogEvent.ROTATE_EVENT:
                 binlogFileName = ((RotateLogEvent) event).getFilename();
                 break;
+            case LogEvent.BINLOG_CHECKPOINT_EVENT:
+                binlogFileName = ((BinlogCheckPointLogEvent) event).getFilename();
+                break;
             case LogEvent.WRITE_ROWS_EVENT_V1:
             case LogEvent.WRITE_ROWS_EVENT:
                 parseRowsEvent((WriteRowsLogEvent) event);
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		package com.taobao.tddl.dbsync.binlog.event.mariadb;import com.taobao.tddl.dbsync.binlog.LogBuffer;import com.taobao.tddl.dbsync.binlog.event.DeleteRowsLogEvent;import com.taobao.tddl.dbsync.binlog.event.FormatDescriptionLogEvent;import com.taobao.tddl.dbsync.binlog.event.LogHeader;/** * mariadb compress rows event * * @author jianghang * @since 1.1.7 */public class DeleteRowsCompressLogEvent extends DeleteRowsLogEvent { public DeleteRowsCompressLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){ super(header, buffer, descriptionEvent, true); }}
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