MDEV-22330: mysqlbinlog stops with an error Don't know how to handle …

…column type: 255 meta: 4 (0004)

Analysis:
========
"mysqlbinlog -v" option will reconstruct row events and display them as
commented SQL statements. If this option is given twice, the output includes
comments to indicate column data types and some metadata.
`log_event_print_value` is the function reponsible for printing values and
their types. This function doesn't handle GEOMETRY type. Hence the above error
gets printed.

Fix:
===
Add support for GEOMETRY datatype.

mysql-test/suite/binlog/r/binlog_mysqlbinlog_row.result

@@ -339,7 +339,11 @@ a
 123.47
 999.99
 DROP TABLE t1dec102;
-flush logs;
+CREATE TABLE t1 (a GEOMETRY DEFAULT NULL);
+INSERT INTO t1 VALUES (NULL);
+INSERT INTO t1 VALUES (POINT(10,10));
+DROP TABLE t1;
+FLUSH LOGS;
 /*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
 /*!40019 SET @@session.max_insert_delayed_threads=0*/;
 /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
@@ -4623,6 +4627,56 @@ SET TIMESTAMP=1000000000/*!*/;
 DROP TABLE `t1dec102` /* generated by server */
 /*!*/;
 # at #
+#010909  4:46:40 server id 1  end_log_pos # 	GTID 0-1-321 ddl
+/*!100001 SET @@session.gtid_seq_no=321*//*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Query	thread_id=#	exec_time=#	error_code=0
+SET TIMESTAMP=1000000000/*!*/;
+CREATE TABLE t1 (a GEOMETRY DEFAULT NULL)
+/*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	GTID 0-1-322
+/*!100001 SET @@session.gtid_seq_no=322*//*!*/;
+BEGIN
+/*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Table_map: `test`.`t1` mapped to number #
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Write_rows: table id # flags: STMT_END_F
+### INSERT INTO `test`.`t1`
+### SET
+###   @1=NULL /* GEOMETRY meta=4 nullable=1 is_null=1 */
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Query	thread_id=#	exec_time=#	error_code=0
+SET TIMESTAMP=1000000000/*!*/;
+COMMIT
+/*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	GTID 0-1-323
+/*!100001 SET @@session.gtid_seq_no=323*//*!*/;
+BEGIN
+/*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Table_map: `test`.`t1` mapped to number #
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Write_rows: table id # flags: STMT_END_F
+### INSERT INTO `test`.`t1`
+### SET
+###   @1='\x00\x00\x00\x00\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00$@\x00\x00\x00\x00\x00\x00$@' /* GEOMETRY meta=4 nullable=1 is_null=0 */
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Query	thread_id=#	exec_time=#	error_code=0
+SET TIMESTAMP=1000000000/*!*/;
+COMMIT
+/*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	GTID 0-1-324 ddl
+/*!100001 SET @@session.gtid_seq_no=324*//*!*/;
+# at #
+#010909  4:46:40 server id 1  end_log_pos # 	Query	thread_id=#	exec_time=#	error_code=0
+SET TIMESTAMP=1000000000/*!*/;
+DROP TABLE `t1` /* generated by server */
+/*!*/;
+# at #
 #010909  4:46:40 server id 1  end_log_pos # 	Rotate to master-bin.000002  pos: 4
 DELIMITER ;
 # End of log file

mysql-test/suite/binlog/t/binlog_mysqlbinlog_row.test

@@ -450,7 +450,19 @@ INSERT INTO t1dec102 VALUES (999.99);
 SELECT * FROM t1dec102 ORDER BY a;
 DROP TABLE t1dec102;
 
-flush logs;
+
+#
+# MDEV-22330: mysqlbinlog stops with an error Don't know how to handle column
+#             type: 255 meta: 4 (0004)
+# Check support for GEOMETRY type with verbose mode.
+#
+CREATE TABLE t1 (a GEOMETRY DEFAULT NULL);
+
+INSERT INTO t1 VALUES (NULL);
+INSERT INTO t1 VALUES (POINT(10,10));
+DROP TABLE t1;
+
+FLUSH LOGS;
 
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 --replace_regex /SQL_LOAD_MB-[0-9]-[0-9]/SQL_LOAD_MB-#-#/ /exec_time=[0-9]*/exec_time=#/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /server v [^ ]*/server v #.##.##/ /(@[0-9]*=[0-9]*[.][0-9]{1,3})[0-9e+-]*[^ ]*(.*(FLOAT|DOUBLE).*[*].)/\1...\2/

sql/log_event.cc

@@ -2575,13 +2575,20 @@ log_event_print_value(IO_CACHE *file, const uchar *ptr,
                 "Not enough metadata to display the value. ");
     break;
 
+  case MYSQL_TYPE_GEOMETRY:
+    strmake(typestr, "GEOMETRY", typestr_length);
+    if (!ptr)
+      goto return_null;
+
+    length= uint4korr(ptr);
+    my_b_write_quoted(file, ptr + meta, length);
+    return length + meta;
+
   default:
     {
-      char tmp[5];
-      my_snprintf(tmp, sizeof(tmp), "%04x", meta);
-      my_b_printf(file,
-                  "!! Don't know how to handle column type=%d meta=%d (%s)",
-                  type, meta, tmp);
+      fprintf(stderr,
+              "\nError: Don't know how to handle column type: %d meta: %d (%04x)\n",
+              type, meta, meta);
     }
     break;
   }