1 unstable release
| 0.1.0 | Jan 19, 2024 |
|---|
#1019 in Database interfaces
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150KB
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SLoC
mysql-binlog-connector-rust
Overview
- A simple but strong lib to parse mysql Row Based Replication Events in RUST with async IO.
Supported mysql versions
- mysql 5.6 (tested in mysql:5.6.51)
- mysql 5.7 (tested in mysql:5.7.40)
- mysql 8.0 (tested in mysql:8.0.31)
Supported event types
-
FORMAT_DESCRIPTION_EVENT
-
ROTATE_EVENT
-
PREVIOUS_GTIDS_LOG_EVENT
-
GTID_LOG_EVENT
-
QUERY_EVENT
-
XID_EVENT
-
XA_PREPARE_LOG_EVENT
-
TRANSACTION_PAYLOAD_EVENT
-
ROWS_QUERY_LOG_EVENT
-
TABLE_MAP_EVENT
-
WRITE_ROWS_EVENT_V1
-
WRITE_ROWS_EVENT
-
UPDATE_ROWS_EVENT_V1
-
UPDATE_ROWS_EVENT
-
DELETE_ROWS_EVENT_V1
-
DELETE_ROWS_EVENT
-
for more details, refer to: https://dev.mysql.com/doc/dev/mysql-server/latest/page_protocol_replication_binlog_event.html
Mapping between mysql columns and rust types
| mysql column type | binlog column type(raw) | binlog column type(parsed from binlog column meta) | rust type |
|---|---|---|---|
| BIT | MYSQL_TYPE_BIT = 16 | ColumnType::Bit | ColumnValue::Bit(u64) |
| TINYINT [UNSIGNED] | MYSQL_TYPE_TINY = 1 | ColumnType::Tiny | ColumnValue::Tiny(i8) |
| SMALLINT [UNSIGNED] | MYSQL_TYPE_SHORT = 2 | ColumnType::Short | ColumnValue::Short(i16) |
| MEDIUMINT [UNSIGNED] | MYSQL_TYPE_INT24 = 9 | ColumnType::Int24 | ColumnValue::Long(i32) |
| INT [UNSIGNED] | MYSQL_TYPE_LONG = 3 | ColumnType::Long | ColumnValue::Long(i32) |
| BIGINT [UNSIGNED] | MYSQL_TYPE_LONGLONG = 8 | ColumnType::LongLong | ColumnValue::LongLong(i64) |
| FLOAT | MYSQL_TYPE_FLOAT = 4 | ColumnType::Float | ColumnValue::Float(f32) |
| DOUBLE | MYSQL_TYPE_DOUBLE = 5 | ColumnType::Double | ColumnValue::Double(f64) |
| DECIMAL | MYSQL_TYPE_NEWDECIMAL = 246 | ColumnType::NewDecimal | ColumnValue::Decimal(String) |
| DATE | MYSQL_TYPE_DATE = 10 | ColumnType::Date | ColumnValue::Date(String) |
| TIME | MYSQL_TYPE_TIME2 = 19 | ColumnType::Time2 | ColumnValue::Time(String) |
| TIMESTAMP | MYSQL_TYPE_TIMESTAMP2 = 17 | ColumnType::TimeStamp2 | ColumnValue::Timestamp(i64) |
| DATETIME | MYSQL_TYPE_DATETIME2 = 18 | ColumnType::DateTime2 | ColumnValue::DateTime(String) |
| YEAR | MYSQL_TYPE_YEAR = 13 | ColumnType::Year | ColumnValue::Year(u16) |
| CHAR | MYSQL_TYPE_STRING = 254 | ColumnType::String | ColumnValue::String(Vec<u8>) |
| VARCHAR | MYSQL_TYPE_VARCHAR = 15 | ColumnType::VarChar | ColumnValue::String(Vec<u8>) |
| BINARY | MYSQL_TYPE_STRING = 254 | ColumnType::String | ColumnValue::String(Vec<u8>) |
| VARBINARY | MYSQL_TYPE_VARCHAR = 15 | ColumnType::VarChar | ColumnValue::String(Vec<u8>) |
| ENUM | MYSQL_TYPE_STRING = 254 | ColumnType::Enum | ColumnValue::Enum(u32) |
| SET | MYSQL_TYPE_STRING = 254 | ColumnType::Set | ColumnValue::Set(u64) |
| TINYTEXT TEXT MEDIUMTEXT LONGTEXT TINYBLOB BLOB MEDIUMBLOB LONGBLOB | MYSQL_TYPE_BLOB = 252 | ColumnType::Blob | ColumnValue::Blob(Vec<u8>) |
| GEOMETRY | MYSQL_TYPE_GEOMETRY = 255 | ColumnType::Geometry | ColumnValue::Blob(Vec<u8>) |
| JSON | MYSQL_TYPE_JSON = 245 | ColumnType::Json | ColumnValue::Json(Vec<u8>) |
- for CHAR / VARCHAR columns, since binlog contains no charset information, we just get raw bytes and store them in ColumnValue::String(Vec<u8>) objects, you may need to convert them into strings based on column metadatas for further usage.
- for UNSIGNED numeric columns, since binlog contains no unsigned flags, we just parse them as signed numerics, you may need to convert them into unsigned values based on column metadatas for further usage.
- for JSON columns, we get raw bytes and store them in ColumnValue::Json(Vec<u8>) objects, we also provide a default deserializer "JsonBinary" to parse them into strings, find example later in this doc.
Quick start
Run tests
- start a mysql, enable binlog without binlog-transaction-compression :
docker run -d --name mysql57 \
--platform linux/x86_64 \
-it --restart=always \
-p 3307:3306 \
-e MYSQL_ROOT_PASSWORD="123456" \
mysql:5.7.40 \
--lower_case_table_names=1 \
--character-set-server=utf8 \
--collation-server=utf8_general_ci \
--datadir=/var/lib/mysql \
--user=mysql \
--server_id=1 \
--log_bin=/var/lib/mysql/mysql-bin.log \
--max_binlog_size=100M \
--gtid_mode=ON \
--enforce_gtid_consistency=ON \
--binlog_format=ROW
- start a mysql, enable binlog with binlog-transaction-compression
docker run -d --name mysql80 \
--platform linux/x86_64 \
-it --restart=always \
-p 3308:3306 -e MYSQL_ROOT_PASSWORD="123456" \
mysql:8.0.31 \
--lower_case_table_names=1 \
--character-set-server=utf8 \
--collation-server=utf8_general_ci \
--datadir=/var/lib/mysql \
--user=mysql \
--server_id=1 \
--log_bin=/var/lib/mysql/mysql-bin.log \
--max_binlog_size=100M \
--gtid_mode=ON \
--enforce_gtid_consistency=ON \
--binlog_format=ROW \
--binlog-transaction-compression \
--binlog_rows_query_log_events=ON \
--default_authentication_plugin=mysql_native_password \
--default_time_zone="+08:00"
- update configs in tests/.env
db_url=mysql://root:123456@127.0.0.1:3307
server_id=200
default_db="db_test"
default_tb="tb_test"
binlog_parse_millis=100
- run tests
cargo test --package mysql-binlog-connector-rust --test integration_test
- each test will:
- execute sqls to create tables and generate binlogs
- dump binlogs and parse
- wait binlog_parse_millis for all binlogs parsed
- you may increase binlog_parse_millis for big transactions
Examples
fn main() {
let env_path = env::current_dir().unwrap().join("example/src/.env");
dotenv::from_path(env_path).unwrap();
let db_url = env::var("db_url").unwrap();
let server_id: u64 = env::var("server_id").unwrap().parse().unwrap();
let binlog_filename = env::var("binlog_filename").unwrap();
let binlog_position: u32 = env::var("binlog_position").unwrap().parse().unwrap();
block_on(start_client(
db_url,
server_id,
binlog_filename,
binlog_position,
));
}
async fn start_client(url: String, server_id: u64, binlog_filename: String, binlog_position: u32) {
let mut client = BinlogClient {
url,
binlog_filename,
binlog_position,
server_id,
};
let mut stream = client.connect().await.unwrap();
loop {
let (header, data) = stream.read().await.unwrap();
println!("header: {:?}", header);
println!("data: {:?}", data);
println!("");
}
}
Example 1: parse binlogs with binlog-transaction-compression disabled
- execute sqls
flush logs;
SET autocommit=0;
CREATE DATABASE test_db;
USE test_db;
CREATE TABLE test_tb(id INT, value INT);
INSERT INTO test_tb VALUES(1,1),(2,2),(3,3),(4,4);
UPDATE test_tb SET value=3 WHERE id in(1,2);
DELETE FROM test_tb WHERE id in (1,2);
TRUNCATE TABLE test_tb;
DROP TABLE test_tb;
commit;
- show binlog events
mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000050 | 1255 |
mysql> show binlog events in 'mysql-bin.000050';
+------------------+------+----------------+-----------+-------------+------------------------------------------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+------+----------------+-----------+-------------+------------------------------------------------------------------------+
| mysql-bin.000050 | 4 | Format_desc | 1 | 123 | Server ver: 5.7.40-log, Binlog ver: 4 |
| mysql-bin.000050 | 123 | Previous_gtids | 1 | 194 | 50dc6874-13d3-11ee-a17a-0242ac110002:1-176027 |
| mysql-bin.000050 | 194 | Gtid | 1 | 259 | SET @@SESSION.GTID_NEXT= '50dc6874-13d3-11ee-a17a-0242ac110002:176028' |
| mysql-bin.000050 | 259 | Query | 1 | 378 | use `test_db`; CREATE TABLE test_tb(id INT, value INT) |
| mysql-bin.000050 | 378 | Gtid | 1 | 443 | SET @@SESSION.GTID_NEXT= '50dc6874-13d3-11ee-a17a-0242ac110002:176029' |
| mysql-bin.000050 | 443 | Query | 1 | 518 | BEGIN |
| mysql-bin.000050 | 518 | Table_map | 1 | 572 | table_id: 12832 (test_db.test_tb) |
| mysql-bin.000050 | 572 | Write_rows | 1 | 643 | table_id: 12832 flags: STMT_END_F |
| mysql-bin.000050 | 643 | Table_map | 1 | 697 | table_id: 12832 (test_db.test_tb) |
| mysql-bin.000050 | 697 | Update_rows | 1 | 769 | table_id: 12832 flags: STMT_END_F |
| mysql-bin.000050 | 769 | Table_map | 1 | 823 | table_id: 12832 (test_db.test_tb) |
| mysql-bin.000050 | 823 | Delete_rows | 1 | 876 | table_id: 12832 flags: STMT_END_F |
| mysql-bin.000050 | 876 | Xid | 1 | 907 | COMMIT /* xid=13739 */ |
| mysql-bin.000050 | 907 | Gtid | 1 | 972 | SET @@SESSION.GTID_NEXT= '50dc6874-13d3-11ee-a17a-0242ac110002:176030' |
| mysql-bin.000050 | 972 | Query | 1 | 1064 | use `test_db`; TRUNCATE TABLE test_tb |
| mysql-bin.000050 | 1064 | Gtid | 1 | 1129 | SET @@SESSION.GTID_NEXT= '50dc6874-13d3-11ee-a17a-0242ac110002:176031' |
| mysql-bin.000050 | 1129 | Query | 1 | 1255 | use `test_db`; DROP TABLE `test_tb` /* generated by server */ |
+------------------+------+----------------+-----------+-------------+------------------------------------------------------------------------+
- binlogs parsed
header: EventHeader { timestamp: 0, event_type: 4, server_id: 1, event_length: 47, next_event_position: 0, event_flags: 32 }
data: Rotate(RotateEvent { binlog_filename: "mysql-bin.000050", binlog_position: 194 })
header: EventHeader { timestamp: 1704443761, event_type: 15, server_id: 1, event_length: 119, next_event_position: 0, event_flags: 0 }
data: FormatDescription(FormatDescriptionEvent { binlog_version: 4, server_version: "5.7.40-log\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", create_timestamp: 0, header_length: 19, checksum_type: CRC32 })
header: EventHeader { timestamp: 1704443769, event_type: 33, server_id: 1, event_length: 65, next_event_position: 259, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "50dc6874-13d3-11ee-a17a-0242ac110002:176028" })
header: EventHeader { timestamp: 1704443769, event_type: 2, server_id: 1, event_length: 119, next_event_position: 378, event_flags: 0 }
data: Query(QueryEvent { thread_id: 493, exec_time: 0, error_code: 0, schema: "test_db", query: "CREATE TABLE test_tb(id INT, value INT)" })
header: EventHeader { timestamp: 1704443769, event_type: 33, server_id: 1, event_length: 65, next_event_position: 443, event_flags: 0 }
data: Gtid(GtidEvent { flags: 0, gtid: "50dc6874-13d3-11ee-a17a-0242ac110002:176029" })
header: EventHeader { timestamp: 1704443769, event_type: 2, server_id: 1, event_length: 75, next_event_position: 518, event_flags: 8 }
data: Query(QueryEvent { thread_id: 493, exec_time: 0, error_code: 0, schema: "test_db", query: "BEGIN" })
header: EventHeader { timestamp: 1704443769, event_type: 19, server_id: 1, event_length: 54, next_event_position: 572, event_flags: 0 }
data: TableMap(TableMapEvent { table_id: 12832, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })
header: EventHeader { timestamp: 1704443769, event_type: 30, server_id: 1, event_length: 71, next_event_position: 643, event_flags: 0 }
data: WriteRows(WriteRowsEvent { table_id: 12832, included_columns: [true, true], rows: [RowEvent { column_values: [Long(1), Long(1)] }, RowEvent { column_values: [Long(2), Long(2)] }, RowEvent { column_values: [Long(3), Long(3)] }, RowEvent { column_values: [Long(4), Long(4)] }] })
header: EventHeader { timestamp: 1704443769, event_type: 19, server_id: 1, event_length: 54, next_event_position: 697, event_flags: 0 }
data: TableMap(TableMapEvent { table_id: 12832, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })
header: EventHeader { timestamp: 1704443769, event_type: 31, server_id: 1, event_length: 72, next_event_position: 769, event_flags: 0 }
data: UpdateRows(UpdateRowsEvent { table_id: 12832, included_columns_before: [true, true], included_columns_after: [true, true], rows: [(RowEvent { column_values: [Long(1), Long(1)] }, RowEvent { column_values: [Long(1), Long(3)] }), (RowEvent { column_values: [Long(2), Long(2)] }, RowEvent { column_values: [Long(2), Long(3)] })] })
header: EventHeader { timestamp: 1704443769, event_type: 19, server_id: 1, event_length: 54, next_event_position: 823, event_flags: 0 }
data: TableMap(TableMapEvent { table_id: 12832, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })
header: EventHeader { timestamp: 1704443769, event_type: 32, server_id: 1, event_length: 53, next_event_position: 876, event_flags: 0 }
data: DeleteRows(DeleteRowsEvent { table_id: 12832, included_columns: [true, true], rows: [RowEvent { column_values: [Long(1), Long(3)] }, RowEvent { column_values: [Long(2), Long(3)] }] })
header: EventHeader { timestamp: 1704443769, event_type: 16, server_id: 1, event_length: 31, next_event_position: 907, event_flags: 0 }
data: Xid(XidEvent { xid: 13739 })
header: EventHeader { timestamp: 1704443769, event_type: 33, server_id: 1, event_length: 65, next_event_position: 972, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "50dc6874-13d3-11ee-a17a-0242ac110002:176030" })
header: EventHeader { timestamp: 1704443769, event_type: 2, server_id: 1, event_length: 92, next_event_position: 1064, event_flags: 0 }
data: Query(QueryEvent { thread_id: 493, exec_time: 0, error_code: 0, schema: "test_db", query: "TRUNCATE TABLE test_tb" })
header: EventHeader { timestamp: 1704443769, event_type: 33, server_id: 1, event_length: 65, next_event_position: 1129, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "50dc6874-13d3-11ee-a17a-0242ac110002:176031" })
header: EventHeader { timestamp: 1704443769, event_type: 2, server_id: 1, event_length: 126, next_event_position: 1255, event_flags: 4 }
data: Query(QueryEvent { thread_id: 493, exec_time: 0, error_code: 0, schema: "test_db", query: "DROP TABLE `test_tb` /* generated by server */" })
Example 2: parse binlogs with binlog-transaction-compression enabled
- execute sqls
flush logs;
SET autocommit=0;
CREATE DATABASE test_db;
USE test_db;
CREATE TABLE test_tb(id INT, value INT);
INSERT INTO test_tb VALUES(1,1),(2,2),(3,3),(4,4);
UPDATE test_tb SET value=3 WHERE id in(1,2);
DELETE FROM test_tb WHERE id in (1,2);
TRUNCATE TABLE test_tb;
DROP TABLE test_tb;
commit;
- show binlog events
mysql> show binary logs;
+------------------+-----------+-----------+
| Log_name | File_size | Encrypted |
+------------------+-----------+-----------+
| mysql-bin.000033 | 1429 | No |
mysql> show binlog events in 'mysql-bin.000033';
+------------------+------+---------------------+-----------+-------------+----------------------------------------------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+------+---------------------+-----------+-------------+----------------------------------------------------------------------------+
| mysql-bin.000033 | 4 | Format_desc | 1 | 126 | Server ver: 8.0.31, Binlog ver: 4 |
| mysql-bin.000033 | 126 | Previous_gtids | 1 | 197 | 36682cf3-a048-11ed-b4b3-0242ac110004:1-125753 |
| mysql-bin.000033 | 197 | Gtid | 1 | 274 | SET @@SESSION.GTID_NEXT= '36682cf3-a048-11ed-b4b3-0242ac110004:125754' |
| mysql-bin.000033 | 274 | Query | 1 | 391 | CREATE DATABASE test_db /* xid=5 */ |
| mysql-bin.000033 | 391 | Gtid | 1 | 468 | SET @@SESSION.GTID_NEXT= '36682cf3-a048-11ed-b4b3-0242ac110004:125755' |
| mysql-bin.000033 | 468 | Query | 1 | 601 | use `test_db`; CREATE TABLE test_tb(id INT, value INT) /* xid=10 */ |
| mysql-bin.000033 | 601 | Gtid | 1 | 680 | SET @@SESSION.GTID_NEXT= '36682cf3-a048-11ed-b4b3-0242ac110004:125756' |
| mysql-bin.000033 | 680 | Transaction_payload | 1 | 1033 | compression='ZSTD', decompressed_size=633 bytes |
| mysql-bin.000033 | 1033 | Query | 1 | 1033 | BEGIN |
| mysql-bin.000033 | 1033 | Rows_query | 1 | 1033 | # INSERT INTO test_tb VALUES(1,1),(2,2),(3,3),(4,4) |
| mysql-bin.000033 | 1033 | Table_map | 1 | 1033 | table_id: 90 (test_db.test_tb) |
| mysql-bin.000033 | 1033 | Write_rows | 1 | 1033 | table_id: 90 flags: STMT_END_F |
| mysql-bin.000033 | 1033 | Rows_query | 1 | 1033 | # UPDATE test_tb SET value=3 WHERE id in(1,2) |
| mysql-bin.000033 | 1033 | Table_map | 1 | 1033 | table_id: 90 (test_db.test_tb) |
| mysql-bin.000033 | 1033 | Update_rows | 1 | 1033 | table_id: 90 flags: STMT_END_F |
| mysql-bin.000033 | 1033 | Rows_query | 1 | 1033 | # DELETE FROM test_tb WHERE id in (1,2) |
| mysql-bin.000033 | 1033 | Table_map | 1 | 1033 | table_id: 90 (test_db.test_tb) |
| mysql-bin.000033 | 1033 | Delete_rows | 1 | 1033 | table_id: 90 flags: STMT_END_F |
| mysql-bin.000033 | 1033 | Xid | 1 | 1033 | COMMIT /* xid=11 */ |
| mysql-bin.000033 | 1033 | Gtid | 1 | 1110 | SET @@SESSION.GTID_NEXT= '36682cf3-a048-11ed-b4b3-0242ac110004:125757' |
| mysql-bin.000033 | 1110 | Query | 1 | 1214 | use `test_db`; TRUNCATE TABLE test_tb /* xid=14 */ |
| mysql-bin.000033 | 1214 | Gtid | 1 | 1291 | SET @@SESSION.GTID_NEXT= '36682cf3-a048-11ed-b4b3-0242ac110004:125758' |
| mysql-bin.000033 | 1291 | Query | 1 | 1429 | use `test_db`; DROP TABLE `test_tb` /* generated by server */ /* xid=15 */ |
+------------------+------+---------------------+-----------+-------------+----------------------------------------------------------------------------+
- binlogs parsed
header: EventHeader { timestamp: 1704445709, event_type: 15, server_id: 1, event_length: 122, next_event_position: 126, event_flags: 0 }
data: FormatDescription(FormatDescriptionEvent { binlog_version: 4, server_version: "8.0.31\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", create_timestamp: 0, header_length: 19, checksum_type: CRC32 })
header: EventHeader { timestamp: 1704445709, event_type: 35, server_id: 1, event_length: 71, next_event_position: 197, event_flags: 128 }
data: PreviousGtids(PreviousGtidsEvent { gtid_set: "36682cf3-a048-11ed-b4b3-0242ac110004:1-125753" })
header: EventHeader { timestamp: 1704445716, event_type: 33, server_id: 1, event_length: 77, next_event_position: 274, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "36682cf3-a048-11ed-b4b3-0242ac110004:125754" })
header: EventHeader { timestamp: 1704445716, event_type: 2, server_id: 1, event_length: 117, next_event_position: 391, event_flags: 8 }
data: Query(QueryEvent { thread_id: 8, exec_time: 0, error_code: 0, schema: "test_db", query: "CREATE DATABASE test_db" })
header: EventHeader { timestamp: 1704445716, event_type: 33, server_id: 1, event_length: 77, next_event_position: 468, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "36682cf3-a048-11ed-b4b3-0242ac110004:125755" })
header: EventHeader { timestamp: 1704445716, event_type: 2, server_id: 1, event_length: 133, next_event_position: 601, event_flags: 0 }
data: Query(QueryEvent { thread_id: 8, exec_time: 0, error_code: 0, schema: "test_db", query: "CREATE TABLE test_tb(id INT, value INT)" })
header: EventHeader { timestamp: 1704445717, event_type: 33, server_id: 1, event_length: 79, next_event_position: 680, event_flags: 0 }
data: Gtid(GtidEvent { flags: 0, gtid: "36682cf3-a048-11ed-b4b3-0242ac110004:125756" })
header: EventHeader { timestamp: 1704445717, event_type: 40, server_id: 1, event_length: 353, next_event_position: 1033, event_flags: 0 }
data: TransactionPayload(TransactionPayloadEvent { uncompressed_size: 633, uncompressed_events: [(EventHeader { timestamp: 1704445716, event_type: 2, server_id: 1, event_length: 74, next_event_position: 0, event_flags: 8 }, Query(QueryEvent { thread_id: 8, exec_time: 1, error_code: 0, schema: "test_db", query: "BEGIN" })), (EventHeader { timestamp: 1704445716, event_type: 29, server_id: 1, event_length: 69, next_event_position: 0, event_flags: 128 }, RowsQuery(RowsQueryEvent { query: "INSERT INTO test_tb VALUES(1,1),(2,2),(3,3),(4,4)" })), (EventHeader { timestamp: 1704445716, event_type: 19, server_id: 1, event_length: 53, next_event_position: 0, event_flags: 0 }, TableMap(TableMapEvent { table_id: 90, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })), (EventHeader { timestamp: 1704445716, event_type: 30, server_id: 1, event_length: 67, next_event_position: 0, event_flags: 0 }, WriteRows(WriteRowsEvent { table_id: 90, included_columns: [true, true], rows: [RowEvent { column_values: [Long(1), Long(1)] }, RowEvent { column_values: [Long(2), Long(2)] }, RowEvent { column_values: [Long(3), Long(3)] }, RowEvent { column_values: [Long(4), Long(4)] }] })), (EventHeader { timestamp: 1704445717, event_type: 29, server_id: 1, event_length: 63, next_event_position: 0, event_flags: 128 }, RowsQuery(RowsQueryEvent { query: "UPDATE test_tb SET value=3 WHERE id in(1,2)" })), (EventHeader { timestamp: 1704445717, event_type: 19, server_id: 1, event_length: 53, next_event_position: 0, event_flags: 0 }, TableMap(TableMapEvent { table_id: 90, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })), (EventHeader { timestamp: 1704445717, event_type: 31, server_id: 1, event_length: 68, next_event_position: 0, event_flags: 0 }, UpdateRows(UpdateRowsEvent { table_id: 90, included_columns_before: [true, true], included_columns_after: [true, true], rows: [(RowEvent { column_values: [Long(1), Long(1)] }, RowEvent { column_values: [Long(1), Long(3)] }), (RowEvent { column_values: [Long(2), Long(2)] }, RowEvent { column_values: [Long(2), Long(3)] })] })), (EventHeader { timestamp: 1704445717, event_type: 29, server_id: 1, event_length: 57, next_event_position: 0, event_flags: 128 }, RowsQuery(RowsQueryEvent { query: "DELETE FROM test_tb WHERE id in (1,2)" })), (EventHeader { timestamp: 1704445717, event_type: 19, server_id: 1, event_length: 53, next_event_position: 0, event_flags: 0 }, TableMap(TableMapEvent { table_id: 90, database_name: "test_db", table_name: "test_tb", column_types: [3, 3], column_metas: [0, 0], null_bits: [true, true] })), (EventHeader { timestamp: 1704445717, event_type: 32, server_id: 1, event_length: 49, next_event_position: 0, event_flags: 0 }, DeleteRows(DeleteRowsEvent { table_id: 90, included_columns: [true, true], rows: [RowEvent { column_values: [Long(1), Long(3)] }, RowEvent { column_values: [Long(2), Long(3)] }] })), (EventHeader { timestamp: 1704445717, event_type: 16, server_id: 1, event_length: 27, next_event_position: 0, event_flags: 0 }, Xid(XidEvent { xid: 11 }))] })
header: EventHeader { timestamp: 1704445717, event_type: 33, server_id: 1, event_length: 77, next_event_position: 1110, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "36682cf3-a048-11ed-b4b3-0242ac110004:125757" })
header: EventHeader { timestamp: 1704445717, event_type: 2, server_id: 1, event_length: 104, next_event_position: 1214, event_flags: 0 }
data: Query(QueryEvent { thread_id: 8, exec_time: 0, error_code: 0, schema: "test_db", query: "TRUNCATE TABLE test_tb" })
header: EventHeader { timestamp: 1704445717, event_type: 33, server_id: 1, event_length: 77, next_event_position: 1291, event_flags: 0 }
data: Gtid(GtidEvent { flags: 1, gtid: "36682cf3-a048-11ed-b4b3-0242ac110004:125758" })
header: EventHeader { timestamp: 1704445717, event_type: 2, server_id: 1, event_length: 138, next_event_position: 1429, event_flags: 4 }
data: Query(QueryEvent { thread_id: 8, exec_time: 0, error_code: 0, schema: "test_db", query: "DROP TABLE `test_tb` /* generated by server */" })
Example 3: parse json column to string
fn parse_json_columns(data: EventData) {
let parse_row = |row: RowEvent| {
for column_value in row.column_values {
if let ColumnValue::Json(bytes) = column_value {
println!(
"json column: {}",
JsonBinary::parse_as_string(&bytes).unwrap()
)
}
}
};
match data {
EventData::WriteRows(event) => {
for row in event.rows {
parse_row(row)
}
}
EventData::DeleteRows(event) => {
for row in event.rows {
parse_row(row)
}
}
EventData::UpdateRows(event) => {
for (before, after) in event.rows {
parse_row(before);
parse_row(after);
}
}
_ => {}
}
}
- execute sqls
CREATE TABLE test_db_1.json_test(id INT AUTO_INCREMENT, json_col JSON, PRIMARY KEY(id));
SET autocommit=0;
INSERT INTO test_db_1.json_test VALUES (NULL, '{"k.1":1,"k.0":0,"k.-1":-1,"k.true":true,"k.false":false,"k.null":null,"k.string":"string","k.true_false":[true,false],"k.32767":32767,"k.32768":32768,"k.-32768":-32768,"k.-32769":-32769,"k.2147483647":2147483647,"k.2147483648":2147483648,"k.-2147483648":-2147483648,"k.-2147483649":-2147483649,"k.18446744073709551615":18446744073709551615,"k.18446744073709551616":18446744073709551616,"k.3.14":3.14,"k.{}":{},"k.[]":[]}');
INSERT INTO test_db_1.json_test VALUES (NULL, '{"中文":"😀"}');
commit;
- parsed json column values:
json column: {"k.0":0,"k.1":1,"k.-1":-1,"k.[]":[],"k.{}":{},"k.3.14":3.14,"k.null":null,"k.true":true,"k.32767":32767,"k.32768":32768,"k.false":false,"k.-32768":-32768,"k.-32769":-32769,"k.string":"string","k.2147483647":2147483647,"k.2147483648":2147483648,"k.true_false":[true,false],"k.-2147483648":-2147483648,"k.-2147483649":-2147483649,"k.18446744073709551615":18446744073709551615,"k.18446744073709551616":18446744073709552000}
json column: {"中文":"😀"}
Dependencies
~13–27MB
~453K SLoC