Class: MysqlReplicator::Binlogs::QueryEventParser

Inherits:
Object
  • Object
show all
Defined in:
lib/mysql_replicator/binlogs/query_event_parser.rb

Class Method Summary collapse

Class Method Details

.parse(payload, checksum_enabled) ⇒ Object 



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# File 'lib/mysql_replicator/binlogs/query_event_parser.rb', line 19

def self.parse(payload, checksum_enabled)
  offset = 0

  thread_id = MysqlReplicator::StringUtil.read_uint32(payload[offset, 4])
  offset += 4

  exec_time = MysqlReplicator::StringUtil.read_uint32(payload[offset, 4])
  offset += 4

  db_len = MysqlReplicator::StringUtil.read_uint8(payload[offset])
  offset += 1

  error_code = MysqlReplicator::StringUtil.read_uint16(payload[offset, 2])
  offset += 2

  # Skip status variables
  status_vars_len = MysqlReplicator::StringUtil.read_uint16(payload[offset, 2])
  offset += 2
  if status_vars_len > 0
    offset += status_vars_len
  end

  # Database name (null-terminated)
  if db_len > 0
    database = payload[offset, db_len]
    offset += db_len
  end

  # Skip null terminator for database name
  if offset < payload.length && payload[offset] == "\x00"
    offset += 1
  end

  # The rest is the SQL query
  if offset < payload.length
    # Remove checksum if present (last 4 bytes)
    sql_end = checksum_enabled ? -5 : -1
    sql = payload[offset..sql_end]
  end

  {
    thread_id: thread_id,
    exec_time: exec_time,
    error_code: error_code,
    database: database,
    sql: sql
  }
end