MySQL 5.6.14 Source Code Document
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
Public Types | Public Attributes | List of all members
Dbtc::ScanRecord Struct Reference

#include <Dbtc.hpp>

Collaboration diagram for Dbtc::ScanRecord:
Collaboration graph
[legend]

Public Types

enum  ScanState {
  IDLE = 0, WAIT_SCAN_TAB_INFO = 1, WAIT_AI = 2, WAIT_FRAGMENT_COUNT = 3,
  RUNNING = 4, CLOSING_SCAN = 5
}

Public Attributes

ScanState scanState
DLList< ScanFragRec >::Head m_running_scan_frags
union {
   Uint32   m_queued_count
   Uint32   scanReceivedOperations
}; 
DLList< ScanFragRec >::Head m_queued_scan_frags
DLList< ScanFragRec >::Head m_delivered_scan_frags
Uint32 scanNextFragId
Uint32 scanNoFrag
Uint32 nextScan
union {
   Uint32   scanAiLength
   Uint32   m_booked_fragments_count
}; 
Uint32 scanKeyLen
Uint32 scanApiRec
Uint32 scanTcrec
Uint32 scanParallel
Uint32 scanSchemaVersion
Uint32 scanStoredProcId
Uint32 scanTableref
Uint32 m_scan_cookie
union {
   Uint16   first_batch_size_rows
   Uint16   batch_size_rows
}; 
Uint32 batch_byte_size
Uint32 m_scan_block_no
Uint32 scanRequestInfo
bool m_close_scan_req
bool m_pass_all_confs
bool m_4word_conf

Detailed Description

Each scan allocates one ScanRecord to store information about the current scan

Definition at line 1160 of file Dbtc.hpp.

Member Enumeration Documentation

enum Dbtc::ScanRecord::ScanState

NOTE! This is the old comment for ScanState. - MASV STATE TRANSITIONS OF SCAN_STATE. SCAN_STATE IS THE STATE VARIABLE OF THE RECEIVE AND DELIVERY PROCESS. THE PROCESS HAS THREE STEPS IT GOES THROUGH. 1) THE INITIAL STATES WHEN RECEIVING DATA FOR THE SCAN.

  • WAIT_SCAN_TAB_INFO
  • WAIT_AI
  • WAIT_FRAGMENT_COUNT 2) THE EXECUTION STATES WHEN THE SCAN IS PERFORMED.
  • SCAN_NEXT_ORDERED
  • DELIVERED
  • QUEUED_DELIVERED 3) THE CLOSING STATE WHEN THE SCAN PROCESS IS CLOSING UP EVERYTHING.
  • CLOSING_SCAN INITIAL START WHEN SCAN_TABREQ RECEIVED -> WAIT_SCAN_TAB_INFO (IF ANY SCAN_TABINFO TO BE RECEIVED) -> WAIT_AI (IF NO SCAN_TAB_INFO BUT ATTRINFO IS RECEIVED) -> WAIT_FRAGMENT_COUNT (IF NEITHER SCAN_TABINFO OR ATTRINFO RECEIVED)

WAIT_SCAN_TAB_INFO TRANSITIONS: -> WAIT_SCAN_TABINFO (WHEN MORE SCAN_TABINFO RECEIVED) -> WAIT_AI (WHEN ATTRINFO RECEIVED AFTER RECEIVING ALL SCAN_TABINFO) -> WAIT_FRAGMENT_COUNT (WHEN NO ATTRINFO RECEIVED AFTER RECEIVING ALL SCAN_TABINFO ) WAIT_AI TRANSITIONS: -> WAIT_AI (WHEN MORE ATTRINFO RECEIVED) -> WAIT_FRAGMENT_COUNT (WHEN ALL ATTRINFO RECEIVED)

WAIT_FRAGMENT_COUNT TRANSITIONS: -> SCAN_NEXT_ORDERED

SCAN_NEXT_ORDERED TRANSITIONS: -> DELIVERED (WHEN FIRST SCAN_FRAGCONF ARRIVES WITH OPERATIONS TO REPORT IN IT) -> CLOSING_SCAN (WHEN SCAN IS CLOSED BY SCAN_NEXTREQ OR BY SOME ERROR)

DELIVERED TRANSITIONS: -> SCAN_NEXT_ORDERED (IF SCAN_NEXTREQ ARRIVES BEFORE ANY NEW OPERATIONS TO REPORT ARRIVES) -> QUEUED_DELIVERED (IF NEW OPERATION TO REPORT ARRIVES BEFORE SCAN_NEXTREQ) -> CLOSING_SCAN (WHEN SCAN IS CLOSED BY SCAN_NEXTREQ OR BY SOME ERROR)

QUEUED_DELIVERED TRANSITIONS: -> DELIVERED (WHEN SCAN_NEXTREQ ARRIVES AND QUEUED OPERATIONS TO REPORT ARE SENT TO THE APPLICATION) -> CLOSING_SCAN (WHEN SCAN IS CLOSED BY SCAN_NEXTREQ OR BY SOME ERROR)

Definition at line 1216 of file Dbtc.hpp.

Member Data Documentation

bool Dbtc::ScanRecord::m_4word_conf

Send opcount/total len as different words

Definition at line 1289 of file Dbtc.hpp.

The documentation for this struct was generated from the following file: