Entering content frame

 COMMANDSTATISTICS 

The system table COMMANDSTATISTICS describes SQL statements that are stored in the command cache, and also contains statistical information on the activities of these SQL statements collected since the last time the database instance was started. The command cache contains the SQL statements and their execution plans shared by different database sessions

COMMANDSTATISTICS

COMMANDID

CHAR(8) BYTE

ID of the SQL statement

INTERNAL

CHAR(3)

SQL statement generated implicitly by the database instance (YES|NO)

HASHVALUE

FIXED(10)

Hash value

HASHTABLESLOT

FIXED(5)

Slot in the hash table

STATUS

CHAR(10)

Status (PREPARING | PREPARED | INVALID)

USERNAME

CHAR(32)

Name of the database user

SCHEMANAME

CHAR(32)

Current schema when execution plan created

SQLMODE

CHAR(10)

SQL mode

ISOLATIONLEVEL

CHAR(3)

Isolation level

DATEFORMAT

CHAR(50)

Date and time format

MASSCOMMAND

CHAR(3)

Command can be used as an array command (YES|NO)

STATEMENTSIZE

FIXED(10)

Length of the SQL statement (bytes)

STATEMENT

LONG

SQL statement

PLANSIZE

FIXED(10)

Memory requirements of the execution plan (bytes)

PREPARECOUNT

FIXED(10)

Number of execution preparations

REFERENCECOUNT

FIXED(5)

Number of database sessions for which the SQL statement has been prepared for execution

CURRENTEXECUTECOUNT

FIXED(5)

Current number of executions

EXECUTECOUNT

FIXED(10)

Number of executions

PREPARETIME

FIXED(20)

Parse time (ms)

EXECUTETIME

FIXED(20)

Total duration of executions (ms)

AVGEXECUTETIME

FIXED(20)

Average execution time (ms)

MINEXECUTETIME

FIXED(20)

Minimum execution time (ms)

MAXEXECUTETIME

FIXED(20)

Maximum execution time (ms)

READROWCOUNT

FIXED(20)

Number of rows read

QUALIFIEDROWCOUNT

FIXED(20)

Number of qualified rows

VIRTUALREADCOUNT

FIXED(20)

Number of reads in the data cache

PHYSICALREADCOUNT

FIXED(20)

Number of reads in the data cache that triggered reads on the disk

FETCHROWCOUNT

FIXED(20)

Number of rows (in the result tables generated by the SQL statement) sent to the application

SUSPENDCOUNT

FIXED(20)

Number of suspends

WAITCOUNT

FIXED(20)

Number of waits caused by lock collisions

 

 

Leaving content frame