View of the Main Log Table: QryLog[V] - Teradata Database

QryLog[V] Field

Description

AbortFlag

If the query being logged was aborted, the collected data could be incomplete.

Note: A query consisting of a multistatement or iterated request with simple INSERT statements can be successful and yet have statement errors, as indicated by the ErrorCode column.

AcctString

The account string at the time the row was committed. Because accounts can be changed dynamically at the query or session level, this may not be the same account that:

AcctStringDate

Value of the expanded &D ASE code in the account string. If none exists, the value is denoted with a “?” and is null.

Even if ASE truncates the expanded account string, DBQL will report the full value. For example, if &D is expanded into position 26 or higher in the account definition and truncation occurs, DBQL will still report the entire value of the date in the AcctStringDate field.

AcctStringHour

Value of the expanded &H ASE code in the account string. If none exists, the value is denoted with a “?” and is null.

AcctStringTime

Value of the expanded &T ASE code in the account string. If none exists, the value is denoted with a “?” and is null.

Even if ASE truncates the expanded account string, DBQL will report the full value.

AMPCPUTime

Total AMP time used for the query in CPU seconds.

Note: The I/O, CPU, and spool usage may not be accurate for aborted queries.

AMPCPUTimeNorm

Normalized AMP CPU seconds for co-existence systems.

AppID

Application (executable) or utility name; for example, BTEQ from LogonSource for network clients.

CacheFlag

This field is blank if the query is not found in the request cache. It could also be one of the following:

For more information on specific plans and generic plans, see “Peeking at Parameterized Values in the Data Parcel” in SQL Request and Transaction Processing.

CalendarName

The name of the business calendar the session uses. Possible values include ISO, COMPATIBLE, and TERADATA (the default).

CallNestingLevel

The level of nesting when running in stored procedures.

CheckpointNum

The checkpoint number when loading data into an MLOADX staging table. The default is zero.

ClientAddr

The client IP address of the submitted query as obtained from Logonsource from a network client.

ClientID

The network client user name under which this session is logged (for example, ADMIN) and the PK/FK for the table.

CollectTimeStamp

A date and time unique to each buffer cache, which changes for each new buffer. Part of the multi-column NUPI for the table (see also ProcID).

This time will be set when the cache is ready to receive new data, not when rows are written to the database.

For more information on CollectTimeStamp, see “Comparing CollectTimeStamp Value Between Tables” on page 380.

CPUDecayLevel

Contains the most severe decay level reached for CPU usage on any one node for requests using the default timeshare method in Priority Scheduler for SUSE Linux Enterprise Server 11 or above. Values are 0, 1, or 2.

DataCollectAlg

CPU/IO collection algorithm used by DBQL. Possible values include:

DBQLStatus

Internal DBQL logging status. Zero indicates no status conditions. This field is NULL if you are not using DBQL CPU/IO Collection
algorithm 3.

DefaultDatabase

Name of the default database for the query.

DelayTime

The number of seconds a request was delayed by workload management.

MinRespHoldTime

The number of seconds the request was held to meet the TASM minimum response time.

TotalFirstRespTime

The total time (in seconds) from when the request was submitted to when the first response was sent. Includes DelayTime and MinRespHoldTime.

DisCPUTime

Dispatcher CPU time in seconds.

DisCPUTimeNorm

Dispatcher normalized CPU time in seconds.

ElapsedTime

The time between when the query is submitted and when the first response is sent to the host.

ErrorCode

If greater than 0, this field is the number of the error message in ErrorText. This field contains a code if the query caused a Parser syntax error.

ErrorText

If not null, this field provides processing errors and Parser errors. For example, the text would explain that the query was not processed due to a Parser syntax error.

EstMaxRowCount

The largest number of rows handled by a single step in the query, as estimated by the Optimizer.

EstProcTime

Sum of minimum estimated processing time for steps in the query as generated by the Optimizer.

Note: This time is reported in seconds.

EstResultRows

Estimated result rows as generated by the Optimizer.

ExpandAcctString

The expanded account name under which the query is submitted if account expansion is invoked.

Note: The &I, which gives the host, session, and request number for the query is different for a stored procedure call. For stored procedure calls, the request number is the client request number which is the request of the CALL statement.

FirstRespTime

The timestamp when the first response packet is sent to the client unless the request is held by TASM to meet the minimum response time. In this case, it is the timestamp when the first response packet is ready to be sent to the client.

Note: There is a LastRespTime field, but it is NULL if you are not using DBQL CPU/IO Collection algorithm 3.

FirstStepTime

The timestamp when the first step is dispatched.

InternalRequestNum

The internal request number.

For commands, other than those within a stored procedure, the internal request number and the number in the RequestNum field will be the same.

For stored procedures invoked within a session, the internal request number increments by 1 for every request made by the stored procedure. This means that RequestNum will be the request number of the CALL and the value in InternalRequestNum will continue to increment for all other queries issued by the session.

IODecayLevel

Contains the most severe decay level reached for I/O usage on any one node for requests using the default timeshare method in Priority Scheduler for SUSE Linux Enterprise Server 11 or above. Values are 0, 1, or 2. A value of 0 indicates that the request is running at the default priority. A value of 1 indicates that the priority level is reduced and the resource allotment is halved. A value of 2 indicates that the priority level is reduced again, the resource allotment is halved again, and it will not be reduced more.

IterationCount

The number of data rows used by a parameterized request.

KeepFlag

Whether the response parcel should be kept until the client responds that it is no longer needed. The value is either Y or N.

LastRespTime

The timestamp of the last response. This field is NULL if you are not using DBQL CPU/IO Collection algorithm 3.

LockDelay

Maximum wait time to get a lock on an object in centiseconds. The maximum value is 32,767 centiseconds.

LockLevel

The highest lock level (Access/Read/Write/Exclusive) for locks associated with this request. For explicit transactions, the lock level for the transaction. Does not include row hash locks.

LogicalHostID

Unique identifier of the logon source for the logged query. A value of 0 indicates an internal session.

LogonDateTime

The timestamp of the start of the session.

LogonSource

The logon source string text. For more information, see the appendix on LogonSource column fields and examples in Data Dictionary.

LSN

The Logon Sequence Number used for a load utility.

MaxAMPCPUTime

CPU seconds of the highest CPU utilized AMP in the query.

MaxAMPCPUTimeNorm

Normalized maximum CPU seconds for an AMP.

MaxAmpIO

Logical I/O count of the highest utilized AMP in the query.

MaxCPUAmpNumber

The number of the AMP with the highest CPU activity.

MaxCPUAmpNumber
Norm

Number of the AMP with the maximum normalized CPU seconds for co-existence systems.

MaxIOAmpNumber

The number of the AMP with the highest I/O usage for this step.

MaxStepMemory

The maximum amount of memory in MBs used by any one AMP in any step in this request. This field can be compared with the TDWM estimated memory usage field, TDWMEstMemUsage, also in DBQLogTbl. This field does not apply to INSERT/UPDATE/DELETE requests.

MaxStepsInPar

The maximum number of Level 2 steps done in parallel for the query.

MinAmpCPUTime

CPU seconds of the lowest CPU utilized AMP in the query.

MinAmpCPUTimeNorm

Normalized minimum CPU seconds for an AMP.

Note: Normalized columns, such as MinAmpCPUTimeNorm, are for co-existence systems only.

NumFragments

For a request for which a dynamic plan is generated, this field indicates the number of plan fragments. For a static plan, this field is NULL.

NumOfActiveAMPs

Number of AMPs active for the query. Use it to compute the average CPU or I/O per AMP.

NumRequestCtx

The number of request contexts associated with the session.

NumResultRows

The total number of rows returned for the query.

For an Enhanced Statement Status (ESS) client, the value 18,446,744,073,709,551,615 could mean that number or higher.

Note: The value formatted as a decimal value is 18,446,744,073,709,551,616 due to float arithmetic.

For a non-ESS client, a warning message is returned if the actual activity count exceeds 4294967295.

The same value (modulo 2^32) is logged in the NumResultRows column.

The value 4294967295 along with the warning message indicates the actual counter is one of the following:

The maximum internal counter is 18,446,744,073,709,551,615.

The value 4294967295 or less, without the warning message, is the actual row count.

NumSteps

Total number of Level 1 steps required to process the query. The value is 0 if:

NumStepswPar

Total number of Level 1 steps with parallel steps.

ParserCPUTime

Total Parser and Dispatcher CPU seconds used for the query.

ParserCPUTimeNorm

Normalized parser CPU seconds for co-existence systems.

ParserExpReq

Seconds the parser waited on an express request.

PersistentSpool

Persistent portion of the SpoolUsage column.

ProcID

Unique processor ID of the Dispatcher and part of the multi-column NUPI for the table (see also CollectTimeStamp).

ProfileID

The name of the profile, if any, under which the user submitted the query.

ProxyRole

The rolename of a proxy connection.

ProxyUser

The username of a proxy connection.

ProxyUserID

The ID of the ProxyUser being charged for spool and temp space. If the field is NULL, the session user ID was used for spool and temp space.

QueryBand

The query band under which the query is submitted.

Possible values include:

QueryID

Internally generated identifier of the query and the FK to other DBQL tables.

Note: QueryID is a system-wide unique field; you can use QueryID to join DBQL tables or the DBC.TdwmExceptionLog table with DBQL tables without needing ProcID as an additional join field.

QueryRedriven

Whether the query was redriven if redrive protection was enabled. Possible values are:

QueryText

The first characters of the SQL query. Up to 200 characters are captured by default.

If you use the LIMIT SQLTEXT option, you can specify that the first n characters be captured where n is 0-10000.

ReDriveKind

Whether the query has redrive protection. Possible values are:

ReqIOKB

Total logical I/O usage in kilobytes.

ReqPhysIO

The number of physical I/Os.

ReqPhysIOKB

Total physical I/O usage in kilobytes.

RequestMode

Request mode from parcel request processing option:

RequestNum

Unique identifier of the query.

Note: The request number for the commands that occur within a stored procedure CALL statement will all appear as the same number of the CALL statement itself. For more information on request numbers for stored procedures, see note for ExpandAcctString.

SeqRespTime

Sum of the response time of all steps as if they had been executed sequentially, in seconds.

SessionID

Unique session identifier.

SessionTemporalQualifier

When a DML or SELECT request refers to a temporal table but omits a temporal qualifier, the system uses the value of the session temporal qualifier. This is the session temporal qualifier in effect when the query is logged. For more information on the qualifier, see ANSI Temporal Table Support and Temporal Table Support.

SpoolUsage

If you are using algorithm 3 (the DBQLogTbl DataCollectAlg field= 3), the peak spool usage in bytes for any step of the query.

For other algorithms, the maximum amount of spool used while processing the query.

If SpoolUsage is 0, then there is no usage. If it is null, the data on usage was not valid.

StartTime

The timestamp when the query is submitted.

StatementGroup

If there is a DDL statement in a request, StatementGroup reports which type:

If the statement has only one DML statement or multiple DML statements that are all of the same type, StatementGroup will indicate the type. For example if there are three DELETE statements in a request, StatementGroup will report:

DML DELETE

Similarly, for requests with individual or multiple INSERT, INSERT... SELECT, UPDATE or SELECT statements, StatementGroup will report:

In a multistatement request with different types of DML statements, you will see a list showing the number of statements of each type in the request. For example, a request with one insert and two update statements will appear as:

DML      Del=0   Ins=1   InsSel=0    Upd=2    Sel=0

Statements

Number of statements in a request:

StatementType

The type of statement of the query.

In a multistatement request, this is the last statement of the request. However, this may not accurately describe the request. For more statement information, see StatementGroup.

TacticalCPUException

The number of nodes that had a CPU exception for the request.

TacticalIOException

The number of nodes that had an I/O exception for the request.

TDWMEstMemUsage

The estimated memory used by the request (in megabytes). It represents the largest step in the request.

ThrottleBypassed

Whether an active request is active solely due to the ThrottleBypass ruleset attribute. This attribute overrides the throttle limits if the session owning the request has an object lock higher than the Access level. Possible values include:

TotalIOCount

Total logical I/O used by the query.

Note: The I/O, CPU, and spool usage may not be accurate for aborted queries.

TTGranularity

Possible values include:

For more information, see Temporal Table Support.

TxnMode

Transaction mode:

TxnUniq

The unique value within the transaction number. Other transaction number components (userid, procid) are already in DBQLogTbl. Combined with TxnUniq, these fields represent the complete transaction ID for the logged request.

UnitySQL

Possible values include:

UnityTime

Seconds the stored procedure request was processed by Unity.

UserID

The unique ID of the user whose query is logged.

UserName

Name under which the session being logged was initiated.

UtilityByteCount

The number of bytes transferred by MultiLoad or FastLoad insertion, updates, or deletions.

UtilityInfoAvailable

Indicates whether an SQL request has utility information available in DBQLUtilityTbl. Possible values include:

UtilityRowCount

The number of rows inserted, updated, and deleted by MultiLoad or FastLoad for target tables.

VHLogicalIO

VERYHOT logical I/O count per query.

VHLogicalIOKB

VERYHOT logical I/Os in KB per query.

VHPhysIO

VERYHOT physical I/O count per query (VERYHOT cylinder and data block I/Os that were handled by physical disk I/O).

VHPhysIOKB

VERYHOT physical I/Os in KB per query.

WarningOnly

Indicator if the error was only a warning. That is, warning mode.