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18 Cards in this Set
- Front
- Back
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DBQL is used for what
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Logging Historical query infomation.
Key use is to track SQL |
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How is information stored
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In cache, not released until cache is full, or end query logging is done.
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Can you do live reviews of sql using DBQL.
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Not built for that. Use PMON
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How is it invoked, revoked
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BEGIN QUERY LOGGING
END QUERY LOGGING |
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To who is it invoked
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by ALL users
by list of Users by List of Account Strings by User with 1 or more Account Strings |
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What is logged by default
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1 row per query with userid info and some stats on the query. There are options for MORE
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what is rate of cache to disk
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default is 10 minutes. DBSControl option "DBALFLUSHRATE" is used to set rate.
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Can dbql track tpump?
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Yes... TPUMP sends sql to Teradata.
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What are the components of DBQL and how are they implemented
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1 Security macro
several tables Install Dip script sets it up |
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Where are dbql logging rules kept
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DBC.DBQRuleTbl
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What is the view for DBC.DBQLogRuleTbl
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DBC.DBQL.LogRules
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What is required for a user to start or end Query logging
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Must have EXEC prifilege on DBC.DBQLAccessMacro
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What is the KEY table in DBQL
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DBC.DBQLogTbl
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How many rows are stored here?
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One row. Requests for more info is stored in other tables.
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When won't a record be inserted into the DBQLogTbl
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Use of Summary option
or a query finishes within a defined "THRESHOLD" |
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what is the recommended limit of how many users?
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100 user/account pairs per statement
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Where are default rows stored
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DBQLogTbl
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Is sql stored in LogTbl
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yes, default is 1st 200 characters.
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