Restarts a previously halted index analysis started by an INITIATE INDEX ANALYSIS or RESTART INDEX ANALYSIS request that specified a checkpoint.
RESTART INDEX ANALYSIS is a Teradata extension to the ANSI SQL:2011 standard.
The privileges required to submit a RESTART INDEX ANALYSIS request are the following:
|You must have this privilege set …||On this table set in database QCD_name…|
The user who performs a RESTART INDEX ANALYSIS request must be the same user who performed the checkpointed INITIATE INDEX ANALYSIS request.
Normally invoked using the Teradata Index Wizard utility.
Rules for Performing RESTART INDEX ANALYSIS
The rules for using RESTART INDEX ANALYSIS and INITIATE INDEX ANALYSIS are the same. For more information, see Rules for Performing INITIATE INDEX ANALYSIS.
RESTART INDEX ANALYSIS Requires a Checkpoint
If you do not specify a CHECKPOINT clause in your INITIATE INDEX ANALYSIS request, then you cannot restart a previously halted index analysis.
If you are not satisfied with the outcome of a previously timed out INITIATE INDEX ANALYSIS request and want to extend the analysis with the intent of achieving better results, you can restart the analysis from the point at which it was stopped by specifying a CHECKPOINT rather than redoing the entire INITIATE INDEX ANALYSIS request from the beginning.
Actions Performed by RESTART INDEX ANALYSIS
RESTART INDEX ANALYSIS functions like INITIATE INDEX ANALYSIS, except that RESTART INDEX ANALYSIS begins its analysis with the first SQL request in the workload that was not checkpoint logged in the AnalysisLog table.
If the restart aborts for any reason before completion, the next RESTART INDEX ANALYSIS request begins its analysis with the first SQL request in the workload that was not checkpointed in the AnalysisLog table.
Once the restart completes successfully, index recommendations are written to the IndexRecommendations table within the specified QCD.
RESTART INDEX ANALYSIS Not Supported From Macros
You cannot specify a RESTART INDEX ANALYSIS request from a macro. If you execute a macro that contains a RESTART INDEX ANALYSIS request, the database aborts the request and returns an error.