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Db2 Federation 03 Db2 to SQL Server
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Can I ignore the sqlr_CA_built message?
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You can ignore the initial part of this message. The SQLR_CA_BUILT portion indicates that the SQLR_CA structure has already been built. This can occur as a result of a previous error.
These messages can be ignored. This message just indicates that there was an attempt to build the SQLCA structure (access plan manager) but it was already built. The function dumping the message was the sqlrl_userTempGetInfo (DB2 looking for Declared Global Temporary Table information).
What does sqlr_CA_built-1060 mean?
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The SQLR_CA_BUILT portion indicates that the SQLR_CA structure has already been built. This can occur as a result of a previous error. The “sqlcode: -1060” is the error that causes the problem. This results from a user without CONNECT privileges for your database trying to connect to the database.
What does sqlr_CA_built-1060 mean?
The SQLR_CA_BUILT portion indicates that the SQLR_CA structure has already been built. This can occur as a result of a previous error. The “sqlcode: -1060” is the error that causes the problem. This results from a user without CONNECT privileges for your database trying to connect to the database.
What is the meaning of SQL error-1060 logged?
What is the meaning of SQL error -1060 logged in db2diag.log file. This technote provides details on the error message sqlcode: -1060, which appears in the db2diag.log file. You can ignore the initial part of this message. The SQLR_CA_BUILT portion indicates that the SQLR_CA structure has already been built.
What is SQLCA Table 1?
Table 1. Fields of the SQLCA. The field names shown are those present in an SQLCA that is obtained via an INCLUDE statement. An eye catcher for storage dumps containing SQLCA. The sixth byte is L if line number information is returned from parsing an SQL routine, SQL trigger, or dynamic compound SQL statement.
What happens to the SQLCA when a severe error is reported?
When a severe error is reported, there are no additions to the SQLCA. If no severe error occurs, a deadlock error takes precedence over other errors. For all other errors, the SQLCA for the first negative SQL code is returned. If no negative SQL codes are detected, the SQLCA for the first warning (that is, positive SQL code) is returned.
Is db21018e a client-side error?
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DB21018E is a client-side error, it’s unlikely it will produces anything in the diagnostic log. @PanChao — any particular reason you don’t want to use LOAD? INSERT ing 4 million rows is rarely a good idea. @mustaccio Thanks for the suggestions.
What does the error db21018e mean?
sending the command to the backend process. DB21018E A system error occurred. The command line processor could no continue processing. initialized. configuration file. A DB2 instance could not be created or upgraded.
What is the error message when issuing db2iupdt or db2icrt command?
The following error message might be seen when issuing db2iupdt or db2icrt command: DB21018E A system error occurred. The command line processor could not continue processing. Update DBM cfg SYSADM_GROUP errcode = 8 DBI1281E The database manager configuration file could not be initialized.”
Why can’t I create or upgrade a DB2 instance?
A DB2 instance could not be created or upgraded. Refer to the log file for troubleshooting. Resolve the problem and try the command again. If the problem persists, contact your IBM service
Why do the IPC kernel values change when a DB2 instance starts?
9) It is possible that the IPC kernel parameter values changed when a DB2 instance is started do not persist when the system is rebooted. Ensure that the IPC Kernel parameter values and settings are set appropriately and accordingly to meet the requirement of the DB2.
How to disable hash join in DB2?
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Switching the degree of a query to 1 will force DB2 to not parallelize the query. “db2set DB2_HASH_JOIN=NO”. This will disable hash join, but that can impact performance of other queries too.
In the mean time, we’d like to know if, beside using hints or disabling hash join for everybody in the system, there still is a method to disable it for this single query. In the past (I believe this was still available with V9.1), setting Optimization Class below 5 would have disable Hash Join.
What is db2_hash_join in SQL Server?
Specifies hash join as a possible join method when compiling an access plan. DB2_HASH_JOIN must be tuned to get the best performance. Hash join performance is best if you can avoid hash loops and overflow to disk.
How do I tune db2_hash_join to improve performance?
DB2_HASH_JOIN must be tuned to get the best performance. Hash join performance is best if you can avoid hash loops and overflow to disk. To tune hash join performance, estimate the maximum amount of memory available for the sheapthres configuration parameter, and then tune the sortheap configuration parameter.
Are hash joins the fastest table join method?
Help Wanted! Tropashko notes that the hash joins may not be the fastest table join method and he removes them by unsetting the hash_join_enabled parameter and reviews the resulting nested loops table join method:
What is the best way to optimize hash join performance?
Hash join performance is best if you can avoid hash loops and overflow to disk. To tune hash join performance, estimate the maximum amount of memory available for the sheapthres configuration parameter, and then tune the sortheap configuration parameter.
References:
Messages “SQLCA has already been built” and SQL0952N were …
DB2 SQLCA has already been built in diag log – Blogger
DB2diag.log error: SQLCA has already been built – Oracle Forum
2468117 – Frequent “SQLCA has already been built” and …
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Questions just answered:
What is db2_hash_join in SQL Server?
How do I tune db2_hash_join to improve performance?
Are hash joins the fastest table join method?
What is the best way to optimize hash join performance?
How to disable hash join in DB2?
What does sqlr_CA_built-1060 mean?
What is the meaning of SQL error-1060 logged?
What is SQLCA Table 1?
What happens to the SQLCA when a severe error is reported?
What does sqlr_CA_built-1060 mean?
What does the error db21018e mean?
What is the error message when issuing db2iupdt or db2icrt command?
Why can’t I create or upgrade a DB2 instance?
Why do the IPC kernel values change when a DB2 instance starts?
Is db21018e a client-side error?
Can I ignore the sqlr_CA_built message?
db2 sqlca has already been built
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