Dear Team,
I am using DB2 v10.5 and trying to load huge data using MERGE option ( 10-12 Million) using below query. Basically it loads data from staging to target . Staging table schemaname.Customer_Staging has 12 Million records . Runs for 25 Mins for just select query. But while doing merge (first time load) , it has to insert all records and below process is getting hanged after running 1.5-2 hrs (With No inserts)
HTML Code:
MERGE INTO schemaname.Customer_Table A
USING ( SELECT DISTINCT B.Name , B.CUST_ID, B.ORG_ID from schemaname.Customer_Staging B
WHERE (B.Name is not null and length(B.Name)>0) and (B.CUST_ID is not null and length(B.CUST_ID)>0) and (B.ORG_ID is NOT null and length(B.ORG_ID) > 0)) B
ON B.Name = A.Name and B.CUST_ID=A.CUST_ID and B.ORG_ID=A.ORG_ID and A.Load_dt is null
WHEN NOT MATCHED THEN INSERT (Name,CUST_ID,Load_dt,ORG_ID)
VALUES(B.Name,B.CUST_ID,current timestamp - current timeZone,B.ORG_ID);
DDL columns for both staging and Target is same .
Included Unique index for three columns Name,CUST_ID,ORG_ID using
Please can someone help how to tweak this query or use best approach.
any help appreciated
Thanks
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abc
def
ghi
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Discussion started by: green_k
7 Replies
LEARN ABOUT PHP
db2_client_info
DB2_CLIENT_INFO(3) 1 DB2_CLIENT_INFO(3)db2_client_info - Returns an object with properties that describe the DB2 database clientSYNOPSIS
object db2_client_info (resource $connection)
DESCRIPTION
This function returns an object with read-only properties that return information about the DB2 database client. The following table lists
the DB2 client properties:
DB2 client properties
+---------------------+--------------------------------------+---+
| Property name | | |
| | | |
| | Return type | |
| | | |
| | Description | |
| | | |
+---------------------+--------------------------------------+---+
| APPL_CODEPAGE | | |
| | | |
| | int | |
| | | |
| | The application code page. | |
| | | |
| CONN_CODEPAGE | | |
| | | |
| | int | |
| | | |
| | The code page for the current con- | |
| | nection. | |
| | | |
| DATA_SOURCE_NAME | | |
| | | |
| | string | |
| | | |
| | The data source name (DSN) used to | |
| | create the current connection to the | |
| | database. | |
| | | |
| DRIVER_NAME | | |
| | | |
| | string | |
| | | |
| | The name of the library that imple- | |
| | ments the DB2 Call Level Interface | |
| | (CLI) specification. | |
| | | |
| DRIVER_ODBC_VER | | |
| | | |
| | string | |
| | | |
| | The version of ODBC that the DB2 | |
| | client supports. This returns a | |
| | string "MM.mm" where $MM is the | |
| | major version and $mm is the minor | |
| | version. The DB2 client always | |
| | returns "03.51". | |
| | | |
| DRIVER_VER | | |
| | | |
| | string | |
| | | |
| | The version of the client, in the | |
| | form of a string "MM.mm.uuuu" where | |
| | $MM is the major version, $mm is the | |
| | minor version, and $uuuu is the | |
| | update. For example, "08.02.0001" | |
| | represents major version 8, minor | |
| | version 2, update 1. | |
| | | |
|ODBC_SQL_CONFORMANCE | | |
| | | |
| | string | |
| | | |
| | The level of ODBC SQL grammar sup- | |
| | ported by the client: | |
| | | |
| | o MINIMUM | |
| | - Supports the mini- | |
| | mum ODBC SQL gram- | |
| | mar. | |
| | | |
| | o CORE | |
| | - Supports the core | |
| | ODBC SQL grammar. | |
| | | |
| | o EXTENDED | |
| | - Supports extended | |
| | ODBC SQL grammar. | |
| | | |
| ODBC_VER | | |
| | | |
| | string | |
| | | |
| | The version of ODBC that the ODBC | |
| | driver manager supports. This | |
| | returns a string "MM.mm.rrrr" where | |
| | $MM is the major version, $mm is the | |
| | minor version, and $rrrr is the | |
| | release. The DB2 client always | |
| | returns "03.01.0000". | |
| | | |
+---------------------+--------------------------------------+---+
PARAMETERS
o $connection
- Specifies an active DB2 client connection.
RETURN VALUES
Returns an object on a successful call. Returns FALSE on failure.
EXAMPLES
Example #1
A db2_client_info(3) example
To retrieve information about the client, you must pass a valid database connection resource to db2_client_info(3).
<?php
$conn = db2_connect( 'SAMPLE', 'db2inst1', 'ibmdb2' );
$client = db2_client_info( $conn );
if ($client) {
echo "DRIVER_NAME: "; var_dump( $client->DRIVER_NAME );
echo "DRIVER_VER: "; var_dump( $client->DRIVER_VER );
echo "DATA_SOURCE_NAME: "; var_dump( $client->DATA_SOURCE_NAME );
echo "DRIVER_ODBC_VER: "; var_dump( $client->DRIVER_ODBC_VER );
echo "ODBC_VER: "; var_dump( $client->ODBC_VER );
echo "ODBC_SQL_CONFORMANCE: "; var_dump( $client->ODBC_SQL_CONFORMANCE );
echo "APPL_CODEPAGE: "; var_dump( $client->APPL_CODEPAGE );
echo "CONN_CODEPAGE: "; var_dump( $client->CONN_CODEPAGE );
}
else {
echo "Error retrieving client information.
Perhaps your database connection was invalid.";
}
db2_close($conn);
?>
The above example will output:
DRIVER_NAME: string(8) "libdb2.a"
DRIVER_VER: string(10) "08.02.0001"
DATA_SOURCE_NAME: string(6) "SAMPLE"
DRIVER_ODBC_VER: string(5) "03.51"
ODBC_VER: string(10) "03.01.0000"
ODBC_SQL_CONFORMANCE: string(8) "EXTENDED"
APPL_CODEPAGE: int(819)
CONN_CODEPAGE: int(819)SEE ALSO db2_server_info(3).
PHP Documentation Group DB2_CLIENT_INFO(3)