gpload aftersql

gpload is a utility tool provided by Greenplum Database to load data from external sources into a Greenplum Database table. "aftersql" is a parameter that can be used in the gpload configuration file to specify a SQL command that needs to be executed after the data has been loaded into the table.

For example, let's say you have a gpload configuration file named "myload.yaml" that loads data from a CSV file named "data.csv" into a table named "mytable". You want to execute a SQL command to update some other table after the data has been loaded into "mytable". Here's how you can do it:

1. Edit the "myload.yaml" file and add the "aftersql" parameter as follows:

LOAD:
   SOURCE:
      LOCAL_HOSTNAME:
         - localhost
      PORT: 5432
      FILE:
         - data.csv
      FORMAT: csv
      DELIMITER: ','
   COLUMNS:
      - my_column
   TABLE: mytable
AFTERSQL: UPDATE some_other_table SET some_column = 'some_value';

2. Run the gpload command to load the data into "mytable" and execute the SQL command specified in "aftersql":

gpload -f myload.yaml

After the data has been loaded into "mytable", the SQL command specified in "aftersql" will be executed and the "some_column" in "some_other_table" will be updated to "some_value".