If a large percentage of the 8000 or so records in SRCFILE are going to end up as new data to be inserted into the table, then you will save A LOT of time by moving those records into a separate plain text file that can be "bulk-loaded" into the table by whatever means is provided in your particulat DBMS (e.g. "sqlload" in Oracle, "mysqlimport" or some such). Single-record-at-a-time inserts with DBI are painfully slow compared to a native DBMS utility that is already optimized for inserting/appending large quantities of data into tables.

Follow the advice given in the first reply -- do one query at the outset to find out what records are already in the table -- then open SRCFILE for input, open some other file for output, and for each line of input, write a suitable data line to output if the corresponding record needs to be added to the table. After output file is fully written, run the bulk-loader utility of choice for DBMS to add that data to the table (this can be done from within the same perl script that writes the file).

In reply to Re: DBI - need for speed by graff
in thread DBI - need for speed by with.a.twist

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