Split long SQL expression at delimiter

## Context I'm trying to import a dump that have some long lines (8k+ character) with SQL*Plus, so I face the error SP2-0027: Input is too long (> 2499 characters). This is a hard-coded limit and cannot be overcome. ## Expected solution I would like to stream my input in bash and to split lines longer than the expected width on the last , (comma) character. So I should have something like

cat my_dump.sql | *magic_command* | sqlplus system/oracle@xe

## Details 1. I know that newer version can accept lines up to 4999 characters but I still have lines longer (grep '.\{5000\}' my_dump.sql | wc -l) 2. It is not really feasible to update the dump by hand 3. I did try to use tr but this split every line wich I do not want 4. I did try to use fmt and fold but it does not seems to be possible to use a custom delimiter 5. I am currently looking on sed but I cannot seem to figure out a regexp that would "find the last match of , in the first 2500 characters if there is more than 2500 characters"