SQL script conversion consumes all memory in sqlines

[renesugar]

sqlines runs until Mac OS kills the process after consuming all memory.

This SQL script reproduces the problem:

https://github.com/ktaranov/sqlserver-kit/blob/master/Scripts/AutoGuessingForeignKeyConstraints.sql

./sqlines -s=sql -t=postgresql -in=AutoGuessingForeignKeyConstraints.sql