/usr/share/pgmodeler/schemas/sql/relationship.sch is in pgmodeler-common 0.8.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | # SQL definition for relationships
# PostgreSQL Version: 9.x
# CAUTION: Do not modify this file unless you know what you are doing.
# Code generation can be broken if incorrect changes are made.
%if {rel1n} %then
{constraints}
%end
#%if {relgen} %then
# [ALTER TABLE ] {table} [ INHERIT ] {ancestor-table}; $br $br
#%end
%if {relnn} %then
{table}
{constraints}
%end
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