/usr/share/kamailio/postgres/pdt-create.sql is in kamailio-postgres-modules 4.2.0-2+deb8u3.
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 | INSERT INTO version (table_name, table_version) values ('pdt','1');
CREATE TABLE pdt (
id SERIAL PRIMARY KEY NOT NULL,
sdomain VARCHAR(128) NOT NULL,
prefix VARCHAR(32) NOT NULL,
domain VARCHAR(128) DEFAULT '' NOT NULL,
CONSTRAINT pdt_sdomain_prefix_idx UNIQUE (sdomain, prefix)
);
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