1

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DROP TABLE IF EXISTS file_tree;

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DROP TABLE IF EXISTS inodes;

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DROP SEQUENCE IF EXISTS ino_seq;

     5

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CREATE SEQUENCE ino_seq START 64;

     7

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    ino int4 primary key DEFAULT nextval('ino_seq'::regclass), 

    12

    data oid,

    13

    link_path varchar(512)

    19

    ino int4 references inodes(ino) NOT NULL UNIQUE,

    20

    parent int4 references file_tree(ino)

    23

INSERT INTO inodes (ino, type, mode, data) VALUES 

    27

INSERT INTO file_tree (name, parent, ino) VALUES 

    31

CREATE OR REPLACE FUNCTION lo_size (oid) RETURNS int4 LANGUAGE SQL STABLE RETURNS NULL ON NULL INPUT AS 'select lo_lseek(lo_open($1, 262144), 0, 2);';

    32

CREATE OR REPLACE FUNCTION lo_pread (IN fd int4, IN len int4, IN "off" int4) RETURNS bytea LANGUAGE SQL STRICT AS 'select lo_lseek($1, $3, 0); select loread($1, $2);';

    33

CREATE OR REPLACE FUNCTION lo_pwrite (IN fd int4, IN buf bytea, IN "off" int4) RETURNS int4 LANGUAGE SQL STRICT AS 'select lo_lseek($1, $3, 0); select lowrite($1, $2);';

    34

CREATE OR REPLACE FUNCTION lo_otruncate (IN oid, IN len int4) RETURNS oid LANGUAGE SQL STRICT AS 'select lo_truncate(lo_open($1, 393216), $2); select $1;';

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CREATE OR REPLACE FUNCTION dbfs_size (type char, oid, link varchar) RETURNS int4 LANGUAGE SQL STABLE AS $$