\pset null _null_ CREATE TABLE test (a serial, b uri); INSERT INTO test (b) VALUES ('http://www.postgresql.org/'), ('http://www.postgresql.org/docs/devel/static/xfunc-sql.html#XFUNC-SQL-FUNCTION-ARGUMENTS'), ('https://duckduckgo.com/?q=postgresql&ia=about'), ('ftp://ftp.gnu.org/gnu/bison'), ('mailto:foo@example.com'), ('ssh://username@review.openstack.org:29418/openstack/nova.git'), ('http://admin:password@192.168.0.1'), ('http://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html'), ('http://[1080::8:800:200C:417A]/foo'), (''), ('foobar'); SELECT * FROM test; a | b ----+----------------------------------------------------------------------------------------- 1 | http://www.postgresql.org/ 2 | http://www.postgresql.org/docs/devel/static/xfunc-sql.html#XFUNC-SQL-FUNCTION-ARGUMENTS 3 | https://duckduckgo.com/?q=postgresql&ia=about 4 | ftp://ftp.gnu.org/gnu/bison 5 | mailto:foo@example.com 6 | ssh://username@review.openstack.org:29418/openstack/nova.git 7 | http://admin:password@192.168.0.1 8 | http://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html 9 | http://[1080::8:800:200C:417A]/foo 10 | 11 | foobar (11 rows) -- error cases SELECT uri ':'; ERROR: invalid input syntax for type uri at or near ":" LINE 1: SELECT uri ':'; ^ SELECT uri 'foo bar'; ERROR: invalid input syntax for type uri at or near " bar" LINE 1: SELECT uri 'foo bar'; ^ \x on SELECT b AS uri, uri_scheme(b), uri_userinfo(b), uri_host(b), uri_host_inet(b), uri_port(b), uri_path(b), uri_query(b), uri_fragment(b) FROM test; -[ RECORD 1 ]-+---------------------------------------------------------------------------------------- uri | http://www.postgresql.org/ uri_scheme | http uri_userinfo | _null_ uri_host | www.postgresql.org uri_host_inet | _null_ uri_port | _null_ uri_path | {""} uri_query | _null_ uri_fragment | _null_ -[ RECORD 2 ]-+---------------------------------------------------------------------------------------- uri | http://www.postgresql.org/docs/devel/static/xfunc-sql.html#XFUNC-SQL-FUNCTION-ARGUMENTS uri_scheme | http uri_userinfo | _null_ uri_host | www.postgresql.org uri_host_inet | _null_ uri_port | _null_ uri_path | {docs,devel,static,xfunc-sql.html} uri_query | _null_ uri_fragment | XFUNC-SQL-FUNCTION-ARGUMENTS -[ RECORD 3 ]-+---------------------------------------------------------------------------------------- uri | https://duckduckgo.com/?q=postgresql&ia=about uri_scheme | https uri_userinfo | _null_ uri_host | duckduckgo.com uri_host_inet | _null_ uri_port | _null_ uri_path | {""} uri_query | q=postgresql&ia=about uri_fragment | _null_ -[ RECORD 4 ]-+---------------------------------------------------------------------------------------- uri | ftp://ftp.gnu.org/gnu/bison uri_scheme | ftp uri_userinfo | _null_ uri_host | ftp.gnu.org uri_host_inet | _null_ uri_port | _null_ uri_path | {gnu,bison} uri_query | _null_ uri_fragment | _null_ -[ RECORD 5 ]-+---------------------------------------------------------------------------------------- uri | mailto:foo@example.com uri_scheme | mailto uri_userinfo | _null_ uri_host | _null_ uri_host_inet | _null_ uri_port | _null_ uri_path | {foo@example.com} uri_query | _null_ uri_fragment | _null_ -[ RECORD 6 ]-+---------------------------------------------------------------------------------------- uri | ssh://username@review.openstack.org:29418/openstack/nova.git uri_scheme | ssh uri_userinfo | username uri_host | review.openstack.org uri_host_inet | _null_ uri_port | 29418 uri_path | {openstack,nova.git} uri_query | _null_ uri_fragment | _null_ -[ RECORD 7 ]-+---------------------------------------------------------------------------------------- uri | http://admin:password@192.168.0.1 uri_scheme | http uri_userinfo | admin:password uri_host | 192.168.0.1 uri_host_inet | 192.168.0.1 uri_port | _null_ uri_path | {} uri_query | _null_ uri_fragment | _null_ -[ RECORD 8 ]-+---------------------------------------------------------------------------------------- uri | http://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html uri_scheme | http uri_userinfo | _null_ uri_host | FEDC:BA98:7654:3210:FEDC:BA98:7654:3210 uri_host_inet | fedc:ba98:7654:3210:fedc:ba98:7654:3210 uri_port | 80 uri_path | {index.html} uri_query | _null_ uri_fragment | _null_ -[ RECORD 9 ]-+---------------------------------------------------------------------------------------- uri | http://[1080::8:800:200C:417A]/foo uri_scheme | http uri_userinfo | _null_ uri_host | 1080::8:800:200C:417A uri_host_inet | 1080::8:800:200c:417a uri_port | _null_ uri_path | {foo} uri_query | _null_ uri_fragment | _null_ -[ RECORD 10 ]+---------------------------------------------------------------------------------------- uri | uri_scheme | _null_ uri_userinfo | _null_ uri_host | _null_ uri_host_inet | _null_ uri_port | _null_ uri_path | {} uri_query | _null_ uri_fragment | _null_ -[ RECORD 11 ]+---------------------------------------------------------------------------------------- uri | foobar uri_scheme | _null_ uri_userinfo | _null_ uri_host | _null_ uri_host_inet | _null_ uri_port | _null_ uri_path | {foobar} uri_query | _null_ uri_fragment | _null_ \x off SELECT DISTINCT b FROM test ORDER BY b; b ----------------------------------------------------------------------------------------- foobar ftp://ftp.gnu.org/gnu/bison http://[1080::8:800:200C:417A]/foo http://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:80/index.html http://admin:password@192.168.0.1 http://www.postgresql.org/ http://www.postgresql.org/docs/devel/static/xfunc-sql.html#XFUNC-SQL-FUNCTION-ARGUMENTS https://duckduckgo.com/?q=postgresql&ia=about mailto:foo@example.com ssh://username@review.openstack.org:29418/openstack/nova.git (11 rows)