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select 1, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail('LINESTRING (70 250, 190 340)')).*
) foo;
select 2, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail('LINESTRING (70 250, 70 250)')).*
) foo;
-- Twisted polygon
select 3, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail(
'POLYGON ((70 250, 70 500, 80 400, 40 400, 70 250))'
)).*
) foo;
-- Twisted polygon is also invalid for ESRI
select 4, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail(
'POLYGON ((70 250, 70 500, 80 400, 40 400, 70 250))'
,
1 -- ESRI flag
)).*
) foo;
-- Self-touching ring forming hole
select 5, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))'
,
0 -- No flags
)).*
) foo;
select '5s', ST_IsValid(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))' , 0);
select '5r', ST_IsValidReason(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))' , 0);
-- Self-touching ring forming hole with ESRI flag
select 6, valid, reason, st_astext(location) FROM (
SELECT (ST_IsValidDetail(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))'
,
1 -- ESRI flag
)).*
) foo;
select '6s', ST_IsValid(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))' , 1);
select '5r', ST_IsValidReason(
'POLYGON ((70 250, 40 500, 100 400, 70 250, 80 350, 60 350, 70 250))' , 1);
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