Support u64 version parts in SQL function semver_no_prerelease

Fixes #1839.

Author: carols10cents

migrations/2019-09-18-233204_fix_int_type_in_to_semver_no_prerelease/down.sql

@@ -0,0 +1,21 @@
+DROP FUNCTION to_semver_no_prerelease(text);
+DROP TYPE semver_triple;
+
+-- Restores the type and function to what they were created as in
+-- migrations/20170308140537_create_to_semver_no_prerelease/up.sql
+
+CREATE TYPE semver_triple AS (
+  major int4,
+  minor int4,
+  teeny int4
+);
+
+CREATE FUNCTION to_semver_no_prerelease(text) RETURNS semver_triple IMMUTABLE AS $$
+  SELECT (
+    split_part($1, '.', 1)::int4,
+    split_part($1, '.', 2)::int4,
+    split_part(split_part($1, '+', 1), '.', 3)::int4
+  )::semver_triple
+  WHERE strpos($1, '-') = 0
+  $$ LANGUAGE SQL
+;

migrations/2019-09-18-233204_fix_int_type_in_to_semver_no_prerelease/up.sql

@@ -0,0 +1,18 @@
+DROP FUNCTION to_semver_no_prerelease(text);
+DROP TYPE semver_triple;
+
+CREATE TYPE semver_triple AS (
+  major numeric,
+  minor numeric,
+  teeny numeric
+);
+
+CREATE FUNCTION to_semver_no_prerelease(text) RETURNS semver_triple IMMUTABLE AS $$
+  SELECT (
+    split_part($1, '.', 1)::numeric,
+    split_part($1, '.', 2)::numeric,
+    split_part(split_part($1, '+', 1), '.', 3)::numeric
+  )::semver_triple
+  WHERE strpos($1, '-') = 0
+  $$ LANGUAGE SQL
+;