Fix: Cartodbfication failed with existing PK

This fixes #174
When a unique index and a primary key contraint existed for a column
named cartodb_id cartodbfy tried to add another PK constraint

scripts-available/CDB_CartodbfyTable.sql

@@ -504,7 +504,7 @@ BEGIN
     IF rec.atttypid IN (20,21,23) THEN
           
       -- And it's a unique primary key! Done!
-      IF rec.indisprimary AND rec.indisunique AND rec.attnotnull THEN
+      IF (rec.indisprimary OR rec.indisunique) AND rec.attnotnull THEN
         RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', Format('found good ''%s''', const.pkey);
         RETURN true;
 

test/CDB_CartodbfyTableTest.sql

@@ -319,6 +319,20 @@ SELECT CDB_CartodbfyTableCheck('test', 'Table with non unique and null cartodb_i
 SELECT cartodb_id, cartodb_id_0 from test;
 DROP TABLE test;
 
+CREATE TABLE test (
+  cartodb_id integer
+);
+CREATE UNIQUE INDEX "test_cartodb_id_key" ON test (cartodb_id);
+CREATE UNIQUE INDEX "test_cartodb_id_pkey" ON test (cartodb_id);
+ALTER TABLE test ADD CONSTRAINT "test_pkey" PRIMARY KEY USING INDEX test_cartodb_id_pkey;
+INSERT INTO test VALUES
+  (1),
+  (2),
+  (3);
+SELECT CDB_CartodbfyTableCheck('test', 'Table with primary key and unique index on it #174');
+SELECT cartodb_id from test;
+DROP TABLE test;
+
 CREATE TABLE test (
   name varchar,
   "first.value" integer,

test/CDB_CartodbfyTableTest_expect

@@ -103,6 +103,16 @@ Table with non unique and null cartodb_id #148 cartodbfied fine
 4|2
 DROP TABLE
 CREATE TABLE
+CREATE INDEX
+CREATE INDEX
+ALTER TABLE
+INSERT 0 3
+Table with primary key and unique index on it #174 cartodbfied fine
+1
+2
+3
+DROP TABLE
+CREATE TABLE
 INSERT 0 2
 Table with dots in name columns (cartodb #6114) cartodbfied fine
 one|1