Added mock test for zero vector insertion

.github/workflows/build.yml

@@ -52,7 +52,7 @@ jobs:
       - run: psql test -c 'alter database test set enable_seqscan = off'
 
       # setup the database for testing
-      - run: make installcheck REGRESS="pinecone_crud pinecone_medium_create" REGRESS_OPTS="--dbname=test --inputdir=./test --use-existing"
+      - run: make installcheck REGRESS="pinecone_crud pinecone_medium_create pinecone_zero_vector_insert" REGRESS_OPTS="--dbname=test --inputdir=./test --use-existing"
       - if: ${{ failure() }}
         run: cat regression.diffs
   # mac:

test/expected/pinecone_zero_vector_insert.out

@@ -0,0 +1,63 @@
+-- SETUP
+-- suppress output
+\o /dev/null
+delete from pinecone_mock;
+-- logging level
+SET client_min_messages = 'notice';
+-- flush each vector individually
+SET pinecone.vectors_per_request = 1;
+SET pinecone.requests_per_batch = 1;
+-- disable flat scan to force use of the index
+SET enable_seqscan = off;
+-- CREATE TABLE
+DROP TABLE IF EXISTS t;
+NOTICE:  table "t" does not exist, skipping
+CREATE TABLE t (id int, val vector(3));
+\o
+-- CREATE INDEX
+-- mock create index
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://api.pinecone.io/indexes', 'POST', $${
+        "name": "invalid",
+        "metric": "euclidean",
+        "dimension": 3,
+        "status": {
+                "ready": true,
+                "state": "Ready"
+        },
+        "host": "fakehost",
+        "spec": {
+                "serverless": {
+                        "cloud": "aws",
+                        "region": "us-west-2"
+                }
+        }
+}$$);
+-- mock describe index stats
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://fakehost/describe_index_stats', 'GET', '{"namespaces":{},"dimension":3,"indexFullness":0,"totalVectorCount":0}');
+INSERT INTO t (id, val) VALUES (2, '[0,0,0]');
+-- create index after insering 0 vector - Throws an error
+CREATE INDEX i2 ON t USING pinecone (val) WITH (spec = '{"serverless":{"cloud":"aws","region":"us-west-2"}}');
+ERROR:  Invalid vector: zero vector
+HINT:  Pinecone insists that dense vectors cannot be zero in all dimensions. I don't know why they do this to you even when your metric isn't cosine.
+-- Truncate the table to remove the values for creating an index successfully
+TRUNCATE TABLE t;
+-- create index
+CREATE INDEX i2 ON t USING pinecone (val) WITH (spec = '{"serverless":{"cloud":"aws","region":"us-west-2"}}');
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://fakehost/vectors/upsert',
+'{ "vectors":	[{
+			"id":	"000000000001",
+			"values":	[100, 1, 1],
+			"metadata":	{
+			}
+		}]
+        }', 
+        '{"upsertedCount":1}'
+);
+INSERT INTO t (id, val) VALUES (1, '[100,1,1]');
+INSERT INTO t (id, val) VALUES (2, '[0,0,0]');
+ERROR:  Invalid vector: zero vector
+HINT:  Pinecone insists that dense vectors cannot be zero in all dimensions. I don't know why they do this to you even when your metric isn't cosine.
+DROP TABLE t;

test/sql/pinecone_zero_vector_insert.sql

@@ -0,0 +1,68 @@
+-- SETUP
+-- suppress output
+\o /dev/null
+delete from pinecone_mock;
+-- logging level
+SET client_min_messages = 'notice';
+-- flush each vector individually
+SET pinecone.vectors_per_request = 1;
+SET pinecone.requests_per_batch = 1;
+-- disable flat scan to force use of the index
+SET enable_seqscan = off;
+-- CREATE TABLE
+DROP TABLE IF EXISTS t;
+CREATE TABLE t (id int, val vector(3));
+\o
+
+-- CREATE INDEX
+-- mock create index
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://api.pinecone.io/indexes', 'POST', $${
+        "name": "invalid",
+        "metric": "euclidean",
+        "dimension": 3,
+        "status": {
+                "ready": true,
+                "state": "Ready"
+        },
+        "host": "fakehost",
+        "spec": {
+                "serverless": {
+                        "cloud": "aws",
+                        "region": "us-west-2"
+                }
+        }
+}$$);
+
+-- mock describe index stats
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://fakehost/describe_index_stats', 'GET', '{"namespaces":{},"dimension":3,"indexFullness":0,"totalVectorCount":0}');
+
+
+INSERT INTO t (id, val) VALUES (2, '[0,0,0]');
+
+-- create index after insering 0 vector - Throws an error
+CREATE INDEX i2 ON t USING pinecone (val) WITH (spec = '{"serverless":{"cloud":"aws","region":"us-west-2"}}');
+
+-- Truncate the table to remove the values for creating an index successfully
+TRUNCATE TABLE t;
+
+-- create index
+CREATE INDEX i2 ON t USING pinecone (val) WITH (spec = '{"serverless":{"cloud":"aws","region":"us-west-2"}}');
+
+INSERT INTO pinecone_mock (url_prefix, method, response)
+VALUES ('https://fakehost/vectors/upsert',
+'{ "vectors":	[{
+			"id":	"000000000001",
+			"values":	[100, 1, 1],
+			"metadata":	{
+			}
+		}]
+        }', 
+        '{"upsertedCount":1}'
+);
+
+INSERT INTO t (id, val) VALUES (1, '[100,1,1]');
+INSERT INTO t (id, val) VALUES (2, '[0,0,0]');
+
+DROP TABLE t;