storage: Change the limitation of vector dimension (pingcap#260)

Signed-off-by: “EricZequan” <[email protected]>

Author: EricZequan

Diff for: dbms/src/TiDB/Schema/TiDB.cpp

@@ -482,7 +482,7 @@ try
 
         auto dimension = vector_index_json->getValue<UInt64>("dimension");
         RUNTIME_CHECK(dimension > 0);
-        RUNTIME_CHECK(dimension <= 16000); // Just a protection
+        RUNTIME_CHECK(dimension <= 16383); // Just a protection
 
         tipb::VectorDistanceMetric distance_metric = tipb::VectorDistanceMetric::INVALID_DISTANCE_METRIC;
         ok = tipb::VectorDistanceMetric_Parse( //