Hints: hashjoin build hint with build still shows warning

To repro (note: no CBO involved)

• CREATE Dataset:
  • CREATE DATASET IF NOT EXISTS route ON `travel-sample`.inventory.route;
  • CREATE DATASET IF NOT EXISTS airport ON `travel-sample`.inventory.airport

• \set -max-warnings 1;
• Run query: explain SELECT COUNT(DISTINCT r.destinationairport) FROM airport a JOIN route r ON r.sourceairport /*+ hashjoin build(r) */ = a.faa WHERE a.city = 'San Francisco' AND a.country = 'United States'

We see warning below:

	} ]

	,

	"plans":{},

	"warnings": [{ 

		"code": 24073,		"msg": "Could not apply hash join hint: build with r (in line 1, at column 125)"	} 

	],

	"status": "success",