La fonction AI_EMBEDDING convertit des données textuelles ou visuelles en vecteur.
Syntaxe
VECTOR AI_EMBEDDING(
STRING <model_name>,
STRING <version_name>,
STRING <input>
[, STRING <model_parameters>]
)
Paramètres
model_name : Obligatoire. Chaîne (STRING) indiquant le modèle à utiliser. Pour plus d'informations, consultez la rubrique SQL AI Function.
version_name : Obligatoire. Chaîne (STRING) spécifiant la version du modèle. Pour utiliser la version par défaut, définissez
DEFAULT_VERSION.-
input : Obligatoire. Données à convertir. Les types de données suivants sont pris en charge :
STRING : Texte à convertir en vecteur.
BINARY : Données binaires issues d'OSS (utilisées avec la fonction GET_DATA_FROM_OSS).
-
model_parameters : Facultatif. Type STRING. Spécifie les paramètres du modèle, tels que
max_tokens,temperatureettop_p. Le format attendu est une chaîne JSON :'{"max_tokens": 500, "temperature": 0.6, "top_p": 0.95}'.max_tokens : Nombre maximal de jetons à générer lors d'un seul appel au modèle. Pour les modèles publics MaxCompute, la valeur par défaut est 4 096.
temperature : Valeur comprise entre 0 et 1 qui contrôle l'aléatoire de la sortie. Une valeur élevée produit des résultats plus créatifs et diversifiés, tandis qu'une valeur faible génère des sorties plus déterministes et conservatrices.
top_p : Valeur comprise entre 0 et 1 qui limite la plage des étiquettes candidates que le modèle peut sélectionner. Une valeur plus élevée autorise une gamme plus large et une plus grande diversité, alors qu'une valeur plus basse restreint la sélection pour obtenir des résultats plus ciblés.
Valeur de retour
Renvoie une valeur de type VECTOR. Bien que la dimension du vecteur soit configurable, le type courant est VECTOR(FLOAT, 1024), correspondant à un tableau de nombres à virgule flottante de 1 024 dimensions. Cette valeur représente la forme vectorisée des données textuelles ou visuelles en entrée.
Si la valeur d'entrée est NULL ou une chaîne vide, la fonction renvoie NULL.
Si l'entrée n'est pas de type STRING ou BINARY, la fonction renvoie une erreur.
Exécutez la commande SET odps.sql.ai.embedding.dimension = 256; pour définir la dimension du vecteur d'embedding renvoyé par la fonction.
Exemples
Exemple 1 : Générer un vecteur de texte avec text-embedding-v4
SET odps.namespace.schema=true;
SELECT AI_EMBEDDING(
bigdata_public_modelset.default.`text-embedding-v4`,
DEFAULT_VERSION,
'MaxCompute (formerly ODPS) is a fast, fully managed, multi-tenant big data processing platform that can process data at the TB to PB scale. MaxCompute provides multiple computing models, including SQL, MapReduce, Graph, and machine learning. It uses a serverless architecture and can automatically perform elastic scaling of computing resources based on workload, without requiring users to manage infrastructure. The platform is deeply integrated with Alibaba Cloud services such as DataWorks (data development), PAI (machine learning platform), and Quick BI (data visualization).'
) AS EMBEDDING
;
+-----------+
| embedding |
+-----------+
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0.00948181] |
+-----------+
Exemple 2 : Traiter des données multimodales avec qwen3-vl-embedding
Téléchargez les images e-commerce sur OSS. Cet exemple utilise 50 affiches produits issues du jeu de données public Alibaba Cloud Tianchi : Poster Design Text and Image Dataset.
-
Créez une table objet.
-- Enable the three-layer model SET odps.namespace.schema=true; CREATE OBJECT TABLE IF NOT EXISTS image_demo WITH SERDEPROPERTIES ('odps.properties.rolearn'='acs:ram::11**370:role/aliyunodpsdefaultrole') LOCATION 'oss://oss-cn-hangzhou-internal.aliyuncs.com/qijuan-bucket/photo/poster_11/'; ALTER TABLE image_demo REFRESH METADATA; SELECT COUNT(*) AS ROW_COUNT FROM image_demo; +------------+ | row_count | +------------+ | 50 | +------------+ -
Appelez le modèle Model Studio qwen3-vl-embedding pour traiter les données binaires d'image.
SET odps.sql.ai.embedding.dimension = 256; SET odps.namespace.schema=true; SELECT key, ai_embedding( bigdata_public_modelset.default.`qwen3-vl-embedding`, DEFAULT_VERSION, image_binary ) as image_embedding from ( select GET_DATA_FROM_OSS( 'muze_project.default.image_demo', key ) as image_binary, key as key from muze_project.default.image_demo ) Limit 1; -- Returned result +------+-----------------+ | key | image_embedding | +------+-----------------+ | O1CN012qinii2KVuHBiDhZ5_!!2672389563-0-alimamacc.jpg | [0.0003754136, 0.04734562, -0.04436165, 0.06617778, -0.00628291, -0.06838813, -0.07895358, 0.07997034, -0.01888741, -0.07811365, 0.1178557, 0.1373951, 0.005310358, 0.09601746, 0.03823899, -0.0988467, -0.1755015, -0.07515179, -0.1755899, 0.02340757, -0.03963152, -0.09610587, 0.005056168, 0.05570073, 0.05760163, -0.01075334, -0.01340575, -0.1062735, -0.01304104, -0.1213038, -0.04668252, 0.02276657, -0.1294379, -0.001079616, -0.002848584, -0.08386055, 0.03812848, 0.008205912, -0.03355306, 0.01960577, -0.02195979, 0.0117922, -0.06144764, 0.02446854, 0.05508184, -0.1587029, 0.03523292, -0.09380711, -0.08200386, -0.0663104, 0.03678017, 0.009393973, -0.01564925, 0.05693853, -0.06082874, 0.04265969, 0.1003497, -0.01674337, 0.02451274, -0.09292297, 0.02119722, 0.0809871, -0.1238678, -0.05459556, -0.01836798, -0.01358258, 0.03109958, -0.02060043, 0.07161523, 0.02241291, -0.1177673, -0.09822781, 0.04774349, -0.1650687, 0.1407549, -0.04484793, 0.01221216, 0.03609496, -0.01081412, -0.009322137, -0.08275538, 0.02396016, -0.02937551, -0.007669903, -0.100615, 0.05132425, -0.07453289, -0.02566212, -0.03357517, -0.009742103, 0.02105355, 0.05331356, -0.08744131, 0.132886, -0.02884502, 0.02798299, 0.06308329, -0.01047704, 0.04195238, -0.01219006, 0.06361377, -0.008869016, -0.05145687, -0.02924289, 0.04186396, -0.007001273, -0.06728295, 0.01486458, -0.06648722, 7.08865e-05, -0.04659411, 0.09265773, 0.04955597, -0.004141637, 0.06078453, -0.03140903, 0.1207733, 0.008542989, -0.0165997, -0.1011455, 0.03165216, 0.01514087, -0.05897205, -0.08920959, 0.01524034, 0.02709885, 0.000991893, 0.08085448, 0.1293495, 0.04995383, -0.1000845, 0.0226229, 0.089298, -0.03273523, 0.1019412, 0.1101637, -0.001219835, -0.02398226, -0.02862399, 0.06104977, 0.02192664, -0.001776566, 0.02095409, -0.05702694, -0.03558658, 0.01377046, -0.02265605, -0.04960018, 0.06476316, 0.008498782, -0.01961683, -0.03311099, 0.04584259, 0.02165034, 0.03832741, 0.03996307, -0.04369855, 0.006459738, -0.06330433, -0.006459738, -0.04540052, 0.1090143, -0.01732912, -0.08571724, 0.04250497, 0.0491139, -0.08814862, -0.002001745, -0.02840295, -0.1573767, 0.03989676, -0.09031476, 0.008780601, 0.06224336, 0.04937914, -0.02780616, 0.01169273, 0.05052852, -0.009935508, 0.03412775, 0.04049355, -0.00637685, -0.09495649, 0.06259701, 0.004580943, 0.001950631, -0.04513528, 0.07731792, -0.03598444, 0.06940489, 0.06706192, 0.08430262, 0.03494558, -0.1180325, -0.03536554, -0.05278308, -0.01206849, -0.1465902, 0.05733639, 0.03737696, 0.03067961, 0.04062617, -0.11706, 0.05530287, 0.01146065, 0.08443524, 0.01742858, 0.01351627, -0.01708598, 0.02714306, -0.01518508, -0.1252825, 0.03974203, -0.1362458, -0.05375563, -0.04248286, 0.01930738, 0.05340197, -0.04137769, 0.06485157, -0.01140539, -0.04265969, 0.05870681, -0.02906606, -0.07899779, 0.0255295, 0.1053893, -0.01311841, 0.06644302, -0.01416832, 0.0023927, -0.05397666, -0.0784673, 0.007852256, 0.04299124, -0.0002819919, 0.1355385, 0.07020061, -0.005769005, 0.06250861, 0.03958731, -0.004611336, -0.01288632, 0.1067155, 0.03472454, -0.03967572, -0.02225819, 0.02643575, -0.01790381, 0.02621471, -0.03056909, -0.08253434, 0.05070535, -0.02793878, -0.003243684, -0.003149744] | +------+-----------------+