7.15.33. vector_size¶
7.15.33.1. Summary¶
New in version 5.0.3.
vector_size returns the value of vector column size.
To enable this function, register functions/vector plugin by
the following command:
plugin_register functions/vector
7.15.33.3. Usage¶
Here is a schema definition and sample data.
Sample schema:
Execution example:
table_create Memos TABLE_HASH_KEY ShortText
# [[0, 1337566253.89858, 0.000355720520019531], true]
column_create Memos tags COLUMN_VECTOR ShortText
# [[0, 1337566253.89858, 0.000355720520019531], true]
Sample data:
Execution example:
load --table Memos
[
{"_key": "Groonga",          "tags": ["Groonga"]},
{"_key": "Rroonga",          "tags": ["Groonga", "Ruby"]},
{"_key": "Nothing"}
]
# [[0, 1337566253.89858, 0.000355720520019531], 3]
Here is the simple usage of vector_size function which returns tags and size - the value of tags column and size of it.
Execution example:
select Memos --output_columns 'tags, vector_size(tags)'
# [
#   [
#     0,
#     1337566253.89858,
#     0.000355720520019531
#   ],
#   [
#     [
#       [
#         3
#       ],
#       [
#         [
#           "tags",
#           "ShortText"
#         ],
#         [
#           "vector_size",
#           null
#         ]
#       ],
#       [
#         [
#           "Groonga"
#         ],
#         1
#       ],
#       [
#         [
#           "Groonga",
#           "Ruby"
#         ],
#         2
#       ],
#       [
#         [],
#         0
#       ]
#     ]
#   ]
# ]
7.15.33.4. Parameters¶
There is one required parameter, target.
7.15.33.4.1. target¶
Specifies a vector column of table that is specified by table parameter in select.
7.15.33.5. Return value¶
vector_size returns the value of target vector column size.