# Search

## Function

This API is used to search face statistics。

## Request Message

Table 1

Parameter | Range | Type | Description
--- | --- | --- | ---
MsgId | null |  |
Engine | 0 | int | Which search engine to use, 0 or 1, used in conjunction with the search interface
StartTime |  | string | Start time like:"2020-07-12 00:00:00"
EndTime |  | string | End time such as:"2020-07-12 23:59:59"
Chn | [0, 1, 2, 3, 4, 5, 6, 7, 8] | array | The channel to search, the value represents the channel
Group | [1, 2, 5, 9, 13….] | array | The group to search, the value represents the group Id of the selected group, if it is empty, search all (including deleted groups)

Sample:

    POST API/AI/FaceStatistics/Search HTTP/1.1

    {
    	"version":"1.0",
    	"data": {
    		"MsgId": null,
    		"Engine": 0,
    		"StartTime": "2018-10-20 00:00:00",
    		"EndTime": "2018-10-28 23:59:59",
    		"Chn": [0, 1, 2, 3, 4, 5, 6, 7, 8],
    		"Group": [1, 2, 5, 9, 13]
    	}
    }

## Response Message

## Parameter Description

Table 2

Parameter | Range | Type | Description
--- | --- | --- | ---
MsgId | null |  |
Result | 0 | int | Face statistical information search, see the results Table 3
channel_max |  | int | Maximum number of channels
Count |  | int | The actual number of face statistical information

Table 3

Result Type | COMMENT
--- | ---
AORT_SUCCESS = 0 | Success
AORT_NO_DB = -1 | No database
AORT_DB_EXEC_FAILED = -2 | Database execution failed
AORT_CALC_FEATURE_FAILED = -3 | Feature extraction failed
AORT_CANCELED = -4 | Cancelled
AORT_NO_DISK = -5 | No hard drive
AORT_DISK_ERROR = -6 | Hard disk error
AORT_EXIST = -7 | Existed
AORT_GROUP_INVALID = -8 | Group invalid
AORT_NOT_EXIST = -9 | Does not exist
AORT_MORE_FILE_EXIST = -10 | File already exists
AORT_SEARCH_ERROR = -11 | Search error
AORT_OVER_MAX_COUNT = -12 | Limit exceeded
AORT_UPDATING_FEATURE = -13 | Updating feature values
AORT_NO_USABLE_IPC = -14 | No IPC available for eigenvalue calculation
AORT_INVALID_PARAM = -15 | Invalid parameter
AORT_INVALID_FORMAT = -16 | Wrong format
AORT_INVALID_RES = -17 | Wrong resolution
AORT_INVALID_MEM = -18 | File too large error
AORT_CREAT_FAILED = -19 | Creation failed
AORT_MD5_NOT_MATCH = -20 | MD5 mismatch
AORT_POS_ERROR = -21 | Location error
AORT_SIZE_ERROR = -22 | Wrong size
AORT_NOT_READY = -23 | Not ready
AORT_INVALID_DB = -24 | Invalid database

Sample:

    HTTP/1.1 200 OK
    Content-Type: application/json

    {
        "data": {
            "MsgId": null,
            "Result": 0,
            "Count": 160000
        }
    }

## Error Code

See Response Messages Body and Common error_code for more information.