Description:
Execute the get command and return a table sequence or a cursor.
Syntax:
es_get(fd, endpoint, entity，header)
Note:
The external library function (See External Library Guide) queries data through a get command and by default returns 10 records at most. There is no restriction about the number of returned records when the function queries a cursor or the ES system. If the JSON data in the result set contains multiple _index, they will be fully displayed. Parameter entity can be omitted.
Option:
|
@c |
Query a cursor and by default return all records |
|
@f |
Parameter entity can be a file |
Parameter:
|
fd |
A REST Client object |
|
endpoint |
Rest API address |
|
entity |
A parameter transmitted through http body, which is a JSON string or the name of JSON file |
|
header |
A variable parameter that passes http header; it is a key type JSON string |
Return value:
A table sequence/cursor
Example:
|
|
A |
|
|
1 |
=es_open("localhost:9200","user":"un1234") |
Connect to ES server. |
|
2 |
=es_get(A1, "/_cat/health") |
Display the health data retrieved from ES server by complete values. |
|
3 |
=es_get(A1, "/_cat/health?v") |
Display the health data retrieved from ES server by key values. |
|
4 |
=es_get(A1,"/accounts/person/1") |
Query the record where index is accounts, type is person and id is 1. |
|
5 |
=es_get@c(A1,"/accounts/person/_search") |
Query records where index is accounts and type is person via the cursor. |
|
6 |
=A5.fetch() |
Return records fetched from the cursor. |
|
7 |
=es_get(A1,"/person/_mget","{\"ids\":[\"1\",\"2\",\"5\"]}") |
Query in /person the records where ids is 1,2 and 5. |
|
8 |
=es_get@f(A1,"/person/_mget","D:/entity_docs_accounts.txt") |
Same as the previous. |
Note: Here’s the file entity_docs_accounts.txt:
{"ids" : ["1", "2", "5"]}