[Bug] [elasticsearch7] es7 can not supoort keyword type

[fangxy-7010]

Search before asking

• I had searched in the issues and found no similar issues.

What happened

when script mode the field type is keword, throw not support

What you expected to happen

support keyword type field

How to reproduce

{
"job":{
"content":[
{
"reader":{
"parameter":{
"password":"",
"column":[
{
"name":"id",
"type":"int"
},
{
"name":"age",
"type":"int"
},
{
"name":"name",
"type":"VARCHAR"
}
],
"connection":[
{
"jdbcUrl":[
""
],
"table":[
"source_table"
]
}
],
"username":"drpeco"
},
"name":"mysqlreader"
},
"writer":{
"parameter":{
"password":"null",
"hosts":[
"***:9200"
],
"column":[
{
"name":"ids",
"type":"int"
},
{
"name":"age",
"type":"int"
},
{
"name":"name",
"type":"keyword"
}
],
"index":"flinkx_test",
"ids":[
"ids",
"age"
],
"username":"null"
},
"name":"elasticsearch7writer"
}
}
],
"setting":{
"speed":{
"bytes":0,
"channel":1
}
}
}
}

Anything else

No response

Version

master

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct