Content-Type: application/json; charset=utf-8
"FunctionType": "Field operation function",
"MethodSignature": "f_rename(\"key1\", \"new key1\", \"key2\", \"new key2\", ...)",
"Description": "Call f_rename function to rename log field that meets condition",
"content": "hello world!"
"Script": "f_rename(\"content\",\"content_new\")",
"content_new": "hello world!"
"Description": "Rename the field content to content_new"
"content": "hello world!"
"Script": "f_rename(\"field\",\"content_new\")",
"content": "hello world!"
"Description": "Do not rename a field when the field does not exist."
"ArgumentType": "STRING",
"Description": "Log field name",
"ArgumentType": "STRING",
"Description": "The renamed field name",
"FunctionType": "Field operation function",
"MethodSignature": "f_keep(\"key1\", \"key2\", ....)",
"Description": "Call f_keep function to keep keep log field that meets condition",
"content": "hello world!",
"Script": "c_if(f_has(\"content\"), f_keep(\"content\", \"language\"))",
"content": "hello world!",
"Description": "If the content field exists, keep content field and language field"
"ArgumentType": "STRING",
"Description": "Keep log field name",