This query won't work.
PUT /reviews/_mapping
{
"properties": {
"product_id": {
"type": "keyword"
}
}
}
The ignore_above
mapping parameter can be updated, for instance.
PUT /reviews/_mapping
{
"properties": {
"author": {
"properties": {
"email": {
"type": "keyword",
"ignore_above": 256
}
}
}
}
}