Solr: When its safe to change field type


It's inevitable that at some time we have to field type: for example from tint to tlong or etc. So we need know whether it is safe or not to change the field type.

Case 1: field is stored-only(indexed=false)
Answer: It's safe.
After we change attributes from tinit to tlong: the field type of old data is still int(even after segment merge r optimize).
12345
23456

Case 2: field is also indexed
In most cases it's not.

when we






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