Vladimir Ozerov created IGNITE-6128:
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Summary: Binary: offsets might be skipped for constant-length
fields
Key: IGNITE-6128
URL: https://issues.apache.org/jira/browse/IGNITE-6128
Project: Ignite
Issue Type: Task
Components: binary
Affects Versions: 2.1
Reporter: Vladimir Ozerov
Fix For: 2.3
Currently we write offsets for every field. It could take 1, 2 or 4 bytes
depending on the data length of the object. Now suppose we have the following
class:
{code}
class MyClass {
int a;
String c;
long b;
int d;
int e;
}
{code}
Fields are always sorted in alphabetical order, so we will write them as
follows {{[a, b, c, d, e]}}, and their offsets would always be {{[0, 5, 14, X,
X+5]}}. As you see, instead of writing 5 offsets, it is enough to write only
one offset of a field, which follows another variable-length field. The rest
offsets could be saved to metadata.
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