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sql/catalog: avoid making copies of table descriptors
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Previously, we would copy table descriptors even if no
PostDeserialization changes would apply eagerly. This could lead to
extra over head when accessing a large number of tables in the
pg_catalog tables. To address this, this patch will make a copy only if
we need to modify the original descriptor because of a post
deserialization change.

Fixes: #121579

Release note: None
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@fqazi
fqazi committed Aug 2, 2024
1 parent 65aa1e3 commit 9e71096
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