19.A PL/SQLprocedure queries only those columns of a redefined table that wereunchanged by theonline table redefinition.What happens to the PL/sql procedure after the online table redefinition?
pl/sql过程只查询经过重新定义的表的那些列，这些列没有被在线表重新定义。在线表重新定义后的pl/sql过程会发生什么情况?
A. It remainsvalid.
保持有效的
B. Itbecomes invalid for all options of online table redefinition but automaticallygets revalidated the next
time it isused.
C. Itbecomes invalid for all options of online table redefinition and isautomatically recompiled during
onlineredefinition of the table.
D. Itbecomes invalid only if the storage parameters have been modified and itautomatically gets
revalidatedthe next time it is used.
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