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fbb11dac11
modification_statement::process_where_clause() assumes that both
operations and conditions has been added to the statement when it's
called: it uses this information to raise an error in case the statement
restrictions are incompatible with operations or conditions. Currently,
operations are set before this function is called, but not conditions.
This results in "Invalid restrictions on clustering columns since
the {} statement modifies only static columns" error while trying to
execute the following statements:
create table t(k int, c int, s int static, v int, primary key(k, c));
delete s from t where k=1 and c=1 if v=1;
update t set s=1 where k=1 and c=1 if v=1;
Fix this by always initializing conditions before processing WHERE
clause.