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branches/zip: row_upd_copy_columns(): Remove redundant code that was

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accidentally added in r1591, which introduced dfield_t::ext in order
to make the merge sort of fast index creation support externally
stored columns.

Initially, I tried to allocate the bit for dfield_t::ext from
dfield_t::len by making the length 31 bits and mapping UNIV_SQL_NULL
to something that would fit in it.  Then I decided that it would be
too risky.  The redundant check was part of the mapping.  The
condition may have been dfield_is_null() initially.

This is similar to the redundant code in row_sel_fetch_columns() that
was noticed by Sergey Petrunya on the MySQL internals list and removed
in r6285.  As far as I can tell, there are no redundant UNIV_SQL_NULL
assignments remaining after this change.
This commit is contained in:
marko 2009-12-09 07:51:00 +00:00
parent 91729dad10
commit 40e511749b
1 changed files with 0 additions and 3 deletions
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3
row/row0upd.c
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@ -1344,9 +1344,6 @@ row_upd_copy_columns(
data = rec_get_nth_field(rec, offsets,
column->field_nos[SYM_CLUST_FIELD_NO],
&len);
if (len == UNIV_SQL_NULL) {
len = UNIV_SQL_NULL;
}
eval_node_copy_and_alloc_val(column, data, len);
column = UT_LIST_GET_NEXT(col_var_list, column);