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DoC: fix bug filter_by_negation when negation table has 0 columns

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Signed-off-by: Nuno Lopes <a-nlopes@microsoft.com>
This commit is contained in:
Nuno Lopes 2015-01-27 13:42:14 +00:00
parent 6ab167f0c7
commit 83bae6c8aa
1 changed files with 16 additions and 11 deletions
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27
src/muz/rel/udoc_relation.cpp
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@ -1090,7 +1090,7 @@ namespace datalog {
mk_remove_cols m_mk_remove_cols;
join_project_fn m_join_project;
bool m_is_subtract;
bool m_is_aliased;
//bool m_is_aliased;
public:
negation_filter_fn(const udoc_relation & t, const udoc_relation & neg, unsigned joined_col_cnt,
const unsigned *t_cols, const unsigned *neg_cols)
@ -1099,9 +1099,9 @@ namespace datalog {
m_mk_remove_cols(t, neg, m_remove_cols),
m_join_project(t, neg, joined_col_cnt, t_cols, neg_cols,
m_remove_cols.size(), m_remove_cols.c_ptr()),
m_is_subtract(false),
m_is_aliased(true) {
SASSERT(joined_col_cnt > 0);
m_is_subtract(false)//,
/*m_is_aliased(true) */{
SASSERT(joined_col_cnt > 0 || neg.get_signature().size() == 0);
m_is_subtract = (joined_col_cnt == t.get_signature().size());
m_is_subtract &= (joined_col_cnt == neg.get_signature().size());
svector<bool> found(joined_col_cnt, false);
@ -1119,20 +1119,24 @@ namespace datalog {
udoc_plugin& p = t.get_plugin();
IF_VERBOSE(3, t.display(verbose_stream() << "dst:"););
IF_VERBOSE(3, n.display(verbose_stream() << "neg:"););
if (!m_is_aliased && !t.fast_empty() && !n.fast_empty() && !p.m_disable_fast_pass) {
if (t.fast_empty() || n.fast_empty())
return;
/* TODO: double check
if (!m_is_aliased && !p.m_disable_fast_pass) {
// fast_pass(t, n);
}
if (m_is_subtract && !t.fast_empty() && !n.fast_empty()) {
*/
if (n.get_signature().size() == 0)
t.get_udoc().reset(t.get_dm());
else if (m_is_subtract)
t.get_udoc().subtract(t.get_dm(), n.get_udoc());
return;
}
if (!t.fast_empty() && !n.fast_empty()) {
else
slow_pass(t, n);
}
}
private:
/*
void fast_pass(udoc_relation& t, const udoc_relation& n) {
SASSERT(!m_is_aliased);
udoc & dst = t.get_udoc();
@ -1154,6 +1158,7 @@ namespace datalog {
}
std::swap(dst, result);
}
*/
void slow_pass(udoc_relation& t, udoc_relation const& n) {
doc_manager& dmt = t.get_dm();