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Add datalog infrastructure for min aggregation function

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This patch adds an instruction to the datalog interpreter and
constructs a new AST node for min aggregation functions.

The compiler is currently still work in progress and depends on
changes made to the handling of simple joins and the preprocessor.

Signed-off-by: Alex Horn <t-alexh@microsoft.com>
This commit is contained in:
Alex Horn 2015-06-10 18:09:56 +01:00
parent 004bf1471f
commit 140fb7942d
11 changed files with 418 additions and 3 deletions
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71
src/test/dl_table.cpp
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@ -1,4 +1,4 @@
#ifdef _WINDOWS
#if defined(_WINDOWS) || defined(_CYGWIN)
#include "dl_context.h"
#include "dl_table.h"
#include "dl_register_engine.h"
@ -91,9 +91,78 @@ void test_dl_bitvector_table() {
test_table(mk_bv_table);
}
void test_table_min() {
std::cout << "----- test_table_min -----\n";
datalog::table_signature sig;
sig.push_back(2);
sig.push_back(4);
sig.push_back(8);
smt_params params;
ast_manager ast_m;
datalog::register_engine re;
datalog::context ctx(ast_m, re, params);
datalog::relation_manager & m = ctx.get_rel_context()->get_rmanager();
m.register_plugin(alloc(datalog::bitvector_table_plugin, m));
datalog::table_base* tbl = mk_bv_table(m, sig);
datalog::table_base& table = *tbl;
datalog::table_fact row, row1, row2, row3;
row.push_back(1);
row.push_back(2);
row.push_back(5);
// Group (1,2,*)
row1 = row;
row[2] = 6;
row2 = row;
row[2] = 5;
row3 = row;
table.add_fact(row1);
table.add_fact(row2);
table.add_fact(row3);
// Group (1,3,*)
row[1] = 3;
row1 = row;
row[2] = 7;
row2 = row;
row[2] = 4;
row3 = row;
table.add_fact(row1);
table.add_fact(row2);
table.add_fact(row3);
table.display(std::cout);
unsigned_vector group_by(2);
group_by[0] = 0;
group_by[1] = 1;
datalog::table_min_fn * min_fn = m.mk_min_fn(table, group_by, 2);
datalog::table_base * min_tbl = (*min_fn)(table);
min_tbl->display(std::cout);
row[1] = 2;
row[2] = 5;
SASSERT(min_tbl->contains_fact(row));
row[1] = 3;
row[2] = 4;
SASSERT(min_tbl->contains_fact(row));
dealloc(min_fn);
min_tbl->deallocate();
tbl->deallocate();
}
void tst_dl_table() {
test_dl_bitvector_table();
test_table_min();
}
#else
void tst_dl_table() {