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/*======================================================================*/
/*= CHANGES AND UPDATES =*/
/*======================================================================*/
/*= date person file subject =*/
/*=--------------------------------------------------------------------=*/
/*= =*/
/*= 260493 hua table_operations.hc created =*/
/*= =*/
/*======================================================================*/
#include "collist.h"
#include "table.h"
#include "table_operations.h"
#include "bool.h"
void table_id (char t1 [], char t2 [])
{table *ta;
table *tb;
bool d;
create_tb;
gen_id;
close_tables;
. close_tables
{delete (ta);
delete (tb);
}.
. create_tb
{ta = new table ("", t1, d);
tb = new table ("", t2, d);
tb->add_column ("id", col_type_int);
for (int i = 0; i < ta->num_columns (); i++)
tb->add_column (ta->column_name [i], ta->column_type [i]);
}.
. gen_id
{for (int r = 0; r < ta->num_rows (); r++)
add_row_to_tb;
}.
. add_row_to_tb
{tb->append (0, r);
for (int c = 0; c < ta->num_columns (); c++)
write_column;
}.
. write_column
tb->append (c+1, ta->read_int (r, c)).
}
void table_join (char t1 [], char cols1 [],
char t2 [], char cols2 [],
char exp [],
char t3 [])
{table *ta;
table *tb;
table *tc;
collist *colsa;
collist *colsb;
open_tables;
open_collists;
create_tc;
exec_join;
close_tables;
. close_tables
{delete (ta);
delete (tb);
delete (tc);
}.
. open_tables
{bool d;
ta = new table ("", t1, d);
tb = new table ("", t2, d);
tc = new table ("", t3, d);
}.
. open_collists
{colsa = new collist (cols1);
colsb = new collist (cols2);
}.
. create_tc
{int c;
for (c = 0; c < colsa->num (); c++)
tc->add_column (ta->column_name [colsa->col (c)],
ta->column_type [colsa->col (c)]);
for (c = 0; c < colsb->num (); c++)
tc->add_column (tb->column_name [colsb->col (c)],
tb->column_type [colsb->col (c)]);
}.
. exec_join
{for (int ra = 0; ra < ta->num_rows (); ra++)
for (int rb = 0; rb < tb->num_rows (); rb ++)
test_join;
}.
. test_join
if (match)
append_tc.
. append_tc
{int i = 0;
int c;
for (c = 0; c < colsa->num (); c++)
tc->append (i++, ta->read_int (ra, colsa->col (c)));
for (c = 0; c < colsb->num (); c++)
tc->append (i++, tb->read_int (rb, colsb->col (c)));
}.
. match
(true).
}
void table_append (char t1 [], char t2 [])
{table *ta;
table *tb;
open_tables;
perform_append;
close_tables;
. close_tables
{delete (ta);
delete (tb);
}.
. open_tables
{bool d;
ta = new table ("", t1, d);
tb = new table ("", t2, d);
}.
. perform_append
{for (int r = 0; r < tb->num_rows (); r++)
for (int c = 0; c < tb->num_columns (); c++)
append_column;
}.
. append_column
ta->append (c, tb->read_int (r, c)).
}
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