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Commit 84307f73 authored by Wanxin Li's avatar Wanxin Li
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add create operator

parent 8254c646
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......@@ -57,15 +57,43 @@ Query
SelectQuery
: SELECT Body
{
printf("SelectQuery 1 \n");
$$ = $2;
}
| SELECT SelectList Body
{
printf("SelectQuery 2 \n");
$$ = create_proj_operator($2, $3);
}
| SELECT DISTINCT Body
{
printf("SelectList 3 \n");
$$ = $3;
}
| SELECT DISTINCT SelectList Body
{
printf("SelectList 4 \n");
$$ = create_proj_operator($2, $3);
}
;
Body
: FROM TableList
{
printf("Body 1 \n");
$$ = $2;
}
| FROM WHERE Pred
{
printf("Body 2 \n");
// todo
}
| FROM TableList WHERE Pred
{
printf("Body 3 \n");
$$ = create_eval_operator($4, $2);
}
;
TableList
......
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