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AGG

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lizhen
2023-03-14 04:33:37 -07:00
parent 6c2ec6da1a
commit ae7631a4ab
17 changed files with 2645 additions and 495 deletions
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67
src/common/backend/parser/parse_agg.cpp
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@ -1816,6 +1816,73 @@ void build_trans_aggregate_fnexprs(int agg_num_inputs, int agg_num_direct_inputs
/* finalfn is currently never treated as variadic */
}
void build_aggregate_transfn_expr(Oid *agg_input_types, int agg_num_inputs, int agg_num_direct_inputs,
bool agg_variadic, Oid agg_state_type, Oid agg_input_collation, Oid transfn_oid,
Expr **transfnexpr)
{
Param *argp;
List *args;
FuncExpr *fexpr;
int i;
argp = makeNode(Param);
argp->paramkind = PARAM_EXEC;
argp->paramid = -1;
argp->paramtype = agg_state_type;
argp->paramtypmod = -1;
argp->paramcollid = agg_input_collation;
argp->location = -1;
args = list_make1(argp);
for (i = agg_num_direct_inputs; i < agg_num_inputs; i++) {
argp = makeNode(Param);
argp->paramkind = PARAM_EXEC;
argp->paramid = -1;
argp->paramtype = agg_input_types[i];
argp->paramtypmod = -1;
argp->paramcollid = agg_input_collation;
argp->location = -1;
args = lappend(args, argp);
}
fexpr = makeFuncExpr(transfn_oid, agg_state_type, args, InvalidOid, agg_input_collation, COERCE_EXPLICIT_CALL);
fexpr->funcvariadic = agg_variadic;
*transfnexpr = (Expr *)fexpr;
}
void build_aggregate_finalfn_expr(Oid *agg_input_types, int num_finalfn_inputs, Oid agg_state_type, Oid agg_result_type,
Oid agg_input_collation, Oid finalfn_oid, Expr **finalfnexpr)
{
Param *argp;
List *args;
int i;
argp = makeNode(Param);
argp->paramkind = PARAM_EXEC;
argp->paramid = -1;
argp->paramtype = agg_state_type;
argp->paramtypmod = -1;
argp->paramcollid = agg_input_collation;
argp->location = -1;
args = list_make1(argp);
for (i = 0; i < num_finalfn_inputs - 1; i++) {
argp = makeNode(Param);
argp->paramkind = PARAM_EXEC;
argp->paramid = -1;
argp->paramtype = agg_input_types[i];
argp->paramtypmod = -1;
argp->paramcollid = agg_input_collation;
argp->location = -1;
args = lappend(args, argp);
}
*finalfnexpr =
(Expr *)makeFuncExpr(finalfn_oid, agg_result_type, args, InvalidOid, agg_input_collation, COERCE_EXPLICIT_CALL);
}
/*
* Expand a groupingSets clause to a flat list of grouping sets.
* The returned list is sorted by length, shortest sets first.