database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-26 12:21:12 +03:00
Code Activity

Implement the FILTER clause for aggregate function calls.

Browse Source 
This is SQL-standard with a few extensions, namely support for
subqueries and outer references in clause expressions.

catversion bump due to change in Aggref and WindowFunc.

David Fetter, reviewed by Dean Rasheed.
This commit is contained in:
Noah Misch
2013-07-16 20:15:36 -04:00
parent 7a8e9f298e
commit b560ec1b0d
35 changed files with 403 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/backend/nodes/nodeFuncs.c
View File

@ -1570,6 +1570,8 @@ expression_tree_walker(Node *node,
if (expression_tree_walker((Node *) expr->aggdistinct,
walker, context))
return true;
if (walker((Node *) expr->aggfilter, context))
return true;
}
break;
case T_WindowFunc:
@ -1580,6 +1582,8 @@ expression_tree_walker(Node *node,
if (expression_tree_walker((Node *) expr->args,
walker, context))
return true;
if (walker((Node *) expr->aggfilter, context))
return true;
}
break;
case T_ArrayRef:
@ -2079,6 +2083,7 @@ expression_tree_mutator(Node *node,
MUTATE(newnode->args, aggref->args, List *);
MUTATE(newnode->aggorder, aggref->aggorder, List *);
MUTATE(newnode->aggdistinct, aggref->aggdistinct, List *);
MUTATE(newnode->aggfilter, aggref->aggfilter, Expr *);
return (Node *) newnode;
}
break;
@ -2089,6 +2094,7 @@ expression_tree_mutator(Node *node,
FLATCOPY(newnode, wfunc, WindowFunc);
MUTATE(newnode->args, wfunc->args, List *);
MUTATE(newnode->aggfilter, wfunc->aggfilter, Expr *);
return (Node *) newnode;
}
break;
@ -2951,6 +2957,8 @@ raw_expression_tree_walker(Node *node,
return true;
if (walker(fcall->agg_order, context))
return true;
if (walker(fcall->agg_filter, context))
return true;
if (walker(fcall->over, context))
return true;
/* function name is deemed uninteresting */