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postgres/src/include/parser/parse_agg.h

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Break parser functions into smaller files, group together.
29 years ago
/*-------------------------------------------------------------------------
*
* parse_agg.h
Fix parse_agg.c to detect ungrouped Vars in sub-SELECTs; remove code that used to do it in planner. That was an ancient kluge that was never satisfactory; errors should be detected at parse time when possible. But at the time we didn't have the support mechanism (expression_tree_walker et al) to make it convenient to do in the parser.
24 years ago
* handle aggregates in parser
Break parser functions into smaller files, group together.
29 years ago
*
Update copyright to 2002.
24 years ago
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
27 years ago
* Portions Copyright (c) 1994, Regents of the University of California
Break parser functions into smaller files, group together.
29 years ago
*
Implement outer-level aggregates to conform to the SQL spec, with extensions to support our historical behavior. An aggregate belongs to the closest query level of any of the variables in its argument, or the current query level if there are no variables (e.g., COUNT(*)). The implementation involves adding an agglevelsup field to Aggref, and treating outer aggregates like outer variables at planning time.
23 years ago
* $Id: parse_agg.h,v 1.26 2003/06/06 15:04:03 tgl Exp $
Break parser functions into smaller files, group together.
29 years ago
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_AGG_H
#define PARSE_AGG_H
Change #include's to use <> and "" as appropriate.
27 years ago
#include "parser/parse_node.h"
Break parser functions into smaller files, group together.
29 years ago
Implement outer-level aggregates to conform to the SQL spec, with extensions to support our historical behavior. An aggregate belongs to the closest query level of any of the variables in its argument, or the current query level if there are no variables (e.g., COUNT(*)). The implementation involves adding an agglevelsup field to Aggref, and treating outer aggregates like outer variables at planning time.
23 years ago
extern void transformAggregateCall(ParseState *pstate, Aggref *agg);
Fix parse_agg.c to detect ungrouped Vars in sub-SELECTs; remove code that used to do it in planner. That was an ancient kluge that was never satisfactory; errors should be detected at parse time when possible. But at the time we didn't have the support mechanism (expression_tree_walker et al) to make it convenient to do in the parser.
24 years ago
extern void parseCheckAggregates(ParseState *pstate, Query *qry);
Another pgindent run. Fixes enum indenting, and improves #endif spacing. Also adds space for one-line comments.
25 years ago
New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass.
25 years ago
#endif /* PARSE_AGG_H */