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Remove the Query structure from the executor's API. This allows us to stop

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storing mostly-redundant Query trees in prepared statements, portals, etc.
To replace Query, a new node type called PlannedStmt is inserted by the
planner at the top of a completed plan tree; this carries just the fields of
Query that are still needed at runtime.  The statement lists kept in portals
etc. now consist of intermixed PlannedStmt and bare utility-statement nodes
--- no Query.  This incidentally allows us to remove some fields from Query
and Plan nodes that shouldn't have been there in the first place.

Still to do: simplify the execution-time range table; at the moment the
range table passed to the executor still contains Query trees for subqueries.

initdb forced due to change of stored rules.
This commit is contained in:
Tom Lane
2007-02-20 17:32:18 +00:00
parent 71b0cf2f6b
commit 9cbd0c155d
39 changed files with 1172 additions and 897 deletions
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10
src/include/tcop/utility.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/tcop/utility.h,v 1.30 2007/01/05 22:19:58 momjian Exp $
* $PostgreSQL: pgsql/src/include/tcop/utility.h,v 1.31 2007/02/20 17:32:17 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -26,15 +26,9 @@ extern TupleDesc UtilityTupleDescriptor(Node *parsetree);
extern const char *CreateCommandTag(Node *parsetree);
extern const char *CreateQueryTag(Query *parsetree);
extern LogStmtLevel GetCommandLogLevel(Node *parsetree);
extern LogStmtLevel GetQueryLogLevel(Query *parsetree);
extern bool QueryReturnsTuples(Query *parsetree);
extern bool QueryIsReadOnly(Query *parsetree);
extern bool CommandIsReadOnly(Node *parsetree);
extern void CheckRelationOwnership(RangeVar *rel, bool noCatalogs);