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Infrastructure for deducing Param types from context, in the same way

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that the types of untyped string-literal constants are deduced (ie,
when coerce_type is applied to 'em, that's what the type must be).
Remove the ancient hack of storing the input Param-types array as a
global variable, and put the info into ParseState instead.  This touches
a lot of files because of adjustment of routine parameter lists, but
it's really not a large patch.  Note: PREPARE statement still insists on
exact specification of parameter types, but that could easily be relaxed
now, if we wanted to do so.
This commit is contained in:
Tom Lane
2003-04-29 22:13:11 +00:00
parent 19141f5584
commit aa282d4446
29 changed files with 442 additions and 247 deletions
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17
src/include/parser/parse_node.h
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@ -1,12 +1,13 @@
/*-------------------------------------------------------------------------
*
* parse_node.h
* Internal definitions for parser
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_node.h,v 1.34 2003/04/08 23:20:04 tgl Exp $
* $Id: parse_node.h,v 1.35 2003/04/29 22:13:11 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -32,6 +33,15 @@
* joinlist. Note that an RTE that is present in p_namespace, but does not
* have its inFromCl flag set, is accessible only with an explicit qualifier;
* lookups of unqualified column names should ignore it.
*
* p_paramtypes: an array of p_numparams type OIDs for $n parameter symbols
* (zeroth entry in array corresponds to $1). If p_variableparams is true, the
* set of param types is not predetermined; in that case, a zero array entry
* means that parameter number hasn't been seen, and UNKNOWNOID means the
* parameter has been used but its type is not yet known. NOTE: in a stack
* of ParseStates, only the topmost ParseState contains paramtype info; but
* we copy the p_variableparams flag down to the child nodes for speed in
* coerce_type.
*/
typedef struct ParseState
{
@ -40,9 +50,12 @@ typedef struct ParseState
List *p_joinlist; /* join items so far (will become FromExpr
* node's fromlist) */
List *p_namespace; /* current lookup namespace (join items) */
int p_last_resno; /* last targetlist resno assigned */
Oid *p_paramtypes; /* OIDs of types for $n parameter symbols */
int p_numparams; /* allocated size of p_paramtypes[] */
int p_next_resno; /* next targetlist resno to assign */
List *p_forUpdate; /* FOR UPDATE clause, if any (see gram.y) */
Node *p_value_substitute; /* what to replace VALUE with, if any */
bool p_variableparams;
bool p_hasAggs;
bool p_hasSubLinks;
bool p_is_insert;