1997-11-25 23:07:18 +01:00
|
|
|
/*-------------------------------------------------------------------------
|
|
|
|
*
|
|
|
|
* parse_node.h
|
2003-04-30 00:13:11 +02:00
|
|
|
* Internal definitions for parser
|
1997-11-25 23:07:18 +01:00
|
|
|
*
|
|
|
|
*
|
2002-06-20 22:29:54 +02:00
|
|
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
2000-01-26 06:58:53 +01:00
|
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
1997-11-25 23:07:18 +01:00
|
|
|
*
|
2003-08-04 02:43:34 +02:00
|
|
|
* $Id: parse_node.h,v 1.36 2003/08/04 00:43:32 momjian Exp $
|
1997-11-25 23:07:18 +01:00
|
|
|
*
|
|
|
|
*-------------------------------------------------------------------------
|
|
|
|
*/
|
|
|
|
#ifndef PARSE_NODE_H
|
|
|
|
#define PARSE_NODE_H
|
|
|
|
|
1999-07-16 01:04:24 +02:00
|
|
|
#include "nodes/parsenodes.h"
|
|
|
|
#include "utils/rel.h"
|
1997-11-25 23:07:18 +01:00
|
|
|
|
2000-09-12 23:07:18 +02:00
|
|
|
/*
|
|
|
|
* State information used during parse analysis
|
2001-02-14 22:35:07 +01:00
|
|
|
*
|
|
|
|
* p_rtable: list of RTEs that will become the rangetable of the query.
|
|
|
|
* Note that neither relname nor refname of these entries are necessarily
|
|
|
|
* unique; searching the rtable by name is a bad idea.
|
|
|
|
*
|
|
|
|
* p_joinlist: list of join items (RangeTblRef and JoinExpr nodes) that
|
|
|
|
* will become the fromlist of the query's top-level FromExpr node.
|
|
|
|
*
|
|
|
|
* p_namespace: list of join items that represents the current namespace
|
|
|
|
* for table and column lookup. This may be just a subset of the rtable +
|
|
|
|
* joinlist, and/or may contain entries that are not yet added to the main
|
|
|
|
* 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.
|
2003-04-30 00:13:11 +02:00
|
|
|
*
|
|
|
|
* 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.
|
2000-02-15 04:38:29 +01:00
|
|
|
*/
|
1997-11-25 23:07:18 +01:00
|
|
|
typedef struct ParseState
|
|
|
|
{
|
2001-03-22 05:01:46 +01:00
|
|
|
struct ParseState *parentParseState; /* stack link */
|
2000-09-12 23:07:18 +02:00
|
|
|
List *p_rtable; /* range table so far */
|
2001-03-22 05:01:46 +01:00
|
|
|
List *p_joinlist; /* join items so far (will become FromExpr
|
|
|
|
* node's fromlist) */
|
2001-02-14 22:35:07 +01:00
|
|
|
List *p_namespace; /* current lookup namespace (join items) */
|
2003-04-30 00:13:11 +02:00
|
|
|
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 */
|
2000-11-08 23:10:03 +01:00
|
|
|
List *p_forUpdate; /* FOR UPDATE clause, if any (see gram.y) */
|
2003-08-04 02:43:34 +02:00
|
|
|
Node *p_value_substitute; /* what to replace VALUE with, if
|
|
|
|
* any */
|
2003-04-30 00:13:11 +02:00
|
|
|
bool p_variableparams;
|
1998-01-15 20:00:16 +01:00
|
|
|
bool p_hasAggs;
|
1998-01-17 05:53:46 +01:00
|
|
|
bool p_hasSubLinks;
|
1998-01-15 20:00:16 +01:00
|
|
|
bool p_is_insert;
|
1997-11-25 23:07:18 +01:00
|
|
|
bool p_is_update;
|
|
|
|
Relation p_target_relation;
|
|
|
|
RangeTblEntry *p_target_rangetblentry;
|
|
|
|
} ParseState;
|
|
|
|
|
1998-01-19 06:06:41 +01:00
|
|
|
extern ParseState *make_parsestate(ParseState *parentParseState);
|
2000-09-12 23:07:18 +02:00
|
|
|
extern Var *make_var(ParseState *pstate, RangeTblEntry *rte, int attrno);
|
1999-07-19 02:26:20 +02:00
|
|
|
extern ArrayRef *transformArraySubscripts(ParseState *pstate,
|
2000-04-12 19:17:23 +02:00
|
|
|
Node *arrayBase,
|
2001-02-14 22:35:07 +01:00
|
|
|
Oid arrayType,
|
Extend pg_cast castimplicit column to a three-way value; this allows us
to be flexible about assignment casts without introducing ambiguity in
operator/function resolution. Introduce a well-defined promotion hierarchy
for numeric datatypes (int2->int4->int8->numeric->float4->float8).
Change make_const to initially label numeric literals as int4, int8, or
numeric (never float8 anymore).
Explicitly mark Func and RelabelType nodes to indicate whether they came
from a function call, explicit cast, or implicit cast; use this to do
reverse-listing more accurately and without so many heuristics.
Explicit casts to char, varchar, bit, varbit will truncate or pad without
raising an error (the pre-7.2 behavior), while assigning to a column without
any explicit cast will still raise an error for wrong-length data like 7.3.
This more nearly follows the SQL spec than 7.2 behavior (we should be
reporting a 'completion condition' in the explicit-cast cases, but we have
no mechanism for that, so just do silent truncation).
Fix some problems with enforcement of typmod for array elements;
it didn't work at all in 'UPDATE ... SET array[n] = foo', for example.
Provide a generalized array_length_coerce() function to replace the
specialized per-array-type functions that used to be needed (and were
missing for NUMERIC as well as all the datetime types).
Add missing conversions int8<->float4, text<->numeric, oid<->int8.
initdb forced.
2002-09-18 23:35:25 +02:00
|
|
|
int32 arrayTypMod,
|
2000-04-12 19:17:23 +02:00
|
|
|
List *indirection,
|
|
|
|
bool forceSlice,
|
|
|
|
Node *assignFrom);
|
1997-11-26 02:14:33 +01:00
|
|
|
extern Const *make_const(Value *value);
|
2001-10-28 07:26:15 +01:00
|
|
|
|
2001-11-05 18:46:40 +01:00
|
|
|
#endif /* PARSE_NODE_H */
|