1997-11-25 23:07:18 +01:00
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/*-------------------------------------------------------------------------
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*
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* parse_target.h
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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
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* handle target lists
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1997-11-25 23:07:18 +01:00
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*
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*
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2004-12-31 23:04:05 +01:00
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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2000-01-26 06:58:53 +01:00
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* Portions Copyright (c) 1994, Regents of the University of California
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1997-11-25 23:07:18 +01:00
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*
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2004-12-31 23:04:05 +01:00
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* $PostgreSQL: pgsql/src/include/parser/parse_target.h,v 1.35 2004/12/31 22:03:38 pgsql Exp $
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1997-11-25 23:07:18 +01:00
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_TARGET_H
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#define PARSE_TARGET_H
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1999-07-16 01:04:24 +02:00
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#include "parser/parse_node.h"
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1997-11-25 23:07:18 +01:00
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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
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1997-11-26 02:14:33 +01:00
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extern List *transformTargetList(ParseState *pstate, List *targetlist);
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2003-05-06 02:20:33 +02:00
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extern void markTargetListOrigins(ParseState *pstate, List *targetlist);
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1999-07-19 02:26:20 +02:00
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extern TargetEntry *transformTargetEntry(ParseState *pstate,
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2000-04-12 19:17:23 +02:00
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Node *node, Node *expr,
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2003-02-13 06:53:46 +01:00
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char *colname, bool resjunk);
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1999-07-19 02:26:20 +02:00
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extern void updateTargetListEntry(ParseState *pstate, TargetEntry *tle,
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2000-04-12 19:17:23 +02:00
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char *colname, int attrno,
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List *indirection);
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1999-11-01 06:06:21 +01:00
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extern List *checkInsertTargets(ParseState *pstate, List *cols,
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2000-04-12 19:17:23 +02:00
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List **attrnos);
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2004-09-30 02:24:27 +02:00
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extern char *FigureColname(Node *node);
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2001-10-28 07:26:15 +01:00
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2001-11-05 18:46:40 +01:00
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#endif /* PARSE_TARGET_H */
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