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b26dfb9522
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.
31 lines
950 B
C
31 lines
950 B
C
/*-------------------------------------------------------------------------
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*
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* parse_target.h
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* handle target lists
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*
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*
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: parse_target.h,v 1.27 2002/09/18 21:35:24 tgl Exp $
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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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#include "parser/parse_node.h"
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extern List *transformTargetList(ParseState *pstate, List *targetlist);
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extern TargetEntry *transformTargetEntry(ParseState *pstate,
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Node *node, Node *expr,
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char *colname, bool resjunk);
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extern void updateTargetListEntry(ParseState *pstate, TargetEntry *tle,
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char *colname, int attrno,
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List *indirection);
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extern List *checkInsertTargets(ParseState *pstate, List *cols,
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List **attrnos);
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#endif /* PARSE_TARGET_H */
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