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Change case-folding of keywords to conform to SQL99 and fix misbehavior

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in Turkish locale.  Keywords are now checked under pure ASCII case-folding
rules ('A'-'Z'->'a'-'z' and nothing else).  However, once a word is
determined not to be a keyword, it will be case-folded under the current
locale, same as before.  See pghackers discussion 20-Feb-01.
This commit is contained in:
Tom Lane
2001-02-21 18:53:47 +00:00
parent 496373e2e4
commit be92ad49e0
6 changed files with 231 additions and 108 deletions
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36
src/backend/parser/scan.l
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@@ -2,14 +2,14 @@
/*-------------------------------------------------------------------------
*
* scan.l
* lexical scanner for POSTGRES
* lexical scanner for PostgreSQL
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.86 2001/02/03 20:13:05 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.87 2001/02/21 18:53:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -477,12 +477,27 @@ other .
{identifier} {
int i;
ScanKeyword *keyword;
ScanKeyword *keyword;
int i;
for(i = 0; yytext[i]; i++)
/* Is it a keyword? */
keyword = ScanKeywordLookup((char*) yytext);
if (keyword != NULL)
return keyword->value;
/*
* No. Convert the identifier to lower case, and truncate
* if necessary.
*
* Note: here we use a locale-dependent case conversion,
* which seems appropriate under SQL99 rules, whereas
* the keyword comparison was NOT locale-dependent.
*/
for (i = 0; yytext[i]; i++)
{
if (isupper((unsigned char) yytext[i]))
yytext[i] = tolower((unsigned char) yytext[i]);
}
if (i >= NAMEDATALEN)
{
#ifdef MULTIBYTE
@@ -497,15 +512,8 @@ other .
yytext[NAMEDATALEN-1] = '\0';
#endif
}
keyword = ScanKeywordLookup((char*)yytext);
if (keyword != NULL) {
return keyword->value;
}
else
{
yylval.str = pstrdup((char*)yytext);
return IDENT;
}
yylval.str = pstrdup((char*) yytext);
return IDENT;
}
{other} { return yytext[0]; }