Enable more flexible syntax for the SET command. Now allows single floats,
single integers, and lists of names, without surrounding them with quotes. Remove all tokens which are defined as operators from ColID and ColLabel to avoid precedence confusion. Thanks to Tom Lane for catching this.
This commit is contained in:
Thomas G. Lockhart
parent
b68d9c4c41
commit
362575b782
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@ -11,7 +11,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.164 2000/03/27 17:12:06 thomas Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.165 2000/03/30 06:02:36 thomas Exp $
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*
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* HISTORY
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* AUTHOR DATE MAJOR EVENT
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@ -297,7 +297,8 @@ static void doNegateFloat(Value *v);
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COALESCE, COLLATE, COLUMN, COMMIT,
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CONSTRAINT, CONSTRAINTS, CREATE, CROSS, CURRENT, CURRENT_DATE,
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CURRENT_TIME, CURRENT_TIMESTAMP, CURRENT_USER, CURSOR,
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DAY_P, DEC, DECIMAL, DECLARE, DEFAULT, DELETE, DESC, DISTINCT, DOUBLE, DROP,
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DAY_P, DEC, DECIMAL, DECLARE, DEFAULT, DELETE, DESC,
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DISTINCT, DOUBLE, DROP,
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ELSE, END_TRANS, EXCEPT, EXECUTE, EXISTS, EXTRACT,
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FALSE_P, FETCH, FLOAT, FOR, FOREIGN, FROM, FULL,
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GLOBAL, GRANT, GROUP, HAVING, HOUR_P,
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@ -712,8 +713,71 @@ opt_level: READ COMMITTED { $$ = "committed"; }
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| SERIALIZABLE { $$ = "serializable"; }
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;
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var_value: Sconst { $$ = $1; }
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| DEFAULT { $$ = NULL; }
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var_value: Sconst
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{
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/* Plain old string (pointer to char) */
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$$ = $1;
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}
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| FCONST
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{
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/* Floating pumeric argument?
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* This recently changed to preserve "stringiness" until here,
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* so we don't have any work to do at all. Nice.
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* - thomas 2000-03-29
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*/
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$$ = $1;
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}
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| Iconst
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{
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char *result;
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char buf[64];
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/* Integer pumeric argument?
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*/
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if (sprintf(buf, "%d", $1) != 1)
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{
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result = pstrdup(buf);
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}
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else
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elog(ERROR, "Unable to convert constant to string (internal error)");
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$$ = result;
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}
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| name_list
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{
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List *n;
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int llen, slen = 0;
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char *result;
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llen = length($1);
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/* List of words? Then concatenate together */
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if (llen < 1)
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elog(ERROR, "SET must have at least one argument");
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foreach (n, $1)
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{
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Value *p = (Value *) lfirst(n);
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Assert(IsA(p, String));
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/* keep track of room for string and trailing comma */
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slen += (strlen(p->val.str) + 1);
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}
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result = palloc(slen + 1);
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*result = '\0';
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foreach (n, $1)
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{
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Value *p = (Value *) lfirst(n);
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strcat(result, p->val.str);
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strcat(result, ",");
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}
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/* remove the trailing comma from the last element */
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*(result+strlen(result)-1) = '\0';
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$$ = result;
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}
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| DEFAULT
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{
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$$ = NULL;
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}
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;
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zone_value: Sconst { $$ = $1; }
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@ -1609,9 +1673,9 @@ TriggerFuncArgs: TriggerFuncArg
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TriggerFuncArg: ICONST
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{
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char *s = (char *) palloc(64);
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sprintf (s, "%d", $1);
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$$ = s;
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char buf[64];
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sprintf (buf, "%d", $1);
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$$ = pstrdup(buf);
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}
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| FCONST { $$ = $1; }
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| Sconst { $$ = $1; }
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@ -3396,7 +3460,7 @@ opt_select_limit: LIMIT select_limit_value ',' select_offset_value
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{ $$ = lappend(lappend(NIL, NULL), NULL); }
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;
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select_limit_value: Iconst
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select_limit_value: Iconst
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{
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Const *n = makeNode(Const);
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@ -5236,6 +5300,15 @@ UserId: IDENT { $$ = $1; };
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* some of these keywords will have to be removed from this
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* list due to shift/reduce conflicts in yacc. If so, move
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* down to the ColLabel entity. - thomas 1997-11-06
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* These show up as operators, ans will screw up the parsing if
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* allowed as identifiers or labels.
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* Thanks to Tom Lane for pointing this out. - thomas 2000-03-29
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| BETWEEN { $$ = "between"; }
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| IN { $$ = "in"; }
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| IS { $$ = "is"; }
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| ISNULL { $$ = "isnull"; }
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| NOTNULL { $$ = "notnull"; }
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| OVERLAPS { $$ = "overlaps"; }
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*/
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ColId: IDENT { $$ = $1; }
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| datetime { $$ = $1; }
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@ -5249,7 +5322,6 @@ ColId: IDENT { $$ = $1; }
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| BACKWARD { $$ = "backward"; }
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| BEFORE { $$ = "before"; }
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| BEGIN_TRANS { $$ = "begin"; }
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| BETWEEN { $$ = "between"; }
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| BY { $$ = "by"; }
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| CACHE { $$ = "cache"; }
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| CASCADE { $$ = "cascade"; }
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@ -5281,7 +5353,6 @@ ColId: IDENT { $$ = $1; }
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| GRANT { $$ = "grant"; }
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| HANDLER { $$ = "handler"; }
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| IMMEDIATE { $$ = "immediate"; }
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| IN { $$ = "in"; }
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| INCREMENT { $$ = "increment"; }
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| INDEX { $$ = "index"; }
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| INHERITS { $$ = "inherits"; }
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@ -5289,8 +5360,6 @@ ColId: IDENT { $$ = $1; }
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| INSERT { $$ = "insert"; }
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| INSTEAD { $$ = "instead"; }
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| INTERVAL { $$ = "interval"; }
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| IS { $$ = "is"; }
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| ISNULL { $$ = "isnull"; }
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| ISOLATION { $$ = "isolation"; }
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| KEY { $$ = "key"; }
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| LANGUAGE { $$ = "language"; }
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@ -5309,13 +5378,11 @@ ColId: IDENT { $$ = $1; }
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| NOCREATEUSER { $$ = "nocreateuser"; }
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| NOTHING { $$ = "nothing"; }
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| NOTIFY { $$ = "notify"; }
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| NOTNULL { $$ = "notnull"; }
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| OF { $$ = "of"; }
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| OIDS { $$ = "oids"; }
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| ONLY { $$ = "only"; }
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| OPERATOR { $$ = "operator"; }
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| OPTION { $$ = "option"; }
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| OVERLAPS { $$ = "overlaps"; }
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| PARTIAL { $$ = "partial"; }
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| PASSWORD { $$ = "password"; }
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| PENDANT { $$ = "pendant"; }
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@ -5375,12 +5442,23 @@ ColId: IDENT { $$ = $1; }
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* Add other keywords to this list. Note that they appear here
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* rather than in ColId if there was a shift/reduce conflict
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* when used as a full identifier. - thomas 1997-11-06
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* These show up as operators, ans will screw up the parsing if
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* allowed as identifiers or labels.
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* Thanks to Tom Lane for pointing this out. - thomas 2000-03-29
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| ALL { $$ = "all"; }
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| ANY { $$ = "any"; }
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| EXCEPT { $$ = "except"; }
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| INTERSECT { $$ = "intersect"; }
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| LIKE { $$ = "like"; }
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| NOT { $$ = "not"; }
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| NULLIF { $$ = "nullif"; }
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| NULL_P { $$ = "null_p"; }
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| OR { $$ = "or"; }
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| UNION { $$ = "union"; }
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*/
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ColLabel: ColId { $$ = $1; }
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| ABORT_TRANS { $$ = "abort"; }
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| ALL { $$ = "all"; }
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| ANALYZE { $$ = "analyze"; }
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| ANY { $$ = "any"; }
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| ASC { $$ = "asc"; }
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| BINARY { $$ = "binary"; }
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| BIT { $$ = "bit"; }
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@ -5411,7 +5489,6 @@ ColLabel: ColId { $$ = $1; }
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| DO { $$ = "do"; }
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| ELSE { $$ = "else"; }
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| END_TRANS { $$ = "end"; }
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| EXCEPT { $$ = "except"; }
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| EXISTS { $$ = "exists"; }
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| EXPLAIN { $$ = "explain"; }
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| EXTEND { $$ = "extend"; }
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@ -5427,12 +5504,10 @@ ColLabel: ColId { $$ = $1; }
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| HAVING { $$ = "having"; }
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| INITIALLY { $$ = "initially"; }
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| INNER_P { $$ = "inner"; }
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| INTERSECT { $$ = "intersect"; }
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| INTO { $$ = "into"; }
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| JOIN { $$ = "join"; }
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| LEADING { $$ = "leading"; }
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| LEFT { $$ = "left"; }
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| LIKE { $$ = "like"; }
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| LISTEN { $$ = "listen"; }
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| LOAD { $$ = "load"; }
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| LOCAL { $$ = "local"; }
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@ -5442,13 +5517,9 @@ ColLabel: ColId { $$ = $1; }
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| NCHAR { $$ = "nchar"; }
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| NEW { $$ = "new"; }
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| NONE { $$ = "none"; }
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| NOT { $$ = "not"; }
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| NULLIF { $$ = "nullif"; }
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| NULL_P { $$ = "null_p"; }
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| NUMERIC { $$ = "numeric"; }
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| OFFSET { $$ = "offset"; }
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| ON { $$ = "on"; }
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| OR { $$ = "or"; }
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| ORDER { $$ = "order"; }
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| OUTER_P { $$ = "outer"; }
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| POSITION { $$ = "position"; }
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@ -5470,7 +5541,6 @@ ColLabel: ColId { $$ = $1; }
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| TRANSACTION { $$ = "transaction"; }
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| TRIM { $$ = "trim"; }
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| TRUE_P { $$ = "true"; }
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| UNION { $$ = "union"; }
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| UNIQUE { $$ = "unique"; }
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| USER { $$ = "user"; }
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| USING { $$ = "using"; }
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