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Add LOCALTIME and LOCALTIMESTAMP functions per SQL99 standard.
Remove ODBC-compatible empty parentheses from calls to SQL99 functions for which these parentheses do not match the standard. Update the ODBC driver to ensure compatibility with the ODBC standard for these functions (e.g. CURRENT_TIMESTAMP, CURRENT_USER, etc). Include a new appendix in the User's Guide which lists the labeled features for SQL99 (the labeled features replaced the "basic", "intermediate", and "advanced" categories from SQL92). features.sgml does not yet split this list into "supported" and "unsupported" lists.
This commit is contained in:
Thomas G. Lockhart
@ -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 2.322 2002/06/13 14:16:43 thomas Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.323 2002/06/15 03:00:03 thomas Exp $
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*
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* HISTORY
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* AUTHOR DATE MAJOR EVENT
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@ -259,7 +259,6 @@ static void doNegateFloat(Value *v);
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%type <list> row_descriptor, row_list, in_expr_nodes
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%type <node> row_expr
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%type <node> case_expr, case_arg, when_clause, case_default
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%type <boolean> opt_empty_parentheses
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%type <list> when_clause_list
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%type <ival> sub_type
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%type <list> OptCreateAs, CreateAsList
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@ -347,7 +346,7 @@ static void doNegateFloat(Value *v);
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KEY,
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LANCOMPILER, LANGUAGE, LEADING, LEFT, LEVEL, LIKE, LIMIT, LISTEN,
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LOAD, LOCAL, LOCATION, LOCK_P,
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LOAD, LOCAL, LOCALTIME, LOCALTIMESTAMP, LOCATION, LOCK_P,
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MATCH, MAXVALUE, MINUTE_P, MINVALUE, MODE, MONTH_P, MOVE,
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@ -5461,7 +5460,7 @@ c_expr: columnref
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n->agg_distinct = FALSE;
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$$ = (Node *)n;
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}
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| CURRENT_DATE opt_empty_parentheses
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| CURRENT_DATE
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{
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/*
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* Translate as "'now'::text::date".
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@ -5487,7 +5486,7 @@ c_expr: columnref
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| CURRENT_TIME opt_empty_parentheses
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| CURRENT_TIME
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{
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/*
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* Translate as "'now'::text::timetz".
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@ -5530,7 +5529,7 @@ c_expr: columnref
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| CURRENT_TIMESTAMP opt_empty_parentheses
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| CURRENT_TIMESTAMP
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{
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/*
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* Translate as "'now'::text::timestamptz".
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@ -5574,7 +5573,94 @@ c_expr: columnref
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| CURRENT_USER opt_empty_parentheses
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| LOCALTIME
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{
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/*
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* Translate as "'now'::text::time".
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* See comments for CURRENT_DATE.
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*/
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A_Const *s = makeNode(A_Const);
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TypeName *d;
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s->val.type = T_String;
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s->val.val.str = "now";
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s->typename = SystemTypeName("text");
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d = SystemTypeName("time");
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/* SQL99 mandates a default precision of zero for TIME
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* fields in schemas. However, for LOCALTIME
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* let's preserve the microsecond precision we
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* might see from the system clock. - thomas 2001-12-07
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*/
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d->typmod = 6;
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| LOCALTIME '(' Iconst ')'
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{
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/*
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* Translate as "'now'::text::time(n)".
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* See comments for CURRENT_DATE.
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*/
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A_Const *s = makeNode(A_Const);
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TypeName *d;
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s->val.type = T_String;
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s->val.val.str = "now";
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s->typename = SystemTypeName("text");
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d = SystemTypeName("time");
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if (($3 < 0) || ($3 > MAX_TIME_PRECISION))
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elog(ERROR, "LOCALTIME(%d) precision must be between %d and %d",
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$3, 0, MAX_TIME_PRECISION);
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d->typmod = $3;
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| LOCALTIMESTAMP
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{
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/*
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* Translate as "'now'::text::timestamp".
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* See comments for CURRENT_DATE.
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*/
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A_Const *s = makeNode(A_Const);
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TypeName *d;
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s->val.type = T_String;
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s->val.val.str = "now";
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s->typename = SystemTypeName("text");
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d = SystemTypeName("timestamp");
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/* SQL99 mandates a default precision of 6 for timestamp.
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* Also, that is about as precise as we will get since
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* we are using a microsecond time interface.
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* - thomas 2001-12-07
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*/
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d->typmod = 6;
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| LOCALTIMESTAMP '(' Iconst ')'
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{
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/*
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* Translate as "'now'::text::timestamp(n)".
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* See comments for CURRENT_DATE.
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*/
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A_Const *s = makeNode(A_Const);
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TypeName *d;
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s->val.type = T_String;
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s->val.val.str = "now";
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s->typename = SystemTypeName("text");
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d = SystemTypeName("timestamp");
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if (($3 < 0) || ($3 > MAX_TIMESTAMP_PRECISION))
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elog(ERROR, "LOCALTIMESTAMP(%d) precision must be between %d and %d",
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$3, 0, MAX_TIMESTAMP_PRECISION);
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d->typmod = $3;
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$$ = (Node *)makeTypeCast((Node *)s, d);
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}
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| CURRENT_USER
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{
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FuncCall *n = makeNode(FuncCall);
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n->funcname = SystemFuncName("current_user");
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@ -5583,7 +5669,7 @@ c_expr: columnref
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n->agg_distinct = FALSE;
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$$ = (Node *)n;
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}
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| SESSION_USER opt_empty_parentheses
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| SESSION_USER
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{
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FuncCall *n = makeNode(FuncCall);
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n->funcname = SystemFuncName("session_user");
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@ -5592,7 +5678,7 @@ c_expr: columnref
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n->agg_distinct = FALSE;
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$$ = (Node *)n;
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}
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| USER opt_empty_parentheses
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| USER
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{
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FuncCall *n = makeNode(FuncCall);
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n->funcname = SystemFuncName("current_user");
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@ -5966,9 +6052,6 @@ attrs: '.' attr_name
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{ $$ = lcons(makeString($2), $3); }
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;
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opt_empty_parentheses: '(' ')' { $$ = TRUE; }
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| /*EMPTY*/ { $$ = TRUE; }
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;
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/*****************************************************************************
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*
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@ -6572,6 +6655,8 @@ reserved_keyword:
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| INTO
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| LEADING
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| LIMIT
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| LOCALTIME
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| LOCALTIMESTAMP
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| NEW
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| NOT
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| NULL_P
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.113 2002/06/11 15:41:37 thomas Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.114 2002/06/15 03:00:03 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -172,6 +172,8 @@ static const ScanKeyword ScanKeywords[] = {
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{"listen", LISTEN},
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{"load", LOAD},
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{"local", LOCAL},
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{"localtime", LOCALTIME},
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{"localtimestamp", LOCALTIMESTAMP},
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{"location", LOCATION},
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{"lock", LOCK_P},
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{"match", MATCH},
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@ -103,6 +103,8 @@ char *mapFuncs[][2] = {
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{"CURRENT_DATE", "current_date" },
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{"CURRENT_TIME", "current_time" },
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{"CURRENT_TIMESTAMP", "current_timestamp" },
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{"LOCALTIME", "localtime" },
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{"LOCALTIMESTAMP", "localtimestamp" },
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{"CURRENT_USER", "cast(current_user as text)" },
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{"SESSION_USER", "cast(session_user as text)" },
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{"CURDATE", "current_date" },
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