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Postgres FD Implementation
Commit 8e079051 authored by Michael Meskes's avatar Michael Meskes
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src/interfaces/ecpg/ChangeLog
View file @ 8e079051
......@@ -861,5 +861,11 @@ Tue Mar 7 10:58:21 CET 2000
Thu Mar 9 10:12:57 CET 2000
- Fixed another memory bug in the parser.
Wed Mar 15 17:36:02 CET 2000
- Synced preproc.y with gram.y.
- Synced pgc.l with scan.l.
- Synced keyword.c.
- Set library version to 3.1.0.
- Set ecpg version to 2.7.0.
src/interfaces/ecpg/preproc/keywords.c
View file @ 8e079051
......@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/keywords.c,v 1.23 2000/02/22 19:57:10 meskes Exp $
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/keywords.c,v 1.24 2000/03/15 19:09:10 meskes Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -182,6 +182,7 @@ static ScanKeyword ScanKeywords[] = {
{"only", ONLY},
{"operator", OPERATOR},
{"option", OPTION},
{"overlaps", OVERLAPS},
{"or", OR},
{"order", ORDER},
{"outer", OUTER_P},
......
src/interfaces/ecpg/preproc/pgc.l
View file @ 8e079051
......@@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.53 2000/03/08 22:03:12 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.54 2000/03/15 19:09:10 meskes Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -147,21 +147,22 @@ xdcother [^"]
xdcinside ({xdcqq}|{xdcqdq}|{xdcother})
/* C-Style Comments
* Ignored by the scanner and parser.
* The "extended comment" syntax closely resembles allowable operator syntax.
* The tricky part here is to get lex to recognize a string starting with
* slash-star as a comment, when interpreting it as an operator would produce
* a longer match --- remember lex will prefer a longer match! So, we have
* to provide a special rule for xcline (a complete comment that could
* otherwise look like an operator), as well as append {op_and_self}* to
* xcstart so that it matches at least as much as {operator} would.
* Then the tie-breaker (first matching rule of same length) wins.
* There is still a problem if someone writes, eg, slash-star-star-slash-plus.
* It'll be taken as an xcstart, rather than xcline and an operator as one
* could wish. I don't see any way around that given lex's behavior;
* that someone will just have to write a space after the comment.
* a longer match --- remember lex will prefer a longer match! Also, if we
* have tor whereas we want to see it as a + operator and a comment start.
* The solution is two-fold:
* 1. append {op_and_self}* to xcstart so that it matches as much text as
* {operator} would. Then the tie-breaker (first matching rule of same
* length) ensures xcstart wins. We put back the extra stuff with yyless()
* in case it contains a star-slash that should terminate the comment.
* 2. In the operator rule, check for slash-star within the operator, and
* if found throw it back with yyless(). This handles the plus-slash-star
* problem.
* SQL92-style comments, which start with dash-dash, have similar interactions
* with the operator rule.
*/
xcline \/\*{op_and_self}*\*\/
xcstart \/\*{op_and_self}*
xcstop \*+\/
xcinside ([^*]+)|(\*+[^/])
......@@ -174,6 +175,7 @@ identifier {letter}{letter_or_digit}*
typecast "::"
/* NB: if you change "self", fix the copy in the operator rule too! */
self [,()\[\].;$\:\+\-\*\/\%\^\<\>\=\|]
op_and_self [\~\!\@\#\^\&\|\`\?\$\:\+\-\*\/\%\<\>\=]
operator {op_and_self}+
......@@ -252,31 +254,32 @@ cppline {space}*#(.*\\{line_end})*.*
*
* Quoted strings must allow some special characters such as single-quote
* and newline.
* Embedded single-quotes are implemented both in the SQL/92-standard
* Embedded single-quotes are implemented both in the SQL92-standard
* style of two adjacent single quotes "''" and in the Postgres/Java style
* of escaped-quote "\'".
* Other embedded escaped characters are matched explicitly and the leading
* backslash is dropped from the string. - thomas 1997-09-24
* Note that xcline must appear before xcstart, which must appear before
* operator, as explained above! Also whitespace (comment) must appear
* before operator.
* Note that xcstart must appear before operator, as explained above!
* Also whitespace (comment) must appear before operator.
*/
%%
<SQL>{whitespace} { /* ignore */ }
{xcline} { ECHO; }
{xcstart} {
state_before = YYSTATE;
ECHO;
BEGIN(xc);
/* Put back any characters past slash-star; see above */
yyless(2);
}
<xc>{xcstop} { ECHO; BEGIN(state_before); }
<xc>{xcinside} { ECHO; }
<xc><<EOF>> { mmerror(ET_ERROR, "Unterminated /* comment"); }
<SQL>{xbstart} {
BEGIN(xb);
startlit();
......@@ -291,6 +294,8 @@ cppline {space}*#(.*\\{line_end})*.*
mmerror(ET_ERROR, "Bad binary integer input!");
return ICONST;
}
<xb><<EOF>> { mmerror(ET_ERROR, "Unterminated binary integer"); }
<xh>{xhinside} |
<xb>{xbinside} {
addlit(yytext, yyleng);
......@@ -314,6 +319,8 @@ cppline {space}*#(.*\\{line_end})*.*
return ICONST;
}
<xb><<EOF>> { mmerror(ET_ERROR, "Unterminated hexadecimal integer"); }
{xqstart} {
state_before = YYSTATE;
BEGIN(xq);
......@@ -333,6 +340,8 @@ cppline {space}*#(.*\\{line_end})*.*
/* ignore */
}
<xq><<EOF>> { mmerror(ET_ERROR, "Unterminated quoted string"); }
{xdstart} {
state_before = YYSTATE;
BEGIN(xd);
......@@ -346,6 +355,7 @@ cppline {space}*#(.*\\{line_end})*.*
<xd>{xdinside} {
addlit(yytext, yyleng);
}
<xq><<EOF>> { mmerror(ET_ERROR, "Unterminated quoted identifier"); }
<SQL>{typecast} { return TYPECAST; }
<SQL>{self} { /*
* We may find a ';' inside a structure
......@@ -357,7 +367,33 @@ cppline {space}*#(.*\\{line_end})*.*
return yytext[0];
}
<SQL>{operator} {
if (strcmp((char*)yytext,"!=") == 0)
/* Check for embedded slash-star or dash-dash */
char *slashstar = strstr((char*)yytext, "/*");
char *dashdash = strstr((char*)yytext, "--");
if (slashstar && dashdash)
{
if (slashstar > dashdash)
slashstar = dashdash;
}
else if (!slashstar)
slashstar = dashdash;
if (slashstar)
{
int nchars = slashstar - ((char*)yytext);
yyless(nchars);
/* If what we have left is only one char, and it's
* one of the characters matching "self", then
* return it as a character token the same way
* that the "self" rule would have.
*/
if (nchars == 1 &&
strchr(",()[].;$:+-*/%^<>=|", yytext[0]))
return yytext[0];
}
if (strcmp((char*)yytext, "!=") == 0)
yylval.str = mm_strdup("<>"); /* compatability */
else
yylval.str = mm_strdup((char*)yytext);
......
src/interfaces/ecpg/preproc/preproc.y
View file @ 8e079051
......@@ -196,7 +196,7 @@ make_name(void)
ISOLATION, JOIN, KEY, LANGUAGE, LEADING, LEFT, LEVEL, LIKE, LOCAL,
MATCH, MINUTE_P, MONTH_P, NAMES,
NATIONAL, NATURAL, NCHAR, NEXT, NO, NOT, NULLIF, NULL_P, NUMERIC,
OF, ON, ONLY, OPTION, OR, ORDER, OUTER_P,
OF, ON, ONLY, OPTION, OR, ORDER, OUTER_P, OVERLAPS,
PARTIAL, POSITION, PRECISION, PRIMARY, PRIOR, PRIVILEGES, PROCEDURE, PUBLIC,
READ, REFERENCES, RELATIVE, REVOKE, RIGHT, ROLLBACK,
SCROLL, SECOND_P, SELECT, SESSION_USER, SET, SUBSTRING,
......@@ -253,6 +253,7 @@ make_name(void)
%right '='
%nonassoc '<' '>'
%nonassoc LIKE
%nonassoc OVERLAPS
%nonassoc BETWEEN
%nonassoc IN
%left Op /* multi-character ops and user-defined operators */
......@@ -291,7 +292,7 @@ make_name(void)
%type <str> Typename SimpleTypename Generic Numeric generic opt_float opt_numeric
%type <str> opt_decimal Character character opt_varying opt_charset
%type <str> opt_collate Datetime datetime opt_timezone opt_interval
%type <str> numeric a_expr_or_null row_expr row_descriptor row_list
%type <str> numeric row_expr row_descriptor row_list
%type <str> SelectStmt SubSelect result OptTemp ConstraintAttributeSpec
%type <str> opt_table opt_all sort_clause sortby_list ConstraintAttr
%type <str> sortby OptUseOp opt_inh_star relation_name_list name_list
......@@ -898,7 +899,6 @@ DEFAULT} */
alter_column_action:
SET DEFAULT a_expr { $$ = cat2_str(make_str("set default"), $3); }
| SET DEFAULT NULL_P { $$ = make_str("set default null"); }
| DROP DEFAULT { $$ = make_str("drop default"); }
;
......@@ -1090,10 +1090,6 @@ ColConstraintElem: NOT NULL_P
{
$$ = cat_str(3, make_str("check ("), $3, make_str(")"));
}
| DEFAULT NULL_P
{
$$ = make_str("default null");
}
| DEFAULT b_expr
{
$$ = cat2_str(make_str("default"), $2);
......@@ -2119,9 +2115,9 @@ opt_trans: WORK { $$ = ""; }
*
*****************************************************************************/
ViewStmt: CREATE VIEW name AS SelectStmt
ViewStmt: CREATE VIEW name opt_column_list AS SelectStmt
{
$$ = cat_str(4, make_str("create view"), $3, make_str("as"), $5);
$$ = cat_str(5, make_str("create view"), $3, $4, make_str("as"), $6);
}
;
......@@ -3096,6 +3092,7 @@ character: CHARACTER opt_varying opt_charset
| CHAR opt_varying { $$ = cat2_str(make_str("char"), $2); }
| VARCHAR { $$ = make_str("varchar"); }
| NATIONAL CHARACTER opt_varying { $$ = cat2_str(make_str("national character"), $3); }
| NATIONAL CHAR opt_varying { $$ = cat2_str(make_str("national char"), $3); }
| NCHAR opt_varying { $$ = cat2_str(make_str("nchar"), $2); }
;
......@@ -3119,9 +3116,9 @@ Datetime: datetime
{
$$ = cat2_str(make_str("timestamp"), $2);
}
| TIME
| TIME opt_timezone
{
$$ = make_str("time");
$$ = cat2_str(make_str("time"), $2);
}
| INTERVAL opt_interval
{
......@@ -3159,14 +3156,6 @@ opt_interval: datetime { $$ = $1; }
*
*****************************************************************************/
a_expr_or_null: a_expr
{ $$ = $1; }
| NULL_P
{
$$ = make_str("null");
}
;
/* Expressions using row descriptors
* Define row_descriptor to allow yacc to break the reduce/reduce conflict
* with singleton expressions.
......@@ -3191,6 +3180,10 @@ row_expr: '(' row_descriptor ')' IN '(' SubSelect ')'
{
$$ = cat_str(7, make_str("("), $2, make_str(")"), $4, make_str("("), $6, make_str(")"));
}
| '(' row_descriptor ')' OVERLAPS '(' row_descriptor ')'
{
$$ = cat_str(5, make_str("("), $2, make_str(") overlaps ("), $6, make_str(")"));
}
;
row_descriptor: row_list ',' a_expr
......@@ -3248,14 +3241,6 @@ a_expr: c_expr
{ $$ = $1; }
| a_expr TYPECAST Typename
{ $$ = cat_str(3, $1, make_str("::"), $3); }
/*
* Can't collapse this into prior rule by using a_expr_or_null;
* that creates reduce/reduce conflicts. Grumble.
*/
| NULL_P TYPECAST Typename
{
$$ = cat2_str(make_str("null::"), $3);
}
/*
* These operators must be called out explicitly in order to make use
* of yacc/bison's automatic operator-precedence handling. All other
......@@ -3302,11 +3287,6 @@ a_expr: c_expr
{ $$ = cat_str(3, $1, make_str("<"), $3); }
| a_expr '>' a_expr
{ $$ = cat_str(3, $1, make_str(">"), $3); }
| a_expr '=' NULL_P
{ $$ = cat2_str($1, make_str("= NULL")); }
/* We allow this for standards-broken SQL products, like MS stuff */
| NULL_P '=' a_expr
{ $$ = cat2_str(make_str("= NULL"), $3); }
| a_expr '=' a_expr
{ $$ = cat_str(3, $1, make_str("="), $3); }
| a_expr Op a_expr
......@@ -3376,7 +3356,7 @@ a_expr: c_expr
*
* b_expr is a subset of the complete expression syntax
*
* Presently, AND, NOT, IS, IN, and NULL are the a_expr keywords that would
* Presently, AND, NOT, IS and IN are the a_expr keywords that would
* cause trouble in the places where b_expr is used. For simplicity, we
* just eliminate all the boolean-keyword-operator productions from b_expr.
*/
......@@ -3388,10 +3368,6 @@ b_expr: c_expr
{
$$ = cat_str(3, $1, make_str("::"), $3);
}
| NULL_P TYPECAST Typename
{
$$ = cat2_str(make_str("null::"), $3);
}
| '-' b_expr %prec UMINUS
{ $$ = cat2_str(make_str("-"), $2); }
| '%' b_expr
......@@ -3455,9 +3431,9 @@ c_expr: attr
{ $$ = cat2_str($1, $2); }
| AexprConst
{ $$ = $1; }
| '(' a_expr_or_null ')'
| '(' a_expr ')'
{ $$ = cat_str(3, make_str("("), $2, make_str(")")); }
| CAST '(' a_expr_or_null AS Typename ')'
| CAST '(' a_expr AS Typename ')'
{ $$ = cat_str(5, make_str("cast("), $3, make_str("as"), $5, make_str(")")); }
| case_expr
{ $$ = $1; }
......@@ -3539,9 +3515,9 @@ opt_indirection: '[' a_expr ']' opt_indirection
{ $$ = EMPTY; }
;
expr_list: a_expr_or_null
expr_list: a_expr
{ $$ = $1; }
| expr_list ',' a_expr_or_null
| expr_list ',' a_expr
{ $$ = cat_str(3, $1, make_str(","), $3); }
| expr_list USING a_expr
{ $$ = cat_str(3, $1, make_str("using"), $3); }
......@@ -3648,13 +3624,13 @@ when_clause_list: when_clause_list when_clause
{ $$ = $1; }
;
when_clause: WHEN a_expr THEN a_expr_or_null
when_clause: WHEN a_expr THEN a_expr
{
$$ = cat_str(4, make_str("when"), $2, make_str("then"), $4);
}
;
case_default: ELSE a_expr_or_null { $$ = cat2_str(make_str("else"), $2); }
case_default: ELSE a_expr { $$ = cat2_str(make_str("else"), $2); }
| /*EMPTY*/ { $$ = EMPTY; }
;
......@@ -3698,11 +3674,11 @@ target_list: target_list ',' target_el
;
/* AS is not optional because shift/red conflict with unary ops */
target_el: a_expr_or_null AS ColLabel
target_el: a_expr AS ColLabel
{
$$ = cat_str(3, $1, make_str("as"), $3);
}
| a_expr_or_null
| a_expr
{
$$ = $1;
}
......@@ -3724,7 +3700,7 @@ update_target_list: update_target_list ',' update_target_el
| '*' { $$ = make_str("*"); }
;
update_target_el: ColId opt_indirection '=' a_expr_or_null
update_target_el: ColId opt_indirection '=' a_expr
{
$$ = cat_str(4, $1, $2, make_str("="), $4);
}
......@@ -3801,6 +3777,10 @@ AexprConst: Iconst
{
$$ = make_str("false");
}
| NULL_P
{
$$ = make_str("null");
}
;
ParamNo: PARAM opt_indirection
......@@ -4935,6 +4915,7 @@ ECPGColId: /* to be used instead of ColId */
| ONLY { $$ = make_str("only"); }
| OPERATOR { $$ = make_str("operator"); }
| OPTION { $$ = make_str("option"); }
| OVERLAPS { $$ = make_str("overlaps"); }
| PASSWORD { $$ = make_str("password"); }
| PENDANT { $$ = make_str("pendant"); }
| PRIOR { $$ = make_str("prior"); }
......
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