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CHECK/DEFAULT syntax

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This commit is contained in:
Vadim B. Mikheev
1997-08-20 01:12:38 +00:00
parent bb951c6cb4
commit 4527172b80
3 changed files with 163 additions and 25 deletions
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168
src/backend/parser/gram.y
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@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.36 1997/08/19 04:44:01 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.37 1997/08/20 01:12:02 vadim Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -49,6 +49,11 @@ static bool QueryIsRule = FALSE;
static Node *saved_In_Expr;
extern List *parsetree;
extern int CurScanPosition(void);
extern int DefaultStartPosition;
extern int CheckStartPosition;
extern char *parseString;
/*
* If you need access to certain yacc-generated variables and find that
* they're static by default, uncomment the next line. (this is not a
@@ -113,7 +118,7 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%type <str> relation_name, copy_file_name, copy_delimiter, def_name,
database_name, access_method_clause, access_method, attr_name,
class, index_name, name, file_name, recipe_name,
var_name, aggr_argtype
var_name, aggr_argtype, OptDefault, CheckElem
%type <str> opt_id, opt_portal_name,
before_clause, after_clause, all_Op, MathOp, opt_name, opt_unique,
@@ -124,14 +129,14 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%type <chr> operation
%type <list> stmtblock, stmtmulti,
relation_name_list, OptTableElementList,
tableElementList, OptInherit, definition,
relation_name_list, OptTableElementList, tableElementList,
OptInherit, OptCheck, CheckList, definition,
opt_with, def_args, def_name_list, func_argtypes,
oper_argtypes, OptStmtList, OptStmtBlock, OptStmtMulti,
opt_column_list, columnList, opt_va_list, va_list,
sort_clause, sortby_list, index_params, index_list,
name_list, from_clause, from_list, opt_array_bounds, nest_array_bounds,
expr_list, attrs, res_target_list, res_target_list2,
sort_clause, sortby_list, index_params, index_list, name_list,
from_clause, from_list, opt_array_bounds, nest_array_bounds,
expr_list, default_expr_list, attrs, res_target_list, res_target_list2,
def_list, opt_indirection, group_clause, groupby_list
%type <boolean> opt_inh_star, opt_binary, opt_instead, opt_with_copy,
@@ -154,8 +159,9 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%type <defelt> def_elem
%type <node> def_arg, columnElem, where_clause,
a_expr, a_expr_or_null, AexprConst,
default_expr, default_expr_or_null,
in_expr_nodes, not_in_expr_nodes,
having_clause
having_clause, default_expr
%type <value> NumConst
%type <attr> event_object, attr
%type <sortgroupby> groupby
@@ -182,9 +188,9 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
%token ABORT_TRANS, ACL, ADD, AFTER, AGGREGATE, ALL, ALTER, ANALYZE,
AND, APPEND, ARCHIVE, ARCH_STORE, AS, ASC,
BACKWARD, BEFORE, BEGIN_TRANS, BETWEEN, BINARY, BY,
CAST, CHANGE, CLOSE, CLUSTER, COLUMN, COMMIT, COPY, CREATE,
CURRENT, CURSOR, DATABASE, DECLARE, DELETE, DELIMITERS, DESC,
DISTINCT, DO, DROP, END_TRANS,
CAST, CHANGE, CHECK, CLOSE, CLUSTER, COLUMN, COMMIT, COPY, CREATE,
CURRENT, CURSOR, DATABASE, DECLARE, DEFAULT, DELETE,
DELIMITERS, DESC, DISTINCT, DO, DROP, END_TRANS,
EXTEND, FETCH, FOR, FORWARD, FROM, FUNCTION, GRANT, GROUP,
HAVING, HEAVY, IN, INDEX, INHERITS, INSERT, INSTEAD, INTO, IS,
ISNULL, LANGUAGE, LIGHT, LISTEN, LOAD, MERGE, MOVE, NEW,
@@ -333,21 +339,124 @@ AddAttrStmt: ALTER TABLE relation_name opt_inh_star ADD COLUMN columnDef
}
;
columnDef: Id Typename opt_null
columnDef: Id Typename OptDefault opt_null
{
$$ = makeNode(ColumnDef);
$$->colname = $1;
$$->typename = $2;
$$->is_not_null = $3;
$$->defval = $3;
$$->is_not_null = $4;
}
;
OptDefault: DEFAULT default_expr {
int deflen = CurScanPosition() - DefaultStartPosition;
char *defval;
defval = (char*) palloc (deflen + 1);
memcpy (defval,
parseString + DefaultStartPosition,
deflen);
defval[deflen] = 0;
$$ = defval;
}
| /*EMPTY*/ { $$ = NULL; }
;
default_expr_or_null: default_expr
{ $$ = $1;}
| Pnull
{
A_Const *n = makeNode(A_Const);
n->val.type = T_Null;
$$ = (Node *)n;
}
default_expr: AexprConst
{
if (nodeTag($1) != T_A_Const)
elog (WARN, "Cannot handle parameter in DEFAULT");
$$ = $1;
}
| '-' default_expr %prec UMINUS
{ $$ = makeA_Expr(OP, "-", NULL, $2); }
| default_expr '+' default_expr
{ $$ = makeA_Expr(OP, "+", $1, $3); }
| default_expr '-' default_expr
{ $$ = makeA_Expr(OP, "-", $1, $3); }
| default_expr '/' default_expr
{ $$ = makeA_Expr(OP, "/", $1, $3); }
| default_expr '*' default_expr
{ $$ = makeA_Expr(OP, "*", $1, $3); }
| default_expr '<' default_expr
{ $$ = makeA_Expr(OP, "<", $1, $3); }
| default_expr '>' default_expr
{ $$ = makeA_Expr(OP, ">", $1, $3); }
| default_expr '=' default_expr
{ $$ = makeA_Expr(OP, "=", $1, $3); }
| ':' default_expr
{ $$ = makeA_Expr(OP, ":", NULL, $2); }
| ';' default_expr
{ $$ = makeA_Expr(OP, ";", NULL, $2); }
| '|' default_expr
{ $$ = makeA_Expr(OP, "|", NULL, $2); }
| AexprConst TYPECAST Typename
{
/* AexprConst can be either A_Const or ParamNo */
if (nodeTag($1) == T_A_Const) {
((A_Const *)$1)->typename = $3;
}else {
elog (WARN, "Cannot handle parameter in DEFAULT");
}
$$ = (Node *)$1;
}
| CAST AexprConst AS Typename
{
/* AexprConst can be either A_Const or ParamNo */
if (nodeTag($2) == T_A_Const) {
((A_Const *)$2)->typename = $4;
}else {
elog (WARN, "Cannot handle parameter in DEFAULT");
}
$$ = (Node *)$2;
}
| '(' default_expr ')'
{ $$ = $2; }
| default_expr Op default_expr
{ $$ = makeA_Expr(OP, $2, $1, $3); }
| Op default_expr
{ $$ = makeA_Expr(OP, $1, NULL, $2); }
| default_expr Op
{ $$ = makeA_Expr(OP, $2, $1, NULL); }
| name '(' ')'
{
FuncCall *n = makeNode(FuncCall);
n->funcname = $1;
n->args = NIL;
$$ = (Node *)n;
}
| name '(' default_expr_list ')'
{
FuncCall *n = makeNode(FuncCall);
n->funcname = $1;
n->args = $3;
$$ = (Node *)n;
}
;
default_expr_list: default_expr_or_null
{ $$ = lcons($1, NIL); }
| default_expr_list ',' default_expr_or_null
{ $$ = lappend($1, $3); }
;
opt_null: PNULL { $$ = false; }
| NOT PNULL { $$ = true; }
| NOTNULL { $$ = true; }
| /* EMPTY */ { $$ = false; }
;
/*****************************************************************************
*
* QUERY :
@@ -425,15 +534,17 @@ copy_delimiter: USING DELIMITERS Sconst { $$ = $3;}
*****************************************************************************/
CreateStmt: CREATE TABLE relation_name '(' OptTableElementList ')'
OptInherit OptArchiveType OptLocation OptArchiveLocation
OptInherit OptCheck OptArchiveType OptLocation
OptArchiveLocation
{
CreateStmt *n = makeNode(CreateStmt);
n->relname = $3;
n->tableElts = $5;
n->inhRelnames = $7;
n->archiveType = $8;
n->location = $9;
n->archiveLoc = $10;
n->check = $8;
n->archiveType = $9;
n->location = $10;
n->archiveLoc = $11;
$$ = (Node *)n;
}
;
@@ -475,6 +586,29 @@ OptInherit: INHERITS '(' relation_name_list ')' { $$ = $3; }
| /*EMPTY*/ { $$ = NIL; }
;
OptCheck: CheckList { $$ = $1; }
| { $$ = NULL; }
;
CheckList :
CheckList ',' CheckElem
{ $$ = lappend($1, $3); }
| CheckElem
{ $$ = lcons($1, NIL); }
;
CheckElem: CHECK a_expr {
int chklen = CurScanPosition() - CheckStartPosition;
char *check;
check = (char*) palloc (chklen + 1);
memcpy (check,
parseString + CheckStartPosition,
chklen);
check[chklen] = 0;
$$ = check;
}
;
/*****************************************************************************
*

4
src/backend/parser/keywords.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.10 1997/04/23 06:04:46 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.11 1997/08/20 01:12:04 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -54,6 +54,7 @@ static ScanKeyword ScanKeywords[] = {
{ "by", BY },
{ "cast", CAST },
{ "change", CHANGE },
{ "check", CHECK },
{ "close", CLOSE },
{ "cluster", CLUSTER },
{ "column", COLUMN },
@@ -64,6 +65,7 @@ static ScanKeyword ScanKeywords[] = {
{ "cursor", CURSOR },
{ "database", DATABASE },
{ "declare", DECLARE },
{ "default", DEFAULT },
{ "delete", DELETE },
{ "delimiters", DELIMITERS },
{ "desc", DESC },

4
src/include/nodes/parsenodes.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.17 1997/08/19 04:46:15 vadim Exp $
* $Id: parsenodes.h,v 1.18 1997/08/20 01:12:38 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -136,6 +136,7 @@ typedef struct CreateStmt {
ArchType archiveType; /* archive mode (ARCH_NONE if none */
int location; /* smgrid (-1 if none) */
int archiveLoc; /* smgrid (-1 if none) */
List *check; /* list of CHECK constr */
} CreateStmt;
/* ----------------------
@@ -608,6 +609,7 @@ typedef struct ColumnDef {
char *colname; /* name of column */
TypeName *typename; /* type of column */
bool is_not_null; /* flag to NOT NULL constraint */
char *defval; /* default value of column */
} ColumnDef;
/*