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To: Thomas Lockhart <Thomas.G.Lockhart@jpl.nasa.gov>

Browse Source 
Subject: Re: [PATCHES] SET DateStyle patches

On Tue, 22 Apr 1997, Thomas Lockhart wrote:

> Some more patches! These (try to) finish implementing SET variable TO value
> for "DateStyle" (changed the name from simply "date" to be more descriptive).
> This is based on code from Martin and Bruce (?), which was easy to modify.
> The syntax is
>
> SET DateStyle TO 'iso'
> SET DateStyle TO 'postgres'
> SET DateStyle TO 'sql'
> SET DateStyle TO 'european'
> SET DateStyle TO 'noneuropean'
> SET DateStyle TO 'us'         (same as "noneuropean")
> SET DateStyle TO 'default'    (current same as "postgres,us")
>
> ("european" is just compared for the first 4 characters, and "noneuropean"
> is compared for the first 7 to allow less typing).
>
> Multiple arguments are allowed, so SET datestyle TO 'sql,euro' is valid.
>
> My mods also try to implement "SHOW variable" and "RESET variable", but
> that part just core dumps at the moment. I would guess that my errors
> are obvious to someone who knows what they are doing with the parser stuff,
> so if someone (Bruce and/or Martin??) could have it do the right thing
> we will have a more complete set of what we need.
>
> Also, I would like to have a floating point precision global variable to
> implement "SET precision TO 10" and perhaps "SET precision TO 10,2" for
> float8 and float4, but I don't know how to do that for integer types rather
> than strings. If someone is fixing the SHOW and RESET code, perhaps they can
> add some hooks for me to do the floats while they are at it.
>
> I've left some remnants of variable structures in the source code which
> I did not use in the interests of getting something working for v6.1.
> We'll have time to clean things up for the next release...
This commit is contained in:
Marc G. Fournier
1997-04-23 03:18:27 +00:00
parent cf398593fd
commit 4b5319129c
7 changed files with 392 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/backend/parser/gram.y
View File

@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.30 1997/04/05 06:25:59 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 1.31 1997/04/23 03:17:00 scrappy Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -108,7 +108,7 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
RevokeStmt, RuleStmt, TransactionStmt, ViewStmt, LoadStmt,
CreatedbStmt, DestroydbStmt, VacuumStmt, RetrieveStmt, CursorStmt,
ReplaceStmt, AppendStmt, NotifyStmt, DeleteStmt, ClusterStmt,
ExplainStmt, VariableSetStmt
ExplainStmt, VariableSetStmt, VariableShowStmt, VariableResetStmt
%type <str> relation_name, copy_file_name, copy_delimiter, def_name,
database_name, access_method_clause, access_method, attr_name,
@@ -190,8 +190,8 @@ static Node *makeA_Expr(int oper, char *opname, Node *lexpr, Node *rexpr);
NONE, NOT, NOTHING, NOTIFY, NOTNULL,
OIDS, ON, OPERATOR, OPTION, OR, ORDER,
PNULL, PRIVILEGES, PUBLIC, PURGE, P_TYPE,
RENAME, REPLACE, RETRIEVE, RETURNS, REVOKE, ROLLBACK, RULE,
SELECT, SET, SETOF, STDIN, STDOUT, STORE,
RENAME, REPLACE, RESET, RETRIEVE, RETURNS, REVOKE, ROLLBACK, RULE,
SELECT, SET, SETOF, SHOW, STDIN, STDOUT, STORE,
TABLE, TO, TRANSACTION, UNIQUE, UPDATE, USING, VACUUM, VALUES
VERBOSE, VERSION, VIEW, WHERE, WITH, WORK
%token EXECUTE, RECIPE, EXPLAIN, LIKE, SEQUENCE
@@ -275,6 +275,8 @@ stmt : AddAttrStmt
| DestroydbStmt
| VacuumStmt
| VariableSetStmt
| VariableShowStmt
| VariableResetStmt
;
/*****************************************************************************
@@ -289,7 +291,7 @@ VariableSetStmt: SET var_name TO var_value
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = $2;
n->value = $4;
$$ = (Node *) n;
}
;
@@ -297,6 +299,26 @@ VariableSetStmt: SET var_name TO var_value
var_value: Sconst { $$ = $1; }
;
VariableShowStmt: SHOW var_name
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = $2;
n->value = NULL;
$$ = (Node *) n;
}
;
VariableResetStmt: RESET var_name
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = $2;
n->value = NULL;
$$ = (Node *) n;
}
;
/*****************************************************************************
*
* QUERY :