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Commit0213835

Browse files
committed
Remove "convert 'blah' using conversion_name" facility, because if it
produces text it is an encoding hole and if not it's incompatiblewith the spec, whatever the spec means (which we're not sure about anyway).
1 parentc3b193a commit0213835

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9 files changed

+15
-1046
lines changed

9 files changed

+15
-1046
lines changed

‎doc/src/sgml/func.sgml

Lines changed: 7 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.397 2007/09/19 03:13:57 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.398 2007/09/24 01:29:27 adunstan Exp $ -->
22

33
<chapter id="functions">
44
<title>Functions and Operators</title>
@@ -1022,9 +1022,6 @@
10221022
<indexterm>
10231023
<primary>char_length</primary>
10241024
</indexterm>
1025-
<indexterm>
1026-
<primary>convert</primary>
1027-
</indexterm>
10281025
<indexterm>
10291026
<primary>lower</primary>
10301027
</indexterm>
@@ -1119,22 +1116,6 @@
11191116
<entry><literal>4</literal></entry>
11201117
</row>
11211118

1122-
<row>
1123-
<entry><literal><function>convert</function>(<parameter>string</parameter>
1124-
using <parameter>conversion_name</parameter>)</literal></entry>
1125-
<entry><type>bytea</type></entry>
1126-
<entry>
1127-
Change encoding using specified conversion name. Conversions
1128-
can be defined by <command>CREATE CONVERSION</command>. Also
1129-
there are some pre-defined conversion names. See <xref
1130-
linkend="conversion-names"> for available conversion
1131-
names. The <parameter>string</parameter> must be valid in the
1132-
source encoding.
1133-
</entry>
1134-
<entry><literal>convert('PostgreSQL' using iso_8859_1_to_utf8)</literal></entry>
1135-
<entry><literal>'PostgreSQL'</literal> in UTF8 (Unicode, 8-bit) encoding</entry>
1136-
</row>
1137-
11381119
<row>
11391120
<entry><literal><function>lower</function>(<parameter>string</parameter>)</literal></entry>
11401121
<entry><type>text</type></entry>
@@ -1245,6 +1226,9 @@
12451226
<indexterm>
12461227
<primary>chr</primary>
12471228
</indexterm>
1229+
<indexterm>
1230+
<primary>convert</primary>
1231+
</indexterm>
12481232
<indexterm>
12491233
<primary>convert_from</primary>
12501234
</indexterm>
@@ -1374,6 +1358,9 @@
13741358
original encoding is specified by
13751359
<parameter>src_encoding</parameter>. The
13761360
<parameter>string</parameter> must be valid in this encoding.
1361+
Conversions can be defined by <command>CREATE CONVERSION</command>.
1362+
Also there are some pre-defined conversions. See <xref
1363+
linkend="conversion-names"> for available conversions.
13771364
</entry>
13781365
<entry><literal>convert( 'text_in_utf8', 'UTF8', 'LATIN1')</literal></entry>
13791366
<entry><literal>text_in_utf8</literal> represented in ISO 8859-1 encoding</entry>

‎doc/src/sgml/ref/create_conversion.sgml

Lines changed: 2 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/create_conversion.sgml,v 1.19 2007/01/31 23:26:03 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/create_conversion.sgml,v 1.20 2007/09/24 01:29:28 adunstan Exp $ -->
22

33
<refentry id="SQL-CREATECONVERSION">
44
<refmeta>
@@ -27,9 +27,7 @@ CREATE [ DEFAULT ] CONVERSION <replaceable>name</replaceable>
2727

2828
<para>
2929
<command>CREATE CONVERSION</command> defines a new conversion between
30-
character set encodings. Conversion names can be used in the
31-
<function>convert</function> function
32-
to specify a particular encoding conversion. Also, conversions that
30+
character set encodings. Also, conversions that
3331
are marked <literal>DEFAULT</> can be used for automatic encoding
3432
conversion between
3533
client and server. For this purpose, two conversions, from encoding A to

‎src/backend/catalog/pg_conversion.c

Lines changed: 1 addition & 74 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/catalog/pg_conversion.c,v 1.37 2007/09/18 17:41:17 adunstan Exp $
11+
* $PostgreSQL: pgsql/src/backend/catalog/pg_conversion.c,v 1.38 2007/09/24 01:29:28 adunstan Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -276,76 +276,3 @@ FindConversion(const char *conname, Oid connamespace)
276276
returnconoid;
277277
}
278278

279-
/*
280-
* Execute SQL99's CONVERT function.
281-
*
282-
* CONVERT <left paren> <character value expression>
283-
* USING <form-of-use conversion name> <right paren>
284-
*
285-
* BYTEA convert_using(TEXT string, TEXT conversion_name)
286-
*
287-
* bytea is returned so we don't give a value that is
288-
* not valid in the database encoding.
289-
*/
290-
Datum
291-
pg_convert_using(PG_FUNCTION_ARGS)
292-
{
293-
text*string=PG_GETARG_TEXT_P(0);
294-
text*conv_name=PG_GETARG_TEXT_P(1);
295-
text*retval;
296-
List*parsed_name;
297-
Oidconvoid;
298-
HeapTupletuple;
299-
Form_pg_conversionbody;
300-
char*str;
301-
char*result;
302-
intlen;
303-
304-
/* Convert input string to null-terminated form */
305-
len=VARSIZE(string)-VARHDRSZ;
306-
str=palloc(len+1);
307-
memcpy(str,VARDATA(string),len);
308-
*(str+len)='\0';
309-
310-
/* Look up the conversion name */
311-
parsed_name=textToQualifiedNameList(conv_name);
312-
convoid=FindConversionByName(parsed_name);
313-
if (!OidIsValid(convoid))
314-
ereport(ERROR,
315-
(errcode(ERRCODE_UNDEFINED_OBJECT),
316-
errmsg("conversion \"%s\" does not exist",
317-
NameListToString(parsed_name))));
318-
319-
tuple=SearchSysCache(CONVOID,
320-
ObjectIdGetDatum(convoid),
321-
0,0,0);
322-
if (!HeapTupleIsValid(tuple))
323-
elog(ERROR,"cache lookup failed for conversion %u",convoid);
324-
body= (Form_pg_conversion)GETSTRUCT(tuple);
325-
326-
/* Temporary result area should be more than big enough */
327-
result=palloc(len*4+1);
328-
329-
OidFunctionCall5(body->conproc,
330-
Int32GetDatum(body->conforencoding),
331-
Int32GetDatum(body->contoencoding),
332-
CStringGetDatum(str),
333-
CStringGetDatum(result),
334-
Int32GetDatum(len));
335-
336-
ReleaseSysCache(tuple);
337-
338-
/*
339-
* build text result structure. we cannot use textin() here, since textin
340-
* assumes that input string encoding is same as database encoding.
341-
*/
342-
len=strlen(result)+VARHDRSZ;
343-
retval=palloc(len);
344-
SET_VARSIZE(retval,len);
345-
memcpy(VARDATA(retval),result,len-VARHDRSZ);
346-
347-
pfree(result);
348-
pfree(str);
349-
350-
PG_RETURN_BYTEA_P(retval);
351-
}

‎src/backend/parser/gram.y

Lines changed: 2 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -11,7 +11,7 @@
1111
*
1212
*
1313
* IDENTIFICATION
14-
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.602 2007/09/03 18:46:30 tgl Exp $
14+
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.603 2007/09/24 01:29:28 adunstan Exp $
1515
*
1616
* HISTORY
1717
* AUTHORDATEMAJOR EVENT
@@ -377,7 +377,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
377377
CHARACTER CHARACTERISTICS CHECK CHECKPOINT CLASS CLOSE
378378
CLUSTER COALESCE COLLATE COLUMN COMMENT COMMIT
379379
COMMITTED CONCURRENTLY CONFIGURATION CONNECTION CONSTRAINT CONSTRAINTS
380-
CONTENT_P CONVERSION_PCONVERTCOPY COST CREATE CREATEDB
380+
CONTENT_P CONVERSION_P COPY COST CREATE CREATEDB
381381
CREATEROLE CREATEUSER CROSS CSV CURRENT_P CURRENT_DATE CURRENT_ROLE
382382
CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER CURSOR CYCLE
383383

@@ -8218,31 +8218,6 @@ func_expr:func_name '(' ')'
82188218
n->location =@1;
82198219
$$ = (Node *)n;
82208220
}
8221-
| CONVERT'(' a_expr USING any_name')'
8222-
{
8223-
FuncCall *n = makeNode(FuncCall);
8224-
A_Const *c = makeNode(A_Const);
8225-
8226-
c->val.type = T_String;
8227-
c->val.val.str = NameListToQuotedString($5);
8228-
8229-
n->funcname = SystemFuncName("convert_using");
8230-
n->args = list_make2($3, c);
8231-
n->agg_star =FALSE;
8232-
n->agg_distinct =FALSE;
8233-
n->location =@1;
8234-
$$ = (Node *)n;
8235-
}
8236-
| CONVERT'(' expr_list')'
8237-
{
8238-
FuncCall *n = makeNode(FuncCall);
8239-
n->funcname = SystemFuncName("convert");
8240-
n->args =$3;
8241-
n->agg_star =FALSE;
8242-
n->agg_distinct =FALSE;
8243-
n->location =@1;
8244-
$$ = (Node *)n;
8245-
}
82468221
| NULLIF'(' a_expr',' a_expr')'
82478222
{
82488223
$$ = (Node *) makeSimpleA_Expr(AEXPR_NULLIF,"=",$3,$5,@1);
@@ -9291,7 +9266,6 @@ col_name_keyword:
92919266
| CHAR_P
92929267
| CHARACTER
92939268
| COALESCE
9294-
| CONVERT
92959269
| DEC
92969270
| DECIMAL_P
92979271
| EXISTS

‎src/backend/parser/keywords.c

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.191 2007/08/21 15:13:42 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.192 2007/09/24 01:29:29 adunstan Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -93,7 +93,6 @@ static const ScanKeyword ScanKeywords[] = {
9393
{"constraints",CONSTRAINTS,UNRESERVED_KEYWORD},
9494
{"content",CONTENT_P,UNRESERVED_KEYWORD},
9595
{"conversion",CONVERSION_P,UNRESERVED_KEYWORD},
96-
{"convert",CONVERT,COL_NAME_KEYWORD},
9796
{"copy",COPY,UNRESERVED_KEYWORD},
9897
{"cost",COST,UNRESERVED_KEYWORD},
9998
{"create",CREATE,RESERVED_KEYWORD},

‎src/include/catalog/pg_proc.h

Lines changed: 1 addition & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.471 2007/09/20 17:56:32 tgl Exp $
10+
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.472 2007/09/24 01:29:29 adunstan Exp $
1111
*
1212
* NOTES
1313
* The script catalog/genbki.sh reads this file and generates .bki
@@ -2244,9 +2244,6 @@ DESCR("convert string with specified destination encoding name");
22442244
DATA(insertOID=1813 (convertPGNSPPGUID1210fftfs317"17 19 19"_null__null__null_pg_convert-_null__null_ ));
22452245
DESCR("convert string with specified encoding names");
22462246

2247-
DATA(insertOID=1619 (convert_usingPGNSPPGUID1210fftfs217"25 25"_null__null__null_pg_convert_using-_null__null_ ));
2248-
DESCR("convert string with specified conversion name");
2249-
22502247
DATA(insertOID=1264 (pg_char_to_encodingPGNSPPGUID1210fftfs123"19"_null__null__null_PG_char_to_encoding-_null__null_ ));
22512248
DESCR("convert encoding name to encoding id");
22522249

‎src/include/utils/builtins.h

Lines changed: 1 addition & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.303 2007/09/18 17:41:17 adunstan Exp $
10+
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.304 2007/09/24 01:29:30 adunstan Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -941,9 +941,6 @@ extern Datum pg_advisory_unlock_all(PG_FUNCTION_ARGS);
941941
/* access/transam/twophase.c */
942942
externDatumpg_prepared_xact(PG_FUNCTION_ARGS);
943943

944-
/* catalog/pg_conversion.c */
945-
externDatumpg_convert_using(PG_FUNCTION_ARGS);
946-
947944
/* commands/prepare.c */
948945
externDatumpg_prepared_statement(PG_FUNCTION_ARGS);
949946

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