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Cause plpgsql to throw an error if "INTO rowtype_var" is followed by a comma.

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Per bug #5352, this helps to provide a useful error message if the user
tries to do something presently unsupported, namely use a rowtype variable
as a member of a multiple-item INTO list.
This commit is contained in:
Tom Lane 2010-03-02 16:14:39 +00:00
parent 5600aaccbd
commit e664969f0f
1 changed files with 22 additions and 1 deletions
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23
src/pl/plpgsql/src/gram.y
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/pl/plpgsql/src/gram.y,v 1.140 2010/01/19 01:35:30 tgl Exp $
* $PostgreSQL: pgsql/src/pl/plpgsql/src/gram.y,v 1.141 2010/03/02 16:14:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2881,6 +2881,13 @@ read_into_target(PLpgSQL_rec **rec, PLpgSQL_row **row, bool *strict)
tok = yylex();
}
/*
* Currently, a row or record variable can be the single INTO target,
* but not a member of a multi-target list. So we throw error if there
* is a comma after it, because that probably means the user tried to
* write a multi-target list. If this ever gets generalized, we should
* probably refactor read_into_scalar_list so it handles all cases.
*/
switch (tok)
{
case T_DATUM:
@ -2888,11 +2895,25 @@ read_into_target(PLpgSQL_rec **rec, PLpgSQL_row **row, bool *strict)
{
check_assignable(yylval.wdatum.datum, yylloc);
*row = (PLpgSQL_row *) yylval.wdatum.datum;
if ((tok = yylex()) == ',')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("record or row variable cannot be part of multiple-item INTO list"),
parser_errposition(yylloc)));
plpgsql_push_back_token(tok);
}
else if (yylval.wdatum.datum->dtype == PLPGSQL_DTYPE_REC)
{
check_assignable(yylval.wdatum.datum, yylloc);
*rec = (PLpgSQL_rec *) yylval.wdatum.datum;
if ((tok = yylex()) == ',')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("record or row variable cannot be part of multiple-item INTO list"),
parser_errposition(yylloc)));
plpgsql_push_back_token(tok);
}
else
{