diff --git a/src/pl/plpgsql/src/expected/plpgsql_control.out b/src/pl/plpgsql/src/expected/plpgsql_control.out
index 328bd485861..ccd4f547042 100644
--- a/src/pl/plpgsql/src/expected/plpgsql_control.out
+++ b/src/pl/plpgsql/src/expected/plpgsql_control.out
@@ -681,3 +681,20 @@ select case_test(13);
other
(1 row)
+-- test line comment between WHEN and THEN
+create or replace function case_comment(int) returns text as $$
+begin
+ case $1
+ when 1 -- comment before THEN
+ then return 'one';
+ else
+ return 'other';
+ end case;
+end;
+$$ language plpgsql immutable;
+select case_comment(1);
+ case_comment
+--------------
+ one
+(1 row)
+
diff --git a/src/pl/plpgsql/src/pl_gram.y b/src/pl/plpgsql/src/pl_gram.y
index debbafead8e..c7b3a50a705 100644
--- a/src/pl/plpgsql/src/pl_gram.y
+++ b/src/pl/plpgsql/src/pl_gram.y
@@ -69,7 +69,6 @@ static PLpgSQL_expr *read_sql_construct(int until,
RawParseMode parsemode,
bool isexpression,
bool valid_sql,
- bool trim,
int *startloc,
int *endtoken);
static PLpgSQL_expr *read_sql_expression(int until,
@@ -923,7 +922,7 @@ stmt_perform : K_PERFORM
*/
new->expr = read_sql_construct(';', 0, 0, ";",
RAW_PARSE_DEFAULT,
- false, false, true,
+ false, false,
&startloc, NULL);
/* overwrite "perform" ... */
memcpy(new->expr->query, " SELECT", 7);
@@ -1009,7 +1008,7 @@ stmt_assign : T_DATUM
plpgsql_push_back_token(T_DATUM);
new->expr = read_sql_construct(';', 0, 0, ";",
pmode,
- false, true, true,
+ false, true,
NULL, NULL);
$$ = (PLpgSQL_stmt *) new;
@@ -1498,7 +1497,6 @@ for_control : for_variable K_IN
RAW_PARSE_DEFAULT,
true,
false,
- true,
&expr1loc,
&tok);
@@ -1903,7 +1901,7 @@ stmt_raise : K_RAISE
expr = read_sql_construct(',', ';', K_USING,
", or ; or USING",
RAW_PARSE_PLPGSQL_EXPR,
- true, true, true,
+ true, true,
NULL, &tok);
new->params = lappend(new->params, expr);
}
@@ -2040,7 +2038,7 @@ stmt_dynexecute : K_EXECUTE
expr = read_sql_construct(K_INTO, K_USING, ';',
"INTO or USING or ;",
RAW_PARSE_PLPGSQL_EXPR,
- true, true, true,
+ true, true,
NULL, &endtoken);
new = palloc(sizeof(PLpgSQL_stmt_dynexecute));
@@ -2079,7 +2077,7 @@ stmt_dynexecute : K_EXECUTE
expr = read_sql_construct(',', ';', K_INTO,
", or ; or INTO",
RAW_PARSE_PLPGSQL_EXPR,
- true, true, true,
+ true, true,
NULL, &endtoken);
new->params = lappend(new->params, expr);
} while (endtoken == ',');
@@ -2663,7 +2661,7 @@ read_sql_expression(int until, const char *expected)
{
return read_sql_construct(until, 0, 0, expected,
RAW_PARSE_PLPGSQL_EXPR,
- true, true, true, NULL, NULL);
+ true, true, NULL, NULL);
}
/* Convenience routine to read an expression with two possible terminators */
@@ -2673,7 +2671,7 @@ read_sql_expression2(int until, int until2, const char *expected,
{
return read_sql_construct(until, until2, 0, expected,
RAW_PARSE_PLPGSQL_EXPR,
- true, true, true, NULL, endtoken);
+ true, true, NULL, endtoken);
}
/* Convenience routine to read a SQL statement that must end with ';' */
@@ -2682,7 +2680,7 @@ read_sql_stmt(void)
{
return read_sql_construct(';', 0, 0, ";",
RAW_PARSE_DEFAULT,
- false, true, true, NULL, NULL);
+ false, true, NULL, NULL);
}
/*
@@ -2695,7 +2693,6 @@ read_sql_stmt(void)
* parsemode: raw_parser() mode to use
* isexpression: whether to say we're reading an "expression" or a "statement"
* valid_sql: whether to check the syntax of the expr
- * trim: trim trailing whitespace
* startloc: if not NULL, location of first token is stored at *startloc
* endtoken: if not NULL, ending token is stored at *endtoken
* (this is only interesting if until2 or until3 isn't zero)
@@ -2708,7 +2705,6 @@ read_sql_construct(int until,
RawParseMode parsemode,
bool isexpression,
bool valid_sql,
- bool trim,
int *startloc,
int *endtoken)
{
@@ -2716,6 +2712,7 @@ read_sql_construct(int until,
StringInfoData ds;
IdentifierLookup save_IdentifierLookup;
int startlocation = -1;
+ int endlocation = -1;
int parenlevel = 0;
PLpgSQL_expr *expr;
@@ -2766,6 +2763,8 @@ read_sql_construct(int until,
expected),
parser_errposition(yylloc)));
}
+ /* Remember end+1 location of last accepted token */
+ endlocation = yylloc + plpgsql_token_length();
}
plpgsql_IdentifierLookup = save_IdentifierLookup;
@@ -2776,7 +2775,7 @@ read_sql_construct(int until,
*endtoken = tok;
/* give helpful complaint about empty input */
- if (startlocation >= yylloc)
+ if (startlocation >= endlocation)
{
if (isexpression)
yyerror("missing expression");
@@ -2784,14 +2783,14 @@ read_sql_construct(int until,
yyerror("missing SQL statement");
}
- plpgsql_append_source_text(&ds, startlocation, yylloc);
-
- /* trim any trailing whitespace, for neatness */
- if (trim)
- {
- while (ds.len > 0 && scanner_isspace(ds.data[ds.len - 1]))
- ds.data[--ds.len] = '\0';
- }
+ /*
+ * We save only the text from startlocation to endlocation-1. This
+ * suppresses the "until" token as well as any whitespace or comments
+ * following the last accepted token. (We used to strip such trailing
+ * whitespace by hand, but that causes problems if there's a "-- comment"
+ * in front of said whitespace.)
+ */
+ plpgsql_append_source_text(&ds, startlocation, endlocation);
expr = palloc0(sizeof(PLpgSQL_expr));
expr->query = pstrdup(ds.data);
@@ -3932,16 +3931,12 @@ read_cursor_args(PLpgSQL_var *cursor, int until)
* Read the value expression. To provide the user with meaningful
* parse error positions, we check the syntax immediately, instead of
* checking the final expression that may have the arguments
- * reordered. Trailing whitespace must not be trimmed, because
- * otherwise input of the form (param -- comment\n, param) would be
- * translated into a form where the second parameter is commented
- * out.
+ * reordered.
*/
item = read_sql_construct(',', ')', 0,
",\" or \")",
RAW_PARSE_PLPGSQL_EXPR,
true, true,
- false, /* do not trim */
NULL, &endtoken);
argv[argpos] = item->query;
diff --git a/src/pl/plpgsql/src/pl_scanner.c b/src/pl/plpgsql/src/pl_scanner.c
index aa1beb6a9aa..521d569f459 100644
--- a/src/pl/plpgsql/src/pl_scanner.c
+++ b/src/pl/plpgsql/src/pl_scanner.c
@@ -184,6 +184,8 @@ plpgsql_yylex(void)
tok1 = T_DATUM;
else
tok1 = T_CWORD;
+ /* Adjust token length to include A.B.C */
+ aux1.leng = aux5.lloc - aux1.lloc + aux5.leng;
}
else
{
@@ -197,6 +199,8 @@ plpgsql_yylex(void)
tok1 = T_DATUM;
else
tok1 = T_CWORD;
+ /* Adjust token length to include A.B */
+ aux1.leng = aux3.lloc - aux1.lloc + aux3.leng;
}
}
else
@@ -210,6 +214,8 @@ plpgsql_yylex(void)
tok1 = T_DATUM;
else
tok1 = T_CWORD;
+ /* Adjust token length to include A.B */
+ aux1.leng = aux3.lloc - aux1.lloc + aux3.leng;
}
}
else
@@ -298,6 +304,17 @@ plpgsql_yylex(void)
return tok1;
}
+/*
+ * Return the length of the token last returned by plpgsql_yylex().
+ *
+ * In the case of compound tokens, the length includes all the parts.
+ */
+int
+plpgsql_token_length(void)
+{
+ return plpgsql_yyleng;
+}
+
/*
* Internal yylex function. This wraps the core lexer and adds one feature:
* a token pushback stack. We also make a couple of trivial single-token
diff --git a/src/pl/plpgsql/src/plpgsql.h b/src/pl/plpgsql/src/plpgsql.h
index 2b6cda69428..471086ee151 100644
--- a/src/pl/plpgsql/src/plpgsql.h
+++ b/src/pl/plpgsql/src/plpgsql.h
@@ -1321,6 +1321,7 @@ extern void plpgsql_dumptree(PLpgSQL_function *func);
*/
extern int plpgsql_base_yylex(void);
extern int plpgsql_yylex(void);
+extern int plpgsql_token_length(void);
extern void plpgsql_push_back_token(int token);
extern bool plpgsql_token_is_unreserved_keyword(int token);
extern void plpgsql_append_source_text(StringInfo buf,
diff --git a/src/pl/plpgsql/src/sql/plpgsql_control.sql b/src/pl/plpgsql/src/sql/plpgsql_control.sql
index ed7231134f4..8e007c51dca 100644
--- a/src/pl/plpgsql/src/sql/plpgsql_control.sql
+++ b/src/pl/plpgsql/src/sql/plpgsql_control.sql
@@ -486,3 +486,17 @@ select case_test(1);
select case_test(2);
select case_test(12);
select case_test(13);
+
+-- test line comment between WHEN and THEN
+create or replace function case_comment(int) returns text as $$
+begin
+ case $1
+ when 1 -- comment before THEN
+ then return 'one';
+ else
+ return 'other';
+ end case;
+end;
+$$ language plpgsql immutable;
+
+select case_comment(1);
diff --git a/src/test/regress/expected/plpgsql.out b/src/test/regress/expected/plpgsql.out
index 08e42f17dc2..78d3bc06338 100644
--- a/src/test/regress/expected/plpgsql.out
+++ b/src/test/regress/expected/plpgsql.out
@@ -2390,11 +2390,9 @@ select namedparmcursor_test7();
ERROR: division by zero
CONTEXT: SQL expression "42/0 AS p1, 77 AS p2"
PL/pgSQL function namedparmcursor_test7() line 6 at OPEN
--- check that line comments work correctly within the argument list (there
--- is some special handling of this case in the code: the newline after the
--- comment must be preserved when the argument-evaluating query is
--- constructed, otherwise the comment effectively comments out the next
--- argument, too)
+-- check that line comments work correctly within the argument list
+-- (this used to require a special hack in the code; it no longer does,
+-- but let's keep the test anyway)
create function namedparmcursor_test8() returns int4 as $$
declare
c1 cursor (p1 int, p2 int) for
diff --git a/src/test/regress/sql/plpgsql.sql b/src/test/regress/sql/plpgsql.sql
index 588c3310337..cfff49c5e78 100644
--- a/src/test/regress/sql/plpgsql.sql
+++ b/src/test/regress/sql/plpgsql.sql
@@ -2047,11 +2047,9 @@ begin
end $$ language plpgsql;
select namedparmcursor_test7();
--- check that line comments work correctly within the argument list (there
--- is some special handling of this case in the code: the newline after the
--- comment must be preserved when the argument-evaluating query is
--- constructed, otherwise the comment effectively comments out the next
--- argument, too)
+-- check that line comments work correctly within the argument list
+-- (this used to require a special hack in the code; it no longer does,
+-- but let's keep the test anyway)
create function namedparmcursor_test8() returns int4 as $$
declare
c1 cursor (p1 int, p2 int) for