Fix wording of error messages: "You may need ..." -> "You might need ...".

This was done in the upstream earlier already, in commit 8b4ff8b6, but there
were a few GPDB-added error messages left. Fix those too, for consistency.

src/backend/parser/analyze.c

@@ -4220,8 +4220,7 @@ static Node* grouped_window_mutator(Node *node, void *context)
 			ereport(ERROR,
 					(errcode(ERRCODE_WINDOWING_ERROR),
 					 errmsg("unresolved grouping key in window query"),
-					 errhint("You may need to use explicit aliases and/or to refer to grouping "
-							 "keys in the same way throughout the query.")));
+					 errhint("You might need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.")));
 	}
 	else
 	{

src/backend/parser/parse_expr.c

@@ -2389,7 +2389,7 @@ transformPercentileExpr(ParseState *pstate, PercentileExpr *p)
 					 errmsg("function \"%s\" does not exist",
 						 percentileFuncString(p, &argtype, 1, NULL, 0)),
 					 errhint("No function matches the given name and argument types. "
-							 "You may need to add explicit type casts.")));
+							 "You might need to add explicit type casts.")));
 	}
 	argtype = FLOAT8OID;
 
@@ -2523,7 +2523,7 @@ transformPercentileExpr(ParseState *pstate, PercentileExpr *p)
 						 errmsg("function \"%s\" is not unique",
 							percentileFuncString(p, &argtype, 1, sorttypes, sortlen)),
 						 errhint("Could not choose a best candidate function. "
-								 "You may need to add explicit type casts.")));
+								 "You might need to add explicit type casts.")));
 		}
 		else if (ncandidates == 0)
 		{
@@ -2532,7 +2532,7 @@ transformPercentileExpr(ParseState *pstate, PercentileExpr *p)
 					 errmsg("function \"%s\" does not exist",
 						percentileFuncString(p, &argtype, 1, sorttypes, sortlen)),
 					 errhint("No function matches the given name and argument types. "
-							 "You may need to add explicit type casts.")));
+							 "You might need to add explicit type casts.")));
 		}
 
 		p->perctype = candidates->args[0];

src/backend/parser/parse_func.c

@@ -345,7 +345,7 @@ ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs,
 				 errmsg("function %s() does not exist",
 						NameListToString(funcname)),
 				 errhint("No function matches the given name and argument types. "
-						 "You may need to add explicit type casts."),
+						 "You might need to add explicit type casts."),
 				 parser_errposition(pstate, location)));
 	}
 

src/test/regress/expected/aggregates.out

@@ -708,25 +708,25 @@ select array_agg(distinct a,b,c order by i)
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by i)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,b,c order by a,b+1)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by a,b+1)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,b,c order by a,b,i,c)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by a,b,i,c)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,a,c order by a,b)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,a,c order by a,b)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- string_agg tests
 select string_agg(a) from (values('aaaa'),('bbbb'),('cccc')) g(a);
   string_agg  
@@ -798,12 +798,12 @@ SELECT a(aggtest order by a) from aggtest;   -- function-like column reference
 ERROR:  function a(aggtest) does not exist
 LINE 1: SELECT a(aggtest order by a) from aggtest;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT nosuchagg(a order by a) FROM aggtest; -- no such function
 ERROR:  function nosuchagg(smallint) does not exist
 LINE 1: SELECT nosuchagg(a order by a) FROM aggtest;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT lag(a order by a) from aggtest;       -- window function (no window clause)
 ERROR:  ORDER BY specified, but lag is not an ordered aggregate function
 LINE 1: SELECT lag(a order by a) from aggtest;

src/test/regress/expected/aggregates_optimizer.out

@@ -714,25 +714,25 @@ select array_agg(distinct a,b,c order by i)
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by i)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,b,c order by a,b+1)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by a,b+1)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,b,c order by a,b,i,c)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,b,c order by a,b,i,c)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select array_agg(distinct a,a,c order by a,b)
   from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
 ERROR:  function array_agg(integer, integer, text) does not exist
 LINE 1: select array_agg(distinct a,a,c order by a,b)
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- string_agg tests
 select string_agg(a) from (values('aaaa'),('bbbb'),('cccc')) g(a);
   string_agg  
@@ -804,12 +804,12 @@ SELECT a(aggtest order by a) from aggtest;   -- function-like column reference
 ERROR:  function a(aggtest) does not exist
 LINE 1: SELECT a(aggtest order by a) from aggtest;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT nosuchagg(a order by a) FROM aggtest; -- no such function
 ERROR:  function nosuchagg(smallint) does not exist
 LINE 1: SELECT nosuchagg(a order by a) FROM aggtest;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT lag(a order by a) from aggtest;       -- window function (no window clause)
 ERROR:  ORDER BY specified, but lag is not an ordered aggregate function
 LINE 1: SELECT lag(a order by a) from aggtest;

src/test/regress/expected/decode_expr.out

@@ -899,7 +899,7 @@ select decode(true, false);
 ERROR:  function decode(boolean, boolean) does not exist
 LINE 1: select decode(true, false);
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select decode(2);
 ERROR:  syntax error at or near ")"
 LINE 1: select decode(2);

src/test/regress/expected/default_parameters.out

@@ -26,7 +26,7 @@ select dfunc(10, 20, 30);  -- fail
 ERROR:  function dfunc(integer, integer, integer) does not exist
 LINE 1: select dfunc(10, 20, 30);
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 drop function dfunc();  -- fail
 ERROR:  function dfunc() does not exist
 drop function dfunc(int);  -- fail
@@ -93,7 +93,7 @@ select dfunc();  -- fail: which dfunc should be called? int or text
 ERROR:  function dfunc() is not unique
 LINE 1: select dfunc();
                ^
-HINT:  Could not choose a best candidate function. You may need to add explicit type casts.
+HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
 select dfunc('Hi');  -- ok
    dfunc   
 -----------
@@ -136,17 +136,17 @@ select dfunc();  -- fail
 ERROR:  function dfunc() is not unique
 LINE 1: select dfunc();
                ^
-HINT:  Could not choose a best candidate function. You may need to add explicit type casts.
+HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
 select dfunc(1);  -- fail
 ERROR:  function dfunc(integer) is not unique
 LINE 1: select dfunc(1);
                ^
-HINT:  Could not choose a best candidate function. You may need to add explicit type casts.
+HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
 select dfunc(1, 2);  -- fail
 ERROR:  function dfunc(integer, integer) is not unique
 LINE 1: select dfunc(1, 2);
                ^
-HINT:  Could not choose a best candidate function. You may need to add explicit type casts.
+HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
 select dfunc(1, 2, 3);  -- ok
  dfunc 
 -------
@@ -199,7 +199,7 @@ select dfunc();  -- fail
 ERROR:  function dfunc() does not exist
 LINE 1: select dfunc();
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select dfunc(10);
  dfunc 
 -------

src/test/regress/expected/filter.out

@@ -118,12 +118,12 @@ SELECT max(*) FROM filter_test;
 ERROR:  function max() does not exist
 LINE 1: SELECT max(*) FROM filter_test;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT max(*) FILTER (WHERE i < 5) FROM filter_test;
 ERROR:  function max() does not exist
 LINE 1: SELECT max(*) FILTER (WHERE i < 5) FROM filter_test;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Use old sort implementation
 set gp_enable_mk_sort=off;
 --- TEST MAX(i)
@@ -445,7 +445,7 @@ FROM filter_test ORDER BY j, i;
 ERROR:  function row_number(integer) does not exist
 LINE 1: select i, j, row_number() filter (WHERE i % 2 = 1) over (par...
                      ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select i, rank() over (order by i) from filter_test ORDER BY i;
  i  | rank 
 ----+------
@@ -465,7 +465,7 @@ select i, rank() filter (where true) over (order by i) from filter_test ORDER BY
 ERROR:  function rank(integer) does not exist
 LINE 1: select i, rank() filter (where true) over (order by i) from ...
                   ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select i, ntile(3) over (order by i) from filter_test ORDER BY i;
  i  | ntile 
 ----+-------
@@ -546,19 +546,19 @@ select i(t) filter (where true) from (select maketuple() as t) x order by i(t);
 ERROR:  function i(filter_test) does not exist
 LINE 1: select i(t) filter (where true) from (select maketuple() as ...
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 drop function maketuple();
 --- TEST non-exsistant function => same error
 select chocolate(i) from filter_test;
 ERROR:  function chocolate(integer) does not exist
 LINE 1: select chocolate(i) from filter_test;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select chocolate(i) filter (where true) from filter_test;
 ERROR:  function chocolate(integer) does not exist
 LINE 1: select chocolate(i) filter (where true) from filter_test;
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 --- TEST filter from outside scope => error
 select * from (select i from filter_test where j = 1) x1, 
               (select sum(i) filter (where i < x1.i) from filter_test where j = 2) x2;

src/test/regress/expected/olap_window.out

@@ -8162,7 +8162,7 @@ group by
     2*b.g,
     lower(f);
 ERROR:  unresolved grouping key in window query
-HINT:  You may need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
+HINT:  You might need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
 -- End MPP-12082
 -- MPP-13802
 select lag(x) over (w)

src/test/regress/expected/olap_window_optimizer.out

@@ -8162,7 +8162,7 @@ group by
     2*b.g,
     lower(f);
 ERROR:  unresolved grouping key in window query
-HINT:  You may need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
+HINT:  You might need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
 -- End MPP-12082
 -- MPP-13802
 select lag(x) over (w)

src/test/regress/expected/olap_window_seq.out

@@ -8016,7 +8016,7 @@ group by
     2*b.g,
     lower(f);
 ERROR:  unresolved grouping key in window query
-HINT:  You may need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
+HINT:  You might need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
 -- End MPP-12082
 -- MPP-12913
 select count(*) over (partition by 1 order by cn rows between 1 preceding and 1 preceding) from sale;

src/test/regress/expected/olap_window_seq_optimizer.out

@@ -8022,7 +8022,7 @@ group by
     2*b.g,
     lower(f);
 ERROR:  unresolved grouping key in window query
-HINT:  You may need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
+HINT:  You might need to use explicit aliases and/or to refer to grouping keys in the same way throughout the query.
 -- End MPP-12082
 -- MPP-12913
 select count(*) over (partition by 1 order by cn rows between 1 preceding and 1 preceding) from sale;

src/test/regress/expected/percentile.out

@@ -1079,17 +1079,17 @@ select median('text') from perct;
 ERROR:  function "median(unknown)" is not unique
 LINE 1: select median('text') from perct;
                       ^
-HINT:  Could not choose a best candidate function. You may need to add explicit type casts.
+HINT:  Could not choose a best candidate function. You might need to add explicit type casts.
 select percentile_cont(now()) within group (order by a) from percts;
 ERROR:  function "percentile_cont(timestamp with time zone)" does not exist
 LINE 1: select percentile_cont(now()) within group (order by a) from...
                                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select percentile_cont(0.5) within group (order by point(0,0)) from perct;
 ERROR:  function "percentile_cont(double precision) ORDER BY (point)" does not exist
 LINE 1: ...elect percentile_cont(0.5) within group (order by point(0,0)...
                                                              ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- outer reference is not allowed for now
 select (select a from perct where median(t.a) = 5) from perct t;
 ERROR:  percentile functions cannot reference columns from outer queries

src/test/regress/expected/timeseries.out

@@ -393,7 +393,7 @@ select linear_interpolate(5, 0, 'y0'::text, 100, 'y1'::text);
 ERROR:  function linear_interpolate(integer, integer, text, integer, text) does not exist
 LINE 1: select linear_interpolate(5, 0, 'y0'::text, 100, 'y1'::text)...
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Check that  "divide by zero" returns null
 select linear_interpolate('2010-01-03T02:00:00'::timestamp, '2010-01-02T09:20:00'::timestamp, 2000::int4, '2010-01-02T09:20:00'::timestamp, 2250::int4);
  linear_interpolate 

src/test/regress/expected/variadic_parameters.out

@@ -31,7 +31,7 @@ select myleast(); -- fail
 ERROR:  function myleast() does not exist
 LINE 1: select myleast();
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- test with variadic call parameter
 select myleast(variadic array[1,2,3,4,-1]);
  myleast 
@@ -92,7 +92,7 @@ create view print_name as select concat(' ',id, fname, lname) from people; -- fa
 ERROR:  function concat(unknown, integer, character varying, character varying) does not exist
 LINE 1: create view print_name as select concat(' ',id, fname, lname...
                                          ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 create view print_name as select concat(' ', fname, lname) from people where id < 790;
 select * from print_name;
   concat   
@@ -138,17 +138,17 @@ select formarray(1.1, array[1.2,55.5]); -- fail without variadic
 ERROR:  function formarray(numeric, numeric[]) does not exist
 LINE 1: select formarray(1.1, array[1.2,55.5]);
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select formarray(1, 'x'::text); -- fail, type mismatch
 ERROR:  function formarray(integer, text) does not exist
 LINE 1: select formarray(1, 'x'::text);
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 select formarray(1, variadic array['x'::text]); -- fail, type mismatch
 ERROR:  function formarray(integer, text[]) does not exist
 LINE 1: select formarray(1, variadic array['x'::text]);
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 drop function formarray(anyelement, variadic anyarray);
 -- PLPGSQL
 -- test variadic functions

src/test/regress/output/table_functions.source

@@ -316,12 +316,12 @@ SELECT scalar_1(TABLE(select 1));  -- TableValue expression does not match type
 ERROR:  function scalar_1(anytable) does not exist
 LINE 1: SELECT scalar_1(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT scalar_5(TABLE(select 1));  -- TableValue shouldn't match "anyelement"
 ERROR:  function scalar_5(anytable) does not exist
 LINE 1: SELECT scalar_5(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Normal scalar input / table output functions
 -- begin equivalent */
 SELECT row(a+5, b)::example from example;
@@ -746,12 +746,12 @@ SELECT scalar_tf_1(TABLE(select 1));  -- TableValue expression does not match ty
 ERROR:  function scalar_tf_1(anytable) does not exist
 LINE 1: SELECT scalar_tf_1(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT scalar_tf_6(TABLE(select 1));  -- TableValue expression does not anyelement
 ERROR:  function scalar_tf_6(anytable) does not exist
 LINE 1: SELECT scalar_tf_6(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Table Functions   table input / table output
 -- begin equivalent
 SELECT * FROM example order by a, b;
@@ -1363,7 +1363,7 @@ SELECT * from nameres(TABLE(SELECT 5));  -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * from nameres(TABLE(SELECT 5));
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 CREATE FUNCTION nameres(anytable) RETURNS int
     AS '@abs_srcdir@/regress.so', 'multiset_scalar_value' LANGUAGE C READS SQL DATA;
 SELECT * from nameres(5);                -- should work
@@ -1383,7 +1383,7 @@ SELECT * from nameres(5);                -- should fail
 ERROR:  function nameres(integer) does not exist
 LINE 1: SELECT * from nameres(5);
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT * from nameres(TABLE(SELECT 5));  -- should work
  nameres 
 ---------
@@ -1395,12 +1395,12 @@ SELECT * from nameres(5);                -- should fail
 ERROR:  function nameres(integer) does not exist
 LINE 1: SELECT * from nameres(5);
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT * from nameres(TABLE(SELECT 5));  -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * from nameres(TABLE(SELECT 5));
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Error: anytable does NOT match anyelement
 CREATE FUNCTION nameres(anyelement) returns int 
   AS $$ SELECT $1 $$ LANGUAGE SQL CONTAINS SQL;
@@ -1408,7 +1408,7 @@ SELECT * FROM nameres( TABLE( SELECT 1) ); -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * FROM nameres( TABLE( SELECT 1) );
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 DROP FUNCTION nameres(anyelement);
 -- Must support resjunk scatter by clauses
 explain SELECT * FROM multiset_5( TABLE( SELECT * FROM example SCATTER BY a+1) );
@@ -2046,7 +2046,7 @@ SELECT multiset_2( (SELECT a from example) );       -- not a TableValue expressi
 ERROR:  function multiset_2(integer) does not exist
 LINE 1: SELECT multiset_2( (SELECT a from example) );
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT multiset_2( TABLE(SELECT * from example) );  -- not in the from clause
 ERROR:  table functions must be invoked in FROM clause
 SELECT multiset_3( TABLE(SELECT a from example) );  -- not in the from clause
@@ -2878,12 +2878,12 @@ SELECT extract(day from id) FROM project( TABLE( SELECT * FROM history ), 1);
 ERROR:  function pg_catalog.date_part(unknown, integer) does not exist
 LINE 1: SELECT extract(day from id) FROM project( TABLE( SELECT * FR...
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT "time"+1 FROM project( TABLE( SELECT * FROM history ), 2);
 ERROR:  operator does not exist: timestamp without time zone + integer
 LINE 1: SELECT "time"+1 FROM project( TABLE( SELECT * FROM history )...
                      ^
-HINT:  No operator matches the given name and argument type(s). You may need to add explicit type casts.
+HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
 -- ERROR: select columns projected out by the function
 SELECT id  FROM project( TABLE( SELECT * FROM history ), 2);
 ERROR:  column "id" does not exist
@@ -3074,7 +3074,7 @@ PREPARE p2 AS SELECT * FROM multiset_2( $1 ) order by a, b;
 ERROR:  function multiset_2(unknown) does not exist
 LINE 1: PREPARE p2 AS SELECT * FROM multiset_2( $1 ) order by a, b;
                                     ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 PREPARE p3(anytable) AS SELECT * FROM multiset_5( $1 ) order by a, b;
 ERROR:  type "anytable" is not a valid parameter for PREPARE
 -- FAIL: $1 is not a constant

src/test/regress/output/table_functions_optimizer.source

@@ -317,12 +317,12 @@ SELECT scalar_1(TABLE(select 1));  -- TableValue expression does not match type
 ERROR:  function scalar_1(anytable) does not exist
 LINE 1: SELECT scalar_1(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT scalar_5(TABLE(select 1));  -- TableValue shouldn't match "anyelement"
 ERROR:  function scalar_5(anytable) does not exist
 LINE 1: SELECT scalar_5(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Normal scalar input / table output functions
 -- begin equivalent */
 SELECT row(a+5, b)::example from example;
@@ -747,12 +747,12 @@ SELECT scalar_tf_1(TABLE(select 1));  -- TableValue expression does not match ty
 ERROR:  function scalar_tf_1(anytable) does not exist
 LINE 1: SELECT scalar_tf_1(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT scalar_tf_6(TABLE(select 1));  -- TableValue expression does not anyelement
 ERROR:  function scalar_tf_6(anytable) does not exist
 LINE 1: SELECT scalar_tf_6(TABLE(select 1));
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Table Functions   table input / table output
 -- begin equivalent
 SELECT * FROM example order by a, b;
@@ -1364,7 +1364,7 @@ SELECT * from nameres(TABLE(SELECT 5));  -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * from nameres(TABLE(SELECT 5));
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 CREATE FUNCTION nameres(anytable) RETURNS int
     AS '@abs_srcdir@/regress.so', 'multiset_scalar_value' LANGUAGE C READS SQL DATA;
 SELECT * from nameres(5);                -- should work
@@ -1384,7 +1384,7 @@ SELECT * from nameres(5);                -- should fail
 ERROR:  function nameres(integer) does not exist
 LINE 1: SELECT * from nameres(5);
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT * from nameres(TABLE(SELECT 5));  -- should work
  nameres 
 ---------
@@ -1396,12 +1396,12 @@ SELECT * from nameres(5);                -- should fail
 ERROR:  function nameres(integer) does not exist
 LINE 1: SELECT * from nameres(5);
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT * from nameres(TABLE(SELECT 5));  -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * from nameres(TABLE(SELECT 5));
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 -- Error: anytable does NOT match anyelement
 CREATE FUNCTION nameres(anyelement) returns int 
   AS $$ SELECT $1 $$ LANGUAGE SQL CONTAINS SQL;
@@ -1409,7 +1409,7 @@ SELECT * FROM nameres( TABLE( SELECT 1) ); -- should fail
 ERROR:  function nameres(anytable) does not exist
 LINE 1: SELECT * FROM nameres( TABLE( SELECT 1) );
                       ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 DROP FUNCTION nameres(anyelement);
 -- Must support resjunk scatter by clauses
 explain SELECT * FROM multiset_5( TABLE( SELECT * FROM example SCATTER BY a+1) );
@@ -2047,7 +2047,7 @@ SELECT multiset_2( (SELECT a from example) );       -- not a TableValue expressi
 ERROR:  function multiset_2(integer) does not exist
 LINE 1: SELECT multiset_2( (SELECT a from example) );
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT multiset_2( TABLE(SELECT * from example) );  -- not in the from clause
 ERROR:  table functions must be invoked in FROM clause
 SELECT multiset_3( TABLE(SELECT a from example) );  -- not in the from clause
@@ -2879,12 +2879,12 @@ SELECT extract(day from id) FROM project( TABLE( SELECT * FROM history ), 1);
 ERROR:  function pg_catalog.date_part(unknown, integer) does not exist
 LINE 1: SELECT extract(day from id) FROM project( TABLE( SELECT * FR...
                ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 SELECT "time"+1 FROM project( TABLE( SELECT * FROM history ), 2);
 ERROR:  operator does not exist: timestamp without time zone + integer
 LINE 1: SELECT "time"+1 FROM project( TABLE( SELECT * FROM history )...
                      ^
-HINT:  No operator matches the given name and argument type(s). You may need to add explicit type casts.
+HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
 -- ERROR: select columns projected out by the function
 SELECT id  FROM project( TABLE( SELECT * FROM history ), 2);
 ERROR:  column "id" does not exist
@@ -3075,7 +3075,7 @@ PREPARE p2 AS SELECT * FROM multiset_2( $1 ) order by a, b;
 ERROR:  function multiset_2(unknown) does not exist
 LINE 1: PREPARE p2 AS SELECT * FROM multiset_2( $1 ) order by a, b;
                                     ^
-HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
+HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
 PREPARE p3(anytable) AS SELECT * FROM multiset_5( $1 ) order by a, b;
 ERROR:  type "anytable" is not a valid parameter for PREPARE
 -- FAIL: $1 is not a constant