Fix translatability markings in psql, and add defenses against future bugs.

Several previous commits have added columns to various \d queries without
updating their translate_columns[] arrays, leading to potentially incorrect
translations in NLS-enabled builds.  Offenders include commit 89368676
(added prosecdef to \df+), c9ac00e6 (added description to \dc+) and
3b17efdf (added description to \dC+).  Fix those cases back to 9.3 or
9.2 as appropriate.

Since this is evidently more easily missed than one would like, in HEAD
also add an Assert that the supplied array is long enough.  This requires
an API change for printQuery(), so it seems inappropriate for back
branches, but presumably all future changes will be tested in HEAD anyway.

In HEAD and 9.3, also clean up a whole lot of sloppiness in the emitted
SQL for \dy (event triggers): lack of translatability due to failing to
pass words-to-be-translated through gettext_noop(), inadequate schema
qualification, and sloppy formatting resulting in unnecessarily ugly
-E output.

Peter Eisentraut and Tom Lane, per bug #8702 from Sergey Burladyan

src/bin/psql/describe.c

@@ -224,7 +224,7 @@ describeFunctions(const char *functypes, const char *pattern, bool verbose, bool
 	PQExpBufferData buf;
 	PGresult   *res;
 	printQueryOpt myopt = pset.popt;
-	static const bool translate_columns[] = {false, false, false, false, true, true, false, false, false, false};
+	static const bool translate_columns[] = {false, false, false, false, true, true, true, false, false, false, false};
 
 	if (strlen(functypes) != strspn(functypes, "antwS+"))
 	{
@@ -457,6 +457,7 @@ describeFunctions(const char *functypes, const char *pattern, bool verbose, bool
 	myopt.title = _("List of functions");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -789,6 +790,7 @@ permissionsList(const char *pattern)
 	myopt.title = buf.data;
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -862,6 +864,7 @@ listDefaultACLs(const char *pattern)
 	myopt.title = buf.data;
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -1034,6 +1037,7 @@ objectDescription(const char *pattern, bool showSystem)
 	myopt.title = _("Object descriptions");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -2818,6 +2822,7 @@ listTables(const char *tabtypes, const char *pattern, bool verbose, bool showSys
 		myopt.title = _("List of relations");
 		myopt.translate_header = true;
 		myopt.translate_columns = translate_columns;
+		myopt.n_translate_columns = lengthof(translate_columns);
 
 		printQuery(res, &myopt, pset.queryFout, pset.logfile);
 	}
@@ -2999,7 +3004,8 @@ listConversions(const char *pattern, bool verbose, bool showSystem)
 	PQExpBufferData buf;
 	PGresult   *res;
 	printQueryOpt myopt = pset.popt;
-	static const bool translate_columns[] = {false, false, false, false, true};
+	static const bool translate_columns[] =
+		{false, false, false, false, true, false};
 
 	initPQExpBuffer(&buf);
 
@@ -3055,6 +3061,7 @@ listConversions(const char *pattern, bool verbose, bool showSystem)
 	myopt.title = _("List of conversions");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -3079,19 +3086,23 @@ listEventTriggers(const char *pattern, bool verbose)
 	initPQExpBuffer(&buf);
 
 	printfPQExpBuffer(&buf,
-					  "select evtname as \"%s\", "
-					  "evtevent as  \"%s\", "
-					  "pg_catalog.pg_get_userbyid(e.evtowner) AS \"%s\", "
-					  "case evtenabled when 'O' then 'enabled' "
-					  "  when 'R' then 'replica' "
-					  "  when 'A' then 'always' "
-					  "  when 'D' then 'disabled' end as  \"%s\", "
-					  "e.evtfoid::regproc as \"%s\", "
-					  "array_to_string(array(select x "
-					"      from unnest(evttags) as t(x)), ', ') as  \"%s\" ",
+					  "SELECT evtname as \"%s\", "
+					  "evtevent as \"%s\", "
+					  "pg_catalog.pg_get_userbyid(e.evtowner) as \"%s\",\n"
+					  " case evtenabled when 'O' then '%s'"
+					  "  when 'R' then '%s'"
+					  "  when 'A' then '%s'"
+					  "  when 'D' then '%s' end as \"%s\",\n"
+					  " e.evtfoid::pg_catalog.regproc as \"%s\", "
+					  "pg_catalog.array_to_string(array(select x"
+					  " from pg_catalog.unnest(evttags) as t(x)), ', ') as \"%s\"",
 					  gettext_noop("Name"),
 					  gettext_noop("Event"),
 					  gettext_noop("Owner"),
+					  gettext_noop("enabled"),
+					  gettext_noop("replica"),
+					  gettext_noop("always"),
+					  gettext_noop("disabled"),
 					  gettext_noop("Enabled"),
 					  gettext_noop("Procedure"),
 					  gettext_noop("Tags"));
@@ -3100,7 +3111,7 @@ listEventTriggers(const char *pattern, bool verbose)
 		",\npg_catalog.obj_description(e.oid, 'pg_event_trigger') as \"%s\"",
 						  gettext_noop("Description"));
 	appendPQExpBufferStr(&buf,
-						 "\nFROM pg_event_trigger e ");
+						 "\nFROM pg_catalog.pg_event_trigger e ");
 
 	processSQLNamePattern(pset.db, &buf, pattern, false, false,
 						  NULL, "evtname", NULL, NULL);
@@ -3116,6 +3127,7 @@ listEventTriggers(const char *pattern, bool verbose)
 	myopt.title = _("List of event triggers");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -3134,7 +3146,7 @@ listCasts(const char *pattern, bool verbose)
 	PQExpBufferData buf;
 	PGresult   *res;
 	printQueryOpt myopt = pset.popt;
-	static const bool translate_columns[] = {false, false, false, true};
+	static const bool translate_columns[] = {false, false, false, true, false};
 
 	initPQExpBuffer(&buf);
 
@@ -3214,6 +3226,7 @@ listCasts(const char *pattern, bool verbose)
 	myopt.title = _("List of casts");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -3289,6 +3302,7 @@ listCollations(const char *pattern, bool verbose, bool showSystem)
 	myopt.title = _("List of collations");
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -3548,6 +3562,7 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
 	myopt.topt.default_footer = false;
 	myopt.translate_header = true;
 	myopt.translate_columns = translate_columns;
+	myopt.n_translate_columns = lengthof(translate_columns);
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 
@@ -3579,6 +3594,7 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
 	myopt.topt.default_footer = true;
 	myopt.translate_header = true;
 	myopt.translate_columns = NULL;
+	myopt.n_translate_columns = 0;
 
 	printQuery(res, &myopt, pset.queryFout, pset.logfile);
 

src/bin/psql/print.c

@@ -2596,6 +2596,10 @@ printQuery(const PGresult *result, const printQueryOpt *opt, FILE *fout, FILE *f
 	printTableInit(&cont, &opt->topt, opt->title,
 				   PQnfields(result), PQntuples(result));
 
+	/* Assert caller supplied enough translate_columns[] entries */
+	Assert(opt->translate_columns == NULL ||
+		   opt->n_translate_columns >= cont.ncolumns);
+
 	for (i = 0; i < cont.ncolumns; i++)
 	{
 		char		align;

src/bin/psql/print.h

@@ -146,6 +146,7 @@ typedef struct printQueryOpt
 	bool		translate_header;		/* do gettext on column headers */
 	const bool *translate_columns;		/* translate_columns[i-1] => do
 										 * gettext on col i */
+	int			n_translate_columns;	/* length of translate_columns[] */
 } printQueryOpt;
 
 

src/bin/scripts/createlang.c

@@ -160,6 +160,8 @@ main(int argc, char *argv[])
 		popt.title = _("Procedural Languages");
 		popt.translate_header = true;
 		popt.translate_columns = translate_columns;
+		popt.n_translate_columns = lengthof(translate_columns);
+
 		printQuery(result, &popt, stdout, NULL);
 
 		PQfinish(conn);

src/bin/scripts/droplang.c

@@ -159,6 +159,8 @@ main(int argc, char *argv[])
 		popt.title = _("Procedural Languages");
 		popt.translate_header = true;
 		popt.translate_columns = translate_columns;
+		popt.n_translate_columns = lengthof(translate_columns);
+
 		printQuery(result, &popt, stdout, NULL);
 
 		PQfinish(conn);