Fix CORE-6502: remove integrity checking triggers on RDB$USER_PRIVILEGES.

Direct modification of the table has been forbidden since 3.0.
GRANT operations from DDL perform theirown checks.
It requires backup/restore but can work if you do not need to perform
GRANTs descrobed in the ticket.

Author: romansimakov

src/jrd/ini.epp

@@ -168,15 +168,6 @@ static const jrd_trg triggers[] =
 	{ "RDB$TRIGGER_27", (UCHAR) nam_r_fields,
 		RDB$TRIGGERS.RDB$TRIGGER_TYPE.POST_ERASE, sizeof(trigger27),
 		trigger27, 0, ODS_8_0 },
-	{ "RDB$TRIGGER_31", (UCHAR) nam_user_privileges,
-		RDB$TRIGGERS.RDB$TRIGGER_TYPE.PRE_MODIFY, sizeof(trigger31),
-		trigger31, 0, ODS_8_1 },
-	{ "RDB$TRIGGER_32", (UCHAR) nam_user_privileges,
-		RDB$TRIGGERS.RDB$TRIGGER_TYPE.PRE_ERASE, sizeof(trigger31), trigger31,
-		0, ODS_8_1 },
-	{ "RDB$TRIGGER_33", (UCHAR) nam_user_privileges,
-		RDB$TRIGGERS.RDB$TRIGGER_TYPE.PRE_STORE, sizeof(trigger31), trigger31,
-		0, ODS_8_1 },
 	{ "RDB$TRIGGER_34", (UCHAR) nam_rel_constr,
 		RDB$TRIGGERS.RDB$TRIGGER_TYPE.POST_ERASE, sizeof(trigger34),
 		trigger34, TRG_ignore_perm, ODS_8_1 },
@@ -224,9 +215,6 @@ static const trigger_msg trigger_messages[] =
 	{ "RDB$TRIGGER_26", 1, "constaint_on_view", ODS_8_0 },
 	{ "RDB$TRIGGER_26", 2, "invld_cnstrnt_type", ODS_8_0 },
 	{ "RDB$TRIGGER_26", 3, "primary_key_exists", ODS_8_0 },
-	{ "RDB$TRIGGER_31", 0, "no_write_user_priv", ODS_8_1 },
-	{ "RDB$TRIGGER_32", 0, "no_write_user_priv", ODS_8_1 },
-	{ "RDB$TRIGGER_33", 0, "no_write_user_priv", ODS_8_1 },
 	{ "RDB$TRIGGER_24", 2, "integ_index_seg_mod", ODS_11_0 },
 	{ "RDB$TRIGGER_36", 1, "integ_index_seg_mod", ODS_11_0 },
 	{ 0, 0, 0, 0 }

src/jrd/trig.h

@@ -1930,56 +1930,6 @@ static const UCHAR trigger27[] =
 };
 
 
-/* new trigger to create ODS 8.1 (and to upgrade from ODS 8.0 to ODS 8.1 */
-static const UCHAR trigger31[] =
-{
-	blr_version5,
-	blr_begin,
-	blr_if,
-	blr_and,
-	blr_not,
-	blr_missing,
-	blr_field, 1, 11, 'R', 'D', 'B', '$', 'G', 'R', 'A', 'N', 'T', 'O', 'R',
-	blr_and,
-	blr_neq,
-	blr_field, 1, 11, 'R', 'D', 'B', '$', 'G', 'R', 'A', 'N', 'T', 'O', 'R',
-	blr_user_name,
-	blr_neq,
-	blr_sys_function, 20, 'R','D','B','$','S','Y','S','T','E','M','_','P','R','I','V','I','L','E','G','E',1,
-	blr_literal, blr_short, 0, Jrd::USE_GRANTED_BY_CLAUSE,0,
-	blr_literal, blr_bool, 1,
-	blr_begin,
-	blr_for,
-	blr_rse, 1,
-	blr_relation, 13, 'R', 'D', 'B', '$', 'R', 'E', 'L', 'A', 'T', 'I', 'O',
-		'N', 'S', 3,
-	blr_boolean,
-	blr_eql,
-	blr_field, 3, 17, 'R', 'D', 'B', '$', 'R', 'E', 'L', 'A', 'T', 'I', 'O',
-		'N', '_', 'N', 'A', 'M', 'E',
-	blr_literal, blr_text, 12, 0, 'R', 'D', 'B', '$', 'D', 'A', 'T', 'A', 'B',
-		'A', 'S', 'E',
-	blr_end,
-	blr_begin,
-	blr_if,
-	blr_or,
-	blr_missing,
-	blr_field, 3, 14, 'R', 'D', 'B', '$', 'O', 'W', 'N', 'E', 'R', '_', 'N',
-		'A', 'M', 'E',
-	blr_neq,
-	blr_field, 3, 14, 'R', 'D', 'B', '$', 'O', 'W', 'N', 'E', 'R', '_', 'N',
-		'A', 'M', 'E',
-	blr_user_name,
-	blr_leave, 0,
-	blr_end,
-	blr_end,
-	blr_end,
-	blr_end,
-	blr_end,
-	blr_eoc
-};
-
-
 /* ODS 8.1 trigger  */
 static const UCHAR trigger34[] =
 {