Use SQL standard error code for nextval

src/backend/commands/sequence.c

@@ -694,7 +694,7 @@ nextval_internal(Oid relid)
 
 					snprintf(buf, sizeof(buf), INT64_FORMAT, maxv);
 					ereport(ERROR,
-						  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+						  (errcode(ERRCODE_SEQUENCE_GENERATOR_LIMIT_EXCEEDED),
 						   errmsg("nextval: reached maximum value of sequence \"%s\" (%s)",
 								  RelationGetRelationName(seqrel), buf)));
 				}
@@ -717,7 +717,7 @@ nextval_internal(Oid relid)
 
 					snprintf(buf, sizeof(buf), INT64_FORMAT, minv);
 					ereport(ERROR,
-						  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+						  (errcode(ERRCODE_SEQUENCE_GENERATOR_LIMIT_EXCEEDED),
 						   errmsg("nextval: reached minimum value of sequence \"%s\" (%s)",
 								  RelationGetRelationName(seqrel), buf)));
 				}

src/backend/utils/errcodes.txt

@@ -188,6 +188,7 @@ Section: Class 22 - Data Exception
 22004    E    ERRCODE_NULL_VALUE_NOT_ALLOWED                                 null_value_not_allowed
 22002    E    ERRCODE_NULL_VALUE_NO_INDICATOR_PARAMETER                      null_value_no_indicator_parameter
 22003    E    ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE                             numeric_value_out_of_range
+2200H    E    ERRCODE_SEQUENCE_GENERATOR_LIMIT_EXCEEDED                      sequence_generator_limit_exceeded
 22026    E    ERRCODE_STRING_DATA_LENGTH_MISMATCH                            string_data_length_mismatch
 22001    E    ERRCODE_STRING_DATA_RIGHT_TRUNCATION                           string_data_right_truncation
 22011    E    ERRCODE_SUBSTRING_ERROR                                        substring_error