converting schema: mysql's bigint converts to numeric instead of bigint

[acharis]

mysql:
bigint(20) unsigned not null auto_increment

got converted to:
numeric(21) GENERATED BY DEFAULT AS IDENTITY("SEQ_asdf") NOT NULL

[tazija]

Source MySQL table:

CREATE TABLE `t1` (`f1` SMALLINT, `f2` MEDIUMINT, `f3` INT, `f4` BIGINT);

will result in the following DDL:

CREATE TABLE "t1" ("f1" SMALLINT, "f2" INTEGER, "f3" INTEGER, "f4" BIGINT);

---

NuoDB types have always sign (UNSIGNED modifier is not allowed), therefore allowed ranges for MySQL UNSIGNED and NuoDB "signed" types will be different:

Column	MySQL Type	MySQL Range	NuoDB Type	NuoDB Range
f1	SMALLINT UNSIGNED	[0,65535]	SMALLINT	[-32768,32767]
f2	MEDIUMINT UNSIGNED	[0,16777215]	INTEGER	[-2147483648,2147483647]
f3	INT UNSIGNED	[0,4294967295]	INTEGER	[-2147483648,2147483647]
f3	BIGINT UNSIGNED	[0,18446744073709551615]	BIGINT	[-9223372036854775808,9223372036854775807]

NuoDB migrator converts each MySQL UNSIGNED type to the closest NuoDB numeric type, so that value loss & numeric overflow will not happen during data migration. Consider another MySQL table (note UNSIGNED modifier):

CREATE TABLE `t2` (`f1` SMALLINT UNSIGNED, `f2` MEDIUMINT UNSIGNED, `f3` INT UNSIGNED, `f4` BIGINT UNSIGNED);
INSERT INTO `t2` VALUES (65535, 16777215, 4294967295, 18446744073709551615);

will be converted to NuoDB table:

CREATE TABLE "t2" ("f1" INTEGER, "f2" INTEGER, "f3" BIGINT, "f4" NUMERIC(21));
-- table data will be migrated properly using bin/nuodb-migrator dump [...] & bin/nuodb-migrator load [...] commands