immigrant-generator-postgres 0.2.0

Immigrant migrations generator for postgres SQL dialect
Documentation 
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!!!TEST A
scalar test = sql"INTEGER";

table A {
	test;
};

table B {
	test ~ A;
};
!!!UPDATE
scalar test = sql"INTEGER";

table A {
	test "test2";
};

table B {
	test "test2" ~ A;
};
!!!RESULT
-- updated: A --
CREATE DOMAIN test AS INTEGER;
CREATE TABLE "as" (
	test test NOT NULL
);
CREATE TABLE bs (
	test test NOT NULL
);
ALTER TABLE bs ADD CONSTRAINT bs_test_fk FOREIGN KEY(test) REFERENCES "as"(test);
-- updated --
ALTER TABLE "as" RENAME COLUMN test TO test2;
ALTER TABLE bs RENAME COLUMN test TO test2;
ALTER TABLE bs RENAME CONSTRAINT bs_test_fk TO bs_test2_fk;
-- updated: cleanup schema changes --
ALTER TABLE bs DROP CONSTRAINT bs_test2_fk;
DROP TABLE "as";
DROP TABLE bs;
DROP DOMAIN test;