examples: Add the jets and booktest examples (#237)

Move the end-to-end test into its own package: internal/endtoend
Add a new package for creating temporary PostgreSQL schemas:
internal/sqltest

Author: kyleconroy

examples/booktest/mysql/db.go

@@ -0,0 +1,48 @@
+/* name: GetAuthor :one */
+SELECT * FROM authors
+WHERE author_id = ?;
+
+/* name: GetBook :one */
+SELECT * FROM books
+WHERE book_id = ?;
+
+/* name: DeleteBook :exec */
+DELETE FROM books
+WHERE book_id = ?;
+
+/* name: BooksByTitleYear :many */
+SELECT * FROM books
+WHERE title = ? AND yr = ?;
+
+/* name: CreateAuthor :exec */
+INSERT INTO authors (name) VALUES (?);
+
+/* name: CreateBook :exec */
+INSERT INTO books (
+    author_id,
+    isbn,
+    booktype,
+    title,
+    yr,
+    available,
+    tags
+) VALUES (
+    ?,
+    ?,
+    ?,
+    ?,
+    ?,
+    ?,
+    ?
+);
+
+/* name: UpdateBook :exec */
+UPDATE books
+SET title = ?, tags = ?
+WHERE book_id = ?;
+
+/* name: UpdateBookISBN :exec */
+UPDATE books
+SET title = ?, tags = ?, isbn = ?
+WHERE book_id = ?;
+

examples/booktest/mysql/models.go

@@ -0,0 +1,32 @@
+SET FOREIGN_KEY_CHECKS=0;
+DROP TABLE IF EXISTS authors;
+DROP TABLE IF EXISTS books;
+-- DROP FUNCTION IF EXISTS say_hello;
+SET FOREIGN_KEY_CHECKS=1;
+
+CREATE TABLE authors (
+          author_id integer NOT NULL AUTO_INCREMENT PRIMARY KEY,
+          name text NOT NULL DEFAULT ''
+) ENGINE=InnoDB;
+
+CREATE INDEX authors_name_idx ON authors(name(255));
+
+CREATE TABLE books (
+          book_id integer NOT NULL AUTO_INCREMENT PRIMARY KEY,
+          author_id integer NOT NULL,
+          isbn varchar(255) NOT NULL DEFAULT '' UNIQUE,
+          book_type ENUM('FICTION', 'NONFICTION') NOT NULL DEFAULT 'FICTION',
+          title text NOT NULL DEFAULT '',
+          yr integer NOT NULL DEFAULT 2000,
+          available datetime NOT NULL DEFAULT NOW(),
+          tags text NOT NULL DEFAULT ''
+          -- CONSTRAINT FOREIGN KEY (author_id) REFERENCES authors(author_id)
+) ENGINE=InnoDB;
+
+CREATE INDEX books_title_idx ON books(title(255), yr);
+
+/*
+CREATE FUNCTION say_hello(s text) RETURNS text
+  DETERMINISTIC
+  RETURN CONCAT('hello ', s);
+*/