fix(sqlite): Fix DROP TABLE (#1443)

* Improve test to illustrate correctness
* Add tests for:
  * Renaming tables
  * Renaming columns
  * Renaming columns without COLUMN keyword
  * Adding a column
  * Creating a trigger
  * Dropping a table if exists

Author: PadraigK

internal/endtoend/testdata/ddl_alter_table_add_column/sqlite/go/db.go

@@ -0,0 +1,2 @@
+/* name: Placeholder :many */
+SELECT * from venues;

internal/endtoend/testdata/ddl_alter_table_add_column/sqlite/go/models.go

@@ -0,0 +1,3 @@
+CREATE TABLE venues (name text);
+ALTER TABLE venues ADD location text;
+ALTER TABLE venues ADD COLUMN size integer;

internal/endtoend/testdata/ddl_alter_table_add_column/sqlite/go/query.sql.go

@@ -0,0 +1,12 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "_lemon",
+      "name": "querytest",
+      "schema": "schema.sql",
+      "queries": "query.sql"
+    }
+  ]
+}

internal/endtoend/testdata/ddl_alter_table_add_column/sqlite/query.sql

@@ -1,2 +1,2 @@
 -- name: Placeholder :exec
-SELECT 1;
+SELECT * from foo;