feat(postgresql): Add materialized view support (#1509)

Author: ludusrusso

internal/endtoend/testdata/create_materialized_view/postgresql/go/db.go

@@ -0,0 +1,3 @@
+-- name: GetFirst :many
+SELECT * FROM mat_first_view;
+

internal/endtoend/testdata/create_materialized_view/postgresql/go/models.go

@@ -0,0 +1,3 @@
+CREATE TABLE foo (val text not null);
+
+CREATE MATERIALIZED VIEW mat_first_view AS SELECT * FROM foo;

internal/endtoend/testdata/create_materialized_view/postgresql/go/query.sql.go

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

internal/endtoend/testdata/create_materialized_view/postgresql/query.sql

@@ -0,0 +1,3 @@
+-- name: GetFirst :many
+SELECT * FROM second_table;
+