Check aliases when resolving references (#1110)

* compiler: Check aliases when resolving references

* Add testcase for nextval

Author: kyleconroy

internal/compiler/resolve.go

@@ -60,6 +60,9 @@ func resolveCatalogRefs(c *catalog.Catalog, qc *QueryCatalog, rvs []*ast.RangeVa
 		if err != nil {
 			return nil, err
 		}
+		if _, found := aliasMap[fqn.Name]; found {
+			continue
+		}
 		table, err := c.GetTable(fqn)
 		if err != nil {
 			// If the table name doesn't exist, fisrt check if it's a CTE

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

@@ -0,0 +1,25 @@
+create table events
+(
+    ID int
+);
+
+create table handled_events
+(
+    last_handled_id int,
+    handler text
+);
+
+
+-- name: SelectAllJoinedAlias :many
+select e.* from events e
+    inner join handled_events he
+       on e.ID > he.last_handled_id
+where he.handler = $1
+    for update of he skip locked;
+
+-- name: SelectAllJoined :many
+select events.* from events
+    inner join handled_events
+       on events.ID > handled_events.last_handled_id
+where handled_events.handler = $1
+    for update of handled_events skip locked;

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

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

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

@@ -0,0 +1,9 @@
+-- Simple table
+CREATE TABLE authors (
+  id   BIGSERIAL PRIMARY KEY
+);
+
+-- name: GetNextID :one
+SELECT pk, pk FROM
+ (SELECT nextval('authors_id_seq') as pk) AS alias;
+

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

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