fix(sqlite): Extract columns from CREATE TABLE ... AS statement

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

@@ -0,0 +1,5 @@
+-- name: ListCopyAll :many
+SELECT * FROM copy_all;
+
+-- name: GetCopySome :one
+SELECT id, label FROM copy_some WHERE id = ?;

internal/endtoend/testdata/create_table_as/sqlite/schema.sql

@@ -0,0 +1,5 @@
+CREATE TABLE foo (id INTEGER PRIMARY KEY, val TEXT NOT NULL, score INTEGER NOT NULL);
+
+CREATE TABLE copy_all AS SELECT * FROM foo;
+
+CREATE TABLE IF NOT EXISTS copy_some AS SELECT id, val AS label FROM foo WHERE score > 0;

internal/endtoend/testdata/create_table_as/sqlite/sqlc.json

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

internal/engine/sqlite/convert.go

@@ -282,12 +282,21 @@ func columnTypeName(t *meyer.TypeName) string {
 }
 
 func (c *cc) convertCreateTableStmt(n *meyer.CreateTableStmt) ast.Node {
+	// CREATE TABLE ... AS SELECT takes its columns from the query, so it is
+	// recorded as a relation defined by that query.
+	if n.Select != nil {
+		return &ast.CreateTableAsStmt{
+			Query:       c.convert(n.Select),
+			Into:        &ast.IntoClause{Rel: parseRangeVar(n.Name, nil)},
+			IfNotExists: n.IfNotExists,
+		}
+	}
 	stmt := &ast.CreateTableStmt{
 		Name:        parseTableName(n.Name),
 		IfNotExists: n.IfNotExists,
 		// The node models none of these, so a statement carrying them has
 		// no faithful rendering and the formatter keeps it as written.
-		Incomplete: n.Temp || n.Select != nil || len(n.Constraints) > 0 || len(n.Options) > 0,
+		Incomplete: n.Temp || len(n.Constraints) > 0 || len(n.Options) > 0,
 	}
 	for _, def := range n.Columns {
 		if !representableColumn(def) {