From 9f1714087a0acc48ec7d1320e3fb1b5c3f609fe6 Mon Sep 17 00:00:00 2001
From: Kyle Conroy <kyle@conroy.org>
Date: Wed, 25 Dec 2019 13:53:59 -0800
Subject: [PATCH] dinosql/internal: Ignore alter sequence commands

sqlc does not support sequence DDL currently. Ignore DDL that touches
sequences.
---
 internal/catalog/build.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/internal/catalog/build.go b/internal/catalog/build.go
index 6931a2ea13..830472c721 100644
--- a/internal/catalog/build.go
+++ b/internal/catalog/build.go
@@ -68,6 +68,7 @@ func Update(c *pg.Catalog, stmt nodes.Node) error {
 	if !ok {
 		return fmt.Errorf("expected RawStmt; got %T", stmt)
 	}
+
 	switch n := raw.Stmt.(type) {
 
 	case nodes.AlterObjectSchemaStmt:
@@ -97,6 +98,28 @@ func Update(c *pg.Catalog, stmt nodes.Node) error {
 		}
 
 	case nodes.AlterTableStmt:
+		var implemented bool
+		for _, item := range n.Cmds.Items {
+			switch cmd := item.(type) {
+			case nodes.AlterTableCmd:
+				switch cmd.Subtype {
+				case nodes.AT_AddColumn:
+					implemented = true
+				case nodes.AT_AlterColumnType:
+					implemented = true
+				case nodes.AT_DropColumn:
+					implemented = true
+				case nodes.AT_DropNotNull:
+					implemented = true
+				case nodes.AT_SetNotNull:
+					implemented = true
+				}
+			}
+		}
+
+		if !implemented {
+			return nil
+		}
 		fqn, err := ParseRange(n.Relation)
 		if err != nil {
 			return err