Ruby: add db downgrade script

Author: nickrolfe

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_comment_directive_def.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, AstNode child, Location loc
+where erb_comment_directive_def(id, child) and erb_ast_node_info(id, _, _, loc)
+select id, child, loc

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_directive_def.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, AstNode child, Location loc
+where erb_directive_def(id, child) and erb_ast_node_info(id, _, _, loc)
+select id, child, loc

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_graphql_directive_def.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, AstNode child, Location loc
+where erb_graphql_directive_def(id, child) and erb_ast_node_info(id, _, _, loc)
+select id, child, loc

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_output_directive_def.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, AstNode child, Location loc
+where erb_output_directive_def(id, child) and erb_ast_node_info(id, _, _, loc)
+select id, child, loc

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_template_def.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, Location loc
+where erb_template_def(id) and erb_ast_node_info(id, _, _, loc)
+select id, loc

ruby/downgrades/fabe9e179ed1e3d0e45ccfab6ce94b4bab02dee5/erb_tokeninfo.ql

@@ -0,0 +1,11 @@
+class AstNode extends @erb_ast_node {
+  string toString() { none() }
+}
+
+class Location extends @location {
+  string toString() { none() }
+}
+
+from AstNode id, int kind, string value, Location loc
+where erb_tokeninfo(id, kind, value) and erb_ast_node_info(id, _, _, loc)
+select id, kind, value, loc