fix(engine/sqlite): added json_tree and json_each definitions

fix #1830

internal/codegen/golang/result.go

@@ -66,6 +66,9 @@ func buildStructs(req *plugin.CodeGenRequest) []Struct {
 		}
 		for _, table := range schema.Tables {
 			var tableName string
+			if table.Rel.Schema == "sqlc.hidden" {
+				continue
+			}
 			if schema.Name == req.Catalog.DefaultSchema {
 				tableName = table.Rel.Name
 			} else {

internal/engine/sqlite/stdlib.go

@@ -980,6 +980,55 @@ func defaultSchema(name string) *catalog.Schema {
 			},
 			ReturnType: &ast.TypeName{Name: "real"},
 		},
+		{
+			Name: "json_each",
+			Args: []*catalog.Argument{
+				{
+					Name: "json",
+					Type: &ast.TypeName{Name: "text"},
+				},
+				{
+					Name: "path",
+					Type: &ast.TypeName{Name: "text"},
+					Mode: ast.FuncParamVariadic,
+				},
+			},
+			ReturnType: &ast.TypeName{
+				Name: "json_tree",
+			},
+		},
+		{
+			Name: "json_tree",
+			Args: []*catalog.Argument{
+				{
+					Name: "json",
+					Type: &ast.TypeName{Name: "text"},
+				},
+				{
+					Name: "path",
+					Type: &ast.TypeName{Name: "text"},
+					Mode: ast.FuncParamVariadic,
+				},
+			},
+			ReturnType: &ast.TypeName{
+				Name: "json_tree",
+			},
+		},
+	}
+	s.Tables = []*catalog.Table{
+		{
+			Rel: &ast.TableName{Schema: "sqlc.hidden", Name: "json_tree"},
+			Columns: []*catalog.Column{
+				{Name: "key", Type: ast.TypeName{Name: "any"}},
+				{Name: "value", Type: ast.TypeName{Name: "any"}},
+				{Name: "type", Type: ast.TypeName{Name: "text"}},
+				{Name: "atom", Type: ast.TypeName{Name: "any"}},
+				{Name: "id", Type: ast.TypeName{Name: "integer"}},
+				{Name: "parent", Type: ast.TypeName{Name: "integer"}},
+				{Name: "fullkey", Type: ast.TypeName{Name: "integer"}},
+				{Name: "path", Type: ast.TypeName{Name: "text"}},
+			},
+		},
 	}
 	return s
 }