Implement SHOW DDLS statement (#74)

* Implement SHOW DDLS statement

* Update README.md

* Make SHOW DDLS headers empty

* Update golangci-lint to avoid timeout

.github/workflows/golangci-lint.yml

@@ -23,4 +23,5 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.60
+          version: latest
+          args: --timeout=5m

Makefile

@@ -26,3 +26,6 @@ test:
 
 fasttest:
 	go test --tags skip_slow_test -v ./...
+
+lint:
+	golangci-lint run

README.md

@@ -308,6 +308,7 @@ and `{}` for a mutually exclusive keyword.
 | Set type query parameter | `SET PARAM <name> <type>;`                                                                        | |
 | Set value query parameter | `SET PARAM <name> = <value>;`                                                                        | |
 | Show variables | `SHOW PARAMS;`                                                                              | |
+| Show DDLs | `SHOW DDLS;`                                                                              | |
 
 
 ## Customize prompt

statement.go

@@ -170,6 +170,7 @@ var (
 	mutateRe              = regexp.MustCompile(`(?is)MUTATE\s+(\S+)\s+(INSERT|UPDATE|INSERT_OR_UPDATE|REPLACE|DELETE)\s+(.+)$`)
 	showQueryProfilesRe   = regexp.MustCompile(`(?is)^SHOW\s+QUERY\s+PROFILES$`)
 	showQueryProfileRe    = regexp.MustCompile(`(?is)^SHOW\s+QUERY\s+PROFILE\s+(.*)$`)
+	showDdlsRe            = regexp.MustCompile(`(?is)^SHOW\s+DDLS$`)
 )
 
 var (
@@ -300,6 +301,8 @@ func BuildCLIStatement(trimmed string) (Statement, error) {
 			return nil, err
 		}
 		return &ShowQueryProfileStatement{Fprint: fprint}, nil
+	case showDdlsRe.MatchString(trimmed):
+		return &ShowDdlsStatement{}, nil
 	default:
 		return nil, errStatementNotMatched
 	}
@@ -1415,6 +1418,26 @@ ORDER BY INTERVAL_END DESC`,
 	return result, nil
 }
 
+type ShowDdlsStatement struct{}
+
+func (s *ShowDdlsStatement) Execute(ctx context.Context, session *Session) (*Result, error) {
+	resp, err := session.adminClient.GetDatabaseDdl(ctx, &adminpb.GetDatabaseDdlRequest{
+		Database: session.DatabasePath(),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return &Result{
+		KeepVariables: true,
+		// intentionally empty column name to make TAB format valid DDL
+		ColumnNames: sliceOf(""),
+		Rows: sliceOf(toRow(hiter.StringsCollect(0, xiter.Map(
+			func(s string) string { return s + ";\n" },
+			slices.Values(resp.GetStatements()))))),
+	}, nil
+}
+
 type NopStatement struct{}
 
 func (s *NopStatement) Execute(ctx context.Context, session *Session) (*Result, error) {

statement_test.go

@@ -632,6 +632,11 @@ func TestBuildStatement(t *testing.T) {
 			input: `SHOW PARAMS`,
 			want:  &ShowParamsStatement{},
 		},
+		{
+			desc:  "SHOW DDLS statement",
+			input: `SHOW DDLS`,
+			want:  &ShowDdlsStatement{},
+		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
 			got, err := BuildStatement(test.input)