add dolt_backups() script tests and bats test

go/libraries/doltcore/sqle/enginetest/dolt_engine_test.go

@@ -1487,6 +1487,12 @@ func TestBackupsSystemTable(t *testing.T) {
 	enginetest.TestScript(t, h, BackupsSystemTableQueries)
 }
 
+func TestBackupsTableFunction(t *testing.T) {
+	h := newDoltHarness(t)
+	defer h.Close()
+	enginetest.TestScript(t, h, BackupsTableFunctionQueries)
+}
+
 func TestHistorySystemTable(t *testing.T) {
 	harness := newDoltEnginetestHarness(t).WithParallelism(2)
 	RunHistorySystemTableTests(t, harness)

go/libraries/doltcore/sqle/enginetest/dolt_system_table_queries.go

@@ -103,3 +103,21 @@ var BackupsSystemTableQueries = queries.ScriptTest{
 		},
 	},
 }
+
+var BackupsTableFunctionQueries = queries.ScriptTest{
+	Name: "dolt_backups() table function",
+	SetUpScript: []string{
+		`call dolt_backup("add", "backup1", "file:///tmp/backup1");`,
+	},
+	Assertions: []queries.ScriptTestAssertion{
+		{
+			Query:    "select name from dolt_backups();",
+			Expected: []sql.Row{{"backup1"}},
+		},
+		{
+			Query:    "select name from dolt_backups() where name = 'backup1';",
+			Expected: []sql.Row{{"backup1"}},
+		},
+		// Table functions are implicitly read-only at the SQL parser level.
+	},
+}

integration-tests/bats/backup.bats

@@ -317,3 +317,19 @@ teardown() {
     run dolt backup sync-url file://../bac1
     [ "$status" -ne 0 ]
 }
+
+@test "backup: dolt_backups() table function with verbose flag" {
+    cd repo1
+    dolt backup add bac1 file://../bac1
+    
+    run dolt sql -q "SELECT name, url FROM dolt_backups()" -r csv
+    [ "$status" -eq 0 ]
+    [[ "${lines[0]}" =~ "name,url" ]] || false
+    [[ "${lines[1]}" =~ "bac1,file://" ]] || false
+    
+    run dolt sql -q "SELECT name, url, params FROM dolt_backups('--verbose')" -r csv
+    [ "$status" -eq 0 ]
+    [[ "${lines[0]}" =~ "name,url,params" ]] || false
+    [[ "${lines[1]}" =~ "bac1,file://" ]] || false
+    [[ "${lines[1]}" =~ "{}" ]] || false
+}