update GetSchemataAll to use SchemataLevelColumn and add corresponding test

Author: flarco

core/dbio/database/schemata.go

@@ -999,7 +999,7 @@ func GetSchemataAll(conn Connection) (schemata Schemata, err error) {
 		}
 
 		// pull down schemata
-		newSchemata, err := newConn.GetSchemata("", "")
+		newSchemata, err := newConn.GetSchemata(SchemataLevelColumn, "")
 		if err != nil {
 			g.Warn("could not obtain schemata for database: %s. %s", dbName, err)
 			return

core/dbio/database/schemata_test.go

@@ -6,6 +6,8 @@ import (
 
 	"github.com/flarco/g"
 	"github.com/slingdata-io/sling-cli/core/dbio"
+	"github.com/slingdata-io/sling-cli/core/env"
+	"github.com/spf13/cast"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -297,6 +299,34 @@ func TestParseSQLMultiStatements(t *testing.T) {
 	}
 }
 
+func TestGetSchemataAll(t *testing.T) {
+	ef := env.LoadSlingEnvFile()
+
+	url := cast.ToStringMap(ef.Connections["POSTGRES"])["url"]
+	if url == nil {
+		t.Skip("POSTGRES env var not set")
+	}
+
+	conn, err := NewConn(cast.ToString(url))
+	if !assert.NoError(t, err) {
+		return
+	}
+	defer conn.Close()
+
+	schemata, err := GetSchemataAll(conn)
+	if !assert.NoError(t, err) {
+		return
+	}
+
+	// Count all tables from all databases
+	tableCount := 0
+	for _, db := range schemata.Databases {
+		tableCount += len(db.Tables())
+	}
+
+	assert.Greater(t, tableCount, 0, "expected at least one table across all databases")
+}
+
 func TestTrimSQLComments(t *testing.T) {
 	type testCase struct {
 		name     string