Fall back to raw SQL for DEFERRABLE constraints

Deferrable constraints can't be represented by `pgroll` operations, so
fall back to raw SQL for them.

pkg/sql2pgroll/create_table.go

@@ -139,12 +139,28 @@ func convertColumnDef(tableName string, col *pgq.ColumnDef) (*migrations.Column,
 			if foreignKey == nil {
 				return nil, nil
 			}
+		case pgq.ConstrType_CONSTR_ATTR_NOT_DEFERRABLE:
+			// NOT DEFERRABLE constraints are the default and are supported, but no
+			// extra annotation is needed
+			continue
 		case pgq.ConstrType_CONSTR_GENERATED:
 			// Generated columns are not supported
 			return nil, nil
 		case pgq.ConstrType_CONSTR_IDENTITY:
 			// Identity columns are not supported
 			return nil, nil
+		case pgq.ConstrType_CONSTR_ATTR_DEFERRABLE:
+			// Deferrable constraints are not supported
+			return nil, nil
+		case pgq.ConstrType_CONSTR_ATTR_IMMEDIATE:
+			// Initially immediate deferred constraints are not supported
+			return nil, nil
+		case pgq.ConstrType_CONSTR_ATTR_DEFERRED:
+			// Initially deferred deferred constraints are not supported
+			return nil, nil
+		default:
+			// Any other type of constraint is not supported
+			return nil, nil
 		}
 	}
 

pkg/sql2pgroll/create_table_test.go

@@ -235,6 +235,17 @@ func TestUnconvertableCreateTableStatements(t *testing.T) {
 		// Generated columns are not supported
 		"CREATE TABLE foo(a int GENERATED ALWAYS AS (1) STORED)",
 		"CREATE TABLE foo(a int GENERATED ALWAYS AS IDENTITY)",
+
+		// Deferrable constraints are not supported
+		"CREATE TABLE foo(a int UNIQUE DEFERRABLE)",
+		"CREATE TABLE foo(a int PRIMARY KEY DEFERRABLE)",
+		"CREATE TABLE foo(a int REFERENCES bar(b) DEFERRABLE)",
+		"CREATE TABLE foo(a int UNIQUE DEFERRABLE INITIALLY IMMEDIATE)",
+		"CREATE TABLE foo(a int PRIMARY KEY DEFERRABLE INITIALLY IMMEDIATE)",
+		"CREATE TABLE foo(a int REFERENCES bar(b) DEFERRABLE INITIALLY IMMEDIATE)",
+		"CREATE TABLE foo(a int UNIQUE DEFERRABLE INITIALLY DEFERRED)",
+		"CREATE TABLE foo(a int PRIMARY KEY DEFERRABLE INITIALLY DEFERRED)",
+		"CREATE TABLE foo(a int REFERENCES bar(b) DEFERRABLE INITIALLY DEFERRED)",
 	}
 
 	for _, sql := range tests {