Modernize Python exception syntax in tests

Change the exception syntax used in the tests to use the more current

    except Exception as ex:

rather than the old

    except Exception, ex:

Since support for Python <2.6 has been removed, all supported versions
now support the new style, and we can save one step in the Python 3
compatibility conversion.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/98b69261-298c-13d2-f34d-836fd9c29b21%402ndquadrant.com

src/pl/plpython/expected/plpython_ereport.out

@@ -186,7 +186,7 @@ DETAIL:  message:(plpy.Error: message text), detail:(detail text), hint: (hint t
 DO $$
 try:
     plpy.execute("select raise_exception(_message => 'my message', _sqlstate => 'XX987', _hint => 'some hint', _table_name => 'users_tab', _datatype_name => 'user_type')")
-except Exception, e:
+except Exception as e:
     plpy.info(e.spidata)
     raise e
 $$ LANGUAGE plpythonu;
@@ -196,7 +196,7 @@ HINT:  some hint
 DO $$
 try:
     plpy.error(message  = 'my message', sqlstate = 'XX987', hint = 'some hint', table_name = 'users_tab', datatype_name = 'user_type')
-except Exception, e:
+except Exception as e:
     plpy.info('sqlstate: %s, hint: %s, table_name: %s, datatype_name: %s' % (e.sqlstate, e.hint, e.table_name, e.datatype_name))
     raise e
 $$ LANGUAGE plpythonu;

src/pl/plpython/expected/plpython_error.out

@@ -97,7 +97,7 @@ CREATE FUNCTION invalid_type_caught(a text) RETURNS text
 	q = "SELECT fname FROM users WHERE lname = $1"
 	try:
 		SD["plan"] = plpy.prepare(q, [ "test" ])
-	except plpy.SPIError, ex:
+	except plpy.SPIError as ex:
 		plpy.notice(str(ex))
 		return None
 rv = plpy.execute(SD["plan"], [ a ])
@@ -122,7 +122,7 @@ CREATE FUNCTION invalid_type_reraised(a text) RETURNS text
 	q = "SELECT fname FROM users WHERE lname = $1"
 	try:
 		SD["plan"] = plpy.prepare(q, [ "test" ])
-	except plpy.SPIError, ex:
+	except plpy.SPIError as ex:
 		plpy.error(str(ex))
 rv = plpy.execute(SD["plan"], [ a ])
 if len(rv):
@@ -321,9 +321,9 @@ $$
 from plpy import spiexceptions
 try:
     plpy.execute("insert into specific values (%s)" % (i or "NULL"));
-except spiexceptions.NotNullViolation, e:
+except spiexceptions.NotNullViolation as e:
     plpy.notice("Violated the NOT NULL constraint, sqlstate %s" % e.sqlstate)
-except spiexceptions.UniqueViolation, e:
+except spiexceptions.UniqueViolation as e:
     plpy.notice("Violated the UNIQUE constraint, sqlstate %s" % e.sqlstate)
 $$ LANGUAGE plpythonu;
 SELECT specific_exception(2);

src/pl/plpython/expected/plpython_import.out

@@ -21,7 +21,7 @@ CREATE FUNCTION import_succeed() returns text
   import re
   import string
   import time
-except Exception, ex:
+except Exception as ex:
 	plpy.notice("import failed -- %s" % str(ex))
 	return "failed, that wasn''t supposed to happen"
 return "succeeded, as expected"'

src/pl/plpython/expected/plpython_params.out

@@ -25,7 +25,7 @@ CREATE FUNCTION test_param_names3(a0 integer) RETURNS boolean AS $$
 try:
 	assert a1 == args[0]
 	return False
-except NameError, e:
+except NameError as e:
 	assert e.args[0].find("a1") > -1
 	return True
 $$ LANGUAGE plpythonu;

src/pl/plpython/expected/plpython_spi.out

@@ -26,7 +26,7 @@ CREATE FUNCTION spi_prepared_plan_test_one(a text) RETURNS text
 try:
 	rv = plpy.execute(SD["myplan"], [a])
 	return "there are " + str(rv[0]["count"]) + " " + str(a) + "s"
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '
@@ -39,7 +39,7 @@ CREATE FUNCTION spi_prepared_plan_test_two(a text) RETURNS text
 try:
 	rv = SD["myplan"].execute([a])
 	return "there are " + str(rv[0]["count"]) + " " + str(a) + "s"
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '
@@ -53,7 +53,7 @@ try:
 	rv = plpy.execute(SD["myplan"])
 	if len(rv):
 		return rv[0]["count"]
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '

src/pl/plpython/expected/plpython_subtransaction.out

@@ -66,7 +66,7 @@ with plpy.subtransaction():
         with plpy.subtransaction():
             plpy.execute("INSERT INTO subtransaction_tbl VALUES (3)")
             plpy.execute("error")
-    except plpy.SPIError, e:
+    except plpy.SPIError as e:
         if not swallow:
             raise
         plpy.notice("Swallowed %s(%r)" % (e.__class__.__name__, e.args[0]))

src/pl/plpython/expected/plpython_types.out

@@ -400,7 +400,7 @@ CREATE FUNCTION test_type_unmarshal(x bytea) RETURNS text AS $$
 import marshal
 try:
     return marshal.loads(x)
-except ValueError, e:
+except ValueError as e:
     return 'FAILED: ' + str(e)
 $$ LANGUAGE plpythonu;
 SELECT test_type_unmarshal(x) FROM test_type_marshal() x;

src/pl/plpython/regress-python3-mangle.mk

@@ -14,7 +14,7 @@ REGRESS := $(foreach test,$(REGRESS),$(if $(filter $(test),$(REGRESS_PLPYTHON3_M
 pgregress-python3-mangle:
 	$(MKDIR_P) sql/python3 expected/python3 results/python3
 	for file in $(patsubst %,$(srcdir)/sql/%.sql,$(REGRESS_PLPYTHON3_MANGLE)) $(patsubst %,$(srcdir)/expected/%*.out,$(REGRESS_PLPYTHON3_MANGLE)); do \
-	  sed -e 's/except \([[:alpha:]][[:alpha:].]*\), *\([[:alpha:]][[:alpha:]]*\):/except \1 as \2:/g' \
+	  sed \
 	      -e "s/<type 'exceptions\.\([[:alpha:]]*\)'>/<class '\1'>/g" \
 	      -e "s/<type 'long'>/<class 'int'>/g" \
 	      -e "s/\([0-9][0-9]*\)L/\1/g" \

src/pl/plpython/sql/plpython_ereport.sql

@@ -125,7 +125,7 @@ $$;
 DO $$
 try:
     plpy.execute("select raise_exception(_message => 'my message', _sqlstate => 'XX987', _hint => 'some hint', _table_name => 'users_tab', _datatype_name => 'user_type')")
-except Exception, e:
+except Exception as e:
     plpy.info(e.spidata)
     raise e
 $$ LANGUAGE plpythonu;
@@ -133,7 +133,7 @@ $$ LANGUAGE plpythonu;
 DO $$
 try:
     plpy.error(message  = 'my message', sqlstate = 'XX987', hint = 'some hint', table_name = 'users_tab', datatype_name = 'user_type')
-except Exception, e:
+except Exception as e:
     plpy.info('sqlstate: %s, hint: %s, table_name: %s, datatype_name: %s' % (e.sqlstate, e.hint, e.table_name, e.datatype_name))
     raise e
 $$ LANGUAGE plpythonu;

src/pl/plpython/sql/plpython_error.sql

@@ -82,7 +82,7 @@ CREATE FUNCTION invalid_type_caught(a text) RETURNS text
 	q = "SELECT fname FROM users WHERE lname = $1"
 	try:
 		SD["plan"] = plpy.prepare(q, [ "test" ])
-	except plpy.SPIError, ex:
+	except plpy.SPIError as ex:
 		plpy.notice(str(ex))
 		return None
 rv = plpy.execute(SD["plan"], [ a ])
@@ -104,7 +104,7 @@ CREATE FUNCTION invalid_type_reraised(a text) RETURNS text
 	q = "SELECT fname FROM users WHERE lname = $1"
 	try:
 		SD["plan"] = plpy.prepare(q, [ "test" ])
-	except plpy.SPIError, ex:
+	except plpy.SPIError as ex:
 		plpy.error(str(ex))
 rv = plpy.execute(SD["plan"], [ a ])
 if len(rv):
@@ -247,9 +247,9 @@ $$
 from plpy import spiexceptions
 try:
     plpy.execute("insert into specific values (%s)" % (i or "NULL"));
-except spiexceptions.NotNullViolation, e:
+except spiexceptions.NotNullViolation as e:
     plpy.notice("Violated the NOT NULL constraint, sqlstate %s" % e.sqlstate)
-except spiexceptions.UniqueViolation, e:
+except spiexceptions.UniqueViolation as e:
     plpy.notice("Violated the UNIQUE constraint, sqlstate %s" % e.sqlstate)
 $$ LANGUAGE plpythonu;
 

src/pl/plpython/sql/plpython_import.sql

@@ -24,7 +24,7 @@ CREATE FUNCTION import_succeed() returns text
   import re
   import string
   import time
-except Exception, ex:
+except Exception as ex:
 	plpy.notice("import failed -- %s" % str(ex))
 	return "failed, that wasn''t supposed to happen"
 return "succeeded, as expected"'

src/pl/plpython/sql/plpython_params.sql

@@ -29,7 +29,7 @@ CREATE FUNCTION test_param_names3(a0 integer) RETURNS boolean AS $$
 try:
 	assert a1 == args[0]
 	return False
-except NameError, e:
+except NameError as e:
 	assert e.args[0].find("a1") > -1
 	return True
 $$ LANGUAGE plpythonu;

src/pl/plpython/sql/plpython_spi.sql

@@ -31,7 +31,7 @@ CREATE FUNCTION spi_prepared_plan_test_one(a text) RETURNS text
 try:
 	rv = plpy.execute(SD["myplan"], [a])
 	return "there are " + str(rv[0]["count"]) + " " + str(a) + "s"
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '
@@ -45,7 +45,7 @@ CREATE FUNCTION spi_prepared_plan_test_two(a text) RETURNS text
 try:
 	rv = SD["myplan"].execute([a])
 	return "there are " + str(rv[0]["count"]) + " " + str(a) + "s"
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '
@@ -60,7 +60,7 @@ try:
 	rv = plpy.execute(SD["myplan"])
 	if len(rv):
 		return rv[0]["count"]
-except Exception, ex:
+except Exception as ex:
 	plpy.error(str(ex))
 return None
 '

src/pl/plpython/sql/plpython_subtransaction.sql

@@ -40,7 +40,7 @@ with plpy.subtransaction():
         with plpy.subtransaction():
             plpy.execute("INSERT INTO subtransaction_tbl VALUES (3)")
             plpy.execute("error")
-    except plpy.SPIError, e:
+    except plpy.SPIError as e:
         if not swallow:
             raise
         plpy.notice("Swallowed %s(%r)" % (e.__class__.__name__, e.args[0]))

src/pl/plpython/sql/plpython_types.sql

@@ -163,7 +163,7 @@ CREATE FUNCTION test_type_unmarshal(x bytea) RETURNS text AS $$
 import marshal
 try:
     return marshal.loads(x)
-except ValueError, e:
+except ValueError as e:
     return 'FAILED: ' + str(e)
 $$ LANGUAGE plpythonu;
 

src/tools/msvc/vcregress.pl

@@ -290,7 +290,6 @@ sub mangle_plpython3
 				close($handle);
 				do
 				{
-					s/except ([[:alpha:]][[:alpha:].]*), *([[:alpha:]][[:alpha:]]*):/except $1 as $2:/g;
 					s/<type 'exceptions\.([[:alpha:]]*)'>/<class '$1'>/g;
 					s/<type 'long'>/<class 'int'>/g;
 					s/([0-9][0-9]*)L/$1/g;