fix(postgres): render dates, times, timestamps and none literals corr…

…ectly

ibis/backends/postgres/registry.py

@@ -396,6 +396,10 @@ def _literal(t, op):
     dtype = op.dtype
     value = op.value
 
+    if value is None:
+        return (
+            sa.null() if dtype.is_null() else sa.cast(sa.null(), t.get_sqla_type(dtype))
+        )
     if dtype.is_interval():
         return sa.literal_column(f"INTERVAL '{value} {dtype.resolution}'")
     elif dtype.is_geospatial():
@@ -405,6 +409,16 @@ def _literal(t, op):
         return pg.array(value)
     elif dtype.is_map():
         return pg.hstore(list(value.keys()), list(value.values()))
+    elif dtype.is_time():
+        return sa.func.make_time(
+            value.hour, value.minute, value.second + value.microsecond / 1e6
+        )
+    elif dtype.is_date():
+        return sa.func.make_date(value.year, value.month, value.day)
+    elif dtype.is_timestamp():
+        if (tz := dtype.timezone) is not None:
+            return sa.func.to_timestamp(value.timestamp()).op("AT TIME ZONE")(tz)
+        return sa.cast(sa.literal(value.isoformat()), sa.TIMESTAMP())
     else:
         return sa.literal(value)
 

ibis/backends/tests/snapshots/test_temporal/test_temporal_literal_sql/duckdb-timestamp/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  CAST('2023-04-07T04:05:06.230136' AS TIMESTAMP) AS "datetime.datetime(2023, 4, 7, 4, 5, 6, 230136)"

ibis/backends/tests/snapshots/test_temporal/test_temporal_literal_sql/oracle-date/out.sql

@@ -0,0 +1,3 @@
+SELECT
+  TO_DATE('2023-04-07', 'FXYYYY-MM-DD') AS "datetime.date(2023, 4, 7)"
+FROM DUAL

ibis/backends/tests/snapshots/test_temporal/test_temporal_literal_sql/oracle-timestamp/out.sql

@@ -0,0 +1,3 @@
+SELECT
+  TO_TIMESTAMP('2023-04-07,04:05:06.230136', 'FXYYYY-MM-DD,HH24:MI:SS.FF6') AS "datetime.datetime(2023, 4, 7, 4, 5, 6, 230136)"
+FROM DUAL

ibis/backends/tests/snapshots/test_temporal/test_temporal_literal_sql/postgres-date/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKE_DATE(2023, 4, 7) AS "datetime.date(2023, 4, 7)"

ibis/backends/tests/snapshots/test_temporal/test_temporal_literal_sql/postgres-timestamp/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  CAST('2023-04-07T04:05:06.230136' AS TIMESTAMP) AS "datetime.datetime(2023, 4, 7, 4, 5, 6, 230136)"

ibis/backends/tests/snapshots/test_temporal/test_time_literal_sql/0-postgres/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKE_TIME(4, 5, 6.0) AS "datetime.time(4, 5, 6)"

ibis/backends/tests/snapshots/test_temporal/test_time_literal_sql/234567-postgres/out.sql

@@ -0,0 +1,2 @@
+SELECT
+  MAKE_TIME(4, 5, 6.234567) AS "datetime.time(4, 5, 6, 234567)"

ibis/backends/tests/test_temporal.py

@@ -2958,7 +2958,7 @@ def test_timestamp_bucket_offset(backend, offset_mins):
         *no_sqlglot_dialect,
     ],
 )
-def test_temporal_literals(value, dialect, snapshot):
+def test_temporal_literal_sql(value, dialect, snapshot):
     expr = ibis.literal(value)
     sql = ibis.to_sql(expr, dialect=dialect)
     snapshot.assert_match(sql, "out.sql")
@@ -2995,7 +2995,7 @@ def test_temporal_literals(value, dialect, snapshot):
     ],
 )
 @pytest.mark.parametrize("micros", [0, 234567])
-def test_time_literals(dialect, snapshot, micros):
+def test_time_literal_sql(dialect, snapshot, micros):
     value = datetime.time(4, 5, 6, microsecond=micros)
     expr = ibis.literal(value)
     sql = ibis.to_sql(expr, dialect=dialect)

ibis/backends/tests/tpch/snapshots/test_h01/test_tpc_h01/duckdb/h01.sql

@@ -31,7 +31,7 @@ FROM (
     COUNT(*) AS count_order
   FROM main.lineitem AS t1
   WHERE
-    t1.l_shipdate <= CAST('1998-09-02' AS DATE)
+    t1.l_shipdate <= MAKE_DATE(1998, 9, 2)
   GROUP BY
     1,
     2

ibis/backends/tests/tpch/snapshots/test_h03/test_tpc_h03/duckdb/h03.sql

@@ -13,8 +13,8 @@ WITH t0 AS (
     ON t4.l_orderkey = t3.o_orderkey
   WHERE
     t2.c_mktsegment = 'BUILDING'
-    AND t3.o_orderdate < CAST('1995-03-15' AS DATE)
-    AND t4.l_shipdate > CAST('1995-03-15' AS DATE)
+    AND t3.o_orderdate < MAKE_DATE(1995, 3, 15)
+    AND t4.l_shipdate > MAKE_DATE(1995, 3, 15)
   GROUP BY
     1,
     2,

ibis/backends/tests/tpch/snapshots/test_h04/test_tpc_h04/duckdb/h04.sql

@@ -12,8 +12,8 @@ WHERE
         t1.l_orderkey = t0.o_orderkey AND t1.l_commitdate < t1.l_receiptdate
     )
   )
-  AND t0.o_orderdate >= CAST('1993-07-01' AS DATE)
-  AND t0.o_orderdate < CAST('1993-10-01' AS DATE)
+  AND t0.o_orderdate >= MAKE_DATE(1993, 7, 1)
+  AND t0.o_orderdate < MAKE_DATE(1993, 10, 1)
 GROUP BY
   1
 ORDER BY

ibis/backends/tests/tpch/snapshots/test_h05/test_tpc_h05/duckdb/h05.sql

@@ -20,8 +20,8 @@ FROM (
     ON t5.n_regionkey = t6.r_regionkey
   WHERE
     t6.r_name = 'ASIA'
-    AND t2.o_orderdate >= CAST('1994-01-01' AS DATE)
-    AND t2.o_orderdate < CAST('1995-01-01' AS DATE)
+    AND t2.o_orderdate >= MAKE_DATE(1994, 1, 1)
+    AND t2.o_orderdate < MAKE_DATE(1995, 1, 1)
   GROUP BY
     1
 ) AS t0

ibis/backends/tests/tpch/snapshots/test_h06/test_tpc_h06/duckdb/h06.sql

@@ -2,7 +2,7 @@ SELECT
   SUM(t0.l_extendedprice * t0.l_discount) AS revenue
 FROM main.lineitem AS t0
 WHERE
-  t0.l_shipdate >= CAST('1994-01-01' AS DATE)
-  AND t0.l_shipdate < CAST('1995-01-01' AS DATE)
+  t0.l_shipdate >= MAKE_DATE(1994, 1, 1)
+  AND t0.l_shipdate < MAKE_DATE(1995, 1, 1)
   AND t0.l_discount BETWEEN CAST(0.05 AS REAL(53)) AND CAST(0.07 AS REAL(53))
   AND t0.l_quantity < CAST(24 AS TINYINT)

ibis/backends/tests/tpch/snapshots/test_h07/test_tpc_h07/duckdb/h07.sql

@@ -39,7 +39,7 @@ FROM (
       OR t0.cust_nation = 'GERMANY'
       AND t0.supp_nation = 'FRANCE'
     )
-    AND t0.l_shipdate BETWEEN CAST('1995-01-01' AS DATE) AND CAST('1996-12-31' AS DATE)
+    AND t0.l_shipdate BETWEEN MAKE_DATE(1995, 1, 1) AND MAKE_DATE(1996, 12, 31)
   GROUP BY
     1,
     2,

ibis/backends/tests/tpch/snapshots/test_h08/test_tpc_h08/duckdb/h08.sql

@@ -34,7 +34,7 @@ WITH t0 AS (
   FROM t0
   WHERE
     t0.r_name = 'AMERICA'
-    AND t0.o_orderdate BETWEEN CAST('1995-01-01' AS DATE) AND CAST('1996-12-31' AS DATE)
+    AND t0.o_orderdate BETWEEN MAKE_DATE(1995, 1, 1) AND MAKE_DATE(1996, 12, 31)
     AND t0.p_type = 'ECONOMY ANODIZED STEEL'
 ), t2 AS (
   SELECT

ibis/backends/tests/tpch/snapshots/test_h10/test_tpc_h10/duckdb/h10.sql

@@ -18,8 +18,8 @@ WITH t0 AS (
   JOIN main.nation AS t5
     ON t2.c_nationkey = t5.n_nationkey
   WHERE
-    t3.o_orderdate >= CAST('1993-10-01' AS DATE)
-    AND t3.o_orderdate < CAST('1994-01-01' AS DATE)
+    t3.o_orderdate >= MAKE_DATE(1993, 10, 1)
+    AND t3.o_orderdate < MAKE_DATE(1994, 1, 1)
     AND t4.l_returnflag = 'R'
   GROUP BY
     1,

ibis/backends/tests/tpch/snapshots/test_h12/test_tpc_h12/duckdb/h12.sql

@@ -30,8 +30,8 @@ FROM (
     t2.l_shipmode IN ('MAIL', 'SHIP')
     AND t2.l_commitdate < t2.l_receiptdate
     AND t2.l_shipdate < t2.l_commitdate
-    AND t2.l_receiptdate >= CAST('1994-01-01' AS DATE)
-    AND t2.l_receiptdate < CAST('1995-01-01' AS DATE)
+    AND t2.l_receiptdate >= MAKE_DATE(1994, 1, 1)
+    AND t2.l_receiptdate < MAKE_DATE(1995, 1, 1)
   GROUP BY
     1
 ) AS t0

ibis/backends/tests/tpch/snapshots/test_h14/test_tpc_h14/duckdb/h14.sql

@@ -18,5 +18,4 @@ FROM main.lineitem AS t0
 JOIN main.part AS t1
   ON t0.l_partkey = t1.p_partkey
 WHERE
-  t0.l_shipdate >= CAST('1995-09-01' AS DATE)
-  AND t0.l_shipdate < CAST('1995-10-01' AS DATE)
+  t0.l_shipdate >= MAKE_DATE(1995, 9, 1) AND t0.l_shipdate < MAKE_DATE(1995, 10, 1)

ibis/backends/tests/tpch/snapshots/test_h15/test_tpc_h15/duckdb/h15.sql

@@ -6,8 +6,7 @@ WITH t0 AS (
     )) AS total_revenue
   FROM main.lineitem AS t3
   WHERE
-    t3.l_shipdate >= CAST('1996-01-01' AS DATE)
-    AND t3.l_shipdate < CAST('1996-04-01' AS DATE)
+    t3.l_shipdate >= MAKE_DATE(1996, 1, 1) AND t3.l_shipdate < MAKE_DATE(1996, 4, 1)
   GROUP BY
     1
 ), t1 AS (

ibis/backends/tests/tpch/snapshots/test_h20/test_tpc_h20/duckdb/h20.sql

@@ -54,8 +54,8 @@ WITH t0 AS (
             WHERE
               t6.l_partkey = t5.ps_partkey
               AND t6.l_suppkey = t5.ps_suppkey
-              AND t6.l_shipdate >= CAST('1994-01-01' AS DATE)
-              AND t6.l_shipdate < CAST('1995-01-01' AS DATE)
+              AND t6.l_shipdate >= MAKE_DATE(1994, 1, 1)
+              AND t6.l_shipdate < MAKE_DATE(1995, 1, 1)
           ) * CAST(0.5 AS REAL(53))
       ) AS t4
     )