[SPARK-22904][SQL] Add tests for decimal operations and string casts

sql/core/src/test/resources/sql-tests/inputs/typeCoercion/native/decimalArithmeticOperations.sql

@@ -0,0 +1,33 @@
+--
+--   Licensed to the Apache Software Foundation (ASF) under one or more
+--   contributor license agreements.  See the NOTICE file distributed with
+--   this work for additional information regarding copyright ownership.
+--   The ASF licenses this file to You under the Apache License, Version 2.0
+--   (the "License"); you may not use this file except in compliance with
+--   the License.  You may obtain a copy of the License at
+--
+--      http://www.apache.org/licenses/LICENSE-2.0
+--
+--   Unless required by applicable law or agreed to in writing, software
+--   distributed under the License is distributed on an "AS IS" BASIS,
+--   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+--   See the License for the specific language governing permissions and
+--   limitations under the License.
+--
+
+CREATE TEMPORARY VIEW t AS SELECT 1.0 as a, 0.0 as b;
+
+-- division, remainder and pmod by 0 return NULL
+select a / b from t;
+select a % b from t;
+select pmod(a, b) from t;
+
+-- arithmetic operations causing an overflow return NULL
+select (5e36 + 0.1) + 5e36;
+select (-4e36 - 0.1) - 7e36;
+select 12345678901234567890.0 * 12345678901234567890.0;
+select 1e35 / 0.1;
+
+-- arithmetic operations causing a precision loss return NULL
+select 123456789123456789.1234567890 * 1.123456789123456789;
+select 0.001 / 9876543210987654321098765432109876543.2

sql/core/src/test/resources/sql-tests/inputs/typeCoercion/native/stringCastAndExpressions.sql

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+--
+--   Licensed to the Apache Software Foundation (ASF) under one or more
+--   contributor license agreements.  See the NOTICE file distributed with
+--   this work for additional information regarding copyright ownership.
+--   The ASF licenses this file to You under the Apache License, Version 2.0
+--   (the "License"); you may not use this file except in compliance with
+--   the License.  You may obtain a copy of the License at
+--
+--      http://www.apache.org/licenses/LICENSE-2.0
+--
+--   Unless required by applicable law or agreed to in writing, software
+--   distributed under the License is distributed on an "AS IS" BASIS,
+--   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+--   See the License for the specific language governing permissions and
+--   limitations under the License.
+--
+
+CREATE TEMPORARY VIEW t AS SELECT 'aa' as a;
+
+-- casting to data types which are unable to represent the string input returns NULL
+select cast(a as byte) from t;
+select cast(a as short) from t;
+select cast(a as int) from t;
+select cast(a as long) from t;
+select cast(a as float) from t;
+select cast(a as double) from t;
+select cast(a as decimal) from t;
+select cast(a as boolean) from t;
+select cast(a as timestamp) from t;
+select cast(a as date) from t;
+-- casting to binary works correctly
+select cast(a as binary) from t;
+-- casting to array, struct or map throws exception
+select cast(a as array<string>) from t;
+select cast(a as struct<s:string>) from t;
+select cast(a as map<string, string>) from t;
+
+-- all timestamp/date expressions return NULL if bad input strings are provided
+select to_timestamp(a) from t;
+select to_timestamp('2018-01-01', a) from t;
+select to_unix_timestamp(a) from t;
+select to_unix_timestamp('2018-01-01', a) from t;
+select unix_timestamp(a) from t;
+select unix_timestamp('2018-01-01', a) from t;
+select from_unixtime(a) from t;
+select from_unixtime('2018-01-01', a) from t;
+select next_day(a, 'MO') from t;
+select next_day('2018-01-01', a) from t;
+select trunc(a, 'MM') from t;
+select trunc('2018-01-01', a) from t;
+
+-- some functions return NULL if bad input is provided
+select unhex('-123');
+select sha2(a, a) from t;
+select get_json_object(a, a) from t;
+select json_tuple(a, a) from t;
+select from_json(a, 'a INT') from t;

sql/core/src/test/resources/sql-tests/results/typeCoercion/native/decimalArithmeticOperations.sql.out

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+-- Automatically generated by SQLQueryTestSuite
+-- Number of queries: 10
+
+
+-- !query 0
+CREATE TEMPORARY VIEW t AS SELECT 1.0 as a, 0.0 as b
+-- !query 0 schema
+struct<>
+-- !query 0 output
+
+
+
+-- !query 1
+select a / b from t
+-- !query 1 schema
+struct<(CAST(a AS DECIMAL(2,1)) / CAST(b AS DECIMAL(2,1))):decimal(8,6)>
+-- !query 1 output
+NULL
+
+
+-- !query 2
+select a % b from t
+-- !query 2 schema
+struct<(CAST(a AS DECIMAL(2,1)) % CAST(b AS DECIMAL(2,1))):decimal(1,1)>
+-- !query 2 output
+NULL
+
+
+-- !query 3
+select pmod(a, b) from t
+-- !query 3 schema
+struct<pmod(CAST(a AS DECIMAL(2,1)), CAST(b AS DECIMAL(2,1))):decimal(1,1)>
+-- !query 3 output
+NULL
+
+
+-- !query 4
+select (5e36 + 0.1) + 5e36
+-- !query 4 schema
+struct<(CAST((CAST(5E+36 AS DECIMAL(38,1)) + CAST(0.1 AS DECIMAL(38,1))) AS DECIMAL(38,1)) + CAST(5E+36 AS DECIMAL(38,1))):decimal(38,1)>
+-- !query 4 output
+NULL
+
+
+-- !query 5
+select (-4e36 - 0.1) - 7e36
+-- !query 5 schema
+struct<(CAST((CAST(-4E+36 AS DECIMAL(38,1)) - CAST(0.1 AS DECIMAL(38,1))) AS DECIMAL(38,1)) - CAST(7E+36 AS DECIMAL(38,1))):decimal(38,1)>
+-- !query 5 output
+NULL
+
+
+-- !query 6
+select 12345678901234567890.0 * 12345678901234567890.0
+-- !query 6 schema
+struct<(12345678901234567890.0 * 12345678901234567890.0):decimal(38,2)>
+-- !query 6 output
+NULL
+
+
+-- !query 7
+select 1e35 / 0.1
+-- !query 7 schema
+struct<(CAST(1E+35 AS DECIMAL(37,1)) / CAST(0.1 AS DECIMAL(37,1))):decimal(38,3)>
+-- !query 7 output
+NULL
+
+
+-- !query 8
+select 123456789123456789.1234567890 * 1.123456789123456789
+-- !query 8 schema
+struct<(CAST(123456789123456789.1234567890 AS DECIMAL(36,18)) * CAST(1.123456789123456789 AS DECIMAL(36,18))):decimal(38,28)>
+-- !query 8 output
+NULL
+
+
+-- !query 9
+select 0.001 / 9876543210987654321098765432109876543.2
+-- !query 9 schema
+struct<(CAST(0.001 AS DECIMAL(38,3)) / CAST(9876543210987654321098765432109876543.2 AS DECIMAL(38,3))):decimal(38,37)>
+-- !query 9 output
+NULL