feat: Redshift MATH functions

Signed-off-by: Andreas Reichel <andreas@manticore-projects.com>

src/main/java/ai/starlake/transpiler/redshift/RedshiftExpressionTranspiler.java

@@ -65,6 +65,8 @@ enum TranspiledFunction {
 
     , ARRAY, ARRAY_FLATTEN, GET_ARRAY_LENGTH, SPLIT_TO_ARRAY, SUBARRAY
 
+    , DEXP, DLOG1, DLOG10, LOG
+
     , TRUNC
 
     , TO_CHAR
@@ -519,6 +521,16 @@ public void visit(Function function) {
         case SUBARRAY:
           function.setName("list_slice");
           break;
+        case DEXP:
+          function.setName("Exp$$");
+          break;
+        case DLOG1:
+          function.setName("Ln$$");
+          break;
+        case DLOG10:
+        case LOG:
+          function.setName("Log$$");
+          break;
       }
     }
     if (rewrittenExpression == null) {

src/test/resources/ai/starlake/transpiler/redshift/disabled.sql

@@ -1,3 +1,11 @@
+-- provided
+SELECT commission, TRUNC(commission) AS trunc
+FROM sales WHERE salesid=784;
+
+-- result
+"commission","trunc"
+"111.15","111"
+
 -- provided
 select format('{:CC}', DATE '2023-12-31') century;
 

src/test/resources/ai/starlake/transpiler/redshift/math_function.sql

@@ -0,0 +1,252 @@
+-- provided
+SELECT ABS(14-76) as abs;
+
+-- result
+"abs"
+"62"
+
+
+-- provided
+SELECT (ACOS(.5) * 180/(SELECT PI())) AS degrees;
+
+-- result
+"degrees"
+"60.00000000000001"
+
+
+-- provided
+SELECT (ASIN(.5) * 180/(SELECT PI())) AS degrees;
+
+-- result
+"degrees"
+"30.000000000000004"
+
+
+-- provided
+SELECT (ATAN(1) * 180/(SELECT PI())) AS degrees;
+
+-- result
+"degrees"
+"45.0"
+
+
+-- provided
+SELECT (ATAN2(1,0) * 180/(SELECT PI())) AS degrees;
+
+-- result
+"degrees"
+"90.0"
+
+
+-- provided
+SELECT CBRT(commission) AS cbrt FROM sales WHERE salesid=10000;
+
+
+-- result
+"cbrt"
+"3.0383953904884344"
+
+
+-- provided
+SELECT CEILING(commission) AS ceil FROM sales
+WHERE salesid=10000;
+
+-- result
+"ceil"
+"29"
+
+
+-- provided
+SELECT COS(PI()) AS cos;
+
+-- result
+"cos"
+"-1.0"
+
+
+-- provided
+SELECT COT(1) AS cot;
+
+-- result
+"cot"
+"0.6420926159343306"
+
+
+-- provided
+SELECT DEGREES(pi()) AS degrees;
+
+-- result
+"degrees"
+"180.0"
+
+
+-- provided
+SELECT (SELECT SUM(qtysold)
+FROM sales, date
+WHERE sales.dateid=date.dateid
+AND year=2008) * DEXP((7::FLOAT/100)*10) qty2010;
+
+-- expected
+SELECT (SELECT SUM(qtysold)
+FROM sales, date
+WHERE sales.dateid=date.dateid
+AND year=2008) * EXP((7::FLOAT/100)*10) qty2010;
+
+-- result
+"qty2010"
+"695447.4754818415"
+
+
+-- provided
+SELECT DLOG1(2.718281828) AS ln;
+
+-- expected
+SELECT LN(2.718281828) AS ln;
+
+-- result
+"ln"
+"0.9999999998311266"
+
+
+-- provided
+SELECT DLOG10(100) as log;
+
+-- expected
+SELECT LOG(100) as log;
+
+-- result
+"log"
+"2.0"
+
+
+-- provided
+SELECT (SELECT SUM(qtysold)
+FROM sales, date
+WHERE sales.dateid=date.dateid
+AND year=2008) * EXP((7::FLOAT/100)*10) qty2018;
+
+
+-- result
+"qty2018"
+"695447.4754818415"
+
+
+-- provided
+SELECT commission, FLOOR(commission)  AS floor
+FROM sales
+WHERE salesid=10000;
+
+-- result
+"commission","floor"
+"28.05","28"
+
+
+-- provided
+SELECT LN(2.718281828) AS ln;
+
+-- result
+"ln"
+"0.9999999998311266"
+
+
+-- provided
+SELECT LOG(2, 100) AS log;
+
+-- result
+"log"
+"6.643856189774724"
+
+
+-- provided
+SELECT MOD(10.5, 4) AS mod;
+
+-- result
+"mod"
+"2.5"
+
+
+-- provided
+SELECT PI() AS pi;
+
+-- result
+"pi"
+"3.141592653589793"
+
+
+-- provided
+SELECT (SELECT SUM(qtysold) FROM sales, date
+WHERE sales.dateid=date.dateid
+AND year=2008) * POW((1+7::DOUBLE PRECISION/100/12),120) qty2010;
+
+-- result
+"qty2010"
+"694034.54678046"
+
+
+-- provided
+SELECT RADIANS(180) AS pi;
+
+-- result
+"pi"
+"3.141592653589793"
+
+
+-- provided
+SELECT CAST(RANDOM() * 100 AS INT);
+
+-- count
+1
+
+
+-- provided
+SELECT commission, ROUND(commission, 1) AS rounded
+FROM sales WHERE salesid=10000;
+
+-- result
+"commission","rounded"
+"28.05","28.1"
+
+
+-- provided
+SELECT commission, ROUND(commission, -1)  AS rounded
+FROM sales WHERE salesid=10000;
+
+-- result
+"commission","rounded"
+"28.05","30"
+
+
+-- provided
+SELECT SIN(-PI()) AS sin;
+
+-- result
+"sin"
+"-1.2246467991473532E-16"
+
+
+-- provided
+SELECT commission, SIGN(commission) AS sign
+FROM sales WHERE salesid=10000;
+
+-- result
+"commission","sign"
+"28.05","1"
+
+
+-- provided
+SELECT SQRT('16') AS sqrt;
+
+-- result
+"sqrt"
+"4.0"
+
+
+-- provided
+SELECT TAN(0) AS tan;
+
+-- result
+"tan"
+"0.0"
+
+
+