Cast between various data types is throwing warnings

[vrajat]

This may be related #18 . Unit tests throw the following warnings:

Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:42 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
Feb 25, 2016 6:09:43 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: VARCHAR for value of class class java.math.BigDecimal is being handled in default way
18:09:43.021 [main] INFO  com.qubole.quark.planner.Parser -

Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:46 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
Feb 25, 2016 6:09:47 PM org.apache.calcite.util.trace.CalciteLogger warning
WARNING: Support for checking =($65, '14-01-2007') => AND(=(CAST($69):INTEGER, 2007), =(CAST($71):INTEGER, 1), >=($72, 1), <=($72, 25)) is not there
18:09:47.094 [main] INFO  com.qubole.quark.planner.Parser -