com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast Class Reference

Inheritance diagram for com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast:

Collaboration diagram for com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast:

Public Member Functions
	TryCast ()
RelDataType	inferReturnType (SqlOperatorBinding opBinding)
String	getSignatureTemplate (final int operandsCount)
SqlOperandCountRange	getOperandCountRange ()
boolean	checkOperandTypes (SqlCallBinding callBinding, boolean throwOnFailure)
SqlSyntax	getSyntax ()
void	unparse (SqlWriter writer, SqlCall call, int leftPrec, int rightPrec)

Detailed Description

Definition at line 1300 of file HeavyDBSqlOperatorTable.java.

Constructor & Destructor Documentation

com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.TryCast ( )

inline

Definition at line 1303 of file HeavyDBSqlOperatorTable.java.

                     {
      super("TRY_CAST",
              SqlKind.OTHER_FUNCTION,
              null,
              InferTypes.FIRST_KNOWN,
              null,
              SqlFunctionCategory.SYSTEM);
    }

Member Function Documentation

boolean com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.checkOperandTypes ( SqlCallBinding  callBinding, boolean  throwOnFailure  )

inline

Makes sure that the number and types of arguments are allowable. Operators (such as "ROW" and "AS") which do not check their arguments can override this method.

Definition at line 1351 of file HeavyDBSqlOperatorTable.java.

                                                                                         {
      final SqlNode left = callBinding.operand(0);
      final SqlNode right = callBinding.operand(1);
      if (SqlUtil.isNullLiteral(left, false) || left instanceof SqlDynamicParam) {
        return true;
      }
      RelDataType validatedNodeType =
              callBinding.getValidator().getValidatedNodeType(left);
      RelDataType returnType =
              callBinding.getValidator().deriveType(callBinding.getScope(), right);
      if (!SqlTypeUtil.canCastFrom(returnType, validatedNodeType, true)) {
        if (throwOnFailure) {
          throw callBinding.newError(RESOURCE.cannotCastValue(
                  validatedNodeType.toString(), returnType.toString()));
        }
        return false;
      }
      if (SqlTypeUtil.areCharacterSetsMismatched(validatedNodeType, returnType)) {
        if (throwOnFailure) {
          // Include full type string to indicate character
          // set mismatch.
          throw callBinding.newError(RESOURCE.cannotCastValue(
                  validatedNodeType.getFullTypeString(), returnType.getFullTypeString()));
        }
        return false;
      }
      return true;
    }

SqlOperandCountRange com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.getOperandCountRange ( )

inline

Definition at line 1342 of file HeavyDBSqlOperatorTable.java.

                                                       {
      return SqlOperandCountRanges.of(2);
    }

String com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.getSignatureTemplate ( final int  operandsCount )

inline

Definition at line 1337 of file HeavyDBSqlOperatorTable.java.

                                                                {
      assert operandsCount == 2;
      return "{0}({1} AS {2})";
    }

SqlSyntax com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.getSyntax ( )

inline

Definition at line 1380 of file HeavyDBSqlOperatorTable.java.

                                 {
      return SqlSyntax.FUNCTION;
    }

RelDataType com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.inferReturnType ( SqlOperatorBinding  opBinding )

inline

Definition at line 1314 of file HeavyDBSqlOperatorTable.java.

                                                                     {
      assert opBinding.getOperandCount() == 2;
      RelDataType ret = opBinding.getOperandType(1);
      RelDataType firstType = opBinding.getOperandType(0);
      ret = opBinding.getTypeFactory().createTypeWithNullability(
              ret, firstType.isNullable());
      if (opBinding instanceof SqlCallBinding) {
        SqlCallBinding callBinding = (SqlCallBinding) opBinding;
        SqlNode operand0 = callBinding.operand(0);

        // dynamic parameters and null constants need their types assigned
        // to them using the type they are casted to.
        if (((operand0 instanceof SqlLiteral)
                    && (((SqlLiteral) operand0).getValue() == null))
                || (operand0 instanceof SqlDynamicParam)) {
          final SqlValidatorImpl validator =
                  (SqlValidatorImpl) callBinding.getValidator();
          validator.setValidatedNodeType(operand0, ret);
        }
      }
      return ret;
    }

void com.mapd.calcite.parser.HeavyDBSqlOperatorTable.TryCast.unparse ( SqlWriter  writer, SqlCall  call, int  leftPrec, int  rightPrec  )

inline

Definition at line 1384 of file HeavyDBSqlOperatorTable.java.

                                                                                     {
      assert call.operandCount() == 2;
      final SqlWriter.Frame frame = writer.startFunCall(getName());
      call.operand(0).unparse(writer, 0, 0);
      writer.sep("AS");
      if (call.operand(1) instanceof SqlIntervalQualifier) {
        writer.sep("INTERVAL");
      }
      call.operand(1).unparse(writer, 0, 0);
      writer.endFunCall(frame);
    }

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The documentation for this class was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/java/calcite/src/main/java/com/mapd/calcite/parser/HeavyDBSqlOperatorTable.java