Examples of org.teiid.metadata.FunctionParameter

org.teiid.metadata.FunctionParameter
A function parameter defines the name and description of an input or output parameter for a function. The name should not be null, but that is not verified by this class. Validation of this object can be done with the {@link FunctionMetadataValidator}. The type string used in the function parameter should be one of the standard type names defined in {@link org.teiid.core.types.DataTypeManager.DefaultDataTypes}.


  private void addAtan2Function(String name, String description) {
    functions.add(
      new FunctionMethod(name, description, NUMERIC, FUNCTION_CLASS, name,
        new FunctionParameter[] { 
          new FunctionParameter("number1", DataTypeManager.DefaultDataTypes.DOUBLE, QueryPlugin.Util.getString("SystemSource.Atan_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("number2", DataTypeManager.DefaultDataTypes.DOUBLE, QueryPlugin.Util.getString("SystemSource.Atan_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.DOUBLE, description) ) );                 //$NON-NLS-1$
    functions.add(
        new FunctionMethod(name, description, NUMERIC, FUNCTION_CLASS, name,
          new FunctionParameter[] { 
            new FunctionParameter("number1", DataTypeManager.DefaultDataTypes.BIG_DECIMAL, QueryPlugin.Util.getString("SystemSource.Atan_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
            new FunctionParameter("number2", DataTypeManager.DefaultDataTypes.BIG_DECIMAL, QueryPlugin.Util.getString("SystemSource.Atan_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("result", DataTypeManager.DefaultDataTypes.DOUBLE, description) ) );                 //$NON-NLS-1$
  }

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  private void addPiFunction(String name, String description) {
    functions.add(
      new FunctionMethod(name, description, NUMERIC, FUNCTION_CLASS, name,
        new FunctionParameter[] { },
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.DOUBLE, description) ) );                 //$NON-NLS-1$
  }

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    private void addTypedPowerFunction(String baseType, String powerType) { 
        functions.add(
            new FunctionMethod(SourceSystemFunctions.POWER, QueryPlugin.Util.getString("SystemSource.Power_desc"), NUMERIC, FUNCTION_CLASS, "power", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] { 
                    new FunctionParameter("base", baseType, QueryPlugin.Util.getString("SystemSource.Power_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("power", powerType, QueryPlugin.Util.getString("SystemSource.Power_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", baseType, QueryPlugin.Util.getString("SystemSource.Power_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    }

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    private void addTypedRoundFunction(String roundType) { 
        functions.add(
            new FunctionMethod(SourceSystemFunctions.ROUND, QueryPlugin.Util.getString("SystemSource.Round_desc"), NUMERIC, FUNCTION_CLASS, "round", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] { 
                    new FunctionParameter("number", roundType, QueryPlugin.Util.getString("SystemSource.Round_arg1")), //$NON-NLS-1$ //$NON-NLS-2$
                    new FunctionParameter("places", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Round_arg2")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", roundType, QueryPlugin.Util.getString("SystemSource.Round_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    }

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    private void addTypedSignFunction(String type) {        
        functions.add(
            new FunctionMethod(SourceSystemFunctions.SIGN, QueryPlugin.Util.getString("SystemSource.Sign_desc"), NUMERIC, FUNCTION_CLASS, "sign", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] { 
                    new FunctionParameter("number", type, QueryPlugin.Util.getString("SystemSource.Sign_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Sign_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    }

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    private void addTypedSqrtFunction(String type) {        
        functions.add(
            new FunctionMethod(SourceSystemFunctions.SQRT, QueryPlugin.Util.getString("SystemSource.Sqrt_desc"), NUMERIC, FUNCTION_CLASS, "sqrt", //$NON-NLS-1$ //$NON-NLS-2$ 
                new FunctionParameter[] { 
                    new FunctionParameter("number", type, QueryPlugin.Util.getString("SystemSource.Sqrt_arg1")) }, //$NON-NLS-1$ //$NON-NLS-2$
                new FunctionParameter("result", DataTypeManager.DefaultDataTypes.DOUBLE, QueryPlugin.Util.getString("SystemSource.Sqrt_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    }

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     * evaluation.
     */
    private void addConstantDateFunction(String name, String description, String methodName, String returnType) {
        FunctionMethod method = new FunctionMethod(name, description, DATETIME, FUNCTION_CLASS, methodName,
                new FunctionParameter[] {},
                new FunctionParameter("result", returnType, description));                 //$NON-NLS-1$
        method.setDeterminism(Determinism.COMMAND_DETERMINISTIC);
        functions.add(method);
    }

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    private void addDateFunction(String name, String methodName, String dateDesc, String timestampDesc, String returnType) {
        functions.add(
            new FunctionMethod(name, dateDesc, DATETIME, FUNCTION_CLASS, methodName,
                new FunctionParameter[] {
                    new FunctionParameter("date", DataTypeManager.DefaultDataTypes.DATE, dateDesc) }, //$NON-NLS-1$
                new FunctionParameter("result", returnType, dateDesc) ) );                 //$NON-NLS-1$
        functions.add(
            new FunctionMethod(name, timestampDesc, DATETIME, FUNCTION_CLASS, methodName,
                new FunctionParameter[] {
                    new FunctionParameter("timestamp", DataTypeManager.DefaultDataTypes.TIMESTAMP, timestampDesc) }, //$NON-NLS-1$
                new FunctionParameter("result", returnType, timestampDesc) ) );                 //$NON-NLS-1$
    }

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  private void addQuarterFunction(String name, String methodName, String dateDesc, String timestampDesc, String returnType) {
    functions.add(
      new FunctionMethod(name, dateDesc, DATETIME, FUNCTION_CLASS, methodName,
        new FunctionParameter[] {
          new FunctionParameter("date", DataTypeManager.DefaultDataTypes.DATE, dateDesc) }, //$NON-NLS-1$
        new FunctionParameter("result", returnType, dateDesc) ) );                 //$NON-NLS-1$
    functions.add(
      new FunctionMethod(name, timestampDesc, DATETIME, FUNCTION_CLASS, methodName,
        new FunctionParameter[] {
          new FunctionParameter("timestamp", DataTypeManager.DefaultDataTypes.TIMESTAMP, timestampDesc) }, //$NON-NLS-1$
        new FunctionParameter("result", returnType, timestampDesc) ) );                 //$NON-NLS-1$
  }

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  private void addTimestampAddFunction() {
    functions.add(
      new FunctionMethod(SourceSystemFunctions.TIMESTAMPADD, QueryPlugin.Util.getString("SystemSource.Timestampadd_d_desc"), DATETIME, PushDown.SYNTHETIC, null, null, //$NON-NLS-1$ 
        new FunctionParameter[] {
          new FunctionParameter("interval", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Timestampadd_d_arg1")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("count", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Timestampadd_d_arg2")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("timestamp", DataTypeManager.DefaultDataTypes.DATE, QueryPlugin.Util.getString("SystemSource.Timestampadd_d_arg3"))}, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.DATE, QueryPlugin.Util.getString("SystemSource.Timestampadd_d_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    functions.add(
      new FunctionMethod(SourceSystemFunctions.TIMESTAMPADD, QueryPlugin.Util.getString("SystemSource.Timestampadd_t_desc"), DATETIME, PushDown.SYNTHETIC, null, null, //$NON-NLS-1$  
        new FunctionParameter[] {
          new FunctionParameter("interval", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Timestampadd_t_arg1")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("count", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Timestampadd_t_arg2")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("timestamp", DataTypeManager.DefaultDataTypes.TIME, QueryPlugin.Util.getString("SystemSource.Timestampadd_t_arg3"))}, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.TIME, QueryPlugin.Util.getString("SystemSource.Timestampadd_t_result_desc")) ) );                 //$NON-NLS-1$ //$NON-NLS-2$
    functions.add(
      new FunctionMethod(SourceSystemFunctions.TIMESTAMPADD, QueryPlugin.Util.getString("SystemSource.Timestampadd_ts_desc"), DATETIME, FUNCTION_CLASS, "timestampAdd", //$NON-NLS-1$ //$NON-NLS-2$ 
        new FunctionParameter[] {
          new FunctionParameter("interval", DataTypeManager.DefaultDataTypes.STRING, QueryPlugin.Util.getString("SystemSource.Timestampadd_ts_arg1")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("count", DataTypeManager.DefaultDataTypes.INTEGER, QueryPlugin.Util.getString("SystemSource.Timestampadd_ts_arg2")),  //$NON-NLS-1$ //$NON-NLS-2$
          new FunctionParameter("timestamp", DataTypeManager.DefaultDataTypes.TIMESTAMP, QueryPlugin.Util.getString("SystemSource.Timestampadd_ts_arg3"))}, //$NON-NLS-1$ //$NON-NLS-2$
        new FunctionParameter("result", DataTypeManager.DefaultDataTypes.TIMESTAMP, QueryPlugin.Util.getString("SystemSource.Timestampadd_ts_result")) ) );                      //$NON-NLS-1$ //$NON-NLS-2$
  }

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