Examples with SqlFunction org.apache.calcite.sql.SqlFunction used on opensource projects

Example 36 with SqlFunction

use of org.apache.calcite.sql.SqlFunction in project flink by apache.

the class SqlValidatorImpl method deriveConstructorType.

public RelDataType deriveConstructorType(SqlValidatorScope scope, SqlCall call, SqlFunction unresolvedConstructor, SqlFunction resolvedConstructor, List<RelDataType> argTypes) {
    SqlIdentifier sqlIdentifier = unresolvedConstructor.getSqlIdentifier();
    assert sqlIdentifier != null;
    RelDataType type = catalogReader.getNamedType(sqlIdentifier);
    if (type == null) {
        // TODO jvs 12-Feb-2005:  proper type name formatting
        throw newValidationError(sqlIdentifier, RESOURCE.unknownDatatypeName(sqlIdentifier.toString()));
    }
    if (resolvedConstructor == null) {
        if (call.operandCount() > 0) {
            // no user-defined constructor could be found
            throw handleUnresolvedFunction(call, unresolvedConstructor, argTypes, null);
        }
    } else {
        SqlCall testCall = resolvedConstructor.createCall(call.getParserPosition(), call.getOperandList());
        RelDataType returnType = resolvedConstructor.validateOperands(this, scope, testCall);
        assert type == returnType;
    }
    if (config.identifierExpansion()) {
        if (resolvedConstructor != null) {
            ((SqlBasicCall) call).setOperator(resolvedConstructor);
        } else {
            // fake a fully-qualified call to the default constructor
            ((SqlBasicCall) call).setOperator(new SqlFunction(type.getSqlIdentifier(), ReturnTypes.explicit(type), null, null, null, SqlFunctionCategory.USER_DEFINED_CONSTRUCTOR));
        }
    }
    return type;
}

Example 37 with SqlFunction

use of org.apache.calcite.sql.SqlFunction in project drill by apache.

the class PreProcessLogicalRel method visit.

@Override
public RelNode visit(LogicalProject project) {
    final List<RexNode> projExpr = Lists.newArrayList();
    for (RexNode rexNode : project.getChildExps()) {
        projExpr.add(rexNode.accept(unwrappingExpressionVisitor));
    }
    project = project.copy(project.getTraitSet(), project.getInput(), projExpr, project.getRowType());
    List<RexNode> exprList = new ArrayList<>();
    boolean rewrite = false;
    for (RexNode rex : project.getChildExps()) {
        RexNode newExpr = rex;
        if (rex instanceof RexCall) {
            RexCall function = (RexCall) rex;
            String functionName = function.getOperator().getName();
            int nArgs = function.getOperands().size();
            // check if its a convert_from or convert_to function
            if (functionName.equalsIgnoreCase("convert_from") || functionName.equalsIgnoreCase("convert_to")) {
                String literal;
                if (nArgs == 2) {
                    if (function.getOperands().get(1) instanceof RexLiteral) {
                        try {
                            literal = ((NlsString) (((RexLiteral) function.getOperands().get(1)).getValue())).getValue();
                        } catch (final ClassCastException e) {
                            // Caused by user entering a value with a non-string literal
                            throw getConvertFunctionInvalidTypeException(function);
                        }
                    } else {
                        // caused by user entering a non-literal
                        throw getConvertFunctionInvalidTypeException(function);
                    }
                } else {
                    // Second operand is missing
                    throw UserException.parseError().message("'%s' expects a string literal as a second argument.", functionName).build(logger);
                }
                RexBuilder builder = new RexBuilder(factory);
                // construct the new function name based on the input argument
                String newFunctionName = functionName + literal;
                // Look up the new function name in the drill operator table
                List<SqlOperator> operatorList = table.getSqlOperator(newFunctionName);
                if (operatorList.size() == 0) {
                    // User typed in an invalid type name
                    throw getConvertFunctionException(functionName, literal);
                }
                SqlFunction newFunction = null;
                // Find the SqlFunction with the correct args
                for (SqlOperator op : operatorList) {
                    if (op.getOperandTypeChecker().getOperandCountRange().isValidCount(nArgs - 1)) {
                        newFunction = (SqlFunction) op;
                        break;
                    }
                }
                if (newFunction == null) {
                    // we are here because we found some dummy convert function. (See DummyConvertFrom and DummyConvertTo)
                    throw getConvertFunctionException(functionName, literal);
                }
                // create the new expression to be used in the rewritten project
                newExpr = builder.makeCall(newFunction, function.getOperands().subList(0, 1));
                rewrite = true;
            }
        }
        exprList.add(newExpr);
    }
    if (rewrite) {
        LogicalProject newProject = project.copy(project.getTraitSet(), project.getInput(0), exprList, project.getRowType());
        return visitChild(newProject, 0, project.getInput());
    }
    return visitChild(project, 0, project.getInput());
}

Example 38 with SqlFunction

use of org.apache.calcite.sql.SqlFunction in project drill by apache.

the class DrillTableInfo method prepareTableMacroOperands.

/**
 * Returns list with operands for table function, obtained from specified call in the order
 * suitable to be used in table function and default values for absent arguments.
 * For example, for the following call:
 * <pre>
 *   `dfs`.`corrupted_dates`(`type` => 'parquet', `autoCorrectCorruptDates` => FALSE, `enableStringsSignedMinMax` => FALSE)
 * </pre>
 * will be returned the following list:
 * <pre>
 *   ['parquet', FALSE, FALSE, DEFAULT]
 * </pre>
 * whose elements correspond to the following parameters:
 * <pre>
 *   [type, autoCorrectCorruptDates, enableStringsSignedMinMax, schema]
 * </pre>
 *
 * @param call sql call whose arguments should be prepared
 * @return list with operands for table function
 */
private static List<SqlNode> prepareTableMacroOperands(SqlCall call) {
    Function<String, SqlNode> convertOperand = paramName -> call.getOperandList().stream().map(sqlNode -> (SqlCall) sqlNode).filter(sqlCall -> ((SqlIdentifier) sqlCall.operand(1)).getSimple().equals(paramName)).peek(sqlCall -> Preconditions.checkState(sqlCall.getKind() == SqlKind.ARGUMENT_ASSIGNMENT)).findFirst().map(sqlCall -> (SqlNode) sqlCall.operand(0)).orElse(SqlStdOperatorTable.DEFAULT.createCall(SqlParserPos.ZERO));
    SqlFunction operator = (SqlFunction) call.getOperator();
    return operator.getParamNames().stream().map(convertOperand).collect(Collectors.toList());
}

Example 39 with SqlFunction

use of org.apache.calcite.sql.SqlFunction in project drill by apache.

the class DrillOperatorTable method populateWrappedCalciteOperators.

private void populateWrappedCalciteOperators() {
    for (SqlOperator calciteOperator : inner.getOperatorList()) {
        final SqlOperator wrapper;
        if (calciteOperator instanceof SqlAggFunction) {
            wrapper = new DrillCalciteSqlAggFunctionWrapper((SqlAggFunction) calciteOperator, getFunctionListWithInference(calciteOperator.getName()));
        } else if (calciteOperator instanceof SqlFunction) {
            wrapper = new DrillCalciteSqlFunctionWrapper((SqlFunction) calciteOperator, getFunctionListWithInference(calciteOperator.getName()));
        } else if (calciteOperator instanceof SqlBetweenOperator) {
            // During the procedure of converting to RexNode,
            // StandardConvertletTable.convertBetween expects the SqlOperator to be a subclass of SqlBetweenOperator
            final SqlBetweenOperator sqlBetweenOperator = (SqlBetweenOperator) calciteOperator;
            wrapper = new DrillCalciteSqlBetweenOperatorWrapper(sqlBetweenOperator);
        } else {
            final String drillOpName;
            // Otherwise, Calcite will mix them up with binary operator subtract (-) or add (+)
            if (calciteOperator == SqlStdOperatorTable.UNARY_MINUS || calciteOperator == SqlStdOperatorTable.UNARY_PLUS) {
                drillOpName = calciteOperator.getName();
            } else {
                drillOpName = FunctionCallFactory.convertToDrillFunctionName(calciteOperator.getName());
            }
            final List<DrillFuncHolder> drillFuncHolders = getFunctionListWithInference(drillOpName);
            if (drillFuncHolders.isEmpty()) {
                continue;
            }
            wrapper = new DrillCalciteSqlOperatorWrapper(calciteOperator, drillOpName, drillFuncHolders);
        }
        calciteToWrapper.put(calciteOperator, wrapper);
    }
}

Example 40 with SqlFunction

use of org.apache.calcite.sql.SqlFunction in project drill by axbaretto.

the class PreProcessLogicalRel method visit.

@Override
public RelNode visit(LogicalProject project) {
    final List<RexNode> projExpr = Lists.newArrayList();
    for (RexNode rexNode : project.getChildExps()) {
        projExpr.add(rexNode.accept(unwrappingExpressionVisitor));
    }
    project = project.copy(project.getTraitSet(), project.getInput(), projExpr, project.getRowType());
    List<RexNode> exprList = new ArrayList<>();
    boolean rewrite = false;
    for (RexNode rex : project.getChildExps()) {
        RexNode newExpr = rex;
        if (rex instanceof RexCall) {
            RexCall function = (RexCall) rex;
            String functionName = function.getOperator().getName();
            int nArgs = function.getOperands().size();
            // check if its a convert_from or convert_to function
            if (functionName.equalsIgnoreCase("convert_from") || functionName.equalsIgnoreCase("convert_to")) {
                String literal;
                if (nArgs == 2) {
                    if (function.getOperands().get(1) instanceof RexLiteral) {
                        try {
                            literal = ((NlsString) (((RexLiteral) function.getOperands().get(1)).getValue())).getValue();
                        } catch (final ClassCastException e) {
                            // Caused by user entering a value with a non-string literal
                            throw getConvertFunctionInvalidTypeException(function);
                        }
                    } else {
                        // caused by user entering a non-literal
                        throw getConvertFunctionInvalidTypeException(function);
                    }
                } else {
                    // Second operand is missing
                    throw UserException.parseError().message("'%s' expects a string literal as a second argument.", functionName).build(logger);
                }
                RexBuilder builder = new RexBuilder(factory);
                // construct the new function name based on the input argument
                String newFunctionName = functionName + literal;
                // Look up the new function name in the drill operator table
                List<SqlOperator> operatorList = table.getSqlOperator(newFunctionName);
                if (operatorList.size() == 0) {
                    // User typed in an invalid type name
                    throw getConvertFunctionException(functionName, literal);
                }
                SqlFunction newFunction = null;
                // Find the SqlFunction with the correct args
                for (SqlOperator op : operatorList) {
                    if (op.getOperandTypeChecker().getOperandCountRange().isValidCount(nArgs - 1)) {
                        newFunction = (SqlFunction) op;
                        break;
                    }
                }
                if (newFunction == null) {
                    // we are here because we found some dummy convert function. (See DummyConvertFrom and DummyConvertTo)
                    throw getConvertFunctionException(functionName, literal);
                }
                // create the new expression to be used in the rewritten project
                newExpr = builder.makeCall(newFunction, function.getOperands().subList(0, 1));
                rewrite = true;
            }
        }
        exprList.add(newExpr);
    }
    if (rewrite == true) {
        LogicalProject newProject = project.copy(project.getTraitSet(), project.getInput(0), exprList, project.getRowType());
        return visitChild(newProject, 0, project.getInput());
    }
    return visitChild(project, 0, project.getInput());
}