How to use

filterMustBeBoolean

method

in

org.apache.calcite.runtime.CalciteResource

/** Creates a call to an aggregate function. */
public AggCall aggregateCall(SqlAggFunction aggFunction, boolean distinct,
               RexNode filter, String alias, Iterable<? extends RexNode> operands) {
 if (filter != null) {
  if (filter.getType().getSqlTypeName() != SqlTypeName.BOOLEAN) {
   throw Static.RESOURCE.filterMustBeBoolean().ex();
  }
  if (filter.getType().isNullable()) {
   filter = call(SqlStdOperatorTable.IS_TRUE, filter);
  }
 }
 return new AggCallImpl(aggFunction, distinct, filter, alias,
   ImmutableList.copyOf(operands));
}

/** Creates a call to an aggregate function. */
public AggCall aggregateCall(SqlAggFunction aggFunction, boolean distinct,
               RexNode filter, String alias, Iterable<? extends RexNode> operands) {
 if (filter != null) {
  if (filter.getType().getSqlTypeName() != SqlTypeName.BOOLEAN) {
   throw Static.RESOURCE.filterMustBeBoolean().ex();
  }
  if (filter.getType().isNullable()) {
   filter = call(SqlStdOperatorTable.IS_TRUE, filter);
  }
 }
 return new AggCallImpl(aggFunction, distinct, filter, alias,
     ImmutableList.copyOf(operands));
}

AggCallImpl(SqlAggFunction aggFunction, boolean distinct,
  boolean approximate, RexNode filter,
  String alias, ImmutableList<RexNode> operands,
  ImmutableList<RexNode> orderKeys) {
 this.aggFunction = Objects.requireNonNull(aggFunction);
 this.distinct = distinct;
 this.approximate = approximate;
 this.alias = alias;
 this.operands = Objects.requireNonNull(operands);
 this.orderKeys = Objects.requireNonNull(orderKeys);
 if (filter != null) {
  if (filter.getType().getSqlTypeName() != SqlTypeName.BOOLEAN) {
   throw RESOURCE.filterMustBeBoolean().ex();
  }
  if (filter.getType().isNullable()) {
   filter = call(SqlStdOperatorTable.IS_TRUE, filter);
  }
 }
 this.filter = filter;
}

/** Creates a call to an aggregate function. */
public AggCall aggregateCall(SqlAggFunction aggFunction, boolean distinct,
  boolean approximate, RexNode filter, String alias,
  Iterable<? extends RexNode> operands) {
 if (filter != null) {
  if (filter.getType().getSqlTypeName() != SqlTypeName.BOOLEAN) {
   throw RESOURCE.filterMustBeBoolean().ex();
  }
  if (filter.getType().isNullable()) {
   filter = call(SqlStdOperatorTable.IS_TRUE, filter);
  }
 }
 return new AggCallImpl(aggFunction, distinct, approximate, filter, alias,
   ImmutableList.copyOf(operands));
}