Examples with SqlAbstractGroupFunction org.apache.calcite.sql.fun.SqlAbstractGroupFunction used on opensource projects

Example 1 with SqlAbstractGroupFunction

use of org.apache.calcite.sql.fun.SqlAbstractGroupFunction in project calcite by apache.

the class AggVisitor method visit.

public Void visit(SqlCall call) {
    final SqlOperator operator = call.getOperator();
    // If nested aggregates disallowed or found an aggregate at invalid level
    if (operator.isAggregator() && !(operator instanceof SqlAbstractGroupFunction) && !operator.requiresOver()) {
        if (delegate != null) {
            return operator.acceptCall(delegate, call);
        }
        if (aggregate) {
            return found(call);
        }
    }
    if (group && operator.isGroup()) {
        return found(call);
    }
    // User-defined function may not be resolved yet.
    if (operator instanceof SqlFunction) {
        final SqlFunction sqlFunction = (SqlFunction) operator;
        if (sqlFunction.getFunctionType().isUserDefinedNotSpecificFunction()) {
            final List<SqlOperator> list = Lists.newArrayList();
            opTab.lookupOperatorOverloads(sqlFunction.getSqlIdentifier(), sqlFunction.getFunctionType(), SqlSyntax.FUNCTION, list);
            for (SqlOperator operator2 : list) {
                if (operator2.isAggregator() && !operator2.requiresOver()) {
                    // level
                    if (aggregate) {
                        found(call);
                    }
                }
            }
        }
    }
    if (call.isA(SqlKind.QUERY)) {
        // don't traverse into queries
        return null;
    }
    if (call.getKind() == SqlKind.OVER) {
        if (over) {
            return found(call);
        } else {
            // an aggregate function over a window is not an aggregate!
            return null;
        }
    }
    return super.visit(call);
}