001package gudusoft.gsqlparser.nodes;
002
003
004import gudusoft.gsqlparser.EUniqueRowFilterType;
005import gudusoft.gsqlparser.TBaseType;
006
007public class TSelectDistinct extends TParseTreeNode {
008    private int distinctType = TBaseType.dtNone;
009    private EUniqueRowFilterType uniqueRowFilter = EUniqueRowFilterType.urfNone;
010
011    public void setUniqueRowFilter(EUniqueRowFilterType uniqueRowFilter) {
012        this.uniqueRowFilter = uniqueRowFilter;
013    }
014
015    public EUniqueRowFilterType getUniqueRowFilter() {
016
017        return uniqueRowFilter;
018    }
019
020    private  TExpressionList expressionList;
021
022    public TExpressionList getExpressionList() {
023        return expressionList;
024    }
025
026    public void setDistinctType(int distinctType) {
027        this.distinctType = distinctType;
028    }
029
030    public boolean isAll(){
031        return uniqueRowFilter == EUniqueRowFilterType.urfAll;
032    }
033
034    /**
035     * @deprecated As of 1.7.3.3, replaced by {@link #getUniqueRowFilter()}
036     */
037    public int getDistinctType() {
038
039        return distinctType;
040    }
041
042    public void init(Object arg1){
043        this.expressionList = (TExpressionList)arg1;
044    }
045
046    public void setExpressionList(TExpressionList expressionList) {
047        this.expressionList = expressionList;
048    }
049
050    public void accept(TParseTreeVisitor v){
051        v.preVisit(this);
052        v.postVisit(this);
053    }
054
055    public void acceptChildren(TParseTreeVisitor v){
056        v.preVisit(this);
057        // Slice 73: descend into the DISTINCT ON expression list so
058        // visitor-based passes (resolver-2 ScopeBuilder, Semantic IR
059        // builder collectors) see the partition expressions. Without
060        // this, `SELECT DISTINCT ON (a) ...` leaves `a` invisible to
061        // any visitor walking from the enclosing TSelectSqlStatement,
062        // because TSelectSqlStatement.acceptChildren calls
063        // selectDistinct.acceptChildren but the latter previously did
064        // not recurse into expressionList. Delegates to
065        // TExpressionList.acceptChildren (inherited from
066        // TParseTreeNodeList), which iterates element children.
067        if (expressionList != null) {
068            expressionList.acceptChildren(v);
069        }
070        v.postVisit(this);
071    }
072}