Examples with DATA_WINDOW_FUNCTION org.jooq.impl.Tools.DataExtendedKey.DATA_WINDOW_FUNCTION used on opensource projects

Example 1 with DATA_WINDOW_FUNCTION

use of org.jooq.impl.Tools.DataExtendedKey.DATA_WINDOW_FUNCTION in project jOOQ by jOOQ.

the class WindowSpecificationImpl method accept.

@Override
public final void accept(Context<?> ctx) {
    SortFieldList o = orderBy;
    // [#8414] [#8593] [#11021] [#11851] Some RDBMS require ORDER BY in some window functions
    AbstractWindowFunction<?> w = (AbstractWindowFunction<?>) ctx.data(DATA_WINDOW_FUNCTION);
    if (o.isEmpty()) {
        boolean ordered = w instanceof Ntile && REQUIRES_ORDER_BY_IN_NTILE.contains(ctx.dialect()) || w instanceof Lead && REQUIRES_ORDER_BY_IN_LEAD_LAG.contains(ctx.dialect()) || w instanceof Lag && REQUIRES_ORDER_BY_IN_LEAD_LAG.contains(ctx.dialect()) || w instanceof Rank && REQUIRES_ORDER_BY_IN_RANK_DENSE_RANK.contains(ctx.dialect()) || w instanceof DenseRank && REQUIRES_ORDER_BY_IN_RANK_DENSE_RANK.contains(ctx.dialect()) || w instanceof PercentRank && REQUIRES_ORDER_BY_IN_PERCENT_RANK_CUME_DIST.contains(ctx.dialect()) || w instanceof CumeDist && REQUIRES_ORDER_BY_IN_PERCENT_RANK_CUME_DIST.contains(ctx.dialect());
        if (ordered) {
            Field<Integer> constant;
            switch(ctx.family()) {
                default:
                    constant = field(select(one()));
                    break;
            }
            o = new SortFieldList();
            o.add(constant.sortDefault());
        }
    }
    boolean hasWindowDefinitions = windowDefinition != null;
    boolean hasPartitionBy = !partitionBy.isEmpty();
    boolean hasOrderBy = !o.isEmpty();
    boolean hasFrame = frameStart != null;
    int clauses = 0;
    if (hasWindowDefinitions)
        clauses++;
    if (hasPartitionBy)
        clauses++;
    if (hasOrderBy)
        clauses++;
    if (hasFrame)
        clauses++;
    boolean indent = clauses > 1;
    if (indent)
        ctx.formatIndentStart().formatNewLine();
    if (windowDefinition != null)
        ctx.declareWindows(false, c -> c.visit(windowDefinition));
    if (hasPartitionBy) {
        // constant expressions in the PARTITION BY clause (HANA)
        if (partitionByOne && OMIT_PARTITION_BY_ONE.contains(ctx.dialect())) {
        } else {
            if (hasWindowDefinitions)
                ctx.formatSeparator();
            ctx.visit(K_PARTITION_BY).separatorRequired(true).visit(partitionBy);
        }
    }
    if (hasOrderBy) {
        if (hasWindowDefinitions || hasPartitionBy)
            ctx.formatSeparator();
        ctx.visit(K_ORDER_BY).separatorRequired(true).visit(o);
    }
    if (hasFrame) {
        if (hasWindowDefinitions || hasPartitionBy || hasOrderBy)
            ctx.formatSeparator();
        FrameUnits u = frameUnits;
        Integer s = frameStart;
        Integer e = frameEnd;
        ctx.visit(u.keyword).sql(' ');
        if (e != null) {
            ctx.visit(K_BETWEEN).sql(' ');
            toSQLRows(ctx, s);
            ctx.sql(' ').visit(K_AND).sql(' ');
            toSQLRows(ctx, e);
        } else {
            toSQLRows(ctx, s);
        }
        if (exclude != null)
            ctx.sql(' ').visit(K_EXCLUDE).sql(' ').visit(exclude.keyword);
    }
    if (indent)
        ctx.formatIndentEnd().formatNewLine();
}