Examples with K_LIMIT org.jooq.impl.Keywords.K_LIMIT used on opensource projects

Example 1 with K_LIMIT

use of org.jooq.impl.Keywords.K_LIMIT in project jOOQ by jOOQ.

the class UpdateQueryImpl method accept0.

@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
final void accept0(Context<?> ctx) {
    boolean declareTables = ctx.declareTables();
    ctx.start(UPDATE_UPDATE).visit(K_UPDATE).sql(' ').declareTables(true).visit(table(ctx)).declareTables(declareTables).end(UPDATE_UPDATE);
    ctx.formatSeparator().start(UPDATE_SET).visit(K_SET).separatorRequired(true);
    // A multi-row update was specified
    if (multiRow != null) {
        // [#6884] This syntax can be emulated trivially, if the RHS is not a SELECT subquery
        if (multiValue != null && !SUPPORT_RVE_SET.contains(ctx.dialect())) {
            FieldMapForUpdate map = new FieldMapForUpdate(table(), UPDATE_SET_ASSIGNMENT);
            for (int i = 0; i < multiRow.size(); i++) {
                Field<?> k = multiRow.field(i);
                Field<?> v = multiValue.field(i);
                map.put(k, Tools.field(v, k));
            }
            ctx.formatIndentStart().formatSeparator().visit(map).formatIndentEnd();
        } else {
            Row row = removeReadonly(ctx, multiRow);
            ctx.start(UPDATE_SET_ASSIGNMENT).formatIndentStart().formatSeparator().qualify(false, c -> c.visit(row)).sql(" = ");
            // right hand side of a SET clause
            if (multiValue != null) {
                // single-degree rows. Let's just always render it, here.
                if (REQUIRE_RVE_ROW_CLAUSE.contains(ctx.dialect()))
                    ctx.visit(K_ROW).sql(" ");
                ctx.visit(removeReadonly(ctx, multiRow, multiValue));
            } else // Subselects or subselect emulations of row value expressions
            {
                Select<?> select;
                if (multiValue != null)
                    select = select(removeReadonly(ctx, multiRow, multiValue).fields());
                else
                    select = multiSelect;
                visitSubquery(ctx, select, false, false, false);
            }
            ctx.formatIndentEnd().end(UPDATE_SET_ASSIGNMENT);
        }
    } else // A regular (non-multi-row) update was specified
    {
        ctx.formatIndentStart().formatSeparator().visit(updateMap).formatIndentEnd();
    }
    ctx.end(UPDATE_SET);
    switch(ctx.family()) {
        default:
            acceptFrom(ctx);
            break;
    }
    if (limit != null && NO_SUPPORT_LIMIT.contains(ctx.dialect()) || !orderBy.isEmpty() && NO_SUPPORT_ORDER_BY_LIMIT.contains(ctx.dialect())) {
        Field<?>[] keyFields = table().getKeys().isEmpty() ? new Field[] { table().rowid() } : (table().getPrimaryKey() != null ? table().getPrimaryKey() : table().getKeys().get(0)).getFieldsArray();
        ctx.start(UPDATE_WHERE).formatSeparator().visit(K_WHERE).sql(' ');
        if (keyFields.length == 1)
            ctx.visit(keyFields[0].in(select((Field) keyFields[0]).from(table()).where(getWhere()).orderBy(orderBy).limit(limit)));
        else
            ctx.visit(row(keyFields).in(select(keyFields).from(table()).where(getWhere()).orderBy(orderBy).limit(limit)));
        ctx.end(UPDATE_WHERE);
    } else {
        ctx.start(UPDATE_WHERE);
        if (hasWhere())
            ctx.formatSeparator().visit(K_WHERE).sql(' ').visit(getWhere());
        ctx.end(UPDATE_WHERE);
        if (!orderBy.isEmpty())
            ctx.formatSeparator().visit(K_ORDER_BY).sql(' ').visit(orderBy);
        if (limit != null)
            ctx.formatSeparator().visit(K_LIMIT).sql(' ').visit(limit);
    }
    ctx.start(UPDATE_RETURNING);
    toSQLReturning(ctx);
    ctx.end(UPDATE_RETURNING);
}