Examples with FieldsQueryCursor org.apache.ignite.cache.query.FieldsQueryCursor used on opensource projects

Example 1 with FieldsQueryCursor

use of org.apache.ignite.cache.query.FieldsQueryCursor in project ignite by apache.

the class GridQueryProcessor method querySqlFieldsNoCache.

/**
     * Query SQL fields without strict dependency on concrete cache.
     *
     * @param qry Query.
     * @param keepBinary Keep binary flag.
     * @return Cursor.
     */
public FieldsQueryCursor<List<?>> querySqlFieldsNoCache(final SqlFieldsQuery qry, final boolean keepBinary) {
    checkxEnabled();
    validateSqlFieldsQuery(qry);
    if (qry.isLocal())
        throw new IgniteException("Local query is not supported without specific cache.");
    if (qry.getSchema() == null)
        qry.setSchema(QueryUtils.DFLT_SCHEMA);
    if (!busyLock.enterBusy())
        throw new IllegalStateException("Failed to execute query (grid is stopping).");
    try {
        IgniteOutClosureX<FieldsQueryCursor<List<?>>> clo = new IgniteOutClosureX<FieldsQueryCursor<List<?>>>() {

            @Override
            public FieldsQueryCursor<List<?>> applyx() throws IgniteCheckedException {
                GridQueryCancel cancel = new GridQueryCancel();
                return idx.queryDistributedSqlFields(qry.getSchema(), qry, keepBinary, cancel, null);
            }
        };
        return executeQuery(GridCacheQueryType.SQL_FIELDS, qry.getSql(), null, clo, true);
    } catch (IgniteCheckedException e) {
        throw new CacheException(e);
    } finally {
        busyLock.leaveBusy();
    }
}

Example 2 with FieldsQueryCursor

use of org.apache.ignite.cache.query.FieldsQueryCursor in project ignite by apache.

the class IgniteCacheProxy method query.

/** {@inheritDoc} */
@SuppressWarnings("unchecked")
@Override
public <R> QueryCursor<R> query(Query<R> qry) {
    A.notNull(qry, "qry");
    GridCacheGateway<K, V> gate = this.gate;
    CacheOperationContext prev = onEnter(gate, opCtx);
    try {
        ctx.checkSecurity(SecurityPermission.CACHE_READ);
        validate(qry);
        convertToBinary(qry);
        CacheOperationContext opCtxCall = ctx.operationContextPerCall();
        boolean keepBinary = opCtxCall != null && opCtxCall.isKeepBinary();
        if (qry instanceof ContinuousQuery)
            return (QueryCursor<R>) queryContinuous((ContinuousQuery<K, V>) qry, qry.isLocal(), keepBinary);
        if (qry instanceof SqlQuery)
            return (QueryCursor<R>) ctx.kernalContext().query().querySql(ctx, (SqlQuery) qry, keepBinary);
        if (qry instanceof SqlFieldsQuery)
            return (FieldsQueryCursor<R>) ctx.kernalContext().query().querySqlFields(ctx, (SqlFieldsQuery) qry, keepBinary);
        if (qry instanceof ScanQuery)
            return query((ScanQuery) qry, null, projection(qry.isLocal()));
        return (QueryCursor<R>) query(qry, projection(qry.isLocal()));
    } catch (Exception e) {
        if (e instanceof CacheException)
            throw (CacheException) e;
        throw new CacheException(e);
    } finally {
        onLeave(gate, prev);
    }
}

Example 3 with FieldsQueryCursor

use of org.apache.ignite.cache.query.FieldsQueryCursor in project ignite by apache.

the class GridQueryProcessor method querySqlFields.

/**
     * Query SQL fields.
     *
     * @param cctx Cache context.
     * @param qry Query.
     * @param keepBinary Keep binary flag.
     * @return Cursor.
     */
@SuppressWarnings("unchecked")
public FieldsQueryCursor<List<?>> querySqlFields(final GridCacheContext<?, ?> cctx, final SqlFieldsQuery qry, final boolean keepBinary) {
    checkxEnabled();
    validateSqlFieldsQuery(qry);
    boolean loc = (qry.isReplicatedOnly() && cctx.isReplicatedAffinityNode()) || cctx.isLocal() || qry.isLocal();
    if (!busyLock.enterBusy())
        throw new IllegalStateException("Failed to execute query (grid is stopping).");
    try {
        final String schemaName = qry.getSchema() != null ? qry.getSchema() : idx.schema(cctx.name());
        final int mainCacheId = CU.cacheId(cctx.name());
        IgniteOutClosureX<FieldsQueryCursor<List<?>>> clo;
        if (loc) {
            clo = new IgniteOutClosureX<FieldsQueryCursor<List<?>>>() {

                @Override
                public FieldsQueryCursor<List<?>> applyx() throws IgniteCheckedException {
                    GridQueryCancel cancel = new GridQueryCancel();
                    FieldsQueryCursor<List<?>> cur;
                    if (cctx.config().getQueryParallelism() > 1) {
                        qry.setDistributedJoins(true);
                        cur = idx.queryDistributedSqlFields(schemaName, qry, keepBinary, cancel, mainCacheId);
                    } else {
                        IndexingQueryFilter filter = idx.backupFilter(requestTopVer.get(), qry.getPartitions());
                        cur = idx.queryLocalSqlFields(schemaName, qry, keepBinary, filter, cancel);
                    }
                    sendQueryExecutedEvent(qry.getSql(), qry.getArgs(), cctx.name());
                    return cur;
                }
            };
        } else {
            clo = new IgniteOutClosureX<FieldsQueryCursor<List<?>>>() {

                @Override
                public FieldsQueryCursor<List<?>> applyx() throws IgniteCheckedException {
                    return idx.queryDistributedSqlFields(schemaName, qry, keepBinary, null, mainCacheId);
                }
            };
        }
        return executeQuery(GridCacheQueryType.SQL_FIELDS, qry.getSql(), cctx, clo, true);
    } catch (IgniteCheckedException e) {
        throw new CacheException(e);
    } finally {
        busyLock.leaveBusy();
    }
}