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feat(static): initial drop of static query functionality (#3340)
* feat(static): initial drop of static query functionality The change brings in the first batch of functionality for static query. It allows static queries on both windowed and non-windowed aggregate tables, i.e. tables build with a `GROUP BY` clause. For non-windowed queries the following form is accepted: ``` SELECT * FROM X WHERE ROWKEY=Y; ``` - The only filter allowed is an equals filter on ROWKEY. - Only a single ROWKEY is supported at the moment. - Only `SELECT *` is supported at the moment. For windowed queries the following forms is accepted: ``` -- exact window start: SELECT * FROM X WHERE ROWKEY=Y AND WINDOWSTART=X; SELECT * FROM X WHERE ROWKEY=Y AND WINDOWSTART='2020-02-23T23:45:12.000'; -- windwo start range: SELECT * FROM X WHERE ROWKEY=Y AND WINDOWSTART>A AND WINDOWSTART<=B; SELECT * FROM X WHERE ROWKEY=Y AND '2020-02-23T23:45:12.000' < WINDOWSTART AND WINDOWSTART <= '2020-02-24T23:45:12.000'; ``` All types of windowed tables are supported. At the moment, static query requests are served over the standard `/ksql` HTTP POST request. But this may change to being a websocket request. * chore: fix test * chore: reviewer's requested changes
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...li/src/main/java/io/confluent/ksql/cli/console/table/builder/QueryResultTableBuilder.java
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| /* | ||
| * Copyright 2019 Confluent Inc. | ||
| * | ||
| * Licensed under the Confluent Community License (the "License"); you may not use | ||
| * this file except in compliance with the License. You may obtain a copy of the | ||
| * License at | ||
| * | ||
| * http://www.confluent.io/confluent-community-license | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| */ | ||
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| package io.confluent.ksql.cli.console.table.builder; | ||
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| import com.google.common.collect.ImmutableList; | ||
| import io.confluent.ksql.cli.console.table.Table; | ||
| import io.confluent.ksql.cli.console.table.Table.Builder; | ||
| import io.confluent.ksql.model.WindowType; | ||
| import io.confluent.ksql.rest.entity.QueryResultEntity; | ||
| import io.confluent.ksql.rest.entity.QueryResultEntity.Row; | ||
| import io.confluent.ksql.schema.ksql.Column; | ||
| import io.confluent.ksql.schema.ksql.LogicalSchema; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.Stream; | ||
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| public class QueryResultTableBuilder implements TableBuilder<QueryResultEntity> { | ||
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| private static final List<String> TIME_WINDOW_HEADINGS = ImmutableList | ||
| .of("WINDOWSTART BIGINT"); | ||
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| private static final List<String> SESSION_WINDOW_HEADINGS = ImmutableList.<String>builder() | ||
| .addAll(TIME_WINDOW_HEADINGS) | ||
| .add("WINDOWEND BIGINT") | ||
| .build(); | ||
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| @Override | ||
| public Table buildTable(final QueryResultEntity entity) { | ||
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| final List<String> headers = buildHeadings(entity); | ||
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| final Stream<List<String>> rows = entity | ||
| .getRows() | ||
| .stream() | ||
| .map(r -> buildRow(r, entity.getSchema().value())); | ||
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| return new Builder() | ||
| .withColumnHeaders(headers) | ||
| .withRows(rows) | ||
| .build(); | ||
| } | ||
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| private static List<String> buildHeadings(final QueryResultEntity entity) { | ||
| final LogicalSchema schema = entity.getSchema(); | ||
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| final Stream<String> keys = schema.key().stream() | ||
| .map(f -> f.fullName() + " " + f.type() + " KEY"); | ||
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| final Stream<String> window = entity.getWindowType() | ||
| .map(wt -> wt == WindowType.SESSION | ||
| ? SESSION_WINDOW_HEADINGS | ||
| : TIME_WINDOW_HEADINGS) | ||
| .orElse(ImmutableList.of()) | ||
| .stream(); | ||
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| final Stream<String> values = schema.value().stream() | ||
| .map(f -> f.fullName() + " " + f.type()); | ||
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| return Stream.concat(keys, Stream.concat(window, values)) | ||
| .collect(Collectors.toList()); | ||
| } | ||
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| private static List<String> buildRow( | ||
| final Row row, | ||
| final List<Column> valueSchema | ||
| ) { | ||
| final Stream<?> keys = row.getKey().values().stream(); | ||
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| final Stream<?> window = row.getWindow() | ||
| .map(w -> w.getEnd().isPresent() | ||
| ? Stream.of(w.getStart(), w.getEnd().getAsLong()) | ||
| : Stream.of(w.getStart())) | ||
| .orElse(Stream.of()); | ||
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| final Stream<?> values = row.getValue() == null | ||
| ? valueSchema.stream().map(f -> null) | ||
| : row.getValue().values().stream(); | ||
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| return Stream.concat(keys, Stream.concat(window, values)) | ||
| .map(Objects::toString) | ||
| .collect(Collectors.toList()); | ||
| } | ||
| } |
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