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IGNITE-4490: SQL: avoid querying H2 for INSERT and MERGE when it is n…
…ot needed. This closes #1387.
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104 changes: 104 additions & 0 deletions
104
...dexing/src/main/java/org/apache/ignite/internal/processors/query/h2/dml/DmlArguments.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (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.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS 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 org.apache.ignite.internal.processors.query.h2.dml; | ||
|
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| import org.apache.ignite.internal.processors.query.h2.sql.GridSqlConst; | ||
| import org.apache.ignite.internal.processors.query.h2.sql.GridSqlElement; | ||
| import org.apache.ignite.internal.processors.query.h2.sql.GridSqlParameter; | ||
| import org.jetbrains.annotations.Nullable; | ||
|
|
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| /** | ||
| * DML arguments factory. | ||
| */ | ||
| public class DmlArguments { | ||
| /** Operand that always evaluates as {@code null}. */ | ||
| private final static DmlArgument NULL_ARG = new ConstantArgument(null); | ||
|
|
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| /** | ||
| * Create argument from AST element. | ||
| * | ||
| * @param el Element. | ||
| * @return DML argument. | ||
| */ | ||
| public static DmlArgument create(@Nullable GridSqlElement el) { | ||
| assert el == null ^ (el instanceof GridSqlConst || el instanceof GridSqlParameter); | ||
|
|
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| if (el == null) | ||
| return NULL_ARG; | ||
|
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| if (el instanceof GridSqlConst) | ||
| return new ConstantArgument(((GridSqlConst)el).value().getObject()); | ||
| else | ||
| return new ParamArgument(((GridSqlParameter)el).index()); | ||
| } | ||
|
|
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| /** | ||
| * Private constructor. | ||
| */ | ||
| private DmlArguments() { | ||
| // No-op. | ||
| } | ||
|
|
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| /** | ||
| * Value argument. | ||
| */ | ||
| private static class ConstantArgument implements DmlArgument { | ||
| /** Value to return. */ | ||
| private final Object val; | ||
|
|
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| /** | ||
| * Constructor. | ||
| * | ||
| * @param val Value. | ||
| */ | ||
| private ConstantArgument(Object val) { | ||
| this.val = val; | ||
| } | ||
|
|
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| /** {@inheritDoc} */ | ||
| public Object get(Object[] params) { | ||
| return val; | ||
| } | ||
| } | ||
|
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| /** | ||
| * Parameter argument. | ||
| */ | ||
| private static class ParamArgument implements DmlArgument { | ||
| /** Value to return. */ | ||
| private final int paramIdx; | ||
|
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| /** | ||
| * Constructor. | ||
| * | ||
| * @param paramIdx Parameter index. | ||
| */ | ||
| private ParamArgument(int paramIdx) { | ||
| assert paramIdx >= 0; | ||
|
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| this.paramIdx = paramIdx; | ||
| } | ||
|
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| /** {@inheritDoc} */ | ||
| @Override public Object get(Object[] params) { | ||
| assert params.length > paramIdx; | ||
|
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| return params[paramIdx]; | ||
| } | ||
| } | ||
| } |
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