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[FLINK-32300][jdbc-driver] Support getObject for FlinkResultSet
Close #22757
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121 changes: 121 additions & 0 deletions
121
...ink-sql-jdbc-driver/src/main/java/org/apache/flink/table/jdbc/utils/ArrayFieldGetter.java
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| /* | ||
| * 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.flink.table.jdbc.utils; | ||
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| import org.apache.flink.table.data.ArrayData; | ||
| import org.apache.flink.table.types.logical.DistinctType; | ||
| import org.apache.flink.table.types.logical.LogicalType; | ||
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| import javax.annotation.Nullable; | ||
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| import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getFieldCount; | ||
| import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getPrecision; | ||
| import static org.apache.flink.table.types.logical.utils.LogicalTypeChecks.getScale; | ||
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| /** Creates an accessor for getting elements in an array data structure at the given position. */ | ||
| public interface ArrayFieldGetter { | ||
| @Nullable | ||
| Object getObjectOrNull(ArrayData array, int index); | ||
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| static ArrayFieldGetter createFieldGetter(LogicalType type) { | ||
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| final ArrayFieldGetter fieldGetter; | ||
| // ordered by type root definition | ||
| switch (type.getTypeRoot()) { | ||
| case CHAR: | ||
| case VARCHAR: | ||
| fieldGetter = ArrayData::getString; | ||
| break; | ||
| case BOOLEAN: | ||
| fieldGetter = ArrayData::getBoolean; | ||
| break; | ||
| case BINARY: | ||
| case VARBINARY: | ||
| fieldGetter = ArrayData::getBinary; | ||
| break; | ||
| case DECIMAL: | ||
| final int decimalPrecision = getPrecision(type); | ||
| final int decimalScale = getScale(type); | ||
| fieldGetter = | ||
| (array, index) -> array.getDecimal(index, decimalPrecision, decimalScale); | ||
| break; | ||
| case TINYINT: | ||
| fieldGetter = ArrayData::getByte; | ||
| break; | ||
| case SMALLINT: | ||
| fieldGetter = ArrayData::getShort; | ||
| break; | ||
| case INTEGER: | ||
| case DATE: | ||
| case TIME_WITHOUT_TIME_ZONE: | ||
| case INTERVAL_YEAR_MONTH: | ||
| fieldGetter = ArrayData::getInt; | ||
| break; | ||
| case BIGINT: | ||
| case INTERVAL_DAY_TIME: | ||
| fieldGetter = ArrayData::getLong; | ||
| break; | ||
| case FLOAT: | ||
| fieldGetter = ArrayData::getFloat; | ||
| break; | ||
| case DOUBLE: | ||
| fieldGetter = ArrayData::getDouble; | ||
| break; | ||
| case TIMESTAMP_WITHOUT_TIME_ZONE: | ||
| case TIMESTAMP_WITH_LOCAL_TIME_ZONE: | ||
| final int timestampPrecision = getPrecision(type); | ||
| fieldGetter = (array, index) -> array.getTimestamp(index, timestampPrecision); | ||
| break; | ||
| case TIMESTAMP_WITH_TIME_ZONE: | ||
| throw new UnsupportedOperationException(); | ||
| case ARRAY: | ||
| fieldGetter = ArrayData::getArray; | ||
| break; | ||
| case MULTISET: | ||
| case MAP: | ||
| fieldGetter = ArrayData::getMap; | ||
| break; | ||
| case ROW: | ||
| case STRUCTURED_TYPE: | ||
| final int arrayFieldCount = getFieldCount(type); | ||
| fieldGetter = (array, index) -> array.getRow(index, arrayFieldCount); | ||
| break; | ||
| case DISTINCT_TYPE: | ||
| fieldGetter = createFieldGetter(((DistinctType) type).getSourceType()); | ||
| break; | ||
| case RAW: | ||
| fieldGetter = ArrayData::getRawValue; | ||
| break; | ||
| case NULL: | ||
| case SYMBOL: | ||
| case UNRESOLVED: | ||
| default: | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| if (!type.isNullable()) { | ||
| return fieldGetter; | ||
| } | ||
| return (array, index) -> { | ||
| if (array.isNullAt(index)) { | ||
| return null; | ||
| } | ||
| return fieldGetter.getObjectOrNull(array, index); | ||
| }; | ||
| } | ||
| } |
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