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18 package org.apache.shardingsphere.infra.binder.context.segment.select.projection.impl;
19
20 import lombok.EqualsAndHashCode;
21 import lombok.Getter;
22 import lombok.RequiredArgsConstructor;
23 import lombok.ToString;
24 import org.apache.shardingsphere.infra.binder.context.segment.select.projection.Projection;
25 import org.apache.shardingsphere.sql.parser.sql.common.enums.ParameterMarkerType;
26 import org.apache.shardingsphere.sql.parser.sql.common.value.identifier.IdentifierValue;
27
28 import java.util.Optional;
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32
33 @RequiredArgsConstructor
34 @Getter
35 @EqualsAndHashCode
36 @ToString
37 public final class ParameterMarkerProjection implements Projection {
38
39 private final int parameterMarkerIndex;
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41 private final ParameterMarkerType parameterMarkerType;
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43 private final IdentifierValue alias;
44
45 @Override
46 public String getColumnName() {
47 return String.valueOf(parameterMarkerIndex);
48 }
49
50 @Override
51 public String getColumnLabel() {
52 return getAlias().map(IdentifierValue::getValue).orElseGet(() -> String.valueOf(parameterMarkerIndex));
53 }
54
55 @Override
56 public String getExpression() {
57 return String.valueOf(parameterMarkerIndex);
58 }
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60 @Override
61 public Optional<IdentifierValue> getAlias() {
62 return Optional.ofNullable(alias);
63 }
64 }