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[jOOQ/jOOQ#7284] Remove empty scalar subqueries

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This commit is contained in:
Lukas Eder 2022-01-18 12:57:24 +01:00
parent 302c420fa2
commit 764f227093
3 changed files with 68 additions and 0 deletions
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46
jOOQ/src/main/java/org/jooq/conf/Settings.java
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@ -124,6 +124,8 @@ public class Settings
@XmlElement(defaultValue = "true")
protected Boolean transformPatternsTrivialPredicates = true;
@XmlElement(defaultValue = "true")
protected Boolean transformPatternsEmptyScalarSubquery = true;
@XmlElement(defaultValue = "true")
protected Boolean transformPatternsNegNeg = true;
@XmlElement(defaultValue = "true")
protected Boolean transformPatternsBitNotBitNot = true;
@ -1306,6 +1308,34 @@ public class Settings
this.transformPatternsTrivialPredicates = value;
}
/**
* Transform empty scalar subqueries like <code>(SELECT 1 WHERE FALSE)</code> to <code>NULL</code>.
* <p>
* Scalar subqueries that are guaranteed to produce no results can be replaced by a <code>NULL</code> value.
* <p>
* This feature is available in the commercial distribution only.
*
* @return
* possible object is
* {@link Boolean }
*
*/
public Boolean isTransformPatternsEmptyScalarSubquery() {
return transformPatternsEmptyScalarSubquery;
}
/**
* Sets the value of the transformPatternsEmptyScalarSubquery property.
*
* @param value
* allowed object is
* {@link Boolean }
*
*/
public void setTransformPatternsEmptyScalarSubquery(Boolean value) {
this.transformPatternsEmptyScalarSubquery = value;
}
/**
* Transform <code>-(-(x))</code> to <code>x</code>
* <p>
@ -3672,6 +3702,11 @@ public class Settings
return this;
}
public Settings withTransformPatternsEmptyScalarSubquery(Boolean value) {
setTransformPatternsEmptyScalarSubquery(value);
return this;
}
public Settings withTransformPatternsNegNeg(Boolean value) {
setTransformPatternsNegNeg(value);
return this;
@ -4516,6 +4551,7 @@ public class Settings
builder.append("transformPatternsNotComparison", transformPatternsNotComparison);
builder.append("transformPatternsNotNotDistinct", transformPatternsNotNotDistinct);
builder.append("transformPatternsTrivialPredicates", transformPatternsTrivialPredicates);
builder.append("transformPatternsEmptyScalarSubquery", transformPatternsEmptyScalarSubquery);
builder.append("transformPatternsNegNeg", transformPatternsNegNeg);
builder.append("transformPatternsBitNotBitNot", transformPatternsBitNotBitNot);
builder.append("transformPatternsIdempotentFunctionRepetition", transformPatternsIdempotentFunctionRepetition);
@ -4968,6 +5004,15 @@ public class Settings
return false;
}
}
if (transformPatternsEmptyScalarSubquery == null) {
if (other.transformPatternsEmptyScalarSubquery!= null) {
return false;
}
} else {
if (!transformPatternsEmptyScalarSubquery.equals(other.transformPatternsEmptyScalarSubquery)) {
return false;
}
}
if (transformPatternsNegNeg == null) {
if (other.transformPatternsNegNeg!= null) {
return false;
@ -5894,6 +5939,7 @@ public class Settings
result = ((prime*result)+((transformPatternsNotComparison == null)? 0 :transformPatternsNotComparison.hashCode()));
result = ((prime*result)+((transformPatternsNotNotDistinct == null)? 0 :transformPatternsNotNotDistinct.hashCode()));
result = ((prime*result)+((transformPatternsTrivialPredicates == null)? 0 :transformPatternsTrivialPredicates.hashCode()));
result = ((prime*result)+((transformPatternsEmptyScalarSubquery == null)? 0 :transformPatternsEmptyScalarSubquery.hashCode()));
result = ((prime*result)+((transformPatternsNegNeg == null)? 0 :transformPatternsNegNeg.hashCode()));
result = ((prime*result)+((transformPatternsBitNotBitNot == null)? 0 :transformPatternsBitNotBitNot.hashCode()));
result = ((prime*result)+((transformPatternsIdempotentFunctionRepetition == null)? 0 :transformPatternsIdempotentFunctionRepetition.hashCode()));

14
jOOQ/src/main/java/org/jooq/impl/TransformPatterns.java
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@ -443,6 +443,20 @@ package org.jooq.impl;

8
jOOQ/src/main/resources/org/jooq/xsd/jooq-runtime-3.17.0.xsd
View File

@ -330,6 +330,14 @@ This transformation removes any trivial predicates.
This feature is available in the commercial distribution only.]]></jxb:javadoc></jxb:property></appinfo></annotation>
</element>
<element name="transformPatternsEmptyScalarSubquery" type="boolean" minOccurs="0" maxOccurs="1" default="true">
<annotation><appinfo><jxb:property><jxb:javadoc><![CDATA[Transform empty scalar subqueries like <code>(SELECT 1 WHERE FALSE)</code> to <code>NULL</code>.
<p>
Scalar subqueries that are guaranteed to produce no results can be replaced by a <code>NULL</code> value.
<p>
This feature is available in the commercial distribution only.]]></jxb:javadoc></jxb:property></appinfo></annotation>
</element>
<element name="transformPatternsNegNeg" type="boolean" minOccurs="0" maxOccurs="1" default="true">
<annotation><appinfo><jxb:property><jxb:javadoc><![CDATA[Transform <code>-(-(x))</code> to <code>x</code>
<p>