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hibernate-orm
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HHH-15462 Optimize ColumnReference rendering and reduce buffering

This commit is contained in:
Christian Beikov 2022-08-23 14:47:31 +02:00
parent 271cba0603
commit aa311855d9
1 changed files with 34 additions and 26 deletions
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58
hibernate-core/src/main/java/org/hibernate/sql/ast/tree/expression/ColumnReference.java
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@ -9,6 +9,7 @@ package org.hibernate.sql.ast.tree.expression;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.function.Consumer;
import org.hibernate.engine.spi.SessionFactoryImplementor;
@ -19,6 +20,7 @@ import org.hibernate.metamodel.mapping.MappingModelExpressible;
import org.hibernate.sql.Template;
import org.hibernate.sql.ast.SqlAstWalker;
import org.hibernate.sql.ast.spi.SqlAppender;
import org.hibernate.sql.ast.spi.StringBuilderSqlAppender;
import org.hibernate.sql.ast.tree.from.TableReference;
import org.hibernate.sql.ast.tree.update.Assignable;
@ -88,23 +90,7 @@ public class ColumnReference implements Expression, Assignable {
}
this.isFormula = isFormula;
if ( isFormula ) {
this.readExpression = this.columnExpression;
}
else if ( customReadExpression != null ) {
if ( this.qualifier == null ) {
this.readExpression = StringHelper.replace( customReadExpression, Template.TEMPLATE + ".", "" );
}
else {
this.readExpression = StringHelper.replace( customReadExpression, Template.TEMPLATE, qualifier );
}
}
else {
this.readExpression = this.qualifier == null
? this.columnExpression
: this.qualifier + "." + this.columnExpression;
}
this.readExpression = customReadExpression;
if ( isFormula ) {
this.writeExpression = null;
@ -188,15 +174,30 @@ public class ColumnReference implements Expression, Assignable {
}
public String getExpressionText() {
return readExpression;
final StringBuilder sb = new StringBuilder();
appendReadExpression( new StringBuilderSqlAppender( sb ) );
return sb.toString();
}
public void appendReadExpression(SqlAppender appender) {
appender.append( getExpressionText() );
if ( isFormula ) {
appender.append( columnExpression );
}
else if ( readExpression != null ) {
if ( qualifier == null ) {
appender.append( StringHelper.replace( readExpression, Template.TEMPLATE + ".", "" ) );
}
else {
appender.append( StringHelper.replace( readExpression, Template.TEMPLATE, qualifier ) );
}
}
else {
if ( qualifier != null ) {
appender.append( qualifier );
appender.append( '.' );
}
appender.append( columnExpression );
}
public String renderSqlFragment(SessionFactoryImplementor sessionFactory) {
return getExpressionText();
}
public JdbcMapping getJdbcMapping() {
@ -219,7 +220,7 @@ public class ColumnReference implements Expression, Assignable {
Locale.ROOT,
"%s(%s)",
getClass().getSimpleName(),
readExpression
getExpressionText()
);
}
@ -233,12 +234,19 @@ public class ColumnReference implements Expression, Assignable {
}
final ColumnReference that = (ColumnReference) o;
return readExpression.equals( that.readExpression );
return isFormula == that.isFormula
&& Objects.equals( qualifier, that.qualifier )
&& Objects.equals( columnExpression, that.columnExpression )
&& Objects.equals( readExpression, that.readExpression );
}
@Override
public int hashCode() {
return readExpression.hashCode();
int result = qualifier != null ? qualifier.hashCode() : 0;
result = 31 * result + ( columnExpression != null ? columnExpression.hashCode() : 0 );
result = 31 * result + ( isFormula ? 1 : 0 );
result = 31 * result + ( readExpression != null ? readExpression.hashCode() : 0 );
return result;
}
@Override