fix problems with unaliased tables on Informix

Author: gavinking

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java

@@ -24,6 +24,7 @@
 import org.hibernate.community.dialect.unique.InformixUniqueDelegate;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.NullOrdering;
 import org.hibernate.dialect.Replacer;
 import org.hibernate.dialect.SelectItemReferenceStrategy;
@@ -1083,4 +1084,9 @@ public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, @
 		}
 		return super.buildIdentifierHelper( builder, metadata );
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixSqlAstTranslator.java

@@ -23,6 +23,7 @@
 import org.hibernate.sql.ast.tree.expression.SelfRenderingExpression;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
 import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
@@ -342,4 +343,12 @@ public void visitBinaryArithmeticExpression(BinaryArithmeticExpression arithmeti
 		}
 		super.visitBinaryArithmeticExpression( arithmeticExpression );
 	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
 }