kasakrisz commented on code in PR #5267:
URL: https://github.com/apache/hive/pull/5267#discussion_r1620072587
##########
ql/src/java/org/apache/hadoop/hive/ql/parse/MergeSemanticAnalyzer.java:
##########
@@ -350,26 +352,51 @@ private MergeStatement.InsertClause handleInsert(ASTNode
whenNotMatchedClause, S
throw new SemanticException(String.format("Column schema must have the
same length as values (%d vs %d)",
columnListNode.getChildCount(), valuesNode.getChildCount() - 1));
}
- UnparseTranslator defaultValuesTranslator = new UnparseTranslator(conf);
- defaultValuesTranslator.enable();
- List<String> targetSchema = processTableColumnNames(columnListNode,
targetTable.getFullyQualifiedName());
- collectDefaultValues(valuesNode, targetTable, targetSchema,
defaultValuesTranslator);
- defaultValuesTranslator.applyTranslations(ctx.getTokenRewriteStream());
- String valuesClause = getMatchedText(valuesNode);
- valuesClause = valuesClause.substring(1, valuesClause.length() - 1);
//strip '(' and ')'
- String extraPredicate = getWhenClausePredicate(whenNotMatchedClause);
- return new MergeStatement.InsertClause(
- getMatchedText(columnListNode), valuesClause, onClausePredicate,
extraPredicate);
- }
+ List<String> columnNames;
+ if (columnListNode != null) {
+ columnNames = new ArrayList<>(valuesNode.getChildCount());
+ for (int i = 0; i < columnListNode.getChildCount(); ++i) {
+ ASTNode columnNameNode = (ASTNode) columnListNode.getChild(i);
+ String columnName =
ctx.getTokenRewriteStream().toString(columnNameNode.getTokenStartIndex(),
+ columnNameNode.getTokenStopIndex()).trim();
+ columnNames.add(columnName);
+ }
+ } else {
+ columnNames = null;
Review Comment:
When column names are specified additional steps must be done in both
Rewriter implementations so the null check is required. If the lack of column
names is represented by an empty list `List.isEmpty()` would be used.
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