ramitg254 commented on code in PR #6413:
URL: https://github.com/apache/hive/pull/6413#discussion_r3388178245
##########
ql/src/java/org/apache/hadoop/hive/ql/parse/rewrite/SplitUpdateRewriter.java:
##########
@@ -134,4 +114,47 @@ public ParseUtils.ReparseResult rewrite(Context context,
UpdateStatement updateB
return rr;
}
+
+ private void appendUpdateColumn(UpdateStatement updateBlock,
+ MultiInsertSqlGenerator sqlGenerator, List<String> insertValues,
+ Map<Integer, ASTNode> setColExprs, String columnName, int
setColExprIndex, int columnOffset,
+ boolean appendToSelect, boolean prependComma) {
+ if (appendToSelect && prependComma) {
+ sqlGenerator.append(",");
+ }
+
+ Table targetTable = updateBlock.getTargetTable();
+ ASTNode setCol = updateBlock.getSetCols().get(columnName);
+ String identifier = HiveUtils.unparseIdentifier(columnName, conf);
+
+ if (appendToSelect) {
+ if (setCol != null) {
+ if (setCol.getType() == HiveParser.TOK_TABLE_OR_COL &&
+ setCol.getChildCount() == 1 && setCol.getChild(0).getType() ==
HiveParser.TOK_DEFAULT_VALUE) {
+
sqlGenerator.append(updateBlock.getColNameToDefaultConstraint().get(columnName));
+ } else {
+ sqlGenerator.append(identifier);
+ // This is one of the columns we're setting, record it's position so
we can come back
+ // later and patch it up. 0th is ROW_ID
+ setColExprs.put(setColExprIndex + columnOffset, setCol);
+ }
+ } else {
+ sqlGenerator.append(identifier);
+ }
+ sqlGenerator.append(" AS ");
+ sqlGenerator.append(identifier);
+ }
+
+ int index = targetTable.getColumnIndexByName(columnName);
+ ensureInsertValuesSize(insertValues, index);
+ insertValues.set(index, sqlGenerator.qualify(identifier));
+ }
+
+ private static void ensureInsertValuesSize(List<String> insertValues, int
index) {
Review Comment:
done
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