throw new SemanticException(ErrorMsg.INVALID_TABLE_ALIAS.getMsg(child));
}
for (Map.Entry<String, ColumnInfo> colMap : columns.entrySet()) {
ColumnInfo colInfo = colMap.getValue();
if (!colInfo.getIsVirtualCol()) {
columnList.addColumn(new ExprNodeColumnDesc(colInfo.getType(),
colInfo.getInternalName(), colInfo.getTabAlias(), false));
}
}
} else {
// all columns (select *, for example)
for (ColumnInfo colInfo : input.getColumnInfos()) {
if (!colInfo.getIsVirtualCol()) {
columnList.addColumn(new ExprNodeColumnDesc(colInfo.getType(),
colInfo.getInternalName(), colInfo.getTabAlias(), false));
}
}
}
return columnList;
}
// If the first child is a TOK_TABLE_OR_COL, and nodeOutput[0] is NULL,
// and the operator is a DOT, then it's a table column reference.
if (expr.getType() == HiveParser.DOT
&& expr.getChild(0).getType() == HiveParser.TOK_TABLE_OR_COL
&& nodeOutputs[0] == null) {
RowResolver input = ctx.getInputRR();
String tableAlias = BaseSemanticAnalyzer.unescapeIdentifier(expr
.getChild(0).getChild(0).getText());
// NOTE: tableAlias must be a valid non-ambiguous table alias,
// because we've checked that in TOK_TABLE_OR_COL's process method.
ColumnInfo colInfo = input.get(tableAlias,
((ExprNodeConstantDesc) nodeOutputs[1]).getValue().toString());
if (colInfo == null) {
ctx.setError(ErrorMsg.INVALID_COLUMN.getMsg(expr.getChild(1)), expr);
return null;
}
return new ExprNodeColumnDesc(colInfo.getType(), colInfo
.getInternalName(), colInfo.getTabAlias(), colInfo
.getIsVirtualCol());
}
// Return nulls for conversion operators
if (conversionFunctionTextHashMap.keySet().contains(expr.getType())
|| specialFunctionTextHashMap.keySet().contains(expr.getType())
|| expr.getToken().getType() == HiveParser.CharSetName
|| expr.getToken().getType() == HiveParser.CharSetLiteral) {
return null;
}
boolean isFunction = (expr.getType() == HiveParser.TOK_FUNCTION ||
expr.getType() == HiveParser.TOK_FUNCTIONSTAR ||
expr.getType() == HiveParser.TOK_FUNCTIONDI);
// Create all children
int childrenBegin = (isFunction ? 1 : 0);
ArrayList<ExprNodeDesc> children = new ArrayList<ExprNodeDesc>(expr
.getChildCount()
- childrenBegin);
for (int ci = childrenBegin; ci < expr.getChildCount(); ci++) {
if (nodeOutputs[ci] instanceof ExprNodeColumnListDesc) {
children.addAll(((ExprNodeColumnListDesc)nodeOutputs[ci]).getChildren());
} else {
children.add((ExprNodeDesc) nodeOutputs[ci]);
}
}
if (expr.getType() == HiveParser.TOK_FUNCTIONSTAR) {
RowResolver input = ctx.getInputRR();
for (ColumnInfo colInfo : input.getColumnInfos()) {
if (!colInfo.getIsVirtualCol()) {
children.add(new ExprNodeColumnDesc(colInfo.getType(),
colInfo.getInternalName(), colInfo.getTabAlias(), false));
}
}
}