static void updateAliasMap(ASTNode root, CubeQueryContext cubeql) {
if (root == null) {
return;
}
if (root.getToken().getType() == TOK_SELEXPR) {
ASTNode alias = HQLParser.findNodeByPath(root, Identifier);
if (alias != null) {
cubeql.addExprToAlias(root, alias);
}
} else {
for (int i = 0; i < root.getChildCount(); i++) {
updateAliasMap((ASTNode) root.getChild(i), cubeql);
}
}
}
boolean isCubeMeasure(ASTNode node) {
String tabname = null;
String colname;
int nodeType = node.getToken().getType();
if (!(nodeType == HiveParser.TOK_TABLE_OR_COL || nodeType == HiveParser.DOT)) {
return false;
}
if (nodeType == HiveParser.TOK_TABLE_OR_COL) {
colname = ((ASTNode) node.getChild(0)).getText();
} else {
// node in 'alias.column' format
ASTNode tabident = HQLParser.findNodeByPath(node, TOK_TABLE_OR_COL, Identifier);
ASTNode colIdent = (ASTNode) node.getChild(1);
colname = colIdent.getText();
tabname = tabident.getText();
}
String msrname = StringUtils.isBlank(tabname) ? colname : tabname + "." + colname;
return isCubeMeasure(msrname);
}
private void resolveClause(CubeQueryContext query, ASTNode node) throws LensException {
if (node == null) {
return;
}
int nodeType = node.getToken().getType();
if (nodeType == HiveParser.DOT) {
String colName = HQLParser.getColName(node).toLowerCase();
if (!pickedReferences.containsKey(colName)) {
return;
}
// No need to create a new node,
// replace the table name identifier and column name identifier
ASTNode tableNode = (ASTNode) node.getChild(0);
ASTNode tabident = HQLParser.findNodeByPath(node, TOK_TABLE_OR_COL, Identifier);
PickedReference refered = getPickedReference(colName, tabident.getText().toLowerCase());
if (refered == null) {
return;
}
ASTNode newTableNode =
new ASTNode(
new CommonToken(HiveParser.Identifier, refered.getChainRef().getChainName()));
tableNode.setChild(0, newTableNode);
ASTNode newColumnNode =
new ASTNode(
new CommonToken(HiveParser.Identifier, refered.getChainRef().getRefColumn()));
node.setChild(1, newColumnNode);
} else {
// recurse down
for (int i = 0; i < node.getChildCount(); i++) {
ASTNode child = (ASTNode) node.getChild(i);
resolveClause(query, child);
}
}
}
