Jackie-Jiang commented on a change in pull request #4216: PQL -> SQL
enhancement - phase 1 - new Pinot Query Struct
URL: https://github.com/apache/incubator-pinot/pull/4216#discussion_r292689276
##########
File path:
pinot-common/src/main/java/org/apache/pinot/pql/parsers/pql2/ast/ComparisonPredicateAstNode.java
##########
@@ -155,6 +157,74 @@ public FilterQueryTree buildFilterQueryTree() {
}
}
+ @Override
+ public Expression buildFilterExpression() {
+ if (_identifier == null) {
+ throw new Pql2CompilationException("Comparison predicate has no
identifier");
+ }
+
+ if ("=".equals(_operand)) {
+ if (_identifier != null && _literal != null) {
+ Expression expr =
RequestUtils.createFunctionExpression(FilterKind.EQUALS.name());
+
expr.getFunctionCall().addToOperands(RequestUtils.createIdentifierExpression(_identifier));
+
expr.getFunctionCall().addToOperands(RequestUtils.createLiteralExpression(_literal));
+ return expr;
+ } else {
+ throw new Pql2CompilationException("Comparison is not between a column
and a constant");
+ }
+ } else if ("<>".equals(_operand) || "!=".equals(_operand)) {
+ if (_identifier != null && _literal != null) {
+ Expression expr =
RequestUtils.createFunctionExpression(FilterKind.NOT_EQUALS.name());
+
expr.getFunctionCall().addToOperands(RequestUtils.createIdentifierExpression(_identifier));
+
expr.getFunctionCall().addToOperands(RequestUtils.createLiteralExpression(_literal));
+ return expr;
+ } else {
+ throw new Pql2CompilationException("Comparison is not between a column
and a constant");
+ }
+ } else {
+ if (_identifier != null) {
+ boolean identifierIsOnLeft = true;
Review comment:
We add support to `1 < column`? Do we support this right now?
Also, how about function in comparison?
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