kanha-gupta commented on code in PR #25424:
URL: https://github.com/apache/shardingsphere/pull/25424#discussion_r1185733719
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sql-parser/dialect/mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/statement/MySQLStatementVisitor.java:
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@@ -441,7 +446,9 @@ public final ASTNode visitBooleanPrimary(final
BooleanPrimaryContext ctx) {
ExpressionSegment right = new
LiteralExpressionSegment(ctx.IS().getSymbol().getStopIndex() + 2,
ctx.stop.getStopIndex(), rightText);
String text = ctx.start.getInputStream().getText(new
Interval(ctx.start.getStartIndex(), ctx.stop.getStopIndex()));
ExpressionSegment left = (ExpressionSegment)
visit(ctx.booleanPrimary());
- String operator = "IS";
+ if (null != ctx.NULL()) {
+ right = null;
Review Comment:
@strongduanmu Sir, I tried it. The problem I am encountering is that
Calcite's SqlStdOperatorTable do not have "IS" as a function or
PostFixOperator. Therefore While breaking "IS NULL" into "IS" as operator &
"NULL" in right as LiteralExpressionSegment, It gives error "IS" is not
supported.
Same problem is for "IS NOT NULL" as SqlStdOperatorTable doesnt support "IS
NOT"
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