Adding pre tag to javadocs that need to maintain old formatting.

Author: MitchellGale

core/src/main/java/org/opensearch/sql/analysis/ExpressionReferenceOptimizer.java

@@ -25,12 +25,19 @@
 import org.opensearch.sql.planner.logical.LogicalWindow;
 
 /**
- * The optimizer used to replace the expression referred in the SelectClause e.g. The query SELECT
- * abs(name), sum(age)-avg(age) FROM test GROUP BY abs(name). will be translated the AST
- * Project[abs(age), sub(sum(age), avg(age)) Agg(agg=[sum(age), avg(age)], group=[abs(age)]]
- * Relation The sum(age) and avg(age) in the Project could be replace by the analyzed reference, the
- * LogicalPlan should be LogicalProject[Ref("abs(age)"), sub(Ref("sum(age)"), Ref("avg(age)"))
- * LogicalAgg(agg=[sum(age), avg(age)], group=[abs(age)]] LogicalRelation
+ * <pre>
+ * The optimizer used to replace the expression referred in the SelectClause
+ * e.g. The query SELECT abs(name), sum(age)-avg(age) FROM test GROUP BY abs(name).
+ * will be translated the AST
+ * Project[abs(age), sub(sum(age), avg(age))
+ *  Agg(agg=[sum(age), avg(age)], group=[abs(age)]]
+ *   Relation
+ * The sum(age) and avg(age) in the Project could be replace by the analyzed reference, the
+ * LogicalPlan should be
+ * LogicalProject[Ref("abs(age)"), sub(Ref("sum(age)"), Ref("avg(age)"))
+ *  LogicalAgg(agg=[sum(age), avg(age)], group=[abs(age)]]
+ *   LogicalRelation
+ * </pre>
  */
 public class ExpressionReferenceOptimizer
     extends ExpressionNodeVisitor<Expression, AnalysisContext> {

core/src/main/java/org/opensearch/sql/analysis/SelectExpressionAnalyzer.java

@@ -70,12 +70,18 @@ public List<NamedExpression> visitAlias(Alias node, AnalysisContext context) {
   }
 
   /**
-   * The Alias could be 1. SELECT name, AVG(age) FROM s BY name -> Project(Alias("name", expr),
-   * Alias("AVG(age)", aggExpr)) Agg(Alias("AVG(age)", aggExpr)) 2. SELECT length(name), AVG(age)
-   * FROM s BY length(name) Project(Alias("name", expr), Alias("AVG(age)", aggExpr))
-   * Agg(Alias("AVG(age)", aggExpr)) 3. SELECT length(name) as l, AVG(age) FROM s BY l
-   * Project(Alias("name", expr, l), Alias("AVG(age)", aggExpr)) Agg(Alias("AVG(age)", aggExpr),
-   * Alias("length(name)", groupExpr))
+   * <pre>
+   * The Alias could be
+   * 1. SELECT name, AVG(age) FROM s BY name ->
+   * Project(Alias("name", expr), Alias("AVG(age)", aggExpr))
+   * Agg(Alias("AVG(age)", aggExpr))
+   * 2. SELECT length(name), AVG(age) FROM s BY length(name)
+   * Project(Alias("name", expr), Alias("AVG(age)", aggExpr))
+   * Agg(Alias("AVG(age)", aggExpr))
+   * 3. SELECT length(name) as l, AVG(age) FROM s BY l
+   * Project(Alias("name", expr, l), Alias("AVG(age)", aggExpr))
+   * Agg(Alias("AVG(age)", aggExpr), Alias("length(name)", groupExpr))
+   * </pre>
    */
   private Expression referenceIfSymbolDefined(Alias expr, AnalysisContext context) {
     UnresolvedExpression delegatedExpr = expr.getDelegated();

core/src/main/java/org/opensearch/sql/ast/dsl/AstDSL.java

@@ -247,8 +247,13 @@ public static Function function(String funcName, UnresolvedExpression... funcArg
   }
 
   /**
-   * CASE WHEN search_condition THEN result_expr [WHEN search_condition THEN result_expr] ... [ELSE
-   * result_expr] END
+   * <pre>
+   * CASE
+   *     WHEN search_condition THEN result_expr
+   *     [WHEN search_condition THEN result_expr] ...
+   *     [ELSE result_expr]
+   * END
+   * </pre>
    */
   public UnresolvedExpression caseWhen(UnresolvedExpression elseClause, When... whenClauses) {
     return caseWhen(null, elseClause, whenClauses);

core/src/main/java/org/opensearch/sql/data/type/WideningTypeRule.java

@@ -11,9 +11,18 @@
 import org.opensearch.sql.exception.ExpressionEvaluationException;
 
 /**
- * The definition of widening type rule for expression value. ExprType Widens to data types INTEGER
- * LONG, FLOAT, DOUBLE LONG FLOAT, DOUBLE FLOAT DOUBLE DOUBLE DOUBLE STRING STRING BOOLEAN BOOLEAN
- * ARRAY ARRAY STRUCT STRUCT
+ * <pre>
+ * The definition of widening type rule for expression value.
+ * ExprType     Widens to data types
+ * INTEGER      LONG, FLOAT, DOUBLE
+ * LONG         FLOAT, DOUBLE
+ * FLOAT        DOUBLE
+ * DOUBLE       DOUBLE
+ * STRING       STRING
+ * BOOLEAN      BOOLEAN
+ * ARRAY        ARRAY
+ * STRUCT       STRUCT
+ * </pre>
  */
 @UtilityClass
 public class WideningTypeRule {