apply spotless

Signed-off-by: xinyual <xinyual@amazon.com>

Author: xinyual

core/src/main/java/org/opensearch/sql/calcite/CalcitePlanContext.java

@@ -9,8 +9,8 @@
 
 import java.sql.Connection;
 import java.util.HashMap;
-import java.util.Map;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.Stack;
 import java.util.function.BiFunction;

core/src/main/java/org/opensearch/sql/calcite/CalciteRexNodeVisitor.java

@@ -9,30 +9,25 @@
 import static org.apache.calcite.sql.SqlKind.AS;
 import static org.opensearch.sql.ast.expression.SpanUnit.NONE;
 import static org.opensearch.sql.ast.expression.SpanUnit.UNKNOWN;
-import static org.opensearch.sql.calcite.utils.BuiltinFunctionUtils.VARCHAR_FORCE_NULLABLE;
 import static org.opensearch.sql.calcite.utils.OpenSearchTypeFactory.TYPE_FACTORY;
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
-
-import java.math.BigDecimal;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.apache.calcite.rel.RelNode;
 import org.apache.calcite.rel.type.RelDataType;
 import org.apache.calcite.rel.type.RelDataTypeFactory;
 import org.apache.calcite.rex.RexBuilder;
-import org.apache.calcite.rex.RexLambdaRef;
 import org.apache.calcite.rex.RexCall;
+import org.apache.calcite.rex.RexLambdaRef;
 import org.apache.calcite.rex.RexNode;
 import org.apache.calcite.sql.SqlIntervalQualifier;
 import org.apache.calcite.sql.fun.SqlStdOperatorTable;

core/src/main/java/org/opensearch/sql/expression/function/PPLBuiltinOperators.java

@@ -23,15 +23,15 @@
 import org.apache.calcite.sql.type.SqlTypeTransforms;
 import org.apache.calcite.sql.util.ReflectiveSqlOperatorTable;
 import org.apache.calcite.util.BuiltInMethod;
+import org.opensearch.sql.calcite.utils.PPLReturnTypes;
+import org.opensearch.sql.data.type.ExprCoreType;
+import org.opensearch.sql.expression.datetime.DateTimeFunctions;
 import org.opensearch.sql.expression.function.CollectionUDF.ArrayFunctionImpl;
 import org.opensearch.sql.expression.function.CollectionUDF.ExistsFunctionImpl;
 import org.opensearch.sql.expression.function.CollectionUDF.FilterFunctionImpl;
 import org.opensearch.sql.expression.function.CollectionUDF.ForallFunctionImpl;
 import org.opensearch.sql.expression.function.CollectionUDF.ReduceFunctionImpl;
 import org.opensearch.sql.expression.function.CollectionUDF.TransformFunctionImpl;
-import org.opensearch.sql.calcite.utils.PPLReturnTypes;
-import org.opensearch.sql.data.type.ExprCoreType;
-import org.opensearch.sql.expression.datetime.DateTimeFunctions;
 import org.opensearch.sql.expression.function.udf.CryptographicFunction;
 import org.opensearch.sql.expression.function.udf.datetime.AddSubDateFunction;
 import org.opensearch.sql.expression.function.udf.datetime.CurrentFunction;