Enable table function

Signed-off-by: Vamsi Manohar <[email protected]>

Author: vamsimanohar

ppl/src/main/java/org/opensearch/sql/ppl/parser/AstBuilder.java

@@ -21,6 +21,7 @@
 import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.SortCommandContext;
 import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.StatsCommandContext;
 import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.TableSourceClauseContext;
+import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.TableFunctionContext;
 import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.TopCommandContext;
 import static org.opensearch.sql.ppl.antlr.parser.OpenSearchPPLParser.WhereCommandContext;
 import static org.opensearch.sql.utils.SystemIndexUtils.DATASOURCES_TABLE_NAME;
@@ -33,7 +34,6 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
-import lombok.Generated;
 import lombok.RequiredArgsConstructor;
 import org.antlr.v4.runtime.ParserRuleContext;
 import org.antlr.v4.runtime.Token;
@@ -363,7 +363,7 @@ public UnresolvedPlan visitTableSourceClause(TableSourceClauseContext ctx) {
   }
 
   @Override
-  public UnresolvedPlan visitTableFunction(OpenSearchPPLParser.TableFunctionContext ctx) {
+  public UnresolvedPlan visitTableFunction(TableFunctionContext ctx) {
     ImmutableList.Builder<UnresolvedExpression> builder = ImmutableList.builder();
     ctx.functionArgs().functionArg().forEach(arg
         -> {

ppl/src/main/java/org/opensearch/sql/ppl/parser/AstExpressionBuilder.java

@@ -6,7 +6,6 @@
 
 package org.opensearch.sql.ppl.parser;
 
-import static org.opensearch.sql.ast.dsl.AstDSL.qualifiedName;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.IS_NOT_NULL;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.IS_NULL;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.POSITION;