diff --git a/ppl/src/main/antlr/OpenSearchPPLLexer.g4 b/ppl/src/main/antlr/OpenSearchPPLLexer.g4
index c16d15c30b8..e51ec177e4b 100644
--- a/ppl/src/main/antlr/OpenSearchPPLLexer.g4
+++ b/ppl/src/main/antlr/OpenSearchPPLLexer.g4
@@ -215,6 +215,7 @@ YEAR_MONTH:                         'YEAR_MONTH';
 
 // DATASET TYPES
 LOOKUP:                             'LOOKUP';
+INPUTLOOKUP:                        'INPUTLOOKUP';
 
 // CONVERTED DATA TYPES
 INT:                                'INT';
diff --git a/ppl/src/main/antlr/OpenSearchPPLParser.g4 b/ppl/src/main/antlr/OpenSearchPPLParser.g4
index 5ad1c38b01b..f5172a7a2e6 100644
--- a/ppl/src/main/antlr/OpenSearchPPLParser.g4
+++ b/ppl/src/main/antlr/OpenSearchPPLParser.g4
@@ -623,8 +623,10 @@ addcoltotalsOption
 fromClause
    : SOURCE EQUAL tableOrSubqueryClause
    | INDEX EQUAL tableOrSubqueryClause
+   | INPUTLOOKUP tableOrSubqueryClause
    | SOURCE EQUAL tableFunction
    | INDEX EQUAL tableFunction
+   | INPUTLOOKUP tableFunction
    | SOURCE EQUAL dynamicSourceClause
    | INDEX EQUAL dynamicSourceClause
    ;