diff --git a/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/BaseRule.g4 b/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/BaseRule.g4
index 539dd685a1b14..1df5aca695065 100644
--- a/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/BaseRule.g4
+++ b/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/BaseRule.g4
@@ -301,6 +301,7 @@ orderByItem
 
 dataType
     : dataTypeName dataTypeLength? characterSet? collateClause? | dataTypeName LP_ STRING_ (COMMA_ STRING_)* RP_ characterSet? collateClause?
+    | (SMALLINT | INTEGER | BIGINT) LBT_ arrayDimension RBT_
     ;
 
 dataTypeName
@@ -329,3 +330,8 @@ ignoredIdentifier
 dropBehaviour
     : (CASCADE | RESTRICT)?
     ;
+
+arrayDimension
+    : LBT_ ((NUMBER_ COLON_)? NUMBER_ RBT_) (COMMA_ LBT_ ((NUMBER_ COLON_)? NUMBER_ RBT_))*
+    | NUMBER_ (COMMA_ NUMBER_)*
+    ;
\ No newline at end of file
diff --git a/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/FirebirdKeyword.g4 b/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/FirebirdKeyword.g4
index 88999220b97a5..723529ccdbf3b 100644
--- a/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/FirebirdKeyword.g4
+++ b/parser/sql/dialect/firebird/src/main/antlr4/imports/firebird/FirebirdKeyword.g4
@@ -711,6 +711,9 @@ ROW
     : R O W
     ;
 
+BIGINT
+    : B I G I N T
+    ;
 
 //PASSWORD
 //    : P A S S W O R D