diff --git a/src/trino/coalesce_impl.rs b/src/trino/coalesce_impl.rs
index 1327c78..f180839 100644
--- a/src/trino/coalesce_impl.rs
+++ b/src/trino/coalesce_impl.rs
@@ -55,7 +55,7 @@ pub(super) struct coalesce_1Func {
 impl coalesce_1Func {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
diff --git a/src/trino/concat_impl.rs b/src/trino/concat_impl.rs
index d9900de..ac7c11c 100644
--- a/src/trino/concat_impl.rs
+++ b/src/trino/concat_impl.rs
@@ -211,7 +211,7 @@ pub(super) struct concat_array_3Func {
 impl concat_array_3Func {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
@@ -325,7 +325,7 @@ pub(super) struct concat_varcharFunc {
 impl concat_varcharFunc {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
@@ -363,7 +363,7 @@ pub(super) struct concat_varbinaryFunc {
 impl concat_varbinaryFunc {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
diff --git a/src/trino/concat_ws_impl.rs b/src/trino/concat_ws_impl.rs
index 579f984..8d18278 100644
--- a/src/trino/concat_ws_impl.rs
+++ b/src/trino/concat_ws_impl.rs
@@ -119,7 +119,7 @@ pub(super) struct concat_ws_varcharFunc {
 impl concat_ws_varcharFunc {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
diff --git a/src/trino/greatest_impl.rs b/src/trino/greatest_impl.rs
index c9cbd7e..a46562f 100644
--- a/src/trino/greatest_impl.rs
+++ b/src/trino/greatest_impl.rs
@@ -62,7 +62,7 @@ pub(super) struct greatest_3Func {
 impl greatest_3Func {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
diff --git a/src/trino/least_impl.rs b/src/trino/least_impl.rs
index 04576f4..bab0d16 100644
--- a/src/trino/least_impl.rs
+++ b/src/trino/least_impl.rs
@@ -62,7 +62,7 @@ pub(super) struct least_3Func {
 impl least_3Func {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }
diff --git a/src/trino/map_concat_impl.rs b/src/trino/map_concat_impl.rs
index f35b65b..cf01c01 100644
--- a/src/trino/map_concat_impl.rs
+++ b/src/trino/map_concat_impl.rs
@@ -58,7 +58,7 @@ pub(super) struct map_concat_map_4_5Func {
 impl map_concat_map_4_5Func {
     pub fn new() -> Self {
         Self {
-            signature: Signature::variadic_equal(Volatility::Immutable),
+            signature: Signature::variadic_any(Volatility::Immutable),
         }
     }
 }