diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnAnd.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnAnd.kt
index 98a766abf6..3064c48589 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnAnd.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnAnd.kt
@@ -7,10 +7,13 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.BoolValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.BOOL
 import org.partiql.value.PartiQLValueType.MISSING
+import org.partiql.value.boolValue
+import org.partiql.value.check
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_AND__BOOL_BOOL__BOOL : PartiQLFunction.Scalar {
@@ -27,7 +30,14 @@ internal object Fn_AND__BOOL_BOOL__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function and not implemented")
+        val lhs = args[0].check<BoolValue>().value
+        val rhs = args[1].check<BoolValue>().value
+        val toReturn = when {
+            lhs == false || rhs == false -> false
+            lhs == null || rhs == null -> null
+            else -> true
+        }
+        return boolValue(toReturn)
     }
 }
 
@@ -46,7 +56,11 @@ internal object Fn_AND__MISSING_BOOL__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function and not implemented")
+        val rhs = args[1].check<BoolValue>().value
+        return when (rhs) {
+            false -> boolValue(false)
+            else -> boolValue(null)
+        }
     }
 }
 
@@ -65,7 +79,11 @@ internal object Fn_AND__BOOL_MISSING__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function and not implemented")
+        val lhs = args[0].check<BoolValue>().value
+        return when (lhs) {
+            false -> boolValue(false)
+            else -> boolValue(null)
+        }
     }
 }
 
@@ -84,6 +102,6 @@ internal object Fn_AND__MISSING_MISSING__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function and not implemented")
+        return boolValue(null)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnBitwiseAnd.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnBitwiseAnd.kt
index e3e49f58ac..c066a6ca92 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnBitwiseAnd.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnBitwiseAnd.kt
@@ -7,6 +7,11 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.INT
@@ -14,6 +19,13 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
+import kotlin.experimental.and
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_BITWISE_AND__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -29,8 +41,10 @@ internal object Fn_BITWISE_AND__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function bitwise_and not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value(arg0 and arg1)
     }
 }
 
@@ -48,8 +62,10 @@ internal object Fn_BITWISE_AND__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function bitwise_and not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value(arg0 and arg1)
     }
 }
 
@@ -67,8 +83,10 @@ internal object Fn_BITWISE_AND__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function bitwise_and not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0 and arg1)
     }
 }
 
@@ -86,8 +104,10 @@ internal object Fn_BITWISE_AND__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function bitwise_and not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0 and arg1)
     }
 }
 
@@ -105,7 +125,9 @@ internal object Fn_BITWISE_AND__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function bitwise_and not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0 and arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnConcat.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnConcat.kt
index 87bfddb5a7..36b2543aac 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnConcat.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnConcat.kt
@@ -7,11 +7,18 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.ClobValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.CLOB
 import org.partiql.value.PartiQLValueType.STRING
 import org.partiql.value.PartiQLValueType.SYMBOL
+import org.partiql.value.StringValue
+import org.partiql.value.SymbolValue
+import org.partiql.value.check
+import org.partiql.value.clobValue
+import org.partiql.value.stringValue
+import org.partiql.value.symbolValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_CONCAT__STRING_STRING__STRING : PartiQLFunction.Scalar {
@@ -27,8 +34,11 @@ internal object Fn_CONCAT__STRING_STRING__STRING : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function concat not implemented")
+    override fun invoke(args: Array<PartiQLValue>): StringValue {
+
+        val arg0 = args[0].check<StringValue>().value!!
+        val arg1 = args[1].check<StringValue>().value!!
+        return stringValue(arg0 + arg1)
     }
 }
 
@@ -46,8 +56,12 @@ internal object Fn_CONCAT__SYMBOL_SYMBOL__SYMBOL : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function concat not implemented")
+    // TODO: We are still debating on whether symbol is a value. It looks like it may not be, and therefore, this
+    //  will be removed.
+    override fun invoke(args: Array<PartiQLValue>): SymbolValue {
+        val arg0 = args[0].check<SymbolValue>().value!!
+        val arg1 = args[1].check<SymbolValue>().value!!
+        return symbolValue(arg0 + arg1)
     }
 }
 
@@ -65,7 +79,9 @@ internal object Fn_CONCAT__CLOB_CLOB__CLOB : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function concat not implemented")
+    override fun invoke(args: Array<PartiQLValue>): ClobValue {
+        val arg0 = args[0].check<ClobValue>().value!!
+        val arg1 = args[1].check<ClobValue>().value!!
+        return clobValue(arg0 + arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnDivide.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnDivide.kt
index 325201b309..7431060ccd 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnDivide.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnDivide.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_DIVIDE__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -32,8 +49,10 @@ internal object Fn_DIVIDE__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value((arg0 / arg1).toByte())
     }
 }
 
@@ -51,8 +70,10 @@ internal object Fn_DIVIDE__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value((arg0 / arg1).toShort())
     }
 }
 
@@ -70,8 +91,10 @@ internal object Fn_DIVIDE__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0 / arg1)
     }
 }
 
@@ -89,8 +112,10 @@ internal object Fn_DIVIDE__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0 / arg1)
     }
 }
 
@@ -108,8 +133,10 @@ internal object Fn_DIVIDE__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0 / arg1)
     }
 }
 
@@ -127,8 +154,10 @@ internal object Fn_DIVIDE__DECIMAL_ARBITRARY_DECIMAL_ARBITRARY__DECIMAL_ARBITRAR
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val arg0 = args[0].check<DecimalValue>().value!!
+        val arg1 = args[1].check<DecimalValue>().value!!
+        return decimalValue(arg0 / arg1)
     }
 }
 
@@ -146,8 +175,10 @@ internal object Fn_DIVIDE__FLOAT32_FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val arg0 = args[0].check<Float32Value>().value!!
+        val arg1 = args[1].check<Float32Value>().value!!
+        return float32Value(arg0 / arg1)
     }
 }
 
@@ -165,7 +196,9 @@ internal object Fn_DIVIDE__FLOAT64_FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function divide not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val arg0 = args[0].check<Float64Value>().value!!
+        val arg1 = args[1].check<Float64Value>().value!!
+        return float64Value(arg0 / arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnMinus.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnMinus.kt
index 497f207ad2..de1df5129c 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnMinus.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnMinus.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_MINUS__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -32,8 +49,10 @@ internal object Fn_MINUS__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value((arg0 - arg1).toByte())
     }
 }
 
@@ -51,8 +70,10 @@ internal object Fn_MINUS__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value((arg0 - arg1).toShort())
     }
 }
 
@@ -70,8 +91,10 @@ internal object Fn_MINUS__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0 - arg1)
     }
 }
 
@@ -89,8 +112,10 @@ internal object Fn_MINUS__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0 - arg1)
     }
 }
 
@@ -108,8 +133,10 @@ internal object Fn_MINUS__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0 - arg1)
     }
 }
 
@@ -127,8 +154,10 @@ internal object Fn_MINUS__DECIMAL_ARBITRARY_DECIMAL_ARBITRARY__DECIMAL_ARBITRARY
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val arg0 = args[0].check<DecimalValue>().value!!
+        val arg1 = args[1].check<DecimalValue>().value!!
+        return decimalValue(arg0 - arg1)
     }
 }
 
@@ -146,8 +175,10 @@ internal object Fn_MINUS__FLOAT32_FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val arg0 = args[0].check<Float32Value>().value!!
+        val arg1 = args[1].check<Float32Value>().value!!
+        return float32Value(arg0 - arg1)
     }
 }
 
@@ -165,7 +196,9 @@ internal object Fn_MINUS__FLOAT64_FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function minus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val arg0 = args[0].check<Float64Value>().value!!
+        val arg1 = args[1].check<Float64Value>().value!!
+        return float64Value(arg0 - arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnModulo.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnModulo.kt
index b4ff8aa139..dfe59962e8 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnModulo.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnModulo.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_MODULO__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -32,8 +49,11 @@ internal object Fn_MODULO__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value((arg0 % arg1).toByte())
     }
 }
 
@@ -51,8 +71,11 @@ internal object Fn_MODULO__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value((arg0 % arg1).toShort())
     }
 }
 
@@ -70,8 +93,11 @@ internal object Fn_MODULO__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0 % arg1)
     }
 }
 
@@ -89,8 +115,11 @@ internal object Fn_MODULO__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0 % arg1)
     }
 }
 
@@ -108,8 +137,11 @@ internal object Fn_MODULO__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0 % arg1)
     }
 }
 
@@ -127,8 +159,11 @@ internal object Fn_MODULO__DECIMAL_ARBITRARY_DECIMAL_ARBITRARY__DECIMAL_ARBITRAR
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val arg0 = args[0].check<DecimalValue>().value!!
+        val arg1 = args[1].check<DecimalValue>().value!!
+        return decimalValue(arg0 % arg1)
     }
 }
 
@@ -146,8 +181,11 @@ internal object Fn_MODULO__FLOAT32_FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val arg0 = args[0].check<Float32Value>().value!!
+        val arg1 = args[1].check<Float32Value>().value!!
+        return float32Value(arg0 % arg1)
     }
 }
 
@@ -165,7 +203,10 @@ internal object Fn_MODULO__FLOAT64_FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function modulo not implemented")
+    // TODO: This is untested and may be wrong. Java's mod operation does not match SQL's.
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val arg0 = args[0].check<Float64Value>().value!!
+        val arg1 = args[1].check<Float64Value>().value!!
+        return float64Value(arg0 % arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNeg.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNeg.kt
index ae072fabde..d6a691d703 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNeg.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNeg.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_NEG__INT8__INT8 : PartiQLFunction.Scalar {
@@ -29,8 +46,9 @@ internal object Fn_NEG__INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val value = args[0].check<Int8Value>().value!!
+        return int8Value(value.times(-1).toByte())
     }
 }
 
@@ -45,8 +63,9 @@ internal object Fn_NEG__INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val value = args[0].check<Int16Value>().value!!
+        return int16Value(value.times(-1).toShort())
     }
 }
 
@@ -61,8 +80,9 @@ internal object Fn_NEG__INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val value = args[0].check<Int32Value>().value!!
+        return int32Value(value.times(-1))
     }
 }
 
@@ -77,8 +97,9 @@ internal object Fn_NEG__INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val value = args[0].check<Int64Value>().value!!
+        return int64Value(value.times(-1L))
     }
 }
 
@@ -93,8 +114,9 @@ internal object Fn_NEG__INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val value = args[0].check<IntValue>().value!!
+        return intValue(value.negate())
     }
 }
 
@@ -109,8 +131,9 @@ internal object Fn_NEG__DECIMAL_ARBITRARY__DECIMAL_ARBITRARY : PartiQLFunction.S
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val value = args[0].check<DecimalValue>().value!!
+        return decimalValue(value.negate())
     }
 }
 
@@ -125,8 +148,9 @@ internal object Fn_NEG__FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val value = args[0].check<Float32Value>().value!!
+        return float32Value(value.times(-1))
     }
 }
 
@@ -141,7 +165,8 @@ internal object Fn_NEG__FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function neg not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val value = args[0].check<Float64Value>().value!!
+        return float64Value(value.times(-1))
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNot.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNot.kt
index 9615880a50..3344ce6c9a 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNot.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnNot.kt
@@ -29,11 +29,7 @@ internal object Fn_NOT__BOOL__BOOL : PartiQLFunction.Scalar {
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
         val value = args[0].check<BoolValue>().value
-        return if (value == null) {
-            boolValue(null)
-        } else {
-            boolValue(!value)
-        }
+        return boolValue(value!!.not())
     }
 }
 
@@ -45,7 +41,7 @@ internal object Fn_NOT__MISSING__BOOL : PartiQLFunction.Scalar {
         returns = BOOL,
         parameters = listOf(FunctionParameter("value", MISSING)),
         isNullCall = true,
-        isNullable = false,
+        isNullable = true,
     )
 
     // TODO determine what this behavior should be
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnOr.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnOr.kt
index 08aaa72c39..4418d4a400 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnOr.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnOr.kt
@@ -7,10 +7,13 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.BoolValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.BOOL
 import org.partiql.value.PartiQLValueType.MISSING
+import org.partiql.value.boolValue
+import org.partiql.value.check
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_OR__BOOL_BOOL__BOOL : PartiQLFunction.Scalar {
@@ -26,8 +29,15 @@ internal object Fn_OR__BOOL_BOOL__BOOL : PartiQLFunction.Scalar {
         isNullable = true,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function or not implemented")
+    override fun invoke(args: Array<PartiQLValue>): BoolValue {
+        val lhs = args[0].check<BoolValue>().value
+        val rhs = args[1].check<BoolValue>().value
+        val toReturn = when {
+            lhs == true || rhs == true -> true
+            lhs == null || rhs == null -> null
+            else -> false
+        }
+        return boolValue(toReturn)
     }
 }
 
@@ -46,7 +56,11 @@ internal object Fn_OR__MISSING_BOOL__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function or not implemented")
+        val rhs = args[1].check<BoolValue>().value
+        return when (rhs) {
+            true -> boolValue(true)
+            else -> boolValue(null)
+        }
     }
 }
 
@@ -65,7 +79,11 @@ internal object Fn_OR__BOOL_MISSING__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function or not implemented")
+        val lhs = args[0].check<BoolValue>().value
+        return when (lhs) {
+            true -> boolValue(true)
+            else -> boolValue(null)
+        }
     }
 }
 
@@ -84,6 +102,6 @@ internal object Fn_OR__MISSING_MISSING__BOOL : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function or not implemented")
+        return boolValue(null)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPlus.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPlus.kt
index bd2dc156da..5d282b36da 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPlus.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPlus.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_PLUS__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -32,8 +49,10 @@ internal object Fn_PLUS__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value((arg0 + arg1).toByte())
     }
 }
 
@@ -51,8 +70,10 @@ internal object Fn_PLUS__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value((arg0 + arg1).toShort())
     }
 }
 
@@ -70,8 +91,10 @@ internal object Fn_PLUS__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0 + arg1)
     }
 }
 
@@ -89,8 +112,10 @@ internal object Fn_PLUS__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0 + arg1)
     }
 }
 
@@ -108,8 +133,10 @@ internal object Fn_PLUS__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0 + arg1)
     }
 }
 
@@ -127,8 +154,10 @@ internal object Fn_PLUS__DECIMAL_ARBITRARY_DECIMAL_ARBITRARY__DECIMAL_ARBITRARY
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val arg0 = args[0].check<DecimalValue>().value!!
+        val arg1 = args[1].check<DecimalValue>().value!!
+        return decimalValue(arg0 + arg1)
     }
 }
 
@@ -146,8 +175,10 @@ internal object Fn_PLUS__FLOAT32_FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val arg0 = args[0].check<Float32Value>().value!!
+        val arg1 = args[1].check<Float32Value>().value!!
+        return float32Value(arg0 + arg1)
     }
 }
 
@@ -165,7 +196,9 @@ internal object Fn_PLUS__FLOAT64_FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function plus not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val arg0 = args[0].check<Float64Value>().value!!
+        val arg1 = args[1].check<Float64Value>().value!!
+        return float64Value(arg0 + arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPos.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPos.kt
index df0df54663..8a5344d8cd 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPos.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnPos.kt
@@ -30,7 +30,7 @@ internal object Fn_POS__INT8__INT8 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -46,7 +46,7 @@ internal object Fn_POS__INT16__INT16 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -62,7 +62,7 @@ internal object Fn_POS__INT32__INT32 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -78,7 +78,7 @@ internal object Fn_POS__INT64__INT64 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -94,7 +94,7 @@ internal object Fn_POS__INT__INT : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -110,7 +110,7 @@ internal object Fn_POS__DECIMAL_ARBITRARY__DECIMAL_ARBITRARY : PartiQLFunction.S
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -126,7 +126,7 @@ internal object Fn_POS__FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
 
@@ -142,6 +142,6 @@ internal object Fn_POS__FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
     )
 
     override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function pos not implemented")
+        return args[0]
     }
 }
diff --git a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnTimes.kt b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnTimes.kt
index 589e98fb11..5d11700fb0 100644
--- a/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnTimes.kt
+++ b/plugins/partiql-plugin/src/main/kotlin/org/partiql/plugin/internal/fn/scalar/FnTimes.kt
@@ -7,6 +7,14 @@ import org.partiql.spi.function.PartiQLFunction
 import org.partiql.spi.function.PartiQLFunctionExperimental
 import org.partiql.types.function.FunctionParameter
 import org.partiql.types.function.FunctionSignature
+import org.partiql.value.DecimalValue
+import org.partiql.value.Float32Value
+import org.partiql.value.Float64Value
+import org.partiql.value.Int16Value
+import org.partiql.value.Int32Value
+import org.partiql.value.Int64Value
+import org.partiql.value.Int8Value
+import org.partiql.value.IntValue
 import org.partiql.value.PartiQLValue
 import org.partiql.value.PartiQLValueExperimental
 import org.partiql.value.PartiQLValueType.DECIMAL_ARBITRARY
@@ -17,6 +25,15 @@ import org.partiql.value.PartiQLValueType.INT16
 import org.partiql.value.PartiQLValueType.INT32
 import org.partiql.value.PartiQLValueType.INT64
 import org.partiql.value.PartiQLValueType.INT8
+import org.partiql.value.check
+import org.partiql.value.decimalValue
+import org.partiql.value.float32Value
+import org.partiql.value.float64Value
+import org.partiql.value.int16Value
+import org.partiql.value.int32Value
+import org.partiql.value.int64Value
+import org.partiql.value.int8Value
+import org.partiql.value.intValue
 
 @OptIn(PartiQLValueExperimental::class, PartiQLFunctionExperimental::class)
 internal object Fn_TIMES__INT8_INT8__INT8 : PartiQLFunction.Scalar {
@@ -32,8 +49,10 @@ internal object Fn_TIMES__INT8_INT8__INT8 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int8Value {
+        val arg0 = args[0].check<Int8Value>().value!!
+        val arg1 = args[1].check<Int8Value>().value!!
+        return int8Value((arg0 * arg1).toByte())
     }
 }
 
@@ -51,8 +70,10 @@ internal object Fn_TIMES__INT16_INT16__INT16 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int16Value {
+        val arg0 = args[0].check<Int16Value>().value!!
+        val arg1 = args[1].check<Int16Value>().value!!
+        return int16Value((arg0 * arg1).toShort())
     }
 }
 
@@ -70,8 +91,10 @@ internal object Fn_TIMES__INT32_INT32__INT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int32Value {
+        val arg0 = args[0].check<Int32Value>().value!!
+        val arg1 = args[1].check<Int32Value>().value!!
+        return int32Value(arg0.times(arg1))
     }
 }
 
@@ -89,8 +112,10 @@ internal object Fn_TIMES__INT64_INT64__INT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Int64Value {
+        val arg0 = args[0].check<Int64Value>().value!!
+        val arg1 = args[1].check<Int64Value>().value!!
+        return int64Value(arg0.times(arg1))
     }
 }
 
@@ -108,8 +133,10 @@ internal object Fn_TIMES__INT_INT__INT : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): IntValue {
+        val arg0 = args[0].check<IntValue>().value!!
+        val arg1 = args[1].check<IntValue>().value!!
+        return intValue(arg0.times(arg1))
     }
 }
 
@@ -127,8 +154,10 @@ internal object Fn_TIMES__DECIMAL_ARBITRARY_DECIMAL_ARBITRARY__DECIMAL_ARBITRARY
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): DecimalValue {
+        val arg0 = args[0].check<DecimalValue>().value!!
+        val arg1 = args[1].check<DecimalValue>().value!!
+        return decimalValue(arg0.times(arg1))
     }
 }
 
@@ -146,8 +175,10 @@ internal object Fn_TIMES__FLOAT32_FLOAT32__FLOAT32 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float32Value {
+        val arg0 = args[0].check<Float32Value>().value!!
+        val arg1 = args[1].check<Float32Value>().value!!
+        return float32Value(arg0 * arg1)
     }
 }
 
@@ -165,7 +196,9 @@ internal object Fn_TIMES__FLOAT64_FLOAT64__FLOAT64 : PartiQLFunction.Scalar {
         isNullable = false,
     )
 
-    override fun invoke(args: Array<PartiQLValue>): PartiQLValue {
-        TODO("Function times not implemented")
+    override fun invoke(args: Array<PartiQLValue>): Float64Value {
+        val arg0 = args[0].check<Float64Value>().value!!
+        val arg1 = args[1].check<Float64Value>().value!!
+        return float64Value(arg0 * arg1)
     }
 }
diff --git a/plugins/partiql-plugin/src/test/kotlin/org/partiql/plugin/PartiQLHeader.kt b/plugins/partiql-plugin/src/test/kotlin/org/partiql/plugin/PartiQLHeader.kt
index 5f2670ba15..b0229ee92a 100644
--- a/plugins/partiql-plugin/src/test/kotlin/org/partiql/plugin/PartiQLHeader.kt
+++ b/plugins/partiql-plugin/src/test/kotlin/org/partiql/plugin/PartiQLHeader.kt
@@ -224,7 +224,7 @@ internal object PartiQLHeader : Header() {
             name = "not",
             returns = BOOL,
             isNullCall = true,
-            isNullable = false,
+            isNullable = true,
             parameters = listOf(FunctionParameter("value", MISSING)),
         ),
     )