diff --git a/libs/sql-schema-describer/tests/postgres_introspection_tests.rs b/libs/sql-schema-describer/tests/postgres_introspection_tests.rs
index 75ba4a4b461c..fc72e053443a 100644
--- a/libs/sql-schema-describer/tests/postgres_introspection_tests.rs
+++ b/libs/sql-schema-describer/tests/postgres_introspection_tests.rs
@@ -327,7 +327,7 @@ async fn all_postgres_column_types_must_work() {
             name: "interval_col".into(),
             tpe: ColumnType {
                 raw: "interval".into(),
-                family: ColumnTypeFamily::DateTime,
+                family: ColumnTypeFamily::String,
                 arity: ColumnArity::Required,
             },
 
diff --git a/query-engine/prisma/src/request_handlers/graphql/protocol_adapter.rs b/query-engine/prisma/src/request_handlers/graphql/protocol_adapter.rs
index 1c69770bbcc4..978b82da6abf 100644
--- a/query-engine/prisma/src/request_handlers/graphql/protocol_adapter.rs
+++ b/query-engine/prisma/src/request_handlers/graphql/protocol_adapter.rs
@@ -3,8 +3,8 @@ use graphql_parser::query::{
     Definition, Document, OperationDefinition, Selection as GqlSelection, SelectionSet, Value,
 };
 use query_core::query_document::*;
-use rust_decimal::{prelude::FromPrimitive, Decimal};
-use std::collections::BTreeMap;
+use rust_decimal::Decimal;
+use std::{collections::BTreeMap, str::FromStr};
 
 /// Protocol adapter for GraphQL -> Query Document.
 ///
@@ -145,7 +145,7 @@ impl GraphQLProtocolAdapter {
                     i
                 ))),
             },
-            Value::Float(f) => match Decimal::from_f64(f) {
+            Value::Float(f) => match Decimal::from_str(&f.to_string()).ok() {
                 Some(dec) => Ok(QueryValue::Float(dec)),
                 None => Err(PrismaError::QueryConversionError(format!(
                     "invalid 64-bit float: {:?}",