diff --git a/src/Databases/PostgreSQL/fetchPostgreSQLTableStructure.cpp b/src/Databases/PostgreSQL/fetchPostgreSQLTableStructure.cpp
index 15ce9a1baed..e065a497115 100644
--- a/src/Databases/PostgreSQL/fetchPostgreSQLTableStructure.cpp
+++ b/src/Databases/PostgreSQL/fetchPostgreSQLTableStructure.cpp
@@ -56,7 +56,7 @@ static DataTypePtr convertPostgreSQLDataType(std::string & type, bool is_nullabl
     {
         /// Numeric and decimal will both end up here as numeric. If it has type and precision,
         /// there will be Numeric(x, y), otherwise just Numeric
-        uint32_t precision, scale;
+        UInt32 precision, scale;
         if (type.ends_with(")"))
         {
             res = DataTypeFactory::instance().get(type);
@@ -71,11 +71,14 @@ static DataTypePtr convertPostgreSQLDataType(std::string & type, bool is_nullabl
                 res = std::make_shared<DataTypeDecimal<Decimal128>>(precision, scale);
             else if (precision <= DecimalUtils::maxPrecision<Decimal256>())
                 res = std::make_shared<DataTypeDecimal<Decimal256>>(precision, scale);
+            else
+                throw Exception(ErrorCodes::BAD_ARGUMENTS, "Presicion {} and scale {} are too big and not supported", precision, scale);
         }
         else
         {
             precision = DecimalUtils::maxPrecision<Decimal128>();
-            res = std::make_shared<DataTypeDecimal<Decimal128>>(precision, precision);
+            scale = precision >> 1;
+            res = std::make_shared<DataTypeDecimal<Decimal128>>(precision, scale);
         }
 
     }
diff --git a/tests/integration/test_storage_postgresql/test.py b/tests/integration/test_storage_postgresql/test.py
index 03af32a4803..cee495438a2 100644
--- a/tests/integration/test_storage_postgresql/test.py
+++ b/tests/integration/test_storage_postgresql/test.py
@@ -63,13 +63,13 @@ def test_postgres_conversions(started_cluster):
     cursor.execute(
         '''CREATE TABLE IF NOT EXISTS test_types (
         a smallint, b integer, c bigint, d real, e double precision, f serial, g bigserial,
-        h timestamp, i date, j decimal(5, 5), k numeric)''')
+        h timestamp, i date, j decimal(5, 3), k numeric)''')
     node1.query('''
         INSERT INTO TABLE FUNCTION postgresql('postgres1:5432', 'clickhouse', 'test_types', 'postgres', 'mysecretpassword') VALUES
-        (-32768, -2147483648, -9223372036854775808, 1.12345, 1.1234567890, 2147483647, 9223372036854775807, '2000-05-12 12:12:12', '2000-05-12', 0.22222, 0.22222)''')
+        (-32768, -2147483648, -9223372036854775808, 1.12345, 1.1234567890, 2147483647, 9223372036854775807, '2000-05-12 12:12:12', '2000-05-12', 22.222, 22.222)''')
     result = node1.query('''
-        SELECT a, b, c, d, e, f, g, h, i, j, toDecimal32(k, 5) FROM postgresql('postgres1:5432', 'clickhouse', 'test_types', 'postgres', 'mysecretpassword')''')
-    assert(result == '-32768\t-2147483648\t-9223372036854775808\t1.12345\t1.123456789\t2147483647\t9223372036854775807\t2000-05-12 12:12:12\t2000-05-12\t0.22222\t0.22222\n')
+        SELECT a, b, c, d, e, f, g, h, i, j, toDecimal128(k, 3) FROM postgresql('postgres1:5432', 'clickhouse', 'test_types', 'postgres', 'mysecretpassword')''')
+    assert(result == '-32768\t-2147483648\t-9223372036854775808\t1.12345\t1.123456789\t2147483647\t9223372036854775807\t2000-05-12 12:12:12\t2000-05-12\t22.222\t22.222\n')
 
     cursor.execute(
         '''CREATE TABLE IF NOT EXISTS test_array_dimensions