diff --git a/parser/src/validation.rs b/parser/src/validation.rs
index 7ab8021..b4dc383 100644
--- a/parser/src/validation.rs
+++ b/parser/src/validation.rs
@@ -39,7 +39,7 @@ pub fn validate_operation(syntax: RawQuerySyntax, db_schema: &DbSchema) -> Resul
             validate_delete(table_name, condition, db_schema)
         },
         RawQuerySyntax::CreateTable(table_name, schema) => {
-            validate_create(table_name, schema, db_schema)
+            validate_create_table(table_name, schema, db_schema)
         },
         RawQuerySyntax::CreateIndex(table_name, column_name) => {
             validate_create_index(table_name, column_name, db_schema)
@@ -53,7 +53,7 @@ fn validate_table_exists<'a>(db_schema: &DbSchema<'a>, table_name: &'a TableName
         .map(|(_, table_position, table_schema)| (*table_position, *table_schema))
 }
 
-pub fn validate_create(table_name: TableName, table_schema: TableSchema, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
+fn validate_create_table(table_name: TableName, table_schema: TableSchema, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
     if let Some(_) = get_table_schema(db_schema, &table_name) {
         return Err(ValidationError::TableAlreadyExists(table_name.to_string()));
     }
@@ -68,7 +68,7 @@ pub fn validate_create(table_name: TableName, table_schema: TableSchema, db_sche
     Ok(Operation::CreateTable(table_name, table_schema))
 }
 
-pub fn validate_select(table_name: TableName, column_selection: syntax::ColumnSelection, condition: Option<syntax::Condition>, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
+fn validate_select(table_name: TableName, column_selection: syntax::ColumnSelection, condition: Option<syntax::Condition>, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
     let (table_position, schema) = validate_table_exists(db_schema, &table_name)?;
     match column_selection {
         syntax::ColumnSelection::Columns(columns) => {
@@ -95,7 +95,7 @@ pub fn validate_select(table_name: TableName, column_selection: syntax::ColumnSe
     }
 }
 
-pub fn validate_insert(table_name: TableName, insertion_values: syntax::InsertionValues, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
+fn validate_insert(table_name: TableName, insertion_values: syntax::InsertionValues, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
     let (table_position, schema) = validate_table_exists(db_schema, &table_name)?;
 
     // Check for duplicate columns in insertion_values.
@@ -139,7 +139,7 @@ pub fn validate_insert(table_name: TableName, insertion_values: syntax::Insertio
     Ok(Operation::Insert(table_position, values))
 }
 
-pub fn validate_delete(table_name: TableName, condition: Option<syntax::Condition>, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
+fn validate_delete(table_name: TableName, condition: Option<syntax::Condition>, db_schema: &DbSchema) -> Result<Operation, ValidationError> {
     let (table_position, schema) = validate_table_exists(db_schema, &table_name)?;
     let validated_condition = validate_condition(condition, schema)?;
     Ok(Operation::Delete(table_position, validated_condition))