callum-ryan commented on code in PR #503: URL: https://github.com/apache/iceberg-rust/pull/503#discussion_r1698860073
########## crates/catalog/sql/src/catalog.rs: ########## @@ -0,0 +1,836 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use std::borrow::Cow; +use std::collections::HashMap; +use std::time::Duration; + +use async_trait::async_trait; +use iceberg::io::FileIO; +use iceberg::spec::{TableMetadata, TableMetadataBuilder}; +use iceberg::table::Table; +use iceberg::{ + Catalog, Error, ErrorKind, Namespace, NamespaceIdent, Result, TableCommit, TableCreation, + TableIdent, +}; +use sqlx::any::{install_default_drivers, AnyPoolOptions, AnyRow}; +use sqlx::{AnyPool, Row}; +use typed_builder::TypedBuilder; +use uuid::Uuid; + +use crate::error::from_sqlx_error; + +static CATALOG_TABLE_VIEW_NAME: &str = "iceberg_tables"; +static CATALOG_NAME: &str = "catalog_name"; +static TABLE_NAME: &str = "table_name"; +static TABLE_NAMESPACE: &str = "table_namespace"; +static METADATA_LOCATION_PROP: &str = "metadata_location"; +static PREVIOUS_METADATA_LOCATION_PROP: &str = "previous_metadata_location"; +static RECORD_TYPE: &str = "iceberg_type"; +static TABLE_RECORD_TYPE: &str = "TABLE"; + +static NAMESPACE_PROPERTIES_TABLE_NAME: &str = "iceberg_namespace_properties"; +static NAMESPACE_NAME: &str = "namespace"; +static NAMESPACE_PROPERTY_KEY: &str = "property_key"; +static NAMESPACE_PROPERTY_VALUE: &str = "property_value"; + +static MAX_CONNECTIONS: u32 = 10; +static IDLE_TIMEOUT: u64 = 10; +static TEST_BEFORE_ACQUIRE: bool = true; + +/// Sql catalog config +#[derive(Debug, TypedBuilder)] +pub struct SqlCatalogConfig { + uri: String, + name: String, + warehouse: String, + #[builder(default)] + props: HashMap<String, String>, +} + +#[derive(Debug)] +/// Sql catalog implementation. +pub struct SqlCatalog { + name: String, + connection: AnyPool, + fileio: FileIO, + backend: DatabaseType, +} + +#[derive(Debug, PartialEq)] +enum DatabaseType { + PostgreSQL, + MySQL, + SQLite, +} + +impl SqlCatalog { + /// Create new sql catalog instance + pub async fn new(config: SqlCatalogConfig) -> Result<Self> { + install_default_drivers(); + let max_connections: u32 = config + .props + .get("pool.max-connections") + .map(|v| v.parse().unwrap()) + .unwrap_or(MAX_CONNECTIONS); + let idle_timeout: u64 = config + .props + .get("pool.idle-timeout") + .map(|v| v.parse().unwrap()) + .unwrap_or(IDLE_TIMEOUT); + let test_before_acquire: bool = config + .props + .get("pool.test-before-acquire") + .map(|v| v.parse().unwrap()) + .unwrap_or(TEST_BEFORE_ACQUIRE); + + let pool = AnyPoolOptions::new() + .max_connections(max_connections) + .idle_timeout(Duration::from_secs(idle_timeout)) + .test_before_acquire(test_before_acquire) + .connect(&config.uri) + .await + .map_err(from_sqlx_error)?; + + let conn = pool.acquire().await.map_err(from_sqlx_error)?; + + let db_type = match conn.backend_name() { + "PostgreSQL" => DatabaseType::PostgreSQL, + "MySQL" => DatabaseType::MySQL, + "SQLite" => DatabaseType::SQLite, + _ => DatabaseType::SQLite, + }; + + sqlx::query( + &format!("create table if not exists {} ({} varchar(255) not null, {} varchar(255) not null, {} varchar(255) not null, {} varchar(255), {} varchar(255), {} varchar(5), primary key ({}, {}, {}))", + CATALOG_TABLE_VIEW_NAME, + CATALOG_NAME, + TABLE_NAMESPACE, + TABLE_NAME, + METADATA_LOCATION_PROP, + PREVIOUS_METADATA_LOCATION_PROP, + RECORD_TYPE, + CATALOG_NAME, + TABLE_NAMESPACE, + TABLE_NAME), + ) + .execute(&pool) + .await + .map_err(from_sqlx_error)?; + + sqlx::query( + &format!("create table if not exists {} ({} varchar(255) not null, {} varchar(255) not null, {} varchar(255), {} varchar(255), primary key ({}, {}, {}))", + NAMESPACE_PROPERTIES_TABLE_NAME, + CATALOG_NAME, + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE, + CATALOG_NAME, + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY) + + ) + .execute(&pool) + .await + .map_err(from_sqlx_error)?; + + let file_io = FileIO::from_path(&config.warehouse)? + .with_props(&config.props) + .build()?; + + Ok(SqlCatalog { + name: config.name.to_owned(), + connection: pool, + fileio: file_io, + backend: db_type, + }) + } + /// handle postgres doing things differently + pub async fn execute_statement( + &self, + query: &String, + args: Vec<Option<&String>>, + ) -> Result<Vec<AnyRow>> { + let query_with_placeholders: Cow<str> = if self.backend == DatabaseType::PostgreSQL { + let mut query = query.clone(); + for i in 0..args.len() { + query = query.replacen("?", &format!("${}", i + 1), 1); + } + Cow::Owned(query) + } else { + Cow::Borrowed(query) + }; + + let mut sqlx_query = sqlx::query(&query_with_placeholders); + for arg in args { + sqlx_query = sqlx_query.bind(arg); + } + + sqlx_query + .fetch_all(&self.connection) + .await + .map_err(from_sqlx_error) + } +} + +#[derive(Debug)] +struct TableRef { + table_namespace: String, + table_name: String, + metadata_location: String, + _previous_metadata_location: Option<String>, +} + +fn query_map(row: &AnyRow) -> std::result::Result<TableRef, sqlx::Error> { + Ok(TableRef { + table_namespace: row.try_get(TABLE_NAMESPACE)?, + table_name: row.try_get(TABLE_NAME)?, + metadata_location: row.try_get(METADATA_LOCATION_PROP)?, + _previous_metadata_location: row + .try_get::<String, _>(PREVIOUS_METADATA_LOCATION_PROP) + .map(Some) + .or_else(|err| { + if let sqlx::Error::ColumnDecode { + index: _, + source: _, + } = err + { + Ok(None) + } else { + Err(err) + } + })?, + }) +} + +#[derive(Debug)] +struct NamespacePropRef { + namespace_prop_key: String, + namespace_prop_value: String, +} + +fn query_map_namespace(row: &AnyRow) -> std::result::Result<NamespacePropRef, sqlx::Error> { + Ok(NamespacePropRef { + namespace_prop_key: row.try_get(NAMESPACE_PROPERTY_KEY)?, + namespace_prop_value: row.try_get(NAMESPACE_PROPERTY_VALUE)?, + }) +} + +#[async_trait] +impl Catalog for SqlCatalog { + async fn list_namespaces( + &self, + parent: Option<&NamespaceIdent>, + ) -> Result<Vec<NamespaceIdent>> { + let name = &self.name; + let base_query = format!( + "select distinct {} from {} where {} = ?", + NAMESPACE_NAME, NAMESPACE_PROPERTIES_TABLE_NAME, CATALOG_NAME + ); + + let rows = match parent { + None => { + self.execute_statement(&base_query, vec![Some(&name.to_string())]) + .await? + } + Some(parent) => { + self.execute_statement( + &(base_query + " and " + TABLE_NAMESPACE + " like ?%"), + vec![Some(&name.to_string()), Some(&parent.join("."))], + ) + .await? + } + }; + + let iter = rows.iter().map(|row| row.try_get::<String, _>(0)); + + Ok(iter + .map(|x| { + x.and_then(|y| { + NamespaceIdent::from_strs(y.split('.')) + .map_err(|err| sqlx::Error::Decode(Box::new(err))) + }) + }) + .collect::<std::result::Result<_, sqlx::Error>>() + .map_err(from_sqlx_error)?) + } + + async fn create_namespace( + &self, + namespace: &NamespaceIdent, + properties: HashMap<String, String>, + ) -> Result<Namespace> { + { + let catalog_name = self.name.clone(); + let namespace = namespace.to_url_string(); + + let query_string = format!( + "insert into {} ({}, {}, {}, {}) values (?, ?, ?, ?);", + NAMESPACE_PROPERTIES_TABLE_NAME, + CATALOG_NAME, + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE + ); + + if properties.is_empty() { + self.execute_statement(&query_string, vec![ + Some(&catalog_name), + Some(&namespace), + None::<&String>, + None::<&String>, + ]) + .await?; + } else { + for (key, value) in properties.iter() { + self.execute_statement(&query_string, vec![ + Some(&catalog_name), + Some(&namespace), + Some(key), + Some(value), + ]) + .await?; + } + } + } + + Ok(Namespace::with_properties(namespace.clone(), properties)) + } + + async fn get_namespace(&self, namespace: &NamespaceIdent) -> Result<Namespace> { + let catalog_name = self.name.clone(); + let rows = self + .execute_statement( + &format!( + "select {}, {}, {} from {} where {} = ? and {} = ?", + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE, + NAMESPACE_PROPERTIES_TABLE_NAME, + CATALOG_NAME, + NAMESPACE_NAME + ), + vec![Some(&catalog_name), Some(&namespace.join("."))], + ) + .await?; + + let properties: HashMap<String, String> = rows + .iter() + .filter_map(|row| query_map_namespace(row).ok()) + .map(|ns| (ns.namespace_prop_key, ns.namespace_prop_value)) + .collect(); + + Ok(Namespace::with_properties(namespace.clone(), properties)) + } + + async fn namespace_exists(&self, namespace: &NamespaceIdent) -> Result<bool> { + let catalog_name = self.name.clone(); + let namespace = namespace.join("."); + let rows = self + .execute_statement( + &format!( + "select {}, {}, {} from {} where {} = ? and {} = ?", + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE, + NAMESPACE_PROPERTIES_TABLE_NAME, + CATALOG_NAME, + NAMESPACE_NAME + ), + vec![Some(&catalog_name), Some(&namespace)], + ) + .await?; + let mut iter = rows.iter().map(query_map_namespace); + + Ok(iter.next().is_some()) + } + + async fn update_namespace( + &self, + namespace: &NamespaceIdent, + properties: HashMap<String, String>, + ) -> Result<()> { + let catalog_name = self.name.clone(); + let namespace_name = namespace.join("."); + let exists = self.namespace_exists(namespace).await?; + if !exists { + Err(Error::new( + ErrorKind::Unexpected, + "cannot update namespace that does not exist", + )) + } else { + let current_nsp = self.get_namespace(namespace).await?; + let current_props = current_nsp.properties(); + + for (key, value) in properties { + if current_props.contains_key(&key) { + self.execute_statement( + &format!( + "update {} set {} = ?, {} = ? where {} = ? and {} = ? and {} = ?", + NAMESPACE_PROPERTIES_TABLE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE, + NAMESPACE_PROPERTY_KEY, + CATALOG_NAME, + NAMESPACE_NAME + ), + vec![ + Some(&key), + Some(&value), + Some(&key), + Some(&catalog_name), + Some(&namespace_name), + ], + ) + .await?; + } else { + self.execute_statement( + &format!( + "insert into {} ({}, {}, {}, {}) values (?, ?, ?, ?)", + NAMESPACE_PROPERTIES_TABLE_NAME, + CATALOG_NAME, + NAMESPACE_NAME, + NAMESPACE_PROPERTY_KEY, + NAMESPACE_PROPERTY_VALUE + ), + vec![ + Some(&catalog_name), + Some(&namespace_name), + Some(&key), + Some(&value), + ], + ) + .await?; + } + } + + Ok(()) + } + } + + async fn drop_namespace(&self, namespace: &NamespaceIdent) -> Result<()> { + let existence = self.namespace_exists(namespace).await?; + if existence { + if let Ok(tbls) = self.list_tables(namespace).await { + if !tbls.is_empty() { + Err(Error::new( + ErrorKind::Unexpected, + format!( + "unable to drop namespace as it contains {} tables", + tbls.len() + ), + )) + } else { + self.execute_statement( + &format!( + "delete from {} where {} = ? and {} = ?", + NAMESPACE_PROPERTIES_TABLE_NAME, CATALOG_NAME, NAMESPACE_NAME + ), + vec![Some(&self.name.clone()), Some(&namespace.join("."))], + ) + .await?; + + Ok(()) + } + } else { + Err(Error::new( + ErrorKind::Unexpected, + "unable to drop namespace", + )) + } + } else { + Err(Error::new( + ErrorKind::Unexpected, + "unable to drop namespace as it does not exist", + )) + } + } + + async fn list_tables(&self, namespace: &NamespaceIdent) -> Result<Vec<TableIdent>> { + let name = self.name.clone(); + let namespace = namespace.join("."); + let rows = self + .execute_statement( + &format!("select {}, {}, {}, {} from {} where {} = ? and {} = ? and ({} = '{}' or {} is null)", + TABLE_NAMESPACE, + TABLE_NAME, + METADATA_LOCATION_PROP, + PREVIOUS_METADATA_LOCATION_PROP, + CATALOG_TABLE_VIEW_NAME, + CATALOG_NAME, + TABLE_NAMESPACE, + RECORD_TYPE, + TABLE_RECORD_TYPE, + RECORD_TYPE), + vec![Some(&name), Some(&namespace)], + ) + .await?; + + let iter = rows.iter().map(query_map); + + Ok(iter + .map(|x| { + x.and_then(|y| { + let namespace = NamespaceIdent::from_strs(y.table_namespace.split('.')) + .map_err(|err| sqlx::Error::Decode(Box::new(err)))?; + Ok(TableIdent::new(namespace, y.table_name)) + }) + }) + .collect::<std::result::Result<_, sqlx::Error>>() + .map_err(from_sqlx_error)?) + } + + async fn table_exists(&self, identifier: &TableIdent) -> Result<bool> { + let catalog_name = self.name.clone(); + let namespace = identifier.namespace().join("."); + let name = identifier.name().to_string(); + let rows = self + .execute_statement( + &format!("select {}, {}, {}, {} from {} where {} = ? and {} = ? and {} = ? and ({} = '{}' or {} is null);", + TABLE_NAMESPACE, + TABLE_NAME, + METADATA_LOCATION_PROP, + PREVIOUS_METADATA_LOCATION_PROP, + CATALOG_TABLE_VIEW_NAME, + CATALOG_NAME, + TABLE_NAMESPACE, + TABLE_NAME, + RECORD_TYPE, + TABLE_RECORD_TYPE, + RECORD_TYPE), + vec![Some(&catalog_name), Some(&namespace), Some(&name)], + ) + .await?; + let mut iter = rows.iter().map(query_map); + + Ok(iter.next().is_some()) + } + + async fn drop_table(&self, identifier: &TableIdent) -> Result<()> { + let catalog_name = self.name.clone(); + let namespace = identifier.namespace().to_url_string(); + let name = identifier.name.to_string(); + + self.execute_statement( + &format!( + "delete from {} where {} = ? and {} = ? and {} = ?", + CATALOG_TABLE_VIEW_NAME, CATALOG_NAME, TABLE_NAMESPACE, TABLE_NAME + ), + vec![Some(&catalog_name), Some(&namespace), Some(&name)], + ) + .await?; + + Ok(()) + } + + async fn load_table(&self, identifier: &TableIdent) -> Result<Table> { + let metadata_location = { + let catalog_name = self.name.clone(); + let namespace = identifier.namespace().to_url_string(); + let name = identifier.name().to_string(); + let row = self + .execute_statement( + &format!("select {}, {}, {}, {} FROM {} where {} = ? and {} = ? and {} = ? and ({} = '{}' or {} is null)", + TABLE_NAMESPACE, + TABLE_NAME, + METADATA_LOCATION_PROP, + PREVIOUS_METADATA_LOCATION_PROP, + CATALOG_TABLE_VIEW_NAME, + CATALOG_NAME, + TABLE_NAMESPACE, + TABLE_NAME, + RECORD_TYPE, + TABLE_RECORD_TYPE, + RECORD_TYPE + ), + vec![Some(&catalog_name), Some(&namespace), Some(&name)], + ) + .await?; + assert_eq!(row.len(), 1, "expected only one row from load_table query"); + let row = query_map(&row[0]).map_err(from_sqlx_error)?; + row.metadata_location + }; + let file = self.fileio.new_input(&metadata_location)?; + let metadata_content = file.read().await?; + let metadata = serde_json::from_slice::<TableMetadata>(&metadata_content)?; + + let table = Table::builder() + .file_io(self.fileio.clone()) + .identifier(identifier.clone()) + .metadata(metadata) + .build(); + + Ok(table) + } + + async fn create_table( + &self, + namespace: &NamespaceIdent, + creation: TableCreation, + ) -> Result<Table> { + let location = creation.location.as_ref().ok_or(Error::new( + ErrorKind::DataInvalid, + "Table creation with the Sql catalog requires a location.", + ))?; + let name = creation.name.clone(); + + let uuid = Uuid::new_v4(); + let metadata_location = + location.clone() + "/metadata/" + "0-" + &uuid.to_string() + ".metadata.json"; + + let metadata = TableMetadataBuilder::from_table_creation(creation)?.build()?; + + let file = self.fileio.new_output(&metadata_location)?; + + file.write(serde_json::to_vec(&metadata)?.into()).await?; + + { + let catalog_name = self.name.clone(); + let namespace = namespace.to_url_string(); + let name = name.clone(); + let metadata_location = metadata_location.to_string(); + + self.execute_statement( + &format!( + "insert into {} ({}, {}, {}, {}) values (?, ?, ?, ?)", + CATALOG_TABLE_VIEW_NAME, + CATALOG_NAME, + TABLE_NAMESPACE, + TABLE_NAME, + METADATA_LOCATION_PROP + ), + vec![ + Some(&catalog_name), + Some(&namespace), + Some(&name), + Some(&metadata_location), + ], + ) + .await?; + } + + Ok(Table::builder() + .file_io(self.fileio.clone()) + .metadata_location(metadata_location) + .identifier(TableIdent::new(namespace.clone(), name)) + .metadata(metadata) + .build()) + } + + async fn rename_table(&self, src: &TableIdent, dest: &TableIdent) -> Result<()> { + let source_namespace = &src.namespace.to_url_string(); + let source_table = &src.name; + + let destination_namespace = &dest.namespace.to_url_string(); + let destination_table = &dest.name; + + let src_table_exist = self.table_exists(src).await; + let dst_table_exist = self.table_exists(dest).await; + + match src_table_exist { + Ok(res) => { + if res { + match dst_table_exist { + Ok(dst_res) => { + if dst_res { + Err(Error::new( + ErrorKind::Unexpected, + "failed to rename table as destination already exists", + )) + } else { + Ok(()) + } + } + Err(_) => Err(Error::new(ErrorKind::Unexpected, "failed to rename table")), + } + } else { + Err(Error::new( + ErrorKind::Unexpected, + "failed to rename table as source does not exist", + )) + } + } + Err(_) => Err(Error::new(ErrorKind::Unexpected, "failed to rename table")), + }?; + + let query = format!( + "update {} set {} = ?, {} = ? where {} = ? and {} = ?", + CATALOG_TABLE_VIEW_NAME, TABLE_NAMESPACE, TABLE_NAME, TABLE_NAMESPACE, TABLE_NAME + ); + + self.execute_statement(&query, vec![ + Some(destination_namespace), + Some(destination_table), + Some(source_namespace), + Some(source_table), + ]) + .await?; + + let src_table_exist = self.table_exists(src).await; + let dst_table_exist = self.table_exists(dest).await; + + match src_table_exist { + Ok(src_res) => match dst_table_exist { + Ok(dst_res) => { + if !src_res && dst_res { + Ok(()) + } else { + Err(Error::new(ErrorKind::Unexpected, "failed to rename table")) + } + } + Err(_) => Err(Error::new(ErrorKind::Unexpected, "failed to rename table")), + }, + Err(_) => Err(Error::new(ErrorKind::Unexpected, "failed to rename table")), + } + } + + async fn update_table(&self, _commit: TableCommit) -> Result<Table> { + todo!() + } +} + +#[cfg(test)] +pub mod tests { + use std::collections::HashMap; + + use iceberg::spec::{NestedField, PrimitiveType, Schema, Type}; + use iceberg::{Catalog, Namespace, NamespaceIdent, TableCreation, TableIdent}; + use sqlx::migrate::MigrateDatabase; + use tempfile::TempDir; + + use crate::{SqlCatalog, SqlCatalogConfig}; + + #[tokio::test] + async fn test_create_update_drop_table() { + let dir = TempDir::with_prefix("sql-test").unwrap(); + let warehouse_root = dir.path().to_str().unwrap(); + + //name of the database should be part of the url. usually for sqllite it creates or opens one if (.db found) + let sql_lite_uri = "sqlite://iceberg"; + + if !sqlx::Sqlite::database_exists(sql_lite_uri).await.unwrap() { + sqlx::Sqlite::create_database(sql_lite_uri).await.unwrap(); + } + + let config = SqlCatalogConfig::builder() + .uri(sql_lite_uri.to_string()) + .name("iceberg".to_string()) + .warehouse(warehouse_root.to_owned()) + .build(); + + let catalog = SqlCatalog::new(config).await.unwrap(); + + let namespace = NamespaceIdent::new("test".to_owned()); + let mut props = HashMap::from([("test_prop".to_string(), "test_prop_value".to_string())]); + + catalog + .create_namespace(&namespace, props.clone()) + .await + .unwrap(); + + let identifier = TableIdent::new(namespace.clone(), "table1".to_owned()); + + let schema = Schema::builder() + .with_schema_id(1) + .with_fields(vec![ + NestedField::optional(1, "one", Type::Primitive(PrimitiveType::String)).into(), + NestedField::optional(2, "two", Type::Primitive(PrimitiveType::String)).into(), + ]) + .build() + .unwrap(); + + let creation = TableCreation::builder() + .name("table1".to_owned()) + .location(warehouse_root.to_owned() + "/warehouse/table1") + .schema(schema) + .build(); + + catalog.create_table(&namespace, creation).await.unwrap(); + + let exists = catalog + .table_exists(&identifier) + .await + .expect("Table doesn't exist"); + assert!(exists); + + let tables = catalog + .list_tables(&namespace) + .await + .expect("Failed to list Tables"); + assert_eq!(tables[0].name(), "table1".to_owned()); + + let namespaces = catalog + .list_namespaces(None) + .await + .expect("Failed to list namespaces"); + assert_eq!(namespaces[0].to_url_string(), "test"); + + let test_namespace = catalog + .get_namespace(&namespace) + .await + .expect("Failed to get namespace"); + + assert_eq!( + test_namespace, + Namespace::with_properties(namespace.clone(), props.clone()) + ); + + props.insert("test_prop2".to_string(), "test_prop_value2".to_string()); + + catalog + .update_namespace(&namespace, props.clone()) + .await + .unwrap(); + + let test_namespace = catalog + .get_namespace(&namespace) + .await + .expect("Failed to get namespace"); + + assert_eq!( + test_namespace, + Namespace::with_properties(namespace.clone(), props.clone()) + ); + + //load table points to a /var location - check why Review Comment: Removed -- This is an automated message from the Apache Git Service. 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