It aims to simplify using SQLAlchemy with Flask by providing useful defaults and extra helpers that make it easier to accomplish common tasks. rowcount attribute of results to see how many records were inserted. replace: Drop the table before inserting new values. Thanks for the clear example of how to write a custom query class in Flask-SQLAlchemy. Additionally, unknown constraint types now warn when encountered within an autogenerate action rather than raise. SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. What’s New in 0. I have posted a suggestion (untried) below that inserts bad data into the consrc column. Strings and text() will be converted into a DefaultClause object upon initialization. The process for producing these is as follows: A given Table is examined for ForeignKeyConstraint objects, before any mapped class has been assigned to it. zip)下载,但其他任何shapefile也可以。. org/zzzeek/sqlalchemy/issue/3008/make-innerjoin-nested-the-default. The first way is the long way, in which you define each and every field along with its type. join(table_country)) defines the join condition/table. tb1 is the table which consists of data. keys ()) # Get Column c = t. A database isn't … Continue reading A Simple SqlAlchemy 0. There are three most important components in writing SQLAlchemy code: A Table that represents a table in a database. Connection`. When you add a new column to the table, PostgreSQL appends it at the end of the table. SQLAlchemy considers the database to be a relational algebra engine, not just a collection of tables. I have a Database setup with the PostGIS extension already but can't seem to add this Dataframe as a. This post demonstrates how data can be inserted to existing database, and also to check if the tables exist before executing create_all(). In this lesson, you'll learn how to use Python built-in module sqlite3. Legacy support is provided for sqlite3. Map Entity existing with the existing table in Entity FrameWork Is it possible to map existing tables with existing Entities in Entity frame work as like NHibernate doing. declarative. In SQL, we use the INSERT command to add records/rows into table data. ORM 与 SQLAlchemy 简介OR 博文 来自: 阿常呓语的专栏. Behind the scenes, a column is represented as a Column object, which is associated with a Table object. BigQuery Terminology. A collection of entities are grouped into a unit called:class:`~sqlalchemy. org/zzzeek/sqlalchemy/issue/3008/make-innerjoin-nested-the-default. UPDATE : The trigger activates whenever a row is modified (for example, through UPDATE statements). One of the great things about CockroachDB's support for SQL is the wide variety of frameworks and tools for working with SQL data. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse. Use FetchedValue to indicate that an already-existing column will generate a default value on the database side which will be available to SQLAlchemy for post-fetch after inserts. Sometimes applications need to dynamically insert their own settings into the Alembic configuration. Directed Graphs. 1Documentation Overview The documentation is separated into three sections: SQLAlchemy ORM, SQLAlchemy Core, and Dialects. How to insert data into a table; The question mark method is much better and using SQLAlchemy is even better because it does all the escaping for you so you won. Altering a SQLite table using Python:. 8 Tutorial →. If we start to rely on FK relations with other tables we should definitely choose update statements over delete+add. Similar functionality is available via the delete() method on Table. SQLite INSERT is used to insert records into a specified table of the database. Name of SQL table. Replacing an existing table with new data becomes a one-liner with insert_rows(), just as fetch_rows() makes life a bit easier. A collection of entities are grouped into a unit called:class:`~sqlalchemy. Active Flag: The active flag acts as a pointer to the top of each stack. This is useful if you need to migrate from one database to another. By voting up you can indicate which examples are most useful and appropriate. These SQL data types are actually instances of SQLAlchemy-provided classes known as TypeEngines. There may be a situation when you just want to create an exact copy or clone of an existing table to test or perform something without affecting the original table. :copyright: (c) 2014 by Armin. execute("CREATE TABLE AddressPoints_backup(Add_Number, geom);") connection. Many to Many relationships in SQLalchemy doesnt happen out of nothing you need to have a table just for the many to many relationship. create_all() does not re-create table if the table exists, the if statement is to demonstrate how the existence of the table can be checked using the db object created from SQLAlchemy(app). – dezso Feb 24 '15 at 17:18. Additionally, unknown constraint types now warn when encountered within an autogenerate action rather than raise. You can vote up the examples you like or vote down the ones you don't like. To do this, you can use the datetime module's strftime formatting function. Similar to the core SQLAlchemy package, Flask-SQLAlchemy provides an ORM for us to modify application data by. In this mode, the latest version of the Barbican application can create a new database table space updated to the latest schema version, or else it can update an existing database table space to the latest schema revision (called head in the docs). Struggling with sqlalchemy relations during insert. A step-by-step SQLAlchemy tutorial About This Tutorial. flask-sqlalchemy "no such table" under mod_wsgi For some reason flask-sqlalchemy seems to have problems resolving the sqlite tables when running under apache + mod_wsgi. Then, the easiest way to perform the update is to insert the data into a new table and rename it afterwards. Our declarative_base also provides some shortcuts — For example, we create our table by calling base. A collection of Table objects and their associated child objects is referred to as database metadata. Steps to Insert Values into SQL Server Table using Python Step 1: Prepare your dataset In order to insert values into SQL Server table using Python, you’ll need an existing table for a given database. SQLAlchemy can be used to automatically load tables from a database using something called reflection. Converting the Recursive CTE to a SQLAlchemy selectable: In order to use the materialized view with SQLAlchemy, I needed to convert the raw SQL query into a SQLAlchemy selectable and pass it to our custom create_mat_view() function. csv - is the table name which will be created in database test. Autoloading Tables from a Database. join(table_country)) defines the join condition/table. It provides a full suite of well known enterprise-level persistence patterns, designed for efficient and high-performing database access, adapted into a simple and Pythonic domain language. py from sqlalchemy import create_engine from sqlalchemy. Do not include the table name, as you would normally do with an INSERT command. executemany() to insert, update and delete multiple rows into the PostgreSQL table. orm import relationship from sqlalchemy import create_engine. H5py uses straightforward NumPy and Python metaphors, like dictionary and NumPy array syntax. insert(), data). pgatour=# create table players ( id serial PRIMARY KEY, name varchar (255) NOT NULL ); Ok, now, as a test, I’m going to add myself into the database from the psql command line. SQLAlchemy supports the widest variety of database and architectural designs as is reasonably possible. INSERT INTO `foo` (`bar`) VALUES (1) INSERT INTO `foo` (`bar`) VALUES (2) INSERT INTO `foo` (`bar`) VALUES (3) I've just converted some code to use sqlalchemy rather than raw sql and although it is now much nicer to work with it seems to be slower now (up to a factor of 10), I'm wondering if this is the reason. The lines of the first text file will be in the cells of column A, the lines of the second text file will be in the cells of column B, and so on. Then, the easiest way to perform the update is to insert the data into a new table and rename it afterwards. SQLALchemy's MSSQL dialect by default will attempt to use an OUTPUT_INSERTED clause, which in this. org/sqlalchemy/sqlalchemy/rev/95c2c1544340 changeset: 8076:95c2c1544340 user: Mike Bayer date: Mon Jan 30 17:52:28 2012. New users should begin with the Object Relational Tutorial. This command will not modify the actual structure of the table we’re inserting to, it just adds data. SqlAlchemy has two ways to define a databases columns. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse. All your models should have a constructor, so make sure to add one if you forgot. The function can modify the configuration object, or replace it with a different one. I wondered if the existing test should be updated so that the present code will fail. sqlalchemy 系列教程一sqlalchemy概述sqlalchemy 作为python 主流的ORM 框架,用这个框架有一段时间, 写个博客记录一下. Run the following SQL Query to add a new column named id that acts as PRIMARY KEY and auto increments for each insert. Then we defined a table using the Table and Column constructs provided by SQLAlchemy. It is an open source and cross-platform software released under MIT license. By breaking the data set into two tables, and introducing the concept of a foreign key, you've made the data a little more complex to think about, you have resolved the disadvantages of a single table representation. On a database like Postgresql or MSSQL where table resources are aggressively locked, this is critical so that rows and tables don't remain locked within connections that are no longer in use. it does not stop any one to INSERT data in table. By voting up you can indicate which examples are most useful and appropriate. SqlAlchemy has two ways to define a databases columns. A weird line about extend_existing, which is always exactly the same. Behind the scenes, a column is represented as a Column object, which is associated with a Table object. CREATE TABLE. 1 is now available. Constructors are only used by you, not by SQLAlchemy internally so it’s entirely up to you how you define them. no INSERT statement generated. INSERT INTO suppliers (supplier_id, supplier_name) VALUES (supplier_seq. That depends on what you need, or the structure of the existing SQL database. Steps to Insert Values into SQL Server Table using Python Step 1: Prepare your dataset In order to insert values into SQL Server table using Python, you’ll need an existing table for a given database. Before we can query something we will have to insert some data. Provides examples of how to use the INSERT command. To insert a date in a MySQL database, you need to have a column of Type date or datetime in your table. to_sql() to insert the new data into a newly created temporary table and then run a MySQL query to control how to append/update data in the existing table. FWIW, MSSQL has BULK INSERT and its not the standard INSERT clause that you are using with multiple VALUES tuples. 7, pandas 0. We're going to dive into SQLAlchemy's extensive query API to get an idea of all the ways we can query our data. In this video, I'll show you how to use Flask-SQLAlchemy to insert, update, and delete from tables in your database. All your models should have a constructor, so make sure to add one if you forgot. INSERT inserts new rows into a table. SQLite INSERT. you have to use the 'INSERT' clause. Similar to the core SQLAlchemy package, Flask-SQLAlchemy provides an ORM for us to modify application data by easily creating defined models. pgatour=# create table players ( id serial PRIMARY KEY, name varchar (255) NOT NULL ); Ok, now, as a test, I’m going to add myself into the database from the psql command line. 2016-10-12 15:47:45,439 INFO sqlalchemy. 15, MySQL Connector/Python 8. When defining the MetaData used by your application, it is necessary to supply the SQL data type used by each column of each table (unless the tables are defined with autoload=True, in which case SQLAlchemy provides the data types for you). Detailed knowhow of SQLite is required to understand how altering the name or schema of a table affects the existing indexes, triggers and constraints on the table. The fastest way to update a large table is to create a new one. Joining a Session into an External Transaction (such as for test suites). Bitbucket is more than just Git code management. The following are code examples for showing how to use sqlalchemy. Only the settings in bold letters required. sqlite import BLOB from sqlalchemy import Column, ForeignKey, Integer, String from sqlalchemy. leader INSERT INTO. The easy (or short) way is to use SqlAlchemy’s autoload functionality, which will introspect the table and pull out the field names in a rather magical way. It provides a full suite of well known enterprise-level persistence patterns, designed for efficient and high-performing database access, adapted into a simple and Pythonic domain language. People Data. Sees the model as in the dirty state for both associating table rows. Contents 1 Overview 3 1. I have a simple GeoPandas Dataframe: I would like to upload this GeoDataframe to a PostGIS table. on duplicate key update” or “merge into” construct to conditionally either insert a new row, or if a row with the key already exists, to either update the existing row with the new values, or first delete the old row and then insert a new one. The following are code examples for showing how to use sqlalchemy. 325 Dynamic Relations as Dictionaries. txt Start a command line session and change directory so you are in the directory that this file is in and enter the command. Close session does not mean close database connection. By breaking the data set into two tables, and introducing the concept of a foreign key, you've made the data a little more complex to think about, you have resolved the disadvantages of a single table representation. Our declarative_base also provides some shortcuts — For example, we create our table by calling base. Then in the shell do something like this: from django. schema import Table from mydatabase import db,metadata from pyDbRowFactory import DbRowFactory class caw_job(object): FULL_NAME="dal. Contents prefixes¶ - A list of strings to insert after CREATE in the CREATE TABLE statement. In SQL, we use the INSERT command to add records/rows into table data. The cursor. insert Now when we do i. id IS NULL; COMMIT;. If we want to create a table, class, and mapper all at once then we can do this declaratively. A step-by-step SQLAlchemy tutorial Getting Started. Hmmm interesting. 15, and SQLAlchemy 1. The field will be created if the actual parameter value is a string and there is no such column in the table table. For bulk inserts this may be very slow, though. Python insert single and multiple rows into MySQL table. You'll almost never need to write SQL by hand. INSERT INTO `foo` (`bar`) VALUES (1) INSERT INTO `foo` (`bar`) VALUES (2) INSERT INTO `foo` (`bar`) VALUES (3) I've just converted some code to use sqlalchemy rather than raw sql and although it is now much nicer to work with it seems to be slower now (up to a factor of 10), I'm wondering if this is the reason. Unit Of Work. csv - is the table name which will be created in database test. between` method available on all SQL expressions, as in:: stmt. To insert new rows into a MySQL table, you follow the steps below: Connect to the MySQL database server by creating a new MySQLConnection object. Instances of sqlservice. Create an insert object for the table you want to insert in. Here is a script with the base structure for this operation:. Insert data into specific table (sqlalchemy) Ask Question Asked 7 years, 3 months ago. In this article, I will let you know how to insert and retrieve a file stored as a BLOB in the SQLite table using Python. Like update attendance of the student, here attendance. The first two parameters we pass are the same as last time: first is our table name, and then our SQLAlchemy engine. create_all() does not re-create table if the table exists, the if statement is to demonstrate how the existence of the table can be checked using the db object created from SQLAlchemy(app). class sqlalchemy_utils. The table name to both find the data in and to learn the columns from. OpenStack and SQLAlchemy. A table can have multiple columns, with each column definition consisting of a name, data type, and optionally whether the column has: A default value and/or requires a value (NOT NULL). If you followed the other steps upfront, you will have a table called OSM_POI in SAP HANA. Before the test can actually be executed, we need to install the StreamSets Test Framework to enable the stf command for users. SQL also makes it fairly easy to combine ("join") information from multiple tables, letting you normalize the data, while keeping speed and flexibility at a maximum. 2 supports SQLAlchemy 0. In that case. Let's start by creating a model that represents users. Typically the steps for inserting new values would be: Make sure you have a connection object. Related course: Master SQL Databases with Python SQL Create and Insert The script below will store data into a new database called user. SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. The function can modify the configuration object, or replace it with a different one. You can vote up the examples you like or vote down the ones you don't like. Do take a look at the required settings (in bold) and adjust them in your site’s configuration. In this tutorial we will explicitly lay out. 2 years ago. Sq l Alchemy - Free ebook download as PDF File (. If Jupyter Notebook's response speed is any indication, that representation isn't filled in (with data from your existing database) until a/the query is executed. In our case it is Python 2. 1Documentation Overview The documentation is separated into three sections: SQLAlchemy ORM, SQLAlchemy Core, and Dialects. zip)下载,但其他任何shapefile也可以。. The following are code examples for showing how to use sqlalchemy. Alembic provides all the basic database migration operations via these directives, which are designed to be as simple and minimalistic as possible; there's no reliance upon existing table metadata for most of these directives. In SQLAlchemy ORM, the Object Relational Mapper is introduced and fully described. Insert new values to the existing table. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse. A long time ago (circa 2007 if Google serves me right), there was a Python programmer named Robin Munn who wrote a really nice tutorial on SqlAlchemy. The SQL Expression Language constructs its expressions in most cases against table columns. (4 replies) Hi, I'm fairly new to Python, and I'm trying to figure out how to use SQLAlchemy to connect to a MySQL DB and use table reflection to set up SQLAlchemy's tables. SQL-on-Hadoop Tutorial - SlideShare Pandas DF insert into DB table using SQLalchemy : Forums. SQLAlchemy - Introduction. Line 34 inserts the html string previously created into the tbody element as HTML. Объекты Table и Column уникальны по сравнению со всеми остальными объектами из пакета для работы со схемами, так как они используют двойное наследование от объектов из пакетов sqlalchemy. You can write SQL queries to accomplish this — use Flask-SQLAlchemy commands to do so. In an earlier post I presented a method for unit testing SQLAlchemy applications cleanly, without leaving any trace of the tables created during the run of the test suite. Here's a simplified case:. Hi All, I have used the below python code to insert the data frame from Python to SQL SERVER database. The first two parameters we pass are the same as last time: first is our table name, and then our SQLAlchemy engine. If you're an intermediate Python developer with knowledge of basic SQL syntax and relational theory, this book serves as both a learning tool and a handy reference. Essential SQLAlchemy: Mapping Python to Databases [Jason Myers, Rick Copeland] on Amazon. Embedding SQL Insert/Update Expressions into a Flush. sqlite3 — DB-API 2. Contribute to crazyguitar/pysheeet development by creating an account on GitHub. In this mode, the latest version of the Barbican application can create a new database table space updated to the latest schema version, or else it can update an existing database table space to the latest schema revision (called head in the docs). In terms of adding children, well, you really need only to add them and you do not care about the existing ones So your edited code should do the job just fine. After configuring our database, we’ll create classes. Any change to the referenced base table(s) (column re-ordering, new column addition, etc) will not be reflected in the view until the view is either: Altered with an ALTER VIEW statement. Sees the model as in the dirty state for both associating table rows. delete (table, whereclause=None, bind=None, returning=None, prefixes=None, **dialect_kw) ¶ Construct Delete object. The Insert and Update constructs build on the intermediary ValuesBase. SQLAlchemy - Quick Guide - SQLAlchemy is a popular SQL toolkit and Object Relational Mapper. sqlalchemy. can start fleshing out how some of the use cases for Django can be approximated in SQLAlchemy. Notice that we didn’t have to write down the full join condition, including the keys. A task that needs row updates instead of insertions should overload this method. I am trying to retrieve data from one table and then insert it into another table. Behind the scenes, a column is represented as a Column object, which is associated with a Table object. The target column names may be listed in any order. In our case the version is 3. By voting up you can indicate which examples are most useful and appropriate. index: boolean. The cursor. detect overlapping CIDR ranges in SQL, prevent duplicate ranges using triggers - overlap_cidr. SQL > ALTER TABLE > Drop Column Syntax. One of the great things about CockroachDB's support for SQL is the wide variety of frameworks and tools for working with SQL data. The demo code locks a table row using ‘select … for update’ to atomically increase the SEQ column. INSERT INTO `phone` (`id`, `country`, `area`, `number`) (1, 1, 234, 567890); The database would refuse to add a new record because one already exists with an id of 1. not already present in the relationship. somedata FROM newvals WHERE newvals. Autogenerate detection for an EXCLUDE constraint added or removed to/from an existing table is not implemented as the SQLAlchemy Postgresql dialect does not yet support reflection of EXCLUDE constraints. execute("CREATE TABLE AddressPoints_backup(Add_Number, geom);") connection. insert (), Only the columns that you give as kwargs to this call will actually be put into the final UPDATE statement. caw_job" tablename="caw_job" _table=Table(tablename, metadata, autoload=True). Then, running commit(), the file is transferred into ths is the most efficient, and recommended, way to load CSV files into a Postgres table. Typically the steps for inserting new values would be: Make sure you have a connection object. This is a a sample of the first table in which there is the following data. SQLAlchemy Documentation, Release 0. Cloning or Copying a Table. I have this table in my database (using Posgresql and Sqlalchemy) called "participants". SQLAlchemy 1. in web2py you can access legacy databases if tables have an existing unique auto-increment field id and if this field is used for references. key print (c. Only the settings in bold letters required. create_all() and SQLAlchemy. Sqlalchemy ORM append existing to association table. Flask-SQLAlchemy is an extension for Flask that adds support for SQLAlchemy to your application. Is this still a issue? We haven't seen this, but we run Rally within a venv. It uses an insert statement where you specify the table as an argument, and supply the data you wish to insert into the value via the. This command will not modify the actual structure of the table we’re inserting to, it just adds data. In this video I show you how to create a SQLite database and connect to it using Flask-SQLAlchemy. You have learned how to insert a new row into a table and update existing data of a table. It is important not to test things that are just part of the basic functionality of SQLAlchemy, as SQLAlchemy already comes with a large collection of well-written tests. Store the file containing the data to be imported on a unix machine and call the file utf8. Installation. When a view is created in SQL Server, metadata for the referenced table columns (column name and ordinal position) is persisted in the database. I have a similar requirement where I want to update existing data in a MySQL table from multiple CSVs over time. It's pretty easy to insert data into a database by using sqlalchemy. , meaning it takes place even if we emit INSERT commands to the table from the SQL. org(AddressPoints. The Unit Of Work system, a central part of SQLAlchemy's Object Relational Mapper (ORM), organizes pending insert/update/delete operations into queues and flushes them all in one batch. Some of the major topics that we will cover include installing SQLAlchemy, using it to load and visualize data, learning how to query, create a database, insert one or many rows, update data, and delete data, as well as more advanced concepts like hierarchical tables, joins, relationships, and core-related updates. A step-by-step SQLAlchemy tutorial Getting Started. Creates a new table in the current database. Let us now integrate Flask-SQLAlchemy and Flask-Migrate into our app. The first way is the long way, in which you define each and every field along with its type. Sometimes, you need to remove rows from a table. A couple years ago I wrote a rather flawed tutorial about SQLAlchemy. *FREE* shipping on qualifying offers. values() method as keyword arguments. Optionally provide an index_col parameter to use one of the columns as the index, otherwise default integer index will be used. The demo code locks a table row using ‘select … for update’ to atomically increase the SEQ column. Python's SQLAlchemy and Declarative. Changed in version 1. SQLAlchemy is doing something that Geniusql and Storm aren't doing on every insert. Since I'm a music nut, we'll be creating a simple database to store album information. The ON DUPLICATE KEY UPDATE clause can contain multiple column assignments, separated by commas. SQLAlchemy: Merging table data with foreign keys I'm running into issues when trying to update rows that use a foreign key as part of their primary key. ORM 与 SQLAlchemy 简介OR 博文 来自: 阿常呓语的专栏. So you need to tell the database what default value to insert here. The directive by default will only use "recreate" style on the SQLite backend, and only if directives are present which require this form, e. can you please post your table structure? are you sure you are saving it correctly?. Notice that we didn't have to write down the full join condition, including the keys. How do I INSERT or UPDATE new into Toner table? I suspect it's done with merge, but I cannot understand how to do. 8 Tutorial →. declarative_bas. " I am using SQL Server 2008 and executing the the script from SQL Server Management Studio gene furibondo Feb 7, 2011 at 9:48 PM. Map Entity existing with the existing table in Entity FrameWork Is it possible to map existing tables with existing Entities in Entity frame work as like NHibernate doing. Sqlalchemy ORM append existing to association table. SQLAlchemy helps you map Python objects to database tables without substantially changing your existing Python code. Let's start by creating a model that represents users. The SQLite DELETE statement allows you to delete one row, multiple rows, and all rows in a table. 1 and SQLAlchemy 1. delete (table, whereclause=None, bind=None, returning=None, prefixes=None, **dialect_kw) ¶ Construct Delete object. Working With SQLAlchemy And Your Data Model; Additionally, it is assumed that you have reached a point in the development life cycle where a change must be made to your current data model. The following are code examples for showing how to use sqlalchemy. I opted to just have the default use case be to create a database fresh with a tool we call setupdb_app. It's fast and easy to create tables, insert data into them, update that data and write queries that retrieve some or all parts of the data. This is how we use copy_from() to load our file instead of looping INSERT commands:. SqlAlchemy has two ways to define a databases columns. Similar functionality is available via the delete() method on Table. SQL HOME SQL Intro SQL Syntax SQL Select SQL Select Distinct SQL Where SQL And, Or, Not SQL Order By SQL Insert Into SQL Null Values SQL Update SQL Delete SQL Select Top SQL Min and Max SQL Count, Avg, Sum SQL Like SQL Wildcards SQL In SQL Between SQL Aliases SQL Joins SQL Inner Join SQL Left Join SQL Right Join SQL Full Join SQL Self Join SQL. INSERT, UPDATE and DELETE statements build on a hierarchy starting with UpdateBase. Build an insert statement insert_stmt for the data table to set name to 'Anna', count to 1, amount to 1000. SQLAlchemy dialect for the Netezza database. Any change to the referenced base table(s) (column re-ordering, new column addition, etc) will not be reflected in the view until the view is either: Altered with an ALTER VIEW statement. GeoAlchemy 2 adds to_shape, from_shape functions for a better integration with. The following are code examples for showing how to use sqlalchemy. conn - we are creating new connection with the parameters from the previous step; if_exists - this parameter has two options append - if you want to append data to existing table; replace - recreate the table and insert the data into newly created table; index - it can be two values. SQLAlchemy Documentation, Release 0. For example. Inserting records into a database. Re: [sqlalchemy] Re: Is it possible to define multiple model objects that refer to the same table? INSERT INTO issue_type_label (created, type, label_id, num_visits). py to your. A function decorated with the configure callback will be invoked after the configuration is read, and before it is used. In Oracle, primary keys are case-sensitive, so if two values differ only in case they can be used as two different primary keys.