Python sqlparse get table names

Python sqlparse get table names. Name] Jan 3, 2016 · I have a problem to get data from the sqlite3 database. Represents a SQL statement. py for details. columns = [] parser = sqlparser. The module is compatible with Python 3. dev0 sqlparse is a non-validating SQL parser for Python. Allowed values are “python” and “php”. table or only table name. 1',user='root',passwd='root',db='my_database') # Create a Cursor object cur = conn. 6+ and released under the terms of theNew BSD license. joins: select col1,col2 from table1 join table2 on col1 = col2. Python sqlparse. 2. select * from Table where Col1= 'aaa' AND Col2 > 10 which should be converted in a nested-JSON format like this: Jun 1, 2015 · 3. comma_first If True comma-first notation for column names is used. Amt - B. ttype is Keyword: continue else: if isinstance (token, IdentifierList): for identifier in token. OPTIONS (. Is there a a library, that can do this and could I get an example for my case? Something like: May 30, 2022 · So I have used create_dict () another function to create a proper dictionary out of extracted_keys dictionary. def parse_sql_columns(sql): columns = [] parsed = sqlparse. I've figured out a regex to achieve it after Aug 17, 2023 · SELECT 文にあるエイリアスを特定したくて、sqlparse を使ってパースしてみました。 github. But i could not parse sub query. select col1 from test. Desired output from above example: TABLE_ABC Any ideas? Mar 4, 2019 · I have the following SQL query and would like to parse it using sqlparse. Applying the logic from the previous steps, we can now Sep 20, 2019 · I am trying to extract all the column names from a given SQL query ( MySQL to start with). Next, we will add the improvement of this function, that is, the implementation of blood relationship parsing in SQL fields. Jun 4, 2013 · But I intend to keep the grammar simple because I am not trying to get every part of select statement parsed rather I am looking for just table names. TABLE_WXYZ. sdp path_to_ddl_file # for example: sdp tests/sql/test_two_tables. EMPNO. Here is an example. ¶. tables. e. So I require a sql-parser for it and I found out about python-sqlparse but am unable to understand how to extract column names or name of the table e. Statement(tokens=None) ¶. from pysqlparse import parser . sql Statements(#): 1 Source Tables: db1. I am new to jsqlparser and trying to parse the sql statement to get table name and its query type (In Java). json. Once that is done, you can search for the select query token and parse the underlying tokens. deptid = dept. I’ve been working with the extract_table_names. tables". Sep 18, 2021 · By default output of parser looks like a List with Dicts where each dict == one entitiy from ddl (table, sequence, type, etc). Some popular open-source databases and data warehouses are: MySQL/MariaDB. , "IN" operator, "=" operator, "Like" operator. tokens: if from_seen: if token. Find table names and other information in a SQL query. For now we are able to extract columns along with their conditions from the SQL WHERE conditon for following operators i. I am using sqlparser module in python. test_a1 on a. Alternatively, run your script with the python that is managed by conda. language_id WHERE language_name = "English" I use sqlparse library in python. py and grouping. connect('my. The results come back as just one identifier token. This is a function that must be completed for Hive blood relationship or MySQL. – Parse SQL statements. ARTICLES a, SITE s, datamart_Sales. A non-validating SQL parser module for Python. table1 select * from db2. 3. I was originally trying to use string functions but it quickly got too complicated. By integrating sqlparse into code editors, IDEs, and other development tools, developers can ensure that their SQL code remains clean, readable, and maintainable, even as projects grow in complexity. Screenshot by the author. ·. Automatically conduct column alias resolution, sub queries aliases resolution as well as tables aliases resolving. Thanks to the many contributors for writing bug reports and working on pull requests who made this version possible! SQLGlot is a no-dependency SQL parser, transpiler, optimizer, and engine. Cat2 = "M" or B. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. I am able to get the table name by using something like sqlparse is a non-validating SQL parser for Python. import re. Jun 16, 2015 · Disclaimer: this answer is more experimental then practical, but maybe worth mention. sqlite'. table ) test_table . select col1,col2 from table1, table2 on col1 Apr 13, 2024 · sqlparse is a non-validating SQL parser for Python. Any thoughts would be appreciated. Jan 5, 2017 · I am reading a CSV file into my java program and it has an sql query in its every record. Apr 16, 2024 · Uses tokenized query returned by python-sqlparse and generates query metadata. Fortunately, the metadata is still present on the Nov 30, 2021 · To install for that version of python specifically, you could try something like (might need to check that that is actual path to python. I have been able to get sqlparse to return all the table names but it also returns the order by and group by IdentifierLists. make, t2. I’d like to feed any sql script into python and output a list of tables that were used in it. Here's a short and simple python program to print out the table names and the column names for those tables (python 2. Parser() # Parser does not like new lines. If the star column in the select list is not qualified with a table name, then it will be linked to all tables in the from clause. This metadata can return column and table names from your supplied SQL query. 5. INSERT INTO Customers (CustomerName, Country) SELECT SupplierName, Country FROM Suppliers. flatten() if token. Installation pip3 install pysqlparse Use Import from pysqlparse import parser get_table_names. The table names in the sql code are sometimes written with alias or schema. Preferably with the number of times each column and table makes an appearance. May 16, 2016 · First of all your sourcecode is correct. get_identifiers (): tables. tokens. How i can parse whole query. ttype == sqlparse. SQLTable has named argument key and if you assign it the name of the field then this field becomes the primary key: . com sqlparse の主要クラス sqlparse でクエリをパースするときに、下記のクラス構造を把握しておくと挙動を掴みやすくなると思います。クラスごとの一文は、実装を読んだうえでの私の理解を記したものです I like the answer by @thebeancounter, but prefer to parameterize the unknowns, the only problem being a vulnerability to exploits on the table name. Amt > 0 and B. s += " table_schema". select * from xyz inner join dhf on df = hfj where z > 100 Apr 11, 2018 · 1. Cat3 = "C" or B. parse(sql) for i in y[0]. I'm using the [moz-sql-parser] [1] to identify the sql parts in a query and then writing a function parse out table names and columns that were joined on. sql. The text file has to be read (probably using text_io package), the SQL query needs to be parsed and the column names, table names and where clauses have to be extracted and inserted into separate tables. EMPNO, POSITION. I want to parse this (Select)SQL query to find the table names and column names mentioned in those queries. test_b b. Generator yielding ungrouped tokens. col1 = a1. identifier = None. get_name() ¶. Also it is quite involved to define the complete grammar for any commercially available modern day database like Teradata. 8+ and released under the terms of the New BSD license. col1 from table1. WHERE Country='Germany'. ID Jan 11, 2024 · Python's sqlparse library is a powerful tool for improving SQL formatting, enhancing readability and maintainability. db=sqlite3. If you need only tables and not views then you can include table_type in your query like-. So anything after the first period (. 7 and Python >= 3. Where. def parse_sql_tables (sql): tables = [] parsed = sqlparse. newline_indent = '\n '. 2. first, t1. select * from emp, dept where emp. s = "SELECT". JavaScript 1. This is I've tried: Mar 10, 2023 · AND SALARY <= 3000; Here I would like to remove the Start and End dates so the user will simply type as follows and then get the result: SELECT EMPLOYEE. test_a join test. ) ttype, values = sqlparse. Supported queries syntax: MySQL. py Oct 25, 2021 · The Python sqlparse library seems to be a very useful tool for this task but it only gets me part of the way there. For context: I regularly query a healthcare relational database with >20K tables. So, consider using a parser generator. Aug 26, 2020 · sql-metadata is a Python library that uses a tokenized query returned by python-sqlparse and generates query metadata. If SELECT is selected, simple SQL analysis is required. Already looked at Python-sqlparse , sqlparse, but I'm not sure they are up to the Apr 12, 2015 · I am trying to determine all of the possible ways that a table can be referenced in a SQL to make sure I cover all of the options. get_real_name ¶ Returns the real name (object name) of this identifier. last, t2. simple-ddl-parser is installed to environment as command sdp. visit_id = c. dumps (parse ('''select * from tbl d inner join jointbl1 c on d. Result:---- Tables: [Employee]---- Columns: [age,name] Dec 16, 2021 · The table names in the sql code are sometimes written with alias or schema. . pip3 install pysqlparse. When I attempt to get the table name from inside the parenthesis all the comes back is test May 5, 2024 · $ sqllineage -e "insert into db1. python-sqlparse Documentation, Release 0. I am using sqlparse library. Seller f, datamart_Sales. select col1,col2 from table1 left outer join table2 on col1 = col2. Feb 12, 2020 · 'SELECT COL_1, COL_2, COL_3 from SCHEMA_1. Connection to DB is fine. conn = sqlite3. If the first token in this group isn’t a DML or DDL keyword “UNKNOWN” is returned. get_query_columns("SELECT test, id FROM foo, bar") [u'test', u'id'] Oct 22, 2021 · i have a complex SQL like below. Can anyone point me to anything packages or examples that might help with this? The sql can get pretty involved too and should handle sub queries and alias’s. py example for about a day now to try and parse the following queries. flag="V") then 1 end) as TEST_COLUMN_1, SUM(case when(A. This is the example of the query: SELECT * FROM film JOIN language ON film. Just google "restore <brand> from dump" and that should get you started. I have a sql query and I want to fetch all the conditions in where clause into a Python dictionary. This code produces the following output. CSS 2. Similar steps exis 5th for any other brand. 8+ and released under the terms of the New BSD license . import sqlparser. – Ben. Mar 5, 2021 · Basically running something like Select query, queryid, userid from pg_stat_state and then parsing each query to check if it was a Select or an Insert or a Delete query and also extract the table_Name from the query. text_factory = str. parse(sql) Apr 2, 2019 · I need to extract parameters like table names, selected columns and WHERE-statements for a given SQL string in Python 3. TEMPS t This is what I sqlparse is a non-validating SQL parser for Python. import sqlparse query = """ select SUM(case when(A. Makefile 1. 6 min read. M_CLOSE = ttype, values + ('FACET',) But it may be broken in the future. parse (sql) stmt = parsed [0] from_seen = False for token in stmt. s += " (". This section shows some simple usage examples of these functions. serialization. Import. It is not well documented and the main way I get information about it is by looking at SQL code from other data analysts. append (SQLParser. g. I found that class pandas. owner_id. DML Examples The following are 30 code examples of sqlparse. I'm using it to parse out queries column names to use in report headers. col1) a. Parameters: sql – A string containing one or more SQL statements. Let’s get started with splitting a string containing one or more SQL statements into a list of single statements using split(): >>> import sqlparse sqlparse is a popular Python package that uses regular expressions to parse SQL. I have a sample query below : join_query2 = json. 302 Found. Follow. If given the output is additionally formatted to be used as a variable in a programming language. If you're sure it's okay, then this works: def get_col_names(cursor, tablename): """Get column names of a table, given its name and a cursor (or connection) to the database. import sqlite3. exe in that folder): C:\Users\zesha\AppData\Roaming\Python\Python39\python. Returns a set of all table names (without aliases) found in the SQL string. Returns the type of a statement. select col1 from table1. It can be used to format SQL or translate between 21 different dialects like DuckDB, Presto / Trino, Spark / Databricks, Snowflake, and BigQuery. encoding – The encoding of the statement (optional). Dec 18, 2014 · import pymysql # Connect to the database conn = pymysql. def get_query_columns(sql): '''Return a list of column headers from given sqls select clause'''. Open Source Parsers. class sqlparse. Jun 27, 2015 · 6. c from the SQL query. I'm using sqlparse package but I'm only getting the alias of the tables, you will find my code bellow : Sep 19, 2012 · We need to mix this solution with The solution @Maurice has mentioned, If we want to make sure one column is belong to one table ,we need to do some query on sys database. Select age,name from Employee. connect(db_filename) db. A group of tokens. You will see the output in schemas folder in file with name test_two_tables_schema. Uses tokenized query returned by python-sqlparse and generates query metadata. test_table as ( select 1 from fake. It can't parse hyphens in the bigquery project names/datasets or table names and the developer has no intent to fix it: && python benchmarks/sqlparse_benchmark. Alternatively, parser/optimizer platforms like ANTLR or Apache Calcite help to reduce the effort to implement the SQL dialect of your choice. Jan 17, 2022 · Basically, this library takes your SQL query and tokenizes it. table1 (DATA4 BIGINT, DATA5 BIGINT, DATA2 BIGINT, DATA3 BIGINT) USING parquet. t. table2" Statements(#): 1 Source Tables: db2. When I open DB through sqlitebrowser names were just unreadable characters. table_foo db1. DML() . dbo. Mar 11, 2014 · Want to parse sql join query, select sub query into python. Oct 25, 2019 · 10. (See the current implementation, sql. get_real_name() for token in parsed[0]. group_tokens (grp_cls, start, end, include_end = True, extend = False) ¶ Dec 6, 2014 · Extracting table names from more complex queries. I'm interested only in the SQL condition, so the starting point is a dummy SQL statement, i. It aims to read a wide variety of SQL inputs and output syntactically and semantically correct SQL in the targeted dialects. e. get_alias() ¶. Split sql into single statements. simple: select col1 from table1. , import sqlparse. x supports Python 2. id. sqlparse is a non-validating SQL parser for Python. Output: Oct 28, 2021 · I'm already using sqlparse to get table names, but now I'm wondering if its possible to get a nested dictionary with the query tree/hierarchy allowing to create a tree-view like below: The result would be something like: 简介. Installation. Zach Quinn. get_table_name (identifier)) elif isinstance Mar 20, 2021 · I'm trying to parse out sql queries. Returns the name of this identifier. To get the table name from a SQL Query, select *. append(dataset) result['dataset'] = dataset_lst. For eg1. Mar 16, 2018 · The SQL statement looks like this: CREATE TABLE default. You have to keep in mind: JSqlParser is only a parser. If I have a SQL script is there a way to parse and extract the columns and tables referenced in the script into a table like structure : Script: Select t1. 本文将详细介绍sqlparse的安装和使用方法，并提供一些示例代码。. cursor() import sqlparse sql_query = "SELECT column1, column2 FROM table1 WHERE condition;" parsed = sqlparse. It has an additional instance attribute tokens which holds a list of child-tokens. May 28, 2018 · All of the tables are collected in the tables attribute of the SQLAlchemy MetaData object. TABLE_ABC MINUS SELECT COL_1, COL_2, COL_3 from SCHEMA_2. db_filename = 'database. so, the output generated by this tool is: I have 150+ SQL queries in separate text files that I need to analyze (just the actual SQL code, not the data results) in order to identify all column names and table names used. Could someone help me with this? May 15, 2012 · 1. io. Jul 5, 2022 · dataset_lst = dataset_lst. nginx Mar 28, 2019 · 2. from owners t1. s = "select count(*) from users where employee_type = 'Employee' AND (employment_status = 'Active' OR employment_status = 'On Leave') AND (time_type='Full time' OR country_code <> 'US') AND hire_date < NOW() AND email Aug 30, 2016 · I want to parse a complex SQL which has (inner join,outer join) and get the table names used in the SQL. 可以 y = sqlparse. Dec 10, 2008 · Hi all, I have a requirement wherein a SQL query will be given in a text file. EMPNO = J. In code, that reads like. year. s += ", table_name". text_factory = str We would like to show you a description here but the site won’t allow us. exe -m pip install sqlparse. This is only the case if you write it fully qualified: select table1. sql = """select *. sqlparse. If you want to have also output in console - use -v flag for verbose. The select list in the above SQL query will list all columns in both emp and dept table. There's no point in wasting time selecting data that you don't need. Here are a couple of example from the sql-metadata github readme: Jul 5, 2022 · How to use Python to extract datasets and table names from plaintext SQL queries. I tried to use it with DDLparse and SQLparse tools, but not exactly parse the complete SQL file. get_parent_name ¶ Return name of the parent object if any. keys() ['posts', 'comments', 'users'] If you're using the declarative extension, then you probably aren't managing the metadata yourself. Similar behaviour occurs with aliases. A parent object is identified by the first occurring dot. from (. found_select = False. table_baz Advanced Usage Multiple SQL Statements This function must also be implemented. I'm mapping a client's database & views & reports, and have dozens of queries to map, so the need to automate the job. ) PARTITIONED BY (DATA2, DATA3) I need to parse it in Python and pull out the columns named in the PARTITIONED BY clause. cursor() conn. s += " WHERE". WHERE E. It provides support for parsing, splitting and formatting SQL statements. Output: We can see this article based on Python sqlparse's implementation of blood relationship tracking and parsing in SQL tables. get_token_at_offset (offset) ¶ Returns the token that is on position offset. ) and before the next space. Jul 9, 2017 · The criteria of 1=0 does not select any rows because you aren't trying to get data; all you want is the table description that is in the cursor object. With the research results of sqlparse source code, we can call the corresponding functions: # Get the main functions of the SQL. Jan 10, 2019 · If its mysql, you need to install mysql on your local machine, create a new db, load the dump, and then query it like you would the original library (using PyMySQL, for example). table1 Or you can parse a SQL file with -f option: $ sqllineage -f foo. Feb 25, 2016 · sql-metadata is a Python library that uses a tokenized query returned by python-sqlparse and generates query metadata. FROM EMPLOYEE E, JOBHISTORY J. we can extract Table name and column name from given SQL script,But if want to make sure which columns is belong to which table then we need use query on system tables and columns. db') conn_cursor = conn. Nov 3, 2021 · I'm trying to use python library sqlparse to extract the WHERE condition from a SQL statement and represent it in conditional JSON format. def find_selected_columns(query) -> list[str]: tokens = sqlparse. Returns the alias for this identifier or None. I am able to get the table names if it is simple select but if the SQL has inner join ,left join like below then the result is giving only the first table. I'm using sqlparse package but I'm only getting the alias of the tables, you will find my code bellow : SELECT * FROM VA_ASSISTES va, datamart_Sales. Python sqlparse是一个用于解析和格式化SQL语句的Python库。. I can't find out the names of tables and their encoding. on t1. 安装. 8%. split(sql, encoding=None, strip_semicolon=False) ¶. The sqlparse module provides three simple functions on module level to achieve some common tasks when working with SQL statements. I am using sqlparse python module but very new to it so need help. 0. To get a list of the names of those tables: >>> metadata. michaelshobbscommented Dec 6, 2014. parse(sql_query) table_and_column_names = [token. Cat5 is NULL) then 1 end) as TEST_COLUMN_2 from test_table A left join test_table_2 as B on A. Cat1 = "A" and (B. python 3 follows). table_bar Target Tables: db2. Contribute to andialbrecht/sqlparse development by creating an account on GitHub. left join test. Example code, see more on Github: Nov 14, 2023 · In your case, you have to add a new pattern for closing the WHERE group like this. get_real_name()) I get the following results, test. 0%. Provides also a helper for normalization of SQL queries. get_table_names. Thanks! IMPORTANT: The supported Python versions have changed with this release. ' Each time I loop through, I want to capture the first table name and store it. car, t2. get_type() ¶. AND SALARY <= 3000; I initially started to write my own parser in python but got really stumped and decided look We would like to show you a description here but the site won’t allow us. parse(query)[0]. I have a simple code to fetch the columns until the "from" keyword is reached. Use. So basically once I grep the Create table statement then I can use SQLparse to do other stuff. I'm looking for a python (3+) library that would extract the table names that are contained in the from clauses. We need to understand what the SQL is mainly for. cur = db. 5+ and released under the terms of the New BSD license . language_id = language. Just convert all multiple sequences of spaces (including newlines) to a single space, than you'll get a single line, and cat look for your table names using a regular expression. dt_unix<=86400 and B. left join cars t2. I'm trying to parse a SQL code and extract all the table names from it. We would like to show you a description here but the site won’t allow us. Pipeline: Your Data Engineering Resource. ID=B. So if you do something like. session_id inner join python sqlparse get table name技术、学习、经验文章掘金开发者社区搜索结果。掘金是一个帮助开发者成长的社区，python sqlparse get table name技术文章由稀土上聚集的技术大牛和极客共同编辑为你筛选出最优质的干货，用户每天都可以在这里找到技术世界的头条内容，我们相信你也可以在这里有所收获。 Aug 10, 2020 · Here, I just want to get the complete create table statement for the first table and then print, then go for the next table. tokens: if isinstance(i, Identifier): print(i) print(i. table2 Target Tables: db1. s += " FROM information_schema. cursor() # Execute the query: To get the name of the tables from a specific database # replace only the my_database with the name of your database cur. id = t2. Published in. M_CLOSE. Contribute to MariaPet/sqlparse development by creating an account on GitHub. To install sqlparse module. And to understand that is current entity you need to check Dict like: if 'table_name' in dict - this is a table, if 'type_name' - this is a type & etc. g: query = "select id,fname,lname,address sqlparse. This method is recursively called for all child tokens. The sqlparse module provides the following functions on module-level. I've been working with the extract_table_names. owner_id = t2. How do I get column names from rest of the query. flatten() ¶. Pingcap parser is a MySQL May 22, 2024 · From command line. sqlparse 0. Jul 5, PySqlParse. Extracts column names and tables used by the query. If INSERT or CREATE is inserted, blood relationship analysis is necessary. Oct 28, 2021 · I'm already using sqlparse to get table names, but now I'm wondering if its possible to get a nested dictionary with the query tree/hierarchy allowing to create a tree-view like below: The result would be something like: Jun 27, 2015 · 6. Here are a couple of example from the sql-metadata github readme: >>> sql_metadata. Can someone help me regarding this matter. The returned value is a string holding an upper-cased reprint of the first DML or DDL keyword. 它可以将复杂的SQL语句解析成易于阅读和理解的结构化格式，并提供了一些有用的功能，如SQL语句的格式化、分析等。. Although it has been answered by Kalu, but the query mentioned returns tables + views from postgres database. 4%. execute("SELECT table_name FROM Apr 8, 2019 · I want to get table name from 'FROM' and 'JOIN'. import sqlparse. Sep 2, 2016 · I need to built a mini-sql engine in python. parse(sql) Sep 20, 2019 · I am trying to extract all the column names from a given SQL query ( MySQL to start with). connect(host='127. Aug 20, 2022 · PySqlParse. Cat4 = "B") and B. From this query, I want to get the table name Suppliers and its query type SELECT. Is there a way to do it using PL/SQL ? Is there a PL/SQL script available to parse and extract column names Dec 24, 2021 · sql-metadata. from table1 as t1. PostgreSQL. SQL Parser and Formatter for Rust. format '1'. The parser generated object Column does not know its tablename. full outer join table2 as t2. vn by wq yt lj gv bu rk oh sg