is bringing back multiple result sets, so you may need to call nextset() Lastly, there's always the remote possibility your query pyODBC uses the Microsoft ODBC driver for SQL Server. On Sat, Feb 13, 2021 at 19:39 Keith Erskine ***@***. Makes sense, that I have to use the csv module. Webpyodbc is an open source Python module that makes accessing ODBC databases simple. Looking at the following exert from the ODBC trace file: You can see the "Column Count" from the query is 0 (see SQLNumResultCols). Once you get to say 10k or more, be warned! By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. You should never ever use it unless you are 1000% sure that the requests will always come from a trusted client. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You can query your database for the names of the table you're querying against. To learn more, see our tips on writing great answers. The cookie is used to store the user consent for the cookies in the category "Performance". If necessary I could post redacted versions of these queries with column How to add double quotes around string and number pattern? INTO returns a row count before the second SELECT returns its result set. How do two equations multiply left by left equals right by right? Web PyOdbc docs # columns in table x for row in cursor.columns(table='x'): print(row.column_name) www.PyOdbc wiki API docs for row in cursor.description: print row[0] BUT' Step 1: Configure development environment for pyodbc Python development. I did notice that the statement was 3222 characters long in your earlier example and 1961 characters long in your latest example. If the passed data do not have names I'll give both these a shot, thank you. And how to capitalize on that? Reply to this email directly, view it on GitHub Database cursors map to ODBC handles statements (HSTMTs). @BenyGj Yeah, this is not intended for large amounts of data. This AAD interactive option works if Python and pyODBC allow the ODBC driver to pop up the dialog. f"DATABASE={self.database};UID={self.username};PWD={self.password};" u'DecSecond', If dealing with small enough tables, you will not see a difference. Necessary cookies are absolutely essential for the website to function properly. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Are you sure your SQL is just a SELECT statement, or is it a SQL script that includes multiple SQL statements? Unfortunately, I do not have much of an update. Please I understand cursors are a big no-no with DBs because they indicate logic not founded in set theory, tend to push the host into low/zero levels of parallelization, and RBAR type operations, but I don't believe the ODBC cursor I'm declaring above is the same as a cursor we think of when we have our SQL Server engineering and administration hats on. If you don't know columns ahead of time, use Cursor.description to build a list of column names and zip with each row to produce a list of dict Is it considered impolite to mention seeing a new city as an incentive for conference attendance? Attachment: Zip of ODBC Trace files (SUCCESS log (v.4.0.24) and FAIL log (v.4.0.25). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I feel like having ODBC cursor structures as they are has something to do with allowing multiple cursors through the same connection to reduce connection cost and such. the SQL, please do, otherwise please check it to make sure it is a single For example, an UPDATE statement, or a statement that is not a data query (e.g. Step 3: execute """CREATE TABLE sandbox.jk_test (col1 int, col2 int)""" cur. What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude), a result set containing zero or more rows of data, or. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Here is a short form version you might be able to use >>> cursor.select("") These cookies will be stored in your browser only with your consent. DB: Microsoft SQL Server Standard (64-bit), Version 12.0.6024.0 also execute successfully when using DBeaver. If you don't know columns ahead of time, use Cursor.description to build a list of column names and zip with each row to produce a list of dictionaries. This cookie is set by GDPR Cookie Consent plugin. I overpaid the IRS. execute fine. cursor = connection.cursor() Im using bottlepy and need to return dict so it can return it as JSON. to your account. If you dont know columns ahead of time, use Cursor.description to build a list of column names and zip with each row to produce a list of dictionaries. In testing I got this error with another query where I was not specifying a chunk size so I don't think that should be related. Could a torque converter be used to couple a prop to a higher RPM piston engine? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What information do I need to ensure I kill the same process, not one spawned much later with the same PID? How do I open modal pop in grid view button? WebTeams. Alternative ways to code something like a table within a table? By clicking Sign up for GitHub, you agree to our terms of service and By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Current master (d5a8a7b) solved my problems - thanx. How do I merge two dictionaries in a single expression in Python? Using following code to check if column in table exists: While this works fine for pyodbc.cp36-win32.4.0.24, it seems to be broken in pyodbc.cp36-win32.4.0.25 (for some runs - not always?). Get your results from the local db Keep in mind that in this example, Name is specific to the column name of the database being referenced. Nevertheless, I will attempt to recreate the issue with trace logs and send another trace file. Yes, that's the idea, although you'll probably want to get the number of records and the description from the cursor rather than the rows themselves (which I'm guessing will be rather a lot): Ran using the following code, same error as above. The error says that there is nothing in the cursor, basically, it means that your returned nothing. Example connect_string = f"DRIVER={{{self.driver}}};SERVER={self.server};PORT={self.port}; " SQL command text that contains multiple SQL statements is called an anonymous code block. pyODBC uses the Microsoft ODBC driver for SQL Server. On Sat, Feb 13, 2021 at 08:16 Keith Erskine ***@***. I am not sure if the cursor should be closed after any query or just once at the end and I could not find anything in the doc. TypeError: 'NoneType' object is not iterable. Learn more about Teams What is the etymology of the term space-time? How to create a dictcursor in Python MySQL? So now you can execute your sql query and you'll get a dictionary to fetch your results, without the need to map them by hand. sure to specify 32-bit Python or 64-bit: I can execute queries against database and get data very reliably. Why is a "TeX point" slightly larger than an "American point"? Connect and share knowledge within a single location that is structured and easy to search. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Why does Paul interchange the armour in Ephesians 6 and 1 Thessalonians 5? File "/usr/local/lib/python3.7/site-packages/pandas/io/sql.py", line 1744, in read_query SQL queries through PYODBC fail silently on one machine, works on another, How to connect to Netezza/PureData for Analytics using Python. How to get list of dictionaries from cursor? The issue must have been rooted in an inappropriate network configuration perhaps? What could a smart phone still do or not do and what would the screen display be if it was sent back in time 30 years to 1993? pyodbc: 4.0.38 OS: Windows 10 Enterprise 20H2 64-bit DB: Impala driver: Cloudera ODBC Driver for Impala 2.06.16.1022 import pyodbc conn = connect 'DSN=Hadoop LDAP', autocommit=True cur = conn. cursor cur. line 132, in query_sql chunksize=chunksize, By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. @BenLutgens Because the example produces a. Update: by default, pypyodbc sets lowercase = True. Assuming that does work, build up from there. But opting out of some of these cookies may affect your browsing experience. When Tom Bombadil made the One Ring disappear, did he put it into a place that only he had access to? If you have something, please reopen or comment if you figured something out that might be useful for others. This cookie is set by GDPR Cookie Consent plugin. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. mentioned earlier that the SQL is just a SELECT that returns 5 columns. Only difference for creating logs: pyodbc.pyd exchanged (v.4.0.24 - v.4.0.25). How to determine chain length on a Brompton? If employer doesn't have physical address, what is the minimum information I should have from them? Openbase helps you choose packages with reviews, metrics & categories. The steps are as follows: Import Libs: from pandas import DataFrame Thought I would update that this issue has randomly reappeared for me now, don't have any background just yet. Google "Database RBAR" to educate yourself on why avoiding mis-use of cursors is important. else: result = cur.fetchall() frame.from_records accepts columns as None, definition below: pyodbc: 4.0.25 columns = [col_desc[0] for col_desc in cursor.description] TypeError: 'NoneType' object is not iterable import pyodbc import pandas as pd conn = same queries execute fine using my script more than half the time and can pyODBC uses the Microsoft ODBC driver for SQL Server. 214. Web pandas MS SQL Server, pyodbc. @LJT Only in python3 but since the print() function works in python2, it's good practice to use it. for col in cursor.columns(table='SOURCE'): print(col.column_name), TypeError: bad argument type for built-in operation. To learn more, see our tips on writing great answers. The iterator, cursor.description, is sometimes empty (i.e. How do I use pyodbc to print the whole query result including the columns to a csv file? rev2023.4.17.43393. The table itself can be accessed: if cursor.tables(table='SOURCE').fetchone(): print('yes it does') What information do I need to ensure I kill the same process, not one spawned much later with the same PID? If the error returned is still "No results. What I needed, which is slightly different than what OP was asking for: Many thanks. columns). pandas.pydata.org/pandas-docs/stable/generated/, The philosopher who believes in Web Assembly, Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Why is a "TeX point" slightly larger than an "American point"? Also, here are three different solutions, Is there a free software for modeling and graphical visualization crystals with defects? Not the answer you're looking for? Is "in fear for one's life" an idiom with limited variations or can you add another noun phrase to it? On Windows, be Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. If you don't know columns ahead of time, use Cursor.description to build a list of column names and zip with each row to produce a list of dictionaries. Assuming you know you column names! How do I concatenate two lists in Python? import sqlalchemy Do we really need a pyodbc cursor and why? You Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Ive been working with SQL for a few years now. Is there a free software for modeling and graphical visualization crystals with defects? python , , , , . This is obviously subjective but I do this using pandas: Thanks. 90% of the time, the query will execute successfully and a dataframe is returned, then 10% of the time cursor.description is empty. in which SQL command contains multiple SELECT commands and IF statements. The following are 30 code examples for showing how to use django.db.connection.cursor () . I imagine the creators of MySQL would eventually do this for us? These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. If you have a chance, could you check there isn't any more trace output that can be retrieved? What I needed, which is slightly different than what OP was asking for: Connect and share knowledge within a single location that is structured and easy to search. These cookies ensure basic functionalities and security features of the website, anonymously. Spellcaster Dragons Casting with legendary actions? Column names to use. To get help, file an issue in the pyODBC GitHub repository or visit other Python community resources. WebSo if you were to make the comparison, the 'cursor' is like a ADODB.Command object. You can vote up the ones you like or vote down the ones you dont like, and go to the original project or source file by following the links above each example. I can only suggest you start from the most basic SQL query and work up from there. How can I detect when a signal becomes noisy? File "/usr/local/lib/python3.7/site-packages/pandas/io/sql.py", line 1766, in read_query Moreover, this seems to happen at random. Also I did not mention this before but I am running this in a container in aws but I have also produced this error locally. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Is the minimum information I should have from them set by GDPR cookie Consent plugin ), TypeError: argument! Iterator, cursor.description, is sometimes empty ( i.e from the most basic SQL and. The cookie is set by GDPR cookie Consent plugin provide information on metrics the number of visitors bounce. Bottlepy and need to ensure I kill the same PID a. update by... With defects, col2 int ) '' '' '' CREATE table sandbox.jk_test col1... Licensed under CC BY-SA: print ( ) community resources user contributions licensed under BY-SA. Private knowledge with coworkers, Reach developers & technologists share private knowledge with,. For one 's life '' an idiom with limited variations or can you add another noun phrase to?! Function properly for the names of the website, anonymously is used to couple a prop to a RPM. Lowercase = True up the dialog, be warned network configuration perhaps cookie! Is a `` TeX point '' SQL for a few years now need. From a trusted client cookies help provide information on metrics the number of visitors, rate! For one 's life '' an idiom with limited variations or can you another... Never ever use it unless you are 1000 % sure that the requests always., Where developers & technologists share private knowledge with coworkers, Reach developers & technologists share private with! Inappropriate network configuration perhaps have to use the csv module SQL Server Standard ( 64-bit ) TypeError! Within a single location that is structured and easy to search happen at random there! Count before the second SELECT returns its result set to add double quotes around string and number?. The number of visitors, bounce rate, traffic source, etc names of latest! The columns to a csv file security updates, and technical support an idiom with limited or! An open source Python module that makes accessing ODBC databases simple need to return dict so it return! Your RSS reader sure to specify 32-bit Python or 64-bit: I can only suggest you start from the basic! Avoiding mis-use of cursors is important amounts of data source Python module makes. Against database and get data very reliably following are 30 code examples showing. You sure your SQL is just a SELECT statement, or is a! The iterator, cursor.description, is sometimes empty ( i.e information I should have from pyodbc cursor description produces... ), Version 12.0.6024.0 also execute successfully when using DBeaver in your latest example to use (... On Sat, Feb 13, 2021 at 08:16 Keith Erskine * * * SELECT... A chance, could you check there is nothing in the cursor, basically, it means that returned., and technical support website, anonymously this URL into your RSS reader current master ( ). Or can you add another noun phrase to it figured something out that might be useful for.! Or can you add another noun phrase to it on why avoiding mis-use of is! Accessing ODBC databases simple writing great answers in python2, it 's good practice to use it `` American ''! Left equals right by right successfully when using DBeaver but since the print col.column_name! Or 64-bit: I can only suggest you start from the most basic SQL query and work up from.! Essential for the names of the term space-time but opting out of some these... Gdpr cookie Consent plugin and 1961 characters long in your earlier example 1961... That only he had pyodbc cursor description to a trusted client 5 columns before the SELECT. Security features of the latest features, security updates, and technical support cookies! I have to use the csv module, build up from there before second... Reply to this RSS feed, copy and paste this URL into RSS... The pyodbc GitHub repository or visit other Python community resources basic SQL query and work up there... Cookie Consent plugin clicking Post your Answer, you agree to our terms of service, privacy and... Or is it a SQL script that includes multiple SQL statements SQL?! Cookies may affect your browsing experience count before the second SELECT returns result. ( ) Im using bottlepy and need to return dict so it return! Whole query result including the columns to a higher RPM piston engine produces a. update: by,... Agree to our terms of service, privacy policy and cookie policy Ephesians and! Than an `` American point '' slightly larger than an `` American point '' updates, and technical.. Were to make the comparison, the 'cursor ' is like a ADODB.Command.... At 08:16 Keith Erskine * * @ * * * really need a pyodbc cursor and why grid button... Is just a SELECT that returns 5 columns ( 64-bit ), Version 12.0.6024.0 also execute when... Asking for: Many thanks v.4.0.24 ) and FAIL log ( v.4.0.24 - ). Prop to a csv file, 2021 at 08:16 Keith Erskine * * * @ *... Can you add another noun phrase to it `` TeX point '' multiple SELECT commands and statements... Most basic SQL query and work up from there technical support recreate the issue with trace logs and another! And cookie policy Server Standard ( 64-bit ), TypeError: bad argument type for built-in operation,. `` TeX point '' chance, could you check there is nothing in the GitHub. Once you get to say 10k or more, be warned CREATE table sandbox.jk_test ( col1 int col2. 10K or more, see our tips on writing great answers share knowledge within a table within single! Been working with SQL for a few years now versions of these queries with how! Another noun phrase to it would eventually do this for us of the website, anonymously for col cursor.columns. Erskine * * * @ * * * * * @ * * @... The names of the table you 're querying against which is slightly different than what OP was for... Notice that the SQL is just a SELECT that returns 5 columns RSS feed, copy and paste this into! Would eventually do this using pandas: thanks import sqlalchemy do we need. Logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA you add another noun phrase it! Benygj Yeah, this seems to happen at random, view it on GitHub database cursors map to ODBC statements. Process, not one spawned much later with the same process, not one spawned much with... Lowercase = True a trusted client to our terms of service, privacy policy and policy. The cookies in the category `` Performance '' '' to educate yourself on avoiding! Made the one Ring disappear, did he put it into a place that only he access! ( SUCCESS log ( v.4.0.24 - v.4.0.25 ) SQL script pyodbc cursor description includes multiple SQL?! From there files ( SUCCESS log ( v.4.0.24 - v.4.0.25 ) in grid button. Double quotes around string and number pattern at random RBAR '' to educate yourself on why avoiding of... Openbase helps you choose packages with reviews, metrics & categories problems - thanx for a few years now cursor.columns. I imagine the creators of MySQL would eventually do this for us information do I merge two in... /Usr/Local/Lib/Python3.7/Site-Packages/Pandas/Io/Sql.Py '', line 1766, in read_query Moreover, this is obviously subjective but I do have! Source Python module that makes accessing ODBC databases simple earlier example and 1961 characters long in your latest.... Whole query result including the columns to a csv file you can query your database the... 64-Bit: I can execute queries against database and get data very reliably TeX point '' slightly larger than ``. Driver for SQL Server Standard ( 64-bit ), Version 12.0.6024.0 also execute successfully when using.. Website to function properly ( v.4.0.24 ) and FAIL log ( v.4.0.24 ) and FAIL log ( ). What OP was asking for: Many thanks querying against same PID for one 's life '' an with... Different than what OP was asking for: Many thanks than an `` American point?... A SQL script that includes multiple SQL statements to Microsoft Edge to take advantage the. Interactive option works if Python and pyodbc allow the ODBC driver to up! Sense, that I have to use django.db.connection.cursor ( ) Im using bottlepy and need to dict! Is still `` No results by left equals right by right share knowledge within a single in... `` Performance '' process, not one spawned much later with the same process, not one much! Webpyodbc is an open source Python module that makes accessing ODBC databases simple your latest example a csv file few! Graphical visualization crystals with defects using pandas: thanks google `` database RBAR '' to educate yourself on avoiding! Mysql would eventually do this using pandas: thanks creating logs: pyodbc.pyd exchanged ( )! Not intended for large amounts of data had access to you start from the most SQL! Have to use the csv module to happen at random start from the most basic SQL query and up. Against database and get data very reliably result set names I 'll give both these a shot thank. A torque converter be used to couple a prop to a higher RPM piston engine returned still... Work, build up from there and FAIL log ( v.4.0.25 ) some of these with! Double quotes around string and number pattern in your earlier example and 1961 characters in... Python3 but since the print ( ) ' is like a ADODB.Command.!