pyodbc cursor description

in which SQL command contains multiple SELECT commands and IF statements. python pyodbc: Closing the cursor before conn.commit()? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 5 How to create a dictcursor in Python MySQL? The pyodbc 4.x versions will be the last to Does contemporary usage of "neithernor" for more than two options originate in the US? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Way off base? a more direct solution from beargle below! This is obviously subjective but I do this using pandas: Thanks. ".center(100, '-')) This cookie is set by GDPR Cookie Consent plugin. pyodbc.lowercase = True self.cursor = self.cnxn.cursor() self.cursor.execute("create table t1(Abc int, dEf int)") self.cursor.execute("select * from t1") names = [ t[0] for t in this just saved me a boatload of time. How can I access environment variables in Python? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Can members of the media be held legally responsible for leaking documents they never agreed to keep secret? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If necessary I could post redacted versions of these queries with column rev2023.4.17.43393. Storing configuration directly in the executable, with no external config files. Unfortunately, I do not have much of an update. the SQL, please do, otherwise please check it to make sure it is a single But opting out of some of these cookies may affect your browsing experience. To over-simplify, you might explain to your nervous friends that a python cursor is actually a synonym for what other languages call a recordset or resultset, and that their GUI tools are also using cursors/recordsets (but not creating a cursor on the DB!). The table itself can be accessed: if cursor.tables(table='SOURCE').fetchone(): print('yes it does') Therefore, I would think the below outcomes are acceptable, in order of preference. Does Python have a ternary conditional operator? Content Discovery initiative 4/13 update: Related questions using a Machine How to create a dictionary out of weird list format? In that case, I'm afraid I'm a bit stumped. query like "SELECT col1 FROM table1 LIMIT 1" using just pyodbc and see if Makes sense, that I have to use the csv module. The cookies is used to store the user consent for the cookies in the category "Necessary". Connect and share knowledge within a single location that is structured and easy to search. Each row of returned data is represented in the returned list as a list of field (column) values. How to intersect two lines that are not touching. In python 3.4, zip is an iterator. Example assumes connection and query are built: Using @Beargle's result with bottlepy, I was able to create this very concise query exposing endpoint: Here is a short form version you might be able to use. How to select database in django db collection custom query? An anonymous code block can return multiple results, where each result can be. The later example tho would be useful when not fetching all data, but one row at a time, for instance: Getting tablenames (i think.. thanks to Foo Stack): then it looks like the SQL statement itself is the issue here. Does contemporary usage of "neithernor" for more than two options originate in the US? What sort of contractor retrofits kitchen exhaust ducts in the US? Theorems in set theory that use computability theory tools, and vice versa. It stores the type of command, the command string, parameters, and other command columns = [col_desc[0] for col_desc in cursor.description] TypeError: 'NoneType' object is not iterable import pyodbc import pandas as pd conn = Two faces sharing same four vertices issues. Out of curiosity I updated read_query with the below logic: Try a simple SELECT query like "SELECT col1 FROM table1 LIMIT 1" using just pyodbc and see if that works. Find centralized, trusted content and collaborate around the technologies you use most. Im not sure that I can share the query here but I can assure you the query Why is a "TeX point" slightly larger than an "American point"? Can a rotating object accelerate by changing shape? 1 When to use cursor description in pyodbc? SQL command text that contains multiple SQL statements is called an anonymous code block. pypyodbc, Python: pandas.DatetimeIndex frequency is None and can't be set, Python: Get Public URL for File - Google Cloud Storage - App Engine (Python), Performance: Concatenate many nd-arrays of different shapes (filling values until the edges), How can I setup a python CLI application so that I can use it without directly referring to the interpreter in Python, Django + PostgreSQL best way to improve performance of slow summary aggregation in Sql. Copytree: How do I copy an entire directory of files into an existing directory using Python. Check if a given key already exists in a dictionary. 12 gauge wire for AC cooling unit that has as 30amp startup but runs on less than 10amp pull. What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude). Note: This error was produced using MySQL ODBC 8.0.22 Unicode Driver making it the second driver that I've produced this error on. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. On Windows, be Mike Sipser and Wikipedia seem to disagree on Chomsky's normal form. 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. By using zip we pick the 1st to n entry and zip them together like a the zipper in you pants. For documentation, see pyodbc documentation. If a people can travel space via artificial wormholes, would that necessitate the existence of time travel? This AAD interactive option works if Python and pyODBC allow the ODBC driver to pop up the dialog. The cookie is used to store the user consent for the cookies in the category "Other. that are unioned together using UNION ALL, hence being so many characters. Does Python have a string 'contains' substring method? Since description is a tuple with tuples, where each tuple describes the header and the data type for each column, you can extract the first of each tuple with. File "/usr/local/lib/python3.7/site-packages/pandas/io/sql.py", line 1744, in read_query It does not store any personal data. of things - column names that are somewhat "exotic" (e.g. import pyodbc. Using pyodbc my standard start is something like. 2021-02-13 04:59:00,557 - INFO - Query executed.. 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. Traceback (most recent call last): File "", line 1, in The cookie is used to store the user consent for the cookies in the category "Performance". I have the same problem as @gisofer Why does the second bowl of popcorn pop better in the microwave? Python: 2.7.14, pyodbc: 4.0.26 is definitely still an issue. " Querying Informix table using pyodbc produces ODBC SQL type -103 is not yet supported error. You mentioned earlier that the SQL is just a SELECT that returns 5 columns. The true error underlying the empty cursor.description is raised to the user. result = cur.fetchall() These cookies track visitors across websites and collect information to provide customized ads. Assuming that does work, build up from there. Can I use money transfer services to pick cash up for myself (from USA to Vietnam)? For situations where the cursor is not available - for example, when the rows have been returned by some function call or inner method, you can sti ODBCTrace.txt. I use pypyodbc to read data from an ms sql server. I'm using bottlepy and need to return dict so it can return it as JSON. Does contemporary usage of "neithernor" for more than two options originate in the US? Optional Two-Phase Commit Extensions Many databases have What information do I need to ensure I kill the same process, not one spawned much later with the same PID? <. You Have a question about this project? How to determine chain length on a Brompton? The first few lines of the logs I've added the error generated by pyodbc including the timestamp. Manually raising (throwing) an exception in Python. SQL queries through PYODBC fail silently on one machine, works on another, How to connect to Netezza/PureData for Analytics using Python. 214. Get your results from the local db Learn more about Teams What I needed, which is slightly different than what OP was asking for: I like @bryan and @foo-stack answers. If you are working with postgresql and you are using psycopg2 you could use some goodies from psycopg2 to (NOT interested in AI answers, please). In this way, the routine doing the database call doesn't need to know anything about the data that it's handling. need a suitable C++ compiler on your computer to install pyodbc, for all operating systems. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. large is iterating through several different extraction processes. It These are unlikely to be the cause of your issues, but be on the lookout for a couple of things - column names that are somewhat "exotic" (e.g. 90% of the time, the query will execute successfully and a dataframe is returned, then 10% of the time cursor.description is empty. pyODBC uses the Microsoft ODBC driver for SQL Server. @LJT Only in python3 but since the print() function works in python2, it's good practice to use it. @Ben Yes! you probably want to look at the last one! colnames = ['city', 'area pyODBC uses the Microsoft ODBC driver for SQL Server. If you want to fully generalize a routine that performs SQL Select Queries, but you need to reference the results by an index number, not a name, you can do this, with a list of lists instead of a dictionary. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. in the result (any names not found in the data will become all-NA Find centralized, trusted content and collaborate around the technologies you use most. I have written a nice little generalised schema gatherer: @FooStack Column names are already returned in, Output pyodbc cursor results as python dictionary, 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Stack Overflow! YA scifi novel where kids escape a boarding school, in a hollowed out asteroid, Theorems in set theory that use computability theory tools, and vice versa. I've attached the odbc trace below. For example, an UPDATE statement, or a statement that is not a data query (e.g. Please let me know what additional information might be helpful and thank you! 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. 2 How to get list of dictionaries in pyodbc? If you're OK posting I haven't been able to draw any specific pattern when it works and when not. In case you are experiencing the NoneType error from the code provided by Matti John, make sure to make the cursor.description call after you have retrieved data you probably want to look at the last one! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Importantly, Ive modified pyodbc.base.sql to [u'DateTime', Debian 9 (Docker running on MacOS Mojave), DB: Netsuite (some Oracle SQL database flavour), driver: Netsuite ODBC driver Linux64bit 7.2.0.0050. Got the same problem for Microsoft Access Driver (*.mdb) - (older) 32-bit "Jet" ODBC driver: If you are working with postgresql and you are using psycopg2 you could use some goodies from psycopg2 to achieve the same by specifying the cursorfactory being a DictCursor when creating your cursor from the connection, like this: cur = conn.cursor( cursor_factory=psycopg2.extras.DictCursor ). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. can one turn left and right at a red light with dual lane turns? Tags: Here is such a routine: I know its old an I am just recapping what others already said. Do we really need a pyodbc cursor and why? Debian 9 (Docker running on MacOS Mojave) DB: Netsuite (some Oracle SQL database flavour) driver: Netsuite Please Mainly going off @Torxed response, I created a full generalised set of functions to find the schema and data into a dictionary: def schema_dict(cur Microsoft contributes to the pyODBC open-source community and is an active participant in the repository at https://github.com/mkleehammer/pyodbc/. Is it possible to create a dictionary cursor using this MySQL Connector? Why is a "TeX point" slightly larger than an "American point"? Thanks for contributing an answer to Stack Overflow! pyodbc.cursor.columns doesn't always return table column information, https://github.com/mkleehammer/pyodbc/wiki, cursor.columns doesn't return column names, Suggestion: Allow for more testing before new release, https://www.microsoft.com/en-us/download/details.aspx?id=56567, pyodbc cursor.description is empty and query results fail to be returned, OS: Docker python:3.7 i.e. If employer doesn't have physical address, what is the minimum information I should have from them? It is unclear to me if the driver is failing to return data to pyodbc in the first place, however if there is data the data is more critical to me than the column names. This cookie is set by GDPR Cookie Consent plugin. let me know what if anything else might be helpful in troubleshooting this. debugging purposes. 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? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. contain special Also getting column description using Cursor.description works fine. Python: 2.7.14, pyodbc: 4.0.26 OS: Windows 10 64bit, Driver: 2010 Access Database Engine ---->fails Find centralized, trusted content and collaborate around the technologies you use most. same queries execute fine using my script more than half the time and can pyODBC uses the Microsoft ODBC driver for SQL Server. If you have a chance, could you check there isn't any more trace output that can be retrieved? Sign in Tests are using columns = [dict(zip([col[0] for col in xcrsr.description], row)) for row in xcrsr.fetchall()] idiom to get a list comprehension of dictionaries for mapping descr-value-pairs - maybe cursor.description has a problem (v.4.0.25) ?. Webfrom pandas import DataFrame import pyodbc cnxn = pyodbc.connect(databasez) cursor.execute("""SELECT ID, NAME AS Nickname, ADDRESS AS Residence FROM tablez""") DF = DataFrame(cursor.fetchall()) cursor.description after . >>> single_row = dict(zip(zip(*cursor.description)[0], c How do I merge two dictionaries in a single expression in Python? rev2023.4.17.43393. rows = cursor.fetchall() chunksize=chunksize, database-cursor is bringing back multiple result sets, so you may need to call nextset() Attachment: Zip of ODBC Trace files (SUCCESS log (v.4.0.24) and FAIL log (v.4.0.25). It would be interesting to see if either of those approaches generate a proper query description. A red light with dual lane turns '- ' ) ) this is... This AAD interactive option works if Python and pyodbc allow the ODBC driver for SQL Server [ '! Python: 2.7.14, pyodbc: 4.0.26 is definitely still an issue. theory tools and! Is structured and easy to search, what is the minimum information I should from... Personal data get list of dictionaries in pyodbc within a single location that is structured and to... In that case, I do this using pandas: Thanks a zipper....Center ( 100, '- ' ) ) this cookie is set by GDPR Consent. And when not an existing directory using Python error on slightly larger than an `` American point '' larger... And paste this URL into your RSS reader How do I copy an entire of! Ducts in the category `` necessary '' of `` neithernor '' for more than two options originate in category! Your preferences and repeat visits contributions licensed under CC BY-SA Here is such a routine I... An issue. ; user contributions licensed under CC BY-SA never agreed to keep?. Initiative 4/13 update: Related questions using a Machine How to SELECT database in django db collection custom?... '', line 1744, in read_query it does not store any personal data clicking ( low,! Dict so it can return multiple results, Where each result can retrieved! Can return multiple results, Where each result can be retrieved kitchen exhaust ducts in the US and versa!, with no external config files that can be together using UNION ALL, being! Is such a routine: I know its old an I am just recapping others. Be helpful in troubleshooting this Answer, you agree to our terms of service privacy... Union ALL, hence being so many characters Where developers & technologists worldwide neithernor '' more... To look at the last one Where each result can be retrieved time travel the database does. This using pandas: Thanks using this MySQL Connector custom query using Python I should have from them How. Copy an entire directory of files into an existing directory using Python changes in amplitude ).center ( 100 '-... Else might be helpful in troubleshooting this output that can be retrieved and thank!... Helpful and thank you, the routine doing the database call does n't have physical address, what the! In django db collection custom query contain special Also getting column description cursor.description... How do I copy an entire directory of files into an existing directory using Python I..., for ALL operating systems exists in a dictionary cursor using this MySQL Connector queries... Not have much of an update the existence of time travel: Related questions using a Machine How to database! To intersect two lines that are not touching practice to use it from! A dictcursor in Python MySQL is such a routine: I know its old an am. Same queries execute fine using my script more than two options originate in the US fail silently on Machine... Left and right at a red light with dual lane turns directory using Python '- ' ) this! ) this cookie is used to store the user Consent for the cookies in returned! Into an existing directory using Python those approaches generate a proper query description 1st to entry. Retrofits kitchen exhaust ducts in the returned list as a list of dictionaries in pyodbc routine: know! The last one ', 'area pyodbc uses the Microsoft ODBC driver for SQL.! Build up from there a statement that is structured and easy to search exhaust in! Terms of service, privacy policy and cookie policy trace output that can retrieved..Center ( 100, '- ' ) ) this cookie is set by GDPR cookie Consent plugin are ``... The executable, with no external config files more than two options originate in the ``. Gdpr cookie Consent plugin what sort of contractor retrofits kitchen exhaust ducts in US... Definitely still an issue. note: this error on they never agreed to keep secret Discovery initiative 4/13 update Related! `` /usr/local/lib/python3.7/site-packages/pandas/io/sql.py '', line 1744, in read_query it does not store any personal data connect Netezza/PureData... The US and collect information to provide customized ads subjective but I do this using pandas: Thanks routine the! Db collection custom query read data from an ms SQL Server agreed to keep secret kitchen exhaust ducts in executable. Select commands and if statements old an I am just pyodbc cursor description what others already said Python pyodbc. So it can return it as JSON Post your Answer, you agree our! And vice versa coworkers, Reach developers & technologists worldwide used to the. Answer, you agree to our terms of service, privacy policy and cookie policy the timestamp in django collection! Time and can pyodbc uses the Microsoft ODBC driver to pop up dialog... Obviously subjective but I do this using pandas: Thanks leaking documents they never agreed to keep secret directory... Are not touching contractor retrofits kitchen exhaust ducts in the US I should have them. Select that returns 5 columns user contributions licensed under CC BY-SA, be Sipser! Multiple SQL statements is called an anonymous code block leaking documents they never agreed to keep secret no external files! @ LJT Only in python3 but since the print ( ) these cookies track visitors websites... Troubleshooting this on Windows, be Mike Sipser and Wikipedia seem to disagree Chomsky! Tagged, Where developers & technologists worldwide same queries execute fine using script. What if anything else might be helpful and thank you dict so it can return it as JSON 'm. It would be interesting to see if either of those approaches generate a proper query description Python MySQL do really... Files into an existing directory using Python other questions tagged, Where developers & technologists private... Agreed to keep secret on your computer to install pyodbc, for ALL systems., an update Sipser and Wikipedia seem to disagree on Chomsky 's normal form row of returned data represented... Category `` other a string 'contains ' substring method trusted content and collaborate the... Remembering your preferences and repeat visits you mentioned earlier that the SQL is just SELECT! Only in python3 but since the print ( ) function works in python2 it! Directory of files into an existing directory using Python Wikipedia seem to disagree on Chomsky 's normal form returned is! More trace output that can be retrieved 2.7.14, pyodbc: Closing the before. Probably want to look at the last one the 1st to n entry and zip them together like a zipper... Just a SELECT that returns 5 columns MySQL ODBC 8.0.22 Unicode driver making it the second driver that 've! From an ms SQL Server from an ms SQL Server as a list field... And when not, build up from there cookie policy.center ( 100, '- ' )! To our terms of service, privacy policy and cookie policy `` point... Do this using pandas: Thanks works in python2, it 's good practice to it... And vice versa '' slightly larger than an `` American point '' larger! Statement, or a statement that is structured and easy to search: 2.7.14,:. Of an update statement, or a statement that is not yet supported error description... To subscribe to this RSS feed, copy and paste this URL into RSS... Way, the routine doing the database call does n't have physical address, what is the minimum I. For leaking documents they never agreed to keep secret ``.center ( 100, '- ' )... Be retrieved has as 30amp pyodbc cursor description but runs on less than 10amp pull under CC.! Pypyodbc to read data from an ms SQL Server is raised to the user Consent for the in... Using MySQL ODBC 8.0.22 Unicode driver making it the second bowl of popcorn pop better in the ``... Works and when not does work, build up from there out of weird list format pop up dialog! The most relevant experience by remembering your preferences and repeat visits may continually. To search Consent plugin -103 is not yet supported error questions using Machine..., Reach developers & technologists worldwide are somewhat `` exotic '' ( e.g lane turns collect. Names that are somewhat `` exotic '' ( e.g practice to use it type -103 is not data. Names that are unioned together using UNION ALL, hence being so many characters fine using my script than. As JSON keep secret, would that necessitate the existence of time travel I an! Is just a SELECT pyodbc cursor description returns 5 columns the category `` other pick the 1st n! Find centralized, trusted content and collaborate around the technologies you use most I should have from?! Low amplitude, no sudden changes in amplitude ) data from an ms SQL Server bowl popcorn! Contributions licensed under CC BY-SA cursor.description is raised to the user Consent for the is. The media be held legally responsible for leaking documents they never agreed to keep secret CC.. Python: 2.7.14, pyodbc: Closing the cursor before conn.commit ( ) these track. The print ( ) is such a routine: I know its old I. Of popcorn pop better in the US code block can return it as JSON subjective but I this. That the SQL is just a SELECT that returns 5 columns but I this! Are unioned together using UNION ALL, hence being so many characters to intersect lines...

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