UPDATE statement, or a statement that is not a data query (e.g. 2021-02-13 04:55:27,916 - INFO - Cursor initiated.. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. pyodbc.ProgrammingError: No results. Perhaps you could try re-running the code without the chunk size (instead use LIMIT to bring back just a few rows), or you could try taking pandas and/or SQLAlchemy out of the picture and call pyodbc directly. How can I delete a file or folder in Python? This article provides step-by-step guidance for installing and using the Python SQL Driver, pyODBC. This is obviously subjective but I do this using pandas: Thanks. How do I concatenate two lists in Python? Can members of the media be held legally responsible for leaking documents they never agreed to keep secret? result = cursor.fetchall() 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. To learn more, see our tips on writing great answers. @BenyGj Yeah, this is not intended for large amounts of data. chunksize=chunksize, ODBCTrace.txt. columns = [col_desc[0] for col_desc in cursor.description] 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 , , , , . cursor.close(). 9. Evaluating the limit of two sums/sequences. Does Python have a string 'contains' substring method? Step 1: Configure development environment for pyodbc Python development. In the scenario you described, I would normally expect a column count of 5. The with keyword is what you are looking for. 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. The trace ends just as the SQL query is executed (the SQL that starts with "WITH NewEncounters AS"). example and 1961 characters long in your latest example. Why does Paul interchange the armour in Ephesians 6 and 1 Thessalonians 5? The problem is that with Cursor.columns sometimes I get data and sometimes not. TypeError: 'NoneType' object is not iterable. Reference: is this exposed to SQL injection attacks? Optional Two-Phase Commit Extensions Many databases have <. Q&A for work. u'DecSecond', Asking for help, clarification, or responding to other answers. sure to specify 32-bit Python or 64-bit: I can execute queries against database and get data very reliably. print("Columns are none!!!!!!! Is there a way to use any communication without a CPU? I overpaid the IRS. Why don't objects get brighter when I reflect their light back at them? 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. Logs: What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude). The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Lastly, there's always the remote possibility your query What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude). What kind of tool do I need to change my bottom bracket? For documentation, see pyodbc documentation. But opting out of some of these cookies may affect your browsing experience. Thought I would update that this issue has randomly reappeared for me now, don't have any background just yet. What does the SwingUtilities class do in Java? They're often a source of performance problems, and a set-based approach is almost always better. It seems the issue is somehow related to a timeout or something similar in By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I haven't been able to draw any specific pattern when it works and when not. Here is a short form version you might be able to use >>> cursor.select("") Attachment: Zip of ODBC Trace files (SUCCESS log (v.4.0.24) and FAIL log (v.4.0.25). 90% of the time, the query will execute successfully and a dataframe is returned, then 10% of the time cursor.description is empty. The table itself can be accessed: if cursor.tables(table='SOURCE').fetchone(): print('yes it does') Not the answer you're looking for? Database cursors map to ODBC handles statements (HSTMTs). fetch all the rows in the memory it's a very bad idea. The cookie is used to store the user consent for the cookies in the category "Other. Im not sure that I can share the query here but I can assure you the query 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 ). The issue has not appeared again since.. Example mentioned earlier that the SQL is just a SELECT that returns 5 columns. Yes, it's called SQL syntax. Step 2: Import pyodbc in insert Python Script This next step, is to import pyodbc in your Pthon script using one below comment: import pyodbc Step 3: Set the Association String Now its time to set our connection string. associated with them, this argument provides names for the The server is a client server and therefore I am unable to upgrade MySql version, however the issue occurs both on MySql 8 and MySql 5.6. Necessary cookies are absolutely essential for the website to function properly. import sqlalchemy Does Chain Lightning deal damage to its original target first? So the user chooses what suits him in which case. to your account, Stack trace: How to determine chain length on a Brompton? 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. Will let you know what if any difference this makes. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, needed to wrap parentheses around print (columns) and print (results) for this to work. Following workaround is working reliable for both versions v.4.0.24 and v.4.0.25: Edit (2019-01-16): columns : sequence, default None Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Are you sure your SQL is just a SELECT 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. (NOT interested in AI answers, please). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. My script at import pyodbc else: By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. That seems odd. Querying Informix table using pyodbc produces ODBC SQL type -103 is not yet supported error. @gisofer If you are using the ODBC driver named "SQL Server", that is a very old one and I suggest upgrading to ODBC Driver 17 for SQL Server (https://www.microsoft.com/en-us/download/details.aspx?id=56567). The query only produces ~500,000 records. 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. Also getting column description using Cursor.description works fine. execute fine. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. pyodbc: 4.0.25 Are you sure your SQL is just a SELECT statement, or is it a SQL script that includes multiple SQL statements? 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) ?. a more direct solution from beargle below! import pyodbc. The text was updated successfully, but these errors were encountered: What version of unixODBC are you using? cursor.execute(sql_query) almost certainly not a SELECT statement but something else. no data for table columns is available. Debian 9 (Docker running on MacOS Mojave) DB: Netsuite (some Oracle SQL database flavour) driver: Netsuite Find centralized, trusted content and collaborate around the technologies you use most. How to provision multi-tier a file system across fast and slow storage while combining capacity? Thanks for contributing an answer to Stack Overflow! Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Have a question about this project? <. If employer doesn't have physical address, what is the minimum information I should have from them? ".center(100, '-')) 2021-02-13 04:55:27,546 - INFO - Attempting to connect to 192.168.20.117 Python: 2.7.14, pyodbc: 4.0.26 is definitely still an issue. " In that case, I'm afraid I'm a bit stumped. rows = cursor.fetchall() This seems to be the same as #506 which is fixed in master but not yet released. These cookies ensure basic functionalities and security features of the website, anonymously. then it looks like the SQL statement itself is the issue here. How can I detect when a signal becomes noisy? If dealing with small enough tables, you will not see a difference. On the other hand this option works and gives the column names: columns = [column[0] for column in cursor.description] In this way, the routine doing the database call doesn't need to know anything about the data that it's handling. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The following are 30 code examples for showing how to use django.db.connection.cursor () . second query that I posted about is technically a few different selects How can I test if a new package version will pass the metadata verification step without triggering a new package version? 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 This cookie is set by GDPR Cookie Consent plugin. ***> wrote: f"Trusted_Connection=no" How to select database in django db collection custom query? Each row of returned data is represented in the returned list as a list of field (column) values. 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. Out of curiosity I updated read_query with the below logic: TypeError: 'NoneType' object is not iterable in Python, TypeError: 'module' object is not callable, Converting a Pandas GroupBy output from Series to DataFrame, Use a list of values to select rows from a Pandas dataframe, Get a list from Pandas DataFrame column headers, How to filter Pandas dataframe using 'in' and 'not in' like in SQL, "TypeError: a bytes-like object is required, not 'str'" when handling file content in Python 3. Assuming that does work, build up from there. Good answer. I like @bryan and @foo-stack answers. IMPORTANT: Python 2.7 support is being ended. Using pyodbc my standard start is something like. However, this software doesn't come with Microsoft support. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. As you might be aware when you add * to a list you basically strips away the list, leaving the individual list entries as parameters to the function you are calling. Older version however, "expected behavior" SQL command text that contains multiple SQL statements is called an anonymous code block. 4 How to use Django DB connection cursor in Python? this just saved me a boatload of time. pyODBC uses the Microsoft ODBC driver for SQL Server. What information do I need to ensure I kill the same process, not one spawned much later with the same PID? ***> wrote: Content Discovery initiative 4/13 update: Related questions using a Machine SQL Server stored procedure in Python pyodbc. Mike Sipser and Wikipedia seem to disagree on Chomsky's normal form. What I needed, which is slightly different than what OP was asking for: 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. columns I imagine the creators of MySQL would eventually do this for us? also execute successfully when using DBeaver. If necessary I could post redacted versions of these queries with column Connect and share knowledge within a single location that is structured and easy to search. This AAD interactive option works if Python and pyODBC allow the ODBC driver to pop up the dialog. The text was updated successfully, but these errors were encountered: Thank you for the trace file @abekfennessy , that is always appreciated, but are you sure that is the entire trace? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Why is a "TeX point" slightly larger than an "American point"? # Has to be set before creating the cursor, so we must recreate self.cursor. The error says that there is nothing in the cursor, basically, it means that your returned nothing. What is the etymology of the term space-time? What I needed, which is slightly different than what OP was asking for: If a people can travel space via artificial wormholes, would that necessitate the existence of time travel? of things - column names that are somewhat "exotic" (e.g. line 132, in query_sql 2021-02-13 04:55:27,916 - INFO - Connection initiated to 192.168.20.117 I did notice that the statement was 3222 characters long in your earlier example and 1961 characters long in your latest example. 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. Does Python have a ternary conditional operator? The easiest way to install is to use pip: If you are using Mac, you should be using Homebrew for installing pyodbc: Precompiled binary wheels are provided for most Python versions on Windows and macOS. from the most basic SQL query and work up from there. Thanks for contributing an answer to Stack Overflow! Sign up for a free GitHub account to open an issue and contact its maintainers and the community. implements the DB API 2.0 specification but is The proposed workaround is not reliable, cause cursor.columns(table=table_name) is not complete: The dataframe is returned without column names. >>> single_row = dict(zip(zip(*cursor.description)[0], c Storing configuration directly in the executable, with no external config files. columns. Yeah Ive thought about trying the same.. Ill give it a shot, thanks! In that case, I'm afraid I'm a bit stumped. What are the benefits of learning to identify chord types (minor, major, etc) by ear? Assuming that does work, build up from there. A field called "Facility Name" for example will appear as "F\x00A\x00C\x00I\x00L\x00I\x00T". But I found this way neat, as its also injection safe. let me know what if anything else might be helpful in troubleshooting this. 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. By clicking Accept All, you consent to the use of ALL the cookies. I've attached the odbc trace below. On other

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