Connecting-To: Configuring the ODBC run-time environment on Linux

Mon, 01 Jan 0001 00:00:00 +0000

To configure the ODBC run-time environment on Linux:

Create the odbc.ini file if it does not already exist.
Add the ODBC driver directory to the LD_LIBRARY_PATH system environment variable:
```
export LD_LIBRARY_PATH=/path-to-vertica-odbc-driver:$LD_LIBRARY_PATH
```
Important
If you skip Step 2, the ODBC manager cannot find the driver in order to load it.

These steps are relevant only for unixODBC and iODBC. See their respective documentation for details on odbc.ini.

Connecting-To: Querying the database with pyodbc

Mon, 01 Jan 0001 00:00:00 +0000

The example session below uses pyodbc with the OpenText™ Analytics Database ODBC driver to connect Python to the database.

Note

SQLFetchScroll and SQLFetch functions cannot be mixed together in iODBC code. When using pyodbc with the iODBC driver manager, skip cannot be used with the fetchall, fetchone, and fetchmany functions.

Example script

The following example script shows how to query the database using Python 3, pyodbc, and an ODBC DSN.


import pyodbc
cnxn = pyodbc.connect("DSN=VerticaDSN", ansi=True)
cursor = cnxn.cursor()
# create table
cursor.execute("CREATE TABLE TEST("
    "C_ID  INT,"
    "C_FP  FLOAT,"
    "C_VARCHAR VARCHAR(100),"
    "C_DATE DATE, C_TIME TIME,"
    "C_TS TIMESTAMP,"
    "C_BOOL BOOL)")
cursor.execute("INSERT INTO test VALUES(1,1.1,'abcdefg1234567890','1901-01-01','23:12:34','1901-01-01 09:00:09','t')")
cursor.execute("INSERT INTO test VALUES(2,3.4,'zxcasdqwe09876543','1991-11-11','00:00:01','1981-12-31 19:19:19','f')")
cursor.execute("SELECT * FROM TEST")
rows = cursor.fetchall()
for row in rows:
    print(row, end='\n')
cursor.execute("DROP TABLE TEST CASCADE")
cursor.close()
cnxn.close()

The resulting output displays:

(2, 3.4, 'zxcasdqwe09876543', datetime.date(1991, 11, 11), datetime.time(0, 0, 1), datetime.datetime(1981, 12, 31, 19, 19, 19), False)
(1, 1.1, 'abcdefg1234567890', datetime.date(1901, 1, 1), datetime.time(23, 12, 34), datetime.datetime(1901, 1, 1, 9, 0, 9), True)

Notes

SQLPrimaryKeys returns the table name in the primary (pk_name) column for unnamed primary constraints. For example:

Unnamed primary key:

CREATE TABLE schema.test(c INT PRIMARY KEY);

SQLPrimaryKeys
"TABLE_CAT", "TABLE_SCHEM", "TABLE_NAME", "COLUMN_NAME", "KEY_SEQ", "PK_NAME" <Null>, "SCHEMA", "TEST", "C", 1, "TEST"

Named primary key:

CREATE TABLE schema.test(c INT CONSTRAINT pk_1 PRIMARY KEY);

SQLPrimaryKeys
"TABLE_CAT", "TABLE_SCHEM", "TABLE_NAME", "COLUMN_NAME", "KEY_SEQ", "PK_NAME" <Null>, "SCHEMA", "TEST", "C", 1, "PK_1"

OpenText recommends that you name your constraints.

OpenText Analytics Database 26.2.x – Python

Connecting-To: Configuring the ODBC run-time environment on Linux

Important

See also

Connecting-To: Querying the database with pyodbc

Note

Example script

Notes

See also