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#------------------------------------------------------------------------------

# soda_basic.py

# A basic Simple Oracle Document Access (SODA) example.

# This script requires cx_Oracle 7.0 and higher.

# Oracle Client must be at 18.3 or higher.

# Oracle Database must be at 18.1 or higher.

# The user must have been granted the SODA_APP privilege.

#------------------------------------------------------------------------------

import cx_Oracle as oracledb

import sample_env

connection = oracledb.connect(sample_env.get_main_connect_string())

# The general recommendation for simple SODA usage is to enable autocommit

connection.autocommit = True

# Create the parent object for SODA

soda = connection.getSodaDatabase()

# drop the collection if it already exists in order to ensure that the sample

# runs smoothly each time

collection = soda.openCollection("mycollection")

if collection is not None:

collection.drop()

# Explicit metadata is used for maximum version portability.

# Refer to the documentation.

metadata = {

"keyColumn": {

"name": "ID"

"contentColumn": {

"name": "JSON_DOCUMENT",

"sqlType": "BLOB"

"versionColumn": {

"name": "VERSION",

"method": "UUID"

"lastModifiedColumn": {

"name": "LAST_MODIFIED"

"creationTimeColumn": {

"name": "CREATED_ON"

}

# Create a new SODA collection and index

# This will open an existing collection, if the name is already in use.

collection = soda.createCollection("mycollection", metadata)

index_spec = {

'name': 'CITY_IDX',

'fields': [

{

'path': 'address.city',

'datatype': 'string',

'order': 'asc'

}

]

}

collection.createIndex(index_spec)

# Insert a document.

# A system generated key is created by default.

content = {'name': 'Matilda', 'address': {'city': 'Melbourne'}}

doc = collection.insertOneAndGet(content)

key = doc.key

print('The key of the new SODA document is: ', key)

# Fetch the document back

doc = collection.find().key(key).getOne() # A SodaDocument

content = doc.getContent() # A JavaScript object

print('Retrieved SODA document dictionary is:')

print(content)

content = doc.getContentAsString() # A JSON string

print('Retrieved SODA document string is:')

print(content)

# Replace document contents

content = {'name': 'Matilda', 'address': {'city': 'Sydney'}}

collection.find().key(key).replaceOne(content)

# Insert some more documents without caring about their keys

content = {'name': 'Venkat', 'address': {'city': 'Bengaluru'}}

collection.insertOne(content)

content = {'name': 'May', 'address': {'city': 'London'}}

collection.insertOne(content)

content = {'name': 'Sally-Ann', 'address': {'city': 'San Francisco'}}

collection.insertOne(content)

# Find all documents with names like 'Ma%'

print("Names matching 'Ma%'")

documents = collection.find().filter({'name': {'$like': 'Ma%'}}).getDocuments()

for d in documents:

content = d.getContent()

print(content["name"])

# Count all documents

c = collection.find().count()

print('Collection has', c, 'documents')

# Remove documents with cities containing 'o'

print('Removing documents')

c = collection.find().filter({'address.city': {'$regex': '.*o.*'}}).remove()

print('Dropped', c, 'documents')

# Count all documents

c = collection.find().count()

print('Collection has', c, 'documents')

# Drop the collection

if collection.drop():

print('Collection was dropped')

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