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Fix bad indentation in code snippet
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docs/performance/inserts/sequences.rst

Lines changed: 60 additions & 60 deletions
Original file line numberDiff line numberDiff line change
@@ -131,66 +131,66 @@ ID for the record we are inserting into the ``mytable`` table.
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.. code:: python
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# /// script
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# requires-python = ">=3.8"
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# dependencies = [
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# "records",
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# "sqlalchemy-cratedb",
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# ]
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# ///
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import time
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import records
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db = records.Database("crate://")
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sequence_name = "mysequence"
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max_retries = 5
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base_delay = 0.1 # 100 milliseconds
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for attempt in range(max_retries):
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select_query = """
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SELECT last_value,
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_seq_no,
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_primary_term
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FROM sequences
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WHERE name = :sequence_name;
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"""
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row = db.query(select_query, sequence_name=sequence_name).first()
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new_value = row.last_value + 1
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update_query = """
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UPDATE sequences
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SET last_value = :new_value
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WHERE name = :sequence_name
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AND _seq_no = :seq_no
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AND _primary_term = :primary_term
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RETURNING last_value;
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"""
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if (
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str(
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db.query(
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update_query,
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new_value=new_value,
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sequence_name=sequence_name,
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seq_no=row._seq_no,
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primary_term=row._primary_term,
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).all()
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)
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!= "[]"
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):
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break
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delay = base_delay * (2**attempt)
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print(f"Attempt {attempt + 1} failed. Retrying in {delay:.1f} seconds...")
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time.sleep(delay)
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else:
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raise Exception(f"Failed after {max_retries} retries with exponential backoff")
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insert_query = "INSERT INTO mytable (id, field1) VALUES (:id, :field1)"
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db.query(insert_query, id=new_value, field1="abc")
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db.close()
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# /// script
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# requires-python = ">=3.8"
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# dependencies = [
137+
# "records",
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# "sqlalchemy-cratedb",
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# ]
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# ///
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import time
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import records
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db = records.Database("crate://")
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sequence_name = "mysequence"
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max_retries = 5
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base_delay = 0.1 # 100 milliseconds
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for attempt in range(max_retries):
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select_query = """
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SELECT last_value,
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_seq_no,
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_primary_term
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FROM sequences
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WHERE name = :sequence_name;
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"""
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row = db.query(select_query, sequence_name=sequence_name).first()
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new_value = row.last_value + 1
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update_query = """
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UPDATE sequences
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SET last_value = :new_value
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WHERE name = :sequence_name
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AND _seq_no = :seq_no
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AND _primary_term = :primary_term
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RETURNING last_value;
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"""
171+
if (
172+
str(
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db.query(
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update_query,
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new_value=new_value,
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sequence_name=sequence_name,
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seq_no=row._seq_no,
178+
primary_term=row._primary_term,
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).all()
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)
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!= "[]"
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):
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break
184+
185+
delay = base_delay * (2**attempt)
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print(f"Attempt {attempt + 1} failed. Retrying in {delay:.1f} seconds...")
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time.sleep(delay)
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else:
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raise Exception(f"Failed after {max_retries} retries with exponential backoff")
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insert_query = "INSERT INTO mytable (id, field1) VALUES (:id, :field1)"
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db.query(insert_query, id=new_value, field1="abc")
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db.close()
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.. _extremely fast ingestion speeds: https://cratedb.com/blog/how-we-scaled-ingestion-to-one-million-rows-per-second
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docs/performance/inserts/testing.rst

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -47,7 +47,7 @@ testing purposes, called something like ``my_table_test``.
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Generating fake data
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--------------------
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IF you don't have data already, you can generate fake data. But do note that
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If you don't have data already, you can generate fake data. But do note that
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any differences between fake data and real data may produce significant
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performance differences.
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