File size: 2,916 Bytes
2c3c408 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | from typing import Optional
import tiledb
from tiledb.libtiledb import version as libtiledb_version
from .enumeration import Enumeration
from .main import ArraySchemaEvolution as ASE
class ArraySchemaEvolution:
"""This class provides the capability to evolve the ArraySchema of
a TileDB array in place by adding and removing attributes.
"""
def __init__(self, ctx: Optional[tiledb.Ctx] = None):
ctx = ctx or tiledb.default_ctx()
self.ase = ASE(ctx)
def add_attribute(self, attr: tiledb.Attr):
"""Add the given attribute to the schema evolution plan.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.add_attribute(attr)
def drop_attribute(self, attr_name: str):
"""Drop the given attribute (by name) in the schema evolution.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.drop_attribute(attr_name)
def add_enumeration(self, enmr: Enumeration):
"""Add the given enumeration to the schema evolution plan.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.add_enumeration(enmr)
def drop_enumeration(self, enmr_name: str):
"""Drop the given enumeration (by name) in the schema evolution.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.drop_enumeration(enmr_name)
def extend_enumeration(self, enmr: Enumeration):
"""Extend the existing enumeration (by name) in the schema evolution.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.extend_enumeration(enmr)
if libtiledb_version()[0] == 2 and libtiledb_version()[1] >= 25:
from .current_domain import CurrentDomain
def expand_current_domain(self, current_domain: CurrentDomain):
"""Expand the current domain in the schema evolution.
Note: this function does not apply any changes; the changes are
only applied when `ArraySchemaEvolution.array_evolve` is called."""
self.ase.expand_current_domain(current_domain)
def array_evolve(self, uri: str):
"""Apply ArraySchemaEvolution actions to Array at given URI."""
self.ase.array_evolve(uri)
def timestamp(self, timestamp: int):
"""Sets the timestamp of the schema file."""
if not isinstance(timestamp, int):
raise ValueError("'timestamp' argument expects int")
self.ase.set_timestamp_range(timestamp)
|