1053 lines
34 KiB
Python
1053 lines
34 KiB
Python
# sql/crud.py
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# Copyright (C) 2005-2021 the SQLAlchemy authors and contributors
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# <see AUTHORS file>
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#
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# This module is part of SQLAlchemy and is released under
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# the MIT License: http://www.opensource.org/licenses/mit-license.php
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"""Functions used by compiler.py to determine the parameters rendered
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within INSERT and UPDATE statements.
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"""
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import functools
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import operator
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from . import coercions
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from . import dml
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from . import elements
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from . import roles
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from .. import exc
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from .. import util
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REQUIRED = util.symbol(
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"REQUIRED",
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"""
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Placeholder for the value within a :class:`.BindParameter`
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which is required to be present when the statement is passed
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to :meth:`_engine.Connection.execute`.
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This symbol is typically used when a :func:`_expression.insert`
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or :func:`_expression.update` statement is compiled without parameter
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values present.
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""",
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)
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def _get_crud_params(compiler, stmt, compile_state, **kw):
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"""create a set of tuples representing column/string pairs for use
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in an INSERT or UPDATE statement.
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Also generates the Compiled object's postfetch, prefetch, and
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returning column collections, used for default handling and ultimately
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populating the CursorResult's prefetch_cols() and postfetch_cols()
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collections.
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"""
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compiler.postfetch = []
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compiler.insert_prefetch = []
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compiler.update_prefetch = []
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compiler.returning = []
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# getters - these are normally just column.key,
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# but in the case of mysql multi-table update, the rules for
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# .key must conditionally take tablename into account
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(
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_column_as_key,
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_getattr_col_key,
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_col_bind_name,
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) = getters = _key_getters_for_crud_column(compiler, stmt, compile_state)
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compiler._key_getters_for_crud_column = getters
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# no parameters in the statement, no parameters in the
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# compiled params - return binds for all columns
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if compiler.column_keys is None and compile_state._no_parameters:
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return [
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(
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c,
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compiler.preparer.format_column(c),
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_create_bind_param(compiler, c, None, required=True),
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)
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for c in stmt.table.columns
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]
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if compile_state._has_multi_parameters:
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spd = compile_state._multi_parameters[0]
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stmt_parameter_tuples = list(spd.items())
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elif compile_state._ordered_values:
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spd = compile_state._dict_parameters
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stmt_parameter_tuples = compile_state._ordered_values
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elif compile_state._dict_parameters:
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spd = compile_state._dict_parameters
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stmt_parameter_tuples = list(spd.items())
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else:
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stmt_parameter_tuples = spd = None
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# if we have statement parameters - set defaults in the
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# compiled params
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if compiler.column_keys is None:
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parameters = {}
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elif stmt_parameter_tuples:
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parameters = dict(
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(_column_as_key(key), REQUIRED)
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for key in compiler.column_keys
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if key not in spd
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)
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else:
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parameters = dict(
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(_column_as_key(key), REQUIRED) for key in compiler.column_keys
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)
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# create a list of column assignment clauses as tuples
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values = []
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if stmt_parameter_tuples is not None:
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_get_stmt_parameter_tuples_params(
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compiler,
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compile_state,
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parameters,
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stmt_parameter_tuples,
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_column_as_key,
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values,
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kw,
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)
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check_columns = {}
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# special logic that only occurs for multi-table UPDATE
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# statements
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if compile_state.isupdate and compile_state.is_multitable:
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_get_multitable_params(
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compiler,
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stmt,
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compile_state,
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stmt_parameter_tuples,
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check_columns,
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_col_bind_name,
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_getattr_col_key,
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values,
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kw,
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)
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if compile_state.isinsert and stmt._select_names:
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_scan_insert_from_select_cols(
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compiler,
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stmt,
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compile_state,
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parameters,
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_getattr_col_key,
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_column_as_key,
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_col_bind_name,
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check_columns,
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values,
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kw,
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)
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else:
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_scan_cols(
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compiler,
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stmt,
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compile_state,
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parameters,
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_getattr_col_key,
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_column_as_key,
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_col_bind_name,
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check_columns,
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values,
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kw,
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)
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if parameters and stmt_parameter_tuples:
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check = (
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set(parameters)
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.intersection(_column_as_key(k) for k, v in stmt_parameter_tuples)
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.difference(check_columns)
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)
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if check:
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raise exc.CompileError(
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"Unconsumed column names: %s"
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% (", ".join("%s" % (c,) for c in check))
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)
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if compile_state._has_multi_parameters:
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values = _extend_values_for_multiparams(
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compiler, stmt, compile_state, values, kw
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)
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elif (
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not values
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and compiler.for_executemany
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and compiler.dialect.supports_default_metavalue
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):
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# convert an "INSERT DEFAULT VALUES"
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# into INSERT (firstcol) VALUES (DEFAULT) which can be turned
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# into an in-place multi values. This supports
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# insert_executemany_returning mode :)
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values = [
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(
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stmt.table.columns[0],
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compiler.preparer.format_column(stmt.table.columns[0]),
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"DEFAULT",
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)
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]
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return values
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def _create_bind_param(
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compiler, col, value, process=True, required=False, name=None, **kw
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):
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if name is None:
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name = col.key
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bindparam = elements.BindParameter(
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name, value, type_=col.type, required=required
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)
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bindparam._is_crud = True
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if process:
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bindparam = bindparam._compiler_dispatch(compiler, **kw)
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return bindparam
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def _handle_values_anonymous_param(compiler, col, value, name, **kw):
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# the insert() and update() constructs as of 1.4 will now produce anonymous
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# bindparam() objects in the values() collections up front when given plain
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# literal values. This is so that cache key behaviors, which need to
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# produce bound parameters in deterministic order without invoking any
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# compilation here, can be applied to these constructs when they include
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# values() (but not yet multi-values, which are not included in caching
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# right now).
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#
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# in order to produce the desired "crud" style name for these parameters,
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# which will also be targetable in engine/default.py through the usual
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# conventions, apply our desired name to these unique parameters by
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# populating the compiler truncated names cache with the desired name,
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# rather than having
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# compiler.visit_bindparam()->compiler._truncated_identifier make up a
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# name. Saves on call counts also.
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if value.unique and isinstance(value.key, elements._truncated_label):
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compiler.truncated_names[("bindparam", value.key)] = name
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if value.type._isnull:
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# either unique parameter, or other bound parameters that were
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# passed in directly
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# set type to that of the column unconditionally
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value = value._with_binary_element_type(col.type)
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return value._compiler_dispatch(compiler, **kw)
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def _key_getters_for_crud_column(compiler, stmt, compile_state):
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if compile_state.isupdate and compile_state._extra_froms:
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# when extra tables are present, refer to the columns
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# in those extra tables as table-qualified, including in
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# dictionaries and when rendering bind param names.
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# the "main" table of the statement remains unqualified,
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# allowing the most compatibility with a non-multi-table
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# statement.
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_et = set(compile_state._extra_froms)
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c_key_role = functools.partial(
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coercions.expect_as_key, roles.DMLColumnRole
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)
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def _column_as_key(key):
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str_key = c_key_role(key)
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if hasattr(key, "table") and key.table in _et:
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return (key.table.name, str_key)
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else:
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return str_key
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def _getattr_col_key(col):
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if col.table in _et:
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return (col.table.name, col.key)
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else:
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return col.key
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def _col_bind_name(col):
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if col.table in _et:
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return "%s_%s" % (col.table.name, col.key)
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else:
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return col.key
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else:
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_column_as_key = functools.partial(
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coercions.expect_as_key, roles.DMLColumnRole
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)
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_getattr_col_key = _col_bind_name = operator.attrgetter("key")
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return _column_as_key, _getattr_col_key, _col_bind_name
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def _scan_insert_from_select_cols(
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compiler,
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stmt,
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compile_state,
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parameters,
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_getattr_col_key,
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_column_as_key,
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_col_bind_name,
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check_columns,
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values,
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kw,
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):
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(
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need_pks,
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implicit_returning,
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implicit_return_defaults,
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postfetch_lastrowid,
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) = _get_returning_modifiers(compiler, stmt, compile_state)
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cols = [stmt.table.c[_column_as_key(name)] for name in stmt._select_names]
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compiler._insert_from_select = stmt.select
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add_select_cols = []
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if stmt.include_insert_from_select_defaults:
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col_set = set(cols)
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for col in stmt.table.columns:
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if col not in col_set and col.default:
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cols.append(col)
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for c in cols:
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col_key = _getattr_col_key(c)
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if col_key in parameters and col_key not in check_columns:
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parameters.pop(col_key)
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values.append((c, compiler.preparer.format_column(c), None))
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else:
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_append_param_insert_select_hasdefault(
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compiler, stmt, c, add_select_cols, kw
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)
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if add_select_cols:
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values.extend(add_select_cols)
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compiler._insert_from_select = compiler._insert_from_select._generate()
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compiler._insert_from_select._raw_columns = tuple(
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compiler._insert_from_select._raw_columns
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) + tuple(expr for col, col_expr, expr in add_select_cols)
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def _scan_cols(
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compiler,
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stmt,
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compile_state,
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parameters,
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_getattr_col_key,
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_column_as_key,
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_col_bind_name,
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check_columns,
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values,
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kw,
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):
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(
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need_pks,
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implicit_returning,
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implicit_return_defaults,
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postfetch_lastrowid,
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) = _get_returning_modifiers(compiler, stmt, compile_state)
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if compile_state._parameter_ordering:
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parameter_ordering = [
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_column_as_key(key) for key in compile_state._parameter_ordering
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]
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ordered_keys = set(parameter_ordering)
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cols = [
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stmt.table.c[key]
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for key in parameter_ordering
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if isinstance(key, util.string_types) and key in stmt.table.c
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] + [c for c in stmt.table.c if c.key not in ordered_keys]
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else:
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cols = stmt.table.columns
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for c in cols:
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# scan through every column in the target table
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col_key = _getattr_col_key(c)
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if col_key in parameters and col_key not in check_columns:
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# parameter is present for the column. use that.
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_append_param_parameter(
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compiler,
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stmt,
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compile_state,
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c,
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col_key,
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parameters,
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_col_bind_name,
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implicit_returning,
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implicit_return_defaults,
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values,
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kw,
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)
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elif compile_state.isinsert:
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# no parameter is present and it's an insert.
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if c.primary_key and need_pks:
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# it's a primary key column, it will need to be generated by a
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# default generator of some kind, and the statement expects
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# inserted_primary_key to be available.
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if implicit_returning:
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# we can use RETURNING, find out how to invoke this
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# column and get the value where RETURNING is an option.
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# we can inline server-side functions in this case.
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_append_param_insert_pk_returning(
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compiler, stmt, c, values, kw
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)
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else:
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# otherwise, find out how to invoke this column
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# and get its value where RETURNING is not an option.
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# if we have to invoke a server-side function, we need
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# to pre-execute it. or if this is a straight
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# autoincrement column and the dialect supports it
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# we can use cursor.lastrowid.
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_append_param_insert_pk_no_returning(
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compiler, stmt, c, values, kw
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)
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elif c.default is not None:
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# column has a default, but it's not a pk column, or it is but
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# we don't need to get the pk back.
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_append_param_insert_hasdefault(
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compiler, stmt, c, implicit_return_defaults, values, kw
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)
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elif c.server_default is not None:
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# column has a DDL-level default, and is either not a pk
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# column or we don't need the pk.
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if implicit_return_defaults and c in implicit_return_defaults:
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compiler.returning.append(c)
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elif not c.primary_key:
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compiler.postfetch.append(c)
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elif implicit_return_defaults and c in implicit_return_defaults:
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compiler.returning.append(c)
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elif (
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c.primary_key
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and c is not stmt.table._autoincrement_column
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and not c.nullable
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):
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_warn_pk_with_no_anticipated_value(c)
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elif compile_state.isupdate:
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# no parameter is present and it's an insert.
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_append_param_update(
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compiler,
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compile_state,
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stmt,
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c,
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implicit_return_defaults,
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values,
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kw,
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)
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|
|
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def _append_param_parameter(
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compiler,
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stmt,
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compile_state,
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c,
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col_key,
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parameters,
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_col_bind_name,
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implicit_returning,
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implicit_return_defaults,
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values,
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kw,
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):
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value = parameters.pop(col_key)
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col_value = compiler.preparer.format_column(
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c, use_table=compile_state.include_table_with_column_exprs
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)
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if coercions._is_literal(value):
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value = _create_bind_param(
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compiler,
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c,
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value,
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required=value is REQUIRED,
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name=_col_bind_name(c)
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if not compile_state._has_multi_parameters
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else "%s_m0" % _col_bind_name(c),
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**kw
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)
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elif value._is_bind_parameter:
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value = _handle_values_anonymous_param(
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compiler,
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c,
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value,
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name=_col_bind_name(c)
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if not compile_state._has_multi_parameters
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else "%s_m0" % _col_bind_name(c),
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**kw
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)
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else:
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# value is a SQL expression
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value = compiler.process(value.self_group(), **kw)
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|
|
if compile_state.isupdate:
|
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if implicit_return_defaults and c in implicit_return_defaults:
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compiler.returning.append(c)
|
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else:
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compiler.postfetch.append(c)
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else:
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if c.primary_key:
|
|
|
|
if implicit_returning:
|
|
compiler.returning.append(c)
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elif compiler.dialect.postfetch_lastrowid:
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|
compiler.postfetch_lastrowid = True
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|
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|
elif implicit_return_defaults and c in implicit_return_defaults:
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compiler.returning.append(c)
|
|
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else:
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|
# postfetch specifically means, "we can SELECT the row we just
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# inserted by primary key to get back the server generated
|
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# defaults". so by definition this can't be used to get the
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# primary key value back, because we need to have it ahead of
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# time.
|
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|
|
compiler.postfetch.append(c)
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|
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values.append((c, col_value, value))
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|
|
|
|
def _append_param_insert_pk_returning(compiler, stmt, c, values, kw):
|
|
"""Create a primary key expression in the INSERT statement where
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we want to populate result.inserted_primary_key and RETURNING
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is available.
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"""
|
|
if c.default is not None:
|
|
if c.default.is_sequence:
|
|
if compiler.dialect.supports_sequences and (
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not c.default.optional
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|
or not compiler.dialect.sequences_optional
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|
):
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|
values.append(
|
|
(
|
|
c,
|
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compiler.preparer.format_column(c),
|
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compiler.process(c.default, **kw),
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)
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)
|
|
compiler.returning.append(c)
|
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elif c.default.is_clause_element:
|
|
values.append(
|
|
(
|
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c,
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compiler.preparer.format_column(c),
|
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compiler.process(c.default.arg.self_group(), **kw),
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)
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)
|
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compiler.returning.append(c)
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else:
|
|
# client side default. OK we can't use RETURNING, need to
|
|
# do a "prefetch", which in fact fetches the default value
|
|
# on the Python side
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
_create_insert_prefetch_bind_param(compiler, c, **kw),
|
|
)
|
|
)
|
|
elif c is stmt.table._autoincrement_column or c.server_default is not None:
|
|
compiler.returning.append(c)
|
|
elif not c.nullable:
|
|
# no .default, no .server_default, not autoincrement, we have
|
|
# no indication this primary key column will have any value
|
|
_warn_pk_with_no_anticipated_value(c)
|
|
|
|
|
|
def _append_param_insert_pk_no_returning(compiler, stmt, c, values, kw):
|
|
"""Create a primary key expression in the INSERT statement where
|
|
we want to populate result.inserted_primary_key and we cannot use
|
|
RETURNING.
|
|
|
|
Depending on the kind of default here we may create a bound parameter
|
|
in the INSERT statement and pre-execute a default generation function,
|
|
or we may use cursor.lastrowid if supported by the dialect.
|
|
|
|
|
|
"""
|
|
|
|
if (
|
|
# column has a Python-side default
|
|
c.default is not None
|
|
and (
|
|
# and it either is not a sequence, or it is and we support
|
|
# sequences and want to invoke it
|
|
not c.default.is_sequence
|
|
or (
|
|
compiler.dialect.supports_sequences
|
|
and (
|
|
not c.default.optional
|
|
or not compiler.dialect.sequences_optional
|
|
)
|
|
)
|
|
)
|
|
) or (
|
|
# column is the "autoincrement column"
|
|
c is stmt.table._autoincrement_column
|
|
and (
|
|
# dialect can't use cursor.lastrowid
|
|
not compiler.dialect.postfetch_lastrowid
|
|
and (
|
|
# column has a Sequence and we support those
|
|
(
|
|
c.default is not None
|
|
and c.default.is_sequence
|
|
and compiler.dialect.supports_sequences
|
|
)
|
|
or
|
|
# column has no default on it, but dialect can run the
|
|
# "autoincrement" mechanism explicitly, e.g. PostgreSQL
|
|
# SERIAL we know the sequence name
|
|
(
|
|
c.default is None
|
|
and compiler.dialect.preexecute_autoincrement_sequences
|
|
)
|
|
)
|
|
)
|
|
):
|
|
# do a pre-execute of the default
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
_create_insert_prefetch_bind_param(compiler, c, **kw),
|
|
)
|
|
)
|
|
elif (
|
|
c.default is None
|
|
and c.server_default is None
|
|
and not c.nullable
|
|
and c is not stmt.table._autoincrement_column
|
|
):
|
|
# no .default, no .server_default, not autoincrement, we have
|
|
# no indication this primary key column will have any value
|
|
_warn_pk_with_no_anticipated_value(c)
|
|
elif compiler.dialect.postfetch_lastrowid:
|
|
# finally, where it seems like there will be a generated primary key
|
|
# value and we haven't set up any other way to fetch it, and the
|
|
# dialect supports cursor.lastrowid, switch on the lastrowid flag so
|
|
# that the DefaultExecutionContext calls upon cursor.lastrowid
|
|
compiler.postfetch_lastrowid = True
|
|
|
|
|
|
def _append_param_insert_hasdefault(
|
|
compiler, stmt, c, implicit_return_defaults, values, kw
|
|
):
|
|
if c.default.is_sequence:
|
|
if compiler.dialect.supports_sequences and (
|
|
not c.default.optional or not compiler.dialect.sequences_optional
|
|
):
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
compiler.process(c.default, **kw),
|
|
)
|
|
)
|
|
if implicit_return_defaults and c in implicit_return_defaults:
|
|
compiler.returning.append(c)
|
|
elif not c.primary_key:
|
|
compiler.postfetch.append(c)
|
|
elif c.default.is_clause_element:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
compiler.process(c.default.arg.self_group(), **kw),
|
|
)
|
|
)
|
|
|
|
if implicit_return_defaults and c in implicit_return_defaults:
|
|
compiler.returning.append(c)
|
|
elif not c.primary_key:
|
|
# don't add primary key column to postfetch
|
|
compiler.postfetch.append(c)
|
|
else:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
_create_insert_prefetch_bind_param(compiler, c, **kw),
|
|
)
|
|
)
|
|
|
|
|
|
def _append_param_insert_select_hasdefault(compiler, stmt, c, values, kw):
|
|
|
|
if c.default.is_sequence:
|
|
if compiler.dialect.supports_sequences and (
|
|
not c.default.optional or not compiler.dialect.sequences_optional
|
|
):
|
|
values.append(
|
|
(c, compiler.preparer.format_column(c), c.default.next_value())
|
|
)
|
|
elif c.default.is_clause_element:
|
|
values.append(
|
|
(c, compiler.preparer.format_column(c), c.default.arg.self_group())
|
|
)
|
|
else:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(c),
|
|
_create_insert_prefetch_bind_param(
|
|
compiler, c, process=False, **kw
|
|
),
|
|
)
|
|
)
|
|
|
|
|
|
def _append_param_update(
|
|
compiler, compile_state, stmt, c, implicit_return_defaults, values, kw
|
|
):
|
|
|
|
include_table = compile_state.include_table_with_column_exprs
|
|
if c.onupdate is not None and not c.onupdate.is_sequence:
|
|
if c.onupdate.is_clause_element:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(
|
|
c,
|
|
use_table=include_table,
|
|
),
|
|
compiler.process(c.onupdate.arg.self_group(), **kw),
|
|
)
|
|
)
|
|
if implicit_return_defaults and c in implicit_return_defaults:
|
|
compiler.returning.append(c)
|
|
else:
|
|
compiler.postfetch.append(c)
|
|
else:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.preparer.format_column(
|
|
c,
|
|
use_table=include_table,
|
|
),
|
|
_create_update_prefetch_bind_param(compiler, c, **kw),
|
|
)
|
|
)
|
|
elif c.server_onupdate is not None:
|
|
if implicit_return_defaults and c in implicit_return_defaults:
|
|
compiler.returning.append(c)
|
|
else:
|
|
compiler.postfetch.append(c)
|
|
elif (
|
|
implicit_return_defaults
|
|
and stmt._return_defaults is not True
|
|
and c in implicit_return_defaults
|
|
):
|
|
compiler.returning.append(c)
|
|
|
|
|
|
def _create_insert_prefetch_bind_param(
|
|
compiler, c, process=True, name=None, **kw
|
|
):
|
|
|
|
param = _create_bind_param(
|
|
compiler, c, None, process=process, name=name, **kw
|
|
)
|
|
compiler.insert_prefetch.append(c)
|
|
return param
|
|
|
|
|
|
def _create_update_prefetch_bind_param(
|
|
compiler, c, process=True, name=None, **kw
|
|
):
|
|
param = _create_bind_param(
|
|
compiler, c, None, process=process, name=name, **kw
|
|
)
|
|
compiler.update_prefetch.append(c)
|
|
return param
|
|
|
|
|
|
class _multiparam_column(elements.ColumnElement):
|
|
_is_multiparam_column = True
|
|
|
|
def __init__(self, original, index):
|
|
self.index = index
|
|
self.key = "%s_m%d" % (original.key, index + 1)
|
|
self.original = original
|
|
self.default = original.default
|
|
self.type = original.type
|
|
|
|
def compare(self, other, **kw):
|
|
raise NotImplementedError()
|
|
|
|
def _copy_internals(self, other, **kw):
|
|
raise NotImplementedError()
|
|
|
|
def __eq__(self, other):
|
|
return (
|
|
isinstance(other, _multiparam_column)
|
|
and other.key == self.key
|
|
and other.original == self.original
|
|
)
|
|
|
|
|
|
def _process_multiparam_default_bind(compiler, stmt, c, index, kw):
|
|
if not c.default:
|
|
raise exc.CompileError(
|
|
"INSERT value for column %s is explicitly rendered as a bound"
|
|
"parameter in the VALUES clause; "
|
|
"a Python-side value or SQL expression is required" % c
|
|
)
|
|
elif c.default.is_clause_element:
|
|
return compiler.process(c.default.arg.self_group(), **kw)
|
|
elif c.default.is_sequence:
|
|
# these conditions would have been established
|
|
# by append_param_insert_(?:hasdefault|pk_returning|pk_no_returning)
|
|
# in order for us to be here, so these don't need to be
|
|
# checked
|
|
# assert compiler.dialect.supports_sequences and (
|
|
# not c.default.optional
|
|
# or not compiler.dialect.sequences_optional
|
|
# )
|
|
return compiler.process(c.default, **kw)
|
|
else:
|
|
col = _multiparam_column(c, index)
|
|
if isinstance(stmt, dml.Insert):
|
|
return _create_insert_prefetch_bind_param(compiler, col, **kw)
|
|
else:
|
|
return _create_update_prefetch_bind_param(compiler, col, **kw)
|
|
|
|
|
|
def _get_multitable_params(
|
|
compiler,
|
|
stmt,
|
|
compile_state,
|
|
stmt_parameter_tuples,
|
|
check_columns,
|
|
_col_bind_name,
|
|
_getattr_col_key,
|
|
values,
|
|
kw,
|
|
):
|
|
normalized_params = dict(
|
|
(coercions.expect(roles.DMLColumnRole, c), param)
|
|
for c, param in stmt_parameter_tuples
|
|
)
|
|
|
|
include_table = compile_state.include_table_with_column_exprs
|
|
|
|
affected_tables = set()
|
|
for t in compile_state._extra_froms:
|
|
for c in t.c:
|
|
if c in normalized_params:
|
|
affected_tables.add(t)
|
|
check_columns[_getattr_col_key(c)] = c
|
|
value = normalized_params[c]
|
|
|
|
col_value = compiler.process(c, include_table=include_table)
|
|
if coercions._is_literal(value):
|
|
value = _create_bind_param(
|
|
compiler,
|
|
c,
|
|
value,
|
|
required=value is REQUIRED,
|
|
name=_col_bind_name(c),
|
|
**kw # TODO: no test coverage for literal binds here
|
|
)
|
|
elif value._is_bind_parameter:
|
|
value = _handle_values_anonymous_param(
|
|
compiler, c, value, name=_col_bind_name(c), **kw
|
|
)
|
|
else:
|
|
compiler.postfetch.append(c)
|
|
value = compiler.process(value.self_group(), **kw)
|
|
values.append((c, col_value, value))
|
|
# determine tables which are actually to be updated - process onupdate
|
|
# and server_onupdate for these
|
|
for t in affected_tables:
|
|
for c in t.c:
|
|
if c in normalized_params:
|
|
continue
|
|
elif c.onupdate is not None and not c.onupdate.is_sequence:
|
|
if c.onupdate.is_clause_element:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.process(c, include_table=include_table),
|
|
compiler.process(
|
|
c.onupdate.arg.self_group(), **kw
|
|
),
|
|
)
|
|
)
|
|
compiler.postfetch.append(c)
|
|
else:
|
|
values.append(
|
|
(
|
|
c,
|
|
compiler.process(c, include_table=include_table),
|
|
_create_update_prefetch_bind_param(
|
|
compiler, c, name=_col_bind_name(c), **kw
|
|
),
|
|
)
|
|
)
|
|
elif c.server_onupdate is not None:
|
|
compiler.postfetch.append(c)
|
|
|
|
|
|
def _extend_values_for_multiparams(compiler, stmt, compile_state, values, kw):
|
|
values_0 = values
|
|
values = [values]
|
|
|
|
for i, row in enumerate(compile_state._multi_parameters[1:]):
|
|
extension = []
|
|
for (col, col_expr, param) in values_0:
|
|
if col in row or col.key in row:
|
|
key = col if col in row else col.key
|
|
|
|
if coercions._is_literal(row[key]):
|
|
new_param = _create_bind_param(
|
|
compiler,
|
|
col,
|
|
row[key],
|
|
name="%s_m%d" % (col.key, i + 1),
|
|
**kw
|
|
)
|
|
else:
|
|
new_param = compiler.process(row[key].self_group(), **kw)
|
|
else:
|
|
new_param = _process_multiparam_default_bind(
|
|
compiler, stmt, col, i, kw
|
|
)
|
|
|
|
extension.append((col, col_expr, new_param))
|
|
|
|
values.append(extension)
|
|
|
|
return values
|
|
|
|
|
|
def _get_stmt_parameter_tuples_params(
|
|
compiler,
|
|
compile_state,
|
|
parameters,
|
|
stmt_parameter_tuples,
|
|
_column_as_key,
|
|
values,
|
|
kw,
|
|
):
|
|
|
|
for k, v in stmt_parameter_tuples:
|
|
colkey = _column_as_key(k)
|
|
if colkey is not None:
|
|
parameters.setdefault(colkey, v)
|
|
else:
|
|
# a non-Column expression on the left side;
|
|
# add it to values() in an "as-is" state,
|
|
# coercing right side to bound param
|
|
|
|
# note one of the main use cases for this is array slice
|
|
# updates on PostgreSQL, as the left side is also an expression.
|
|
|
|
col_expr = compiler.process(
|
|
k, include_table=compile_state.include_table_with_column_exprs
|
|
)
|
|
|
|
if coercions._is_literal(v):
|
|
v = compiler.process(
|
|
elements.BindParameter(None, v, type_=k.type), **kw
|
|
)
|
|
else:
|
|
if v._is_bind_parameter and v.type._isnull:
|
|
# either unique parameter, or other bound parameters that
|
|
# were passed in directly
|
|
# set type to that of the column unconditionally
|
|
v = v._with_binary_element_type(k.type)
|
|
|
|
v = compiler.process(v.self_group(), **kw)
|
|
|
|
values.append((k, col_expr, v))
|
|
|
|
|
|
def _get_returning_modifiers(compiler, stmt, compile_state):
|
|
|
|
need_pks = (
|
|
compile_state.isinsert
|
|
and not stmt._inline
|
|
and (
|
|
not compiler.for_executemany
|
|
or (
|
|
compiler.dialect.insert_executemany_returning
|
|
and stmt._return_defaults
|
|
)
|
|
)
|
|
and not stmt._returning
|
|
and not compile_state._has_multi_parameters
|
|
)
|
|
|
|
implicit_returning = (
|
|
need_pks
|
|
and compiler.dialect.implicit_returning
|
|
and stmt.table.implicit_returning
|
|
)
|
|
|
|
if compile_state.isinsert:
|
|
implicit_return_defaults = implicit_returning and stmt._return_defaults
|
|
elif compile_state.isupdate:
|
|
implicit_return_defaults = (
|
|
compiler.dialect.implicit_returning
|
|
and stmt.table.implicit_returning
|
|
and stmt._return_defaults
|
|
)
|
|
else:
|
|
# this line is unused, currently we are always
|
|
# isinsert or isupdate
|
|
implicit_return_defaults = False # pragma: no cover
|
|
|
|
if implicit_return_defaults:
|
|
if stmt._return_defaults is True:
|
|
implicit_return_defaults = set(stmt.table.c)
|
|
else:
|
|
implicit_return_defaults = set(stmt._return_defaults)
|
|
|
|
postfetch_lastrowid = need_pks and compiler.dialect.postfetch_lastrowid
|
|
|
|
return (
|
|
need_pks,
|
|
implicit_returning,
|
|
implicit_return_defaults,
|
|
postfetch_lastrowid,
|
|
)
|
|
|
|
|
|
def _warn_pk_with_no_anticipated_value(c):
|
|
msg = (
|
|
"Column '%s.%s' is marked as a member of the "
|
|
"primary key for table '%s', "
|
|
"but has no Python-side or server-side default generator indicated, "
|
|
"nor does it indicate 'autoincrement=True' or 'nullable=True', "
|
|
"and no explicit value is passed. "
|
|
"Primary key columns typically may not store NULL."
|
|
% (c.table.fullname, c.name, c.table.fullname)
|
|
)
|
|
if len(c.table.primary_key) > 1:
|
|
msg += (
|
|
" Note that as of SQLAlchemy 1.1, 'autoincrement=True' must be "
|
|
"indicated explicitly for composite (e.g. multicolumn) primary "
|
|
"keys if AUTO_INCREMENT/SERIAL/IDENTITY "
|
|
"behavior is expected for one of the columns in the primary key. "
|
|
"CREATE TABLE statements are impacted by this change as well on "
|
|
"most backends."
|
|
)
|
|
util.warn(msg)
|