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Operations

pelican.schema.operations.Operation dataclass 

Operation(table_name)

Bases: ABC

table_name instance-attribute 

table_name

compile abstractmethod 

compile(compiler)
Source code in pelican/schema/operations.py 
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@abstractmethod
def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    pass

pelican.schema.operations.AddColumn dataclass 

AddColumn(table_name, column)

Bases: Operation

column instance-attribute 

column

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.add_column(self.table_name, self.column)

pelican.schema.operations.DropColumn dataclass 

DropColumn(table_name, column_name)

Bases: Operation

column_name instance-attribute 

column_name

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.drop_column(self.table_name, self.column_name)

pelican.schema.operations.RenameColumn dataclass 

RenameColumn(table_name, old_name, new_name)

Bases: Operation

old_name instance-attribute 

old_name

new_name instance-attribute 

new_name

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.rename_column(self.table_name, self.old_name, self.new_name)

pelican.schema.operations.AlterColumn dataclass 

AlterColumn(table_name, column_name, new_type=None, nullable=None, default=None, server_default=None)

Bases: Operation

column_name instance-attribute 

column_name

new_type class-attribute instance-attribute 

new_type = None

nullable class-attribute instance-attribute 

nullable = None

default class-attribute instance-attribute 

default = None

server_default class-attribute instance-attribute 

server_default = None

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.alter_column(
        self.table_name,
        self.column_name,
        new_type=self.new_type,
        nullable=self.nullable,
        default=self.default,
        server_default=self.server_default,
    )

pelican.schema.operations.CreateIndex dataclass 

CreateIndex(table_name, index_name, column_names, unique)

Bases: Operation

index_name instance-attribute 

index_name

column_names instance-attribute 

column_names

unique instance-attribute 

unique

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.create_index(
        self.table_name, self.index_name, self.column_names, self.unique
    )

pelican.schema.operations.RemoveIndex dataclass 

RemoveIndex(table_name, index_name)

Bases: Operation

index_name instance-attribute 

index_name

compile 

compile(compiler)
Source code in pelican/schema/operations.py 
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def compile(self, compiler: DialectCompiler) -> Iterable[Executable]:
    return compiler.drop_index(self.table_name, self.index_name)