The attribute that defines whether to validate the defined check constraint.ALTER TABLE table ALTER COLUMN column xml_schema_collection ) ]ĪLL - All constraints or triggers in the table are enabled or disabled.Ĭolumn - A maximum of 128 characters. The attribute that defines whether to validate the defined foreign key constraint. The attribute that defines whether to validate the defined primary key constraint. The attribute that defines whether to validate the defined unique constraint. The attribute that defines whether to validate the defined not null constraint. The attribute that defines whether constraints are initially deferred. The attribute that defines whether constraints are deferrable. The attribute that defines whether a unique clause should be applied. The tablespace to use for the defined primary key. The attribute that defines whether the column is a primary key. The attribute that defines whether the column is nullable. The tag contains information about constraints on the column. To help make scripts database-independent, the following generic data types will be converted to the correct database implementation:Īlso, specifying a .* type will be converted to the correct type as well. Default value is false (in an ascending order) Since 3.4 The boolean attribute which allows you to specify that a column should be used in a descending order in the index if it is used in a createIndex command.
Only one of beforeColumn, afterColumn, or position is allowed. The attribute that allows you to control where in the table column order the new column goes if it is used in an addColumn command. Ignored on databases that do not support autoincrement/identity functionality.Ī short description of the column (column comment). The value of each step by auto-increment. Ignored on databases that do not support autoincrement/identity functionality. Ignored on databases that do not support the autoincrement/identity functionality. This attribute will contain the function to call.
The default value that is returned from a function or procedure call. The value is specified in one of the following forms: YYYY-MM-DD, hh:mm:ss, or YYYY-MM-DDThh:mm:ss. The default date and time value for column. Note: If you don't set the first value, the defaultValueXXX is used in the order it appears. Note: The attribute is used only when valueClobFile attribute is specified. "UTF-8") of the CLOB file (specified in valueClobFile) contents. The name of the encoding (specified in javadoc, e.g. The path to a file, whose contents will be written as a CLOB (i.e. Note: Refer to java.io.File javadoc for the details of what to consider relative or absolute path). An example of an absolute path is: /usr/local/somefile.dat on Unix or c:\Directory\somefile.dat on Windows. The path to the changelog file location must be either absolute or relative. The path to a file, whose contents will be written as a BLOB (i.e. The value that is returned from a function or procedure call. The date and time value to set the column to. The actual value string inserted will depend on the database implementation. The value will not be escaped and will not be nested in quote marks. The attribute which is used if the value in name isn't actually a column name but a function. Setting the defaultValue attribute will specify a default value for the column. Note: Setting the value attribute will set all rows existing to the specified value without modifying the column default. The value will be surrounded by quote marks and nested quote marks will be escaped. As a result, not all the attributes of column are valid in each context it is used in. The tag is a tag that is re-used throughout the Liquibase XML when column definitions and column information is needed. See Information about the tag section for more information. Setting the value attribute will set all rows existing to the specified value without modifying the column default. The column constraint and foreign key information.
Step 2: Deploy your changeset by running the update command. Step 1: Add the addColumn Change Type to your changeset with the needed attributes as it is shown in the examples. To create a column for your table, follow these steps: You can typically use the addColumn Change Type when you want to add a new column and deploy it to the table in your database. The addColumn Change Type adds a new column to an existing table.