com.snowplowanalytics.iglu.schemaddl.redshift.generators

MigrationGenerator

object MigrationGenerator

Module containing all logic to generate DDL files with information required to migration from one version of Schema to another

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  7. def buildAlterTable(tableName: String, varcharSize: Int)(pair: (String, Map[String, String])): AlterTable

    Generate single ALTER TABLE statement for some new property

    Generate single ALTER TABLE statement for some new property

    tableName

    name of migrating table

    varcharSize

    default size for VARCHAR

    pair

    pair of property name and its Schema properties like length, maximum, etc

    returns

    DDL statement altering single column in table

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  12. def generateMigration(migration: Migration, varcharSize: Int = 4096, tableSchema: Option[String] = Some("atomic")): DdlFile

    Generate full ready to be rendered DDL file containing all migration statements and additional data like previous version of table

    Generate full ready to be rendered DDL file containing all migration statements and additional data like previous version of table

    migration

    common JSON Schema migration object with path (from-to) and diff

    varcharSize

    size VARCHARs by default

    tableSchema

    DB schema for table (atomic by default)

    returns

    DDL file containing list of statements ready to be printed

  13. final def getClass(): Class[_]

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  14. def getHeader(tableName: String, oldSchemaUri: String): CommentBlock

    Generate comment block for for migration file with information about previous version of table

    Generate comment block for for migration file with information about previous version of table

    tableName

    name of migrating table

    oldSchemaUri

    Schema URI extracted from internal database store

    returns

    DDL statement with header

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