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ColumnWithDefaultExprUtils

IDENTITY_MIN_WRITER_VERSION

ColumnWithDefaultExprUtils uses 6 as the minimum version of a writer for writing to IDENTITY columns.

IDENTITY_MIN_WRITER_VERSION is used when:

columnHasDefaultExpr

columnHasDefaultExpr(
  protocol: Protocol,
  col: StructField): Boolean

columnHasDefaultExpr is an alias of GeneratedColumn.isGeneratedColumn.

columnHasDefaultExpr is used when:

  • DeltaAnalysis logical resolution rule is requested to resolveQueryColumnsByName

hasIdentityColumn

hasIdentityColumn(
  schema: StructType): Boolean

hasIdentityColumn returns true if the given StructType (Spark SQL) contains an IDENTITY column.

hasIdentityColumn is used when:

isIdentityColumn

isIdentityColumn(
  field: StructField): Boolean

isIdentityColumn uses the Metadata (of the given StructField) to check the existence of delta.identity.start, delta.identity.step and delta.identity.allowExplicitInsert metadata keys.

IDENTITY column

IDENTITY column is a column with delta.identity.start, delta.identity.step and delta.identity.allowExplicitInsert metadata.

isIdentityColumn is used when:

removeDefaultExpressions

removeDefaultExpressions(
  schema: StructType,
  keepGeneratedColumns: Boolean = false): StructType

removeDefaultExpressions...FIXME

removeDefaultExpressions is used when: