GetSpannerTableDDL return Spanner Table DDL as string.

IsColumnPresentInColNames check column is present in colnames.

removeColumn remove given column from schema.

ReviewColumnNameType review update of colum type to given newType.

ReviewTableSchema review Spanner Table Schema.

UpdateColumnType updates type of given column to newType.

UpdateColumnTypeTableSchema updates column type to newtype for a column of a table.

updateTableSchema updates the Spanner schema.