Type of columns

opt_text value converts value to a Data.t TEXT value, converting None to SQLite NULL.

opt_int value converts value to a Data.t INT value, converting None to SQLite NULL.

opt_nativeint value converts value to a Data.t INT value, converting None to SQLite NULL.

opt_int32 value converts value to a Data.t INT value, converting None to SQLite NULL.

opt_int64 value converts value to a Data.t INT value, converting None to SQLite NULL.

opt_float value converts value to a Data.t FLOAT value, converting None to SQLite NULL.

opt_bool value converts value to a Data.t INT value, converting None to SQLite NULL.

to_string_exn data converts TEXT and BLOB data to a string.

• raises DataTypeError

  if data is invalid.

to_int_exn data converts INT data to an int.

• raises DataTypeError

  if data is invalid.

• raises Failure

  if the integer conversion over- or underflows.

to_nativeint_exn data converts INT data to a nativeint.

• raises DataTypeError

  if data is invalid.

• raises Failure

  if the integer conversion over- or underflows.

to_int32_exn data converts INT data to an int32.

• raises DataTypeError

  if data is invalid.

• raises Failure

  if the integer conversion over- or underflows.

to_int64_exn data converts INT data to an int64.

• raises DataTypeError

  if data is invalid.

to_float_exn data converts FLOAT data to a float.

• raises DataTypeError

  if data is invalid.

to_bool_exn data converts INT data to a bool.

• raises DataTypeError

  if data is invalid.

to_string data converts data to Some string or None if it is not a valid conversion. This method also converts data of type BLOB to a string.

to_int data converts data to Some int or None if it is not a valid conversion.

• raises Failure

  if the integer conversion over- or underflows.

to_nativeint data converts data to Some nativeint or None if it is not a valid conversion.

• raises Failure

  if the integer conversion over- or underflows.

to_int32 data converts data to Some int32 or None if it is not a valid conversion.

• raises Failure

  if the integer conversion over- or underflows.

to_int64 data converts data to Some int64 or None if it is not a valid conversion.

to_float data converts data to Some float or None if it is not a valid conversion.

to_bool data converts data to Some bool or None if it is not a valid conversion.

to_string_coerce data coerces data to a string, using coercion on ints, NULLs, floats, and other data types.

to_string_debug data converts data to a string including the data constructor. The contents of blobs will not be printed, only its length. Useful for debugging.