Openedge Data Management: SQL Reference - Product ...

Data types
• There is no support for an UPDATE of an LVARBINARY column on a table that contains a
column of data type LVARBINARY. Obtain the functionality of an UPDATE on an LVARBINARY
column by using the DELETE and INSERT statements for the record.
Utility support for LVARBINARY
Use BINARY DUMP/LOAD to dump and load data that contains the LVARBINARY data type. SQLDUMP
and SQLLOAD do not support tables with LVARBINARY column data.
Array data types
The ARRAY data type is a composite data value that consists of zero or more elements of a
specified data type (known as the element type). VARARRAY data type allows the size of an
individual element value to exceed its declared size as long as the total size of the array is
smaller than the array’s SQL width.
The VARARRAY type is most compatible with the ABL array data definitions. For best
compatibility with the ABL, use the VARARRAY type. The ARRAY type is less ABL compatible and
more SQL standard compliant.
This is the syntax for the array data type:
Syntax
data_type ARRAY[int] | VARARRAY[int]
data_type
[int]
The data type of the array. This is also known as the element type.
Supported data types are: BINARY, BIT, CHAR, VARCHAR, DATE, DECIMAL, DOUBLE
PRECISION, FLOAT, INTEGER, NUMERIC, REAL, SMALLINT, TIME, TIMESTAMP,
TIMESTAMP_TZ, TINYINT, and VARBINARY.
An unsigned integer, indicating the array’s maximum element size.
Example In this example, table TBL is created. TBL has two columns: column C1 is an array of up to 3
elements, all of them type int and column C2 is a variable-sized array of up to 4 elements, all
of them type varchar:
CREATE TABLE TBL (C1 int ARRAY[3], C2 varchar(5) VARARRAY[4]);
The size of any element in C2 can be up to 20 characters (5*4) with a total size of 20 characters.
Notes • OpenEdge SQL limits an array’s size. The array’s size must be an integer between 1 and
9999.
• Array columns and element references cannot be indexed because:
– You cannot define a UNIQUE key with columns of type ARRAY.
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