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Component documentation Restrictions for SQL Statements Locate the document in its SAP Library structure

Maximum length of an SQL statement

= 16 KB (default setting 64 KB), defined by a support database parameter

Identifier length

32 characters

Precision of numeric values

38 digits

Number of tables

Unlimited

Number of columns per table (with KEY)

1024

Number of columns per table (without KEY)

1023

Number of primary key columns per table

512

Number of columns in an index

16

Number of foreign key columns per table

16

Number of columns in an ORDER or GROUP clause

128

Number of columns in a SELECT statement

1023

Number of columns in an INSERT statement

1024

Number of columns in a result table

1023

Number of join tables in a SELECT statement

64

Number of triggers per base table

3

Number of indexes per table

255

Number of referential CONSTRAINT definitions (foreign key dependencies) per table

Unlimited

Number of references per table

Unlimited

Number of rows per table

Limited by database size

Internal length of a table row

8088 bytes

Sum of internal lengths of all key columns

1024 bytes

Sum of internal lengths of all foreign key columns

1024 bytes

Sum of internal lengths of all columns belonging to an index

1024 bytes

Internal length of a LONG column

2 GB

Length of the columns in an ORDER or GROUP clause

1020 bytes

Nested trigger levels

Unlimited

Nested subqueries

127

Number of join conditions in a WHERE clause of a SELECT statement

128

Number of correlated columns in an SQL statement

64

Number of correlated tables in an SQL statement

16

Number of parameters in an SQL statement

2000

 

 

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