Gbase8s database into standard and into raw clauses

You can use it. INTO STANDARD and INTO RAW Clause to create a new storage SELECT Statement's result set .

This syntax provides a single mechanism for specifying queries , To receive qualified records , And insert those query results into permanent database tables .

When using SELECT INTO To create a new permanent table , You can specify its type as STANDARD or RAW. default

The type is STANDARD. You can optionally specify the storage location of the new table 、extent Size and lock mode options .

The column name of the new persistent table is in Projection The names specified in the selection list of the clause . If the asterisk （

*） As

Projection A selection list of clauses appears , Then the asterisk extends to SELECT Of the statement FROM The corresponding table or view in the clause

All column names of . No shadow column is extended by the asterisk specification .

The following example creates a new named ptabl Of raw Table to store the results of the join query ：

SELECT t1col1, t1col2, t2col1

FROM tab1, tab2

WHERE t1col1 < 100 and t2col1 > 5

INTO RAW ptab1;

In the example above , new ptabl Tables may contain columns t1col1、t1col2 and t2col1.

All expressions except simple list expressions must have a definition in Projection Display label in clause . This display

The label is used as the name of the column in the new table . If it's simple （ Or ordinary ） The list expression does not display a label , Then the table uses column names

call . If there are duplicate display labels or column names in the selection list , Returns an error .

The next example fails with an error -249, Because it is not for col1+5 Expression declaration display label ：

SELECT col1+5, col2

FROM tab1

INTO ptab1;

The following revised query avoids the -249 error ：

SELECT col1+5 pcol1, col2

FROM tab1

INTO ptab1;

The example of the above modification creates the standard ptabl The table comes in its columns pcol1 and col2 Store query results in .

Limitations on the result table

With the most DDL The sentence is the same , An attempt to create a new result table in another database with a fully qualified table name failed

And return the syntax error .

To create a result table with the same name as an existing table in the same database , Similar errors will occur .

SELECT INTO . . . TABLE Statement cannot be used as part of a subquery .

However , You can use not SELECT Clause projection Columns that are part of the list are treated as ORDER BY Row in clause

Ordinal key .

To get a query result table that can be similarly created and populated by inserting qualified rows CREATE TABLE language

A description of sentence grammar , see also AS SELECT Clause .