DBE_SQL
Data Types
- DBE_SQL.DESC_REC
This type is a composite type and is used to store the description of the SQL_DESCRIBE_COLUMNS API.
The prototype of the DBE_SQL.DESC_REC type is as follows:
1 2 3 4 5 6 7 8 9 10 11 12 13
CREATE TYPE DBE_SQL.DESC_REC AS ( col_type int, col_max_len int, col_name VARCHAR2(32), col_name_len int, col_schema_name VARCHAR2(32), col_schema_name_len int, col_precision int, col_scale int, col_charsetid int, col_charsetform int, col_null_ok BOOLEAN );
- DBE_SQL.DESC_TAB
- DBE_SQL.DATE_TABLE
- DBE_SQL.NUMBER_TABLE
- DBE_SQL.VARCHAR2_TABLE
API Description
Table 1 lists APIs supported by the DBE_SQL package.
|
API |
Description |
|---|---|
|
Opens a cursor. |
|
|
Closes an open cursor. |
|
|
Passes a set of SQL statements or anonymous blocks to a cursor. |
|
|
Executes SQL statements or anonymous blocks in a given cursor. |
|
|
Reads a row of cursor data. |
|
|
Dynamically defines a column. |
|
|
Dynamically defines a column of the CHAR type. |
|
|
Dynamically defines a column of the INT type. |
|
|
Dynamically defines a column of the LONG type. |
|
|
Dynamically defines a column of the RAW type. |
|
|
Dynamically defines a column of the TEXT type. |
|
|
Dynamically defines a column of an unknown type. |
|
|
Reads a dynamically defined column value. |
|
|
Reads a dynamically defined column value of the CHAR type. |
|
|
Reads a dynamically defined column value of the INT type. |
|
|
Reads a dynamically defined column value of the LONG type. |
|
|
Reads a dynamically defined column value of the RAW type. |
|
|
Reads a dynamically defined column value of the TEXT type. |
|
|
Reads a dynamically defined column value of an unknown type. |
|
|
Reads a dynamically defined column value of the CHAR type. |
|
|
Reads a dynamically defined column value of the LONG type. |
|
|
Reads a dynamically defined column value of the RAW type. |
|
|
Checks whether a cursor is opened. |
|
|
Returns the cumulative count of obtained rows. |
|
|
Reads data of a cursor after a set of dynamically defined operations are performed on the cursor. |
|
|
Binds a value to a variable in a statement. |
|
|
Binds a group of values to a variable in a statement. |
|
|
Dynamically defines a column of the INT array type. |
|
|
Dynamically defines a column of the TEXT array type. |
|
|
Dynamically defines a column of the RAW array type. |
|
|
Dynamically defines a column of the BYTEA array type. |
|
|
Dynamically defines a column of the CHAR array type. |
|
|
Dynamically defines a column of the array type. |
|
|
Reads a dynamically defined column value of the INT array type. |
|
|
Reads a dynamically defined column value of the TEXT array type. |
|
|
Reads a dynamically defined column value of the RAW array type. |
|
|
Reads a dynamically defined column value of the BYTEA array type. |
|
|
Reads a dynamically defined column value of the CHAR array type. |
|
|
Reads a dynamically defined column value. |
|
|
Describes the column information read by the cursor. |
|
|
Describes the column information read by the cursor. |
|
|
Binds parameters. |
|
|
Dynamically defines a column of the array type. |
|
|
Reads a dynamically defined column value. |
|
|
Reads the return value of an SQL statement. |
|
|
Reads the return value (of the char type) of an SQL statement. |
|
|
Reads the return value (of the raw type) of an SQL statement. |
|
|
Reads the return value (of the text type) of an SQL statement. |
|
|
Reads the return value (of the int type) of an SQL statement. |
|
|
Reads the return value (of the text array type) of an SQL statement. |
|
|
Reads the return value (of the raw array type) of an SQL statement. |
|
|
Reads the return value (of the char array type) of an SQL statement. |
|
|
Reads the return value (of the int array type) of an SQL statement. |
- You are advised to use dbe_sql.set_result_type and dbe_sql.get_result to define columns.
- If the size of the result set is greater than the value of work_mem, the result set will be spilled to a disk temporarily. The value of work_mem must be no greater than 512 MB.
- DBE_SQL.REGISTER_CONTEXT
This function opens a cursor, which is the prerequisite for the subsequent dbe_sql operations. This function does not transfer any parameter. It automatically generates cursor IDs in an ascending order and returns values to integer variables.
Cursors opened by DBE_SQL are session-level variables. Cross-session calling of opened cursors (such as autonomous transactions) is not supported. If a cross-session cursor is called, the behavior is unpredictable.
The prototype of the DBE_SQL.REGISTER_CONTEXT function is as follows:
1 2 3
DBE_SQL.REGISTER_CONTEXT( ) RETURN INTEGER;
- DBE_SQL.SQL_UNREGISTER_CONTEXT
This function closes a cursor, which is the end of each dbe_sql operation. If this function is not called when the stored procedure ends, the memory is still occupied by the cursor. Therefore, remember to close a cursor when you do not need to use it. If an exception occurs, the stored procedure exits but the cursor is not closed. Therefore, you are advised to include this API in the exception handling of the stored procedure.
The prototype of the DBE_SQL.SQL_UNREGISTER_CONTEXT function is as follows:
1 2 3 4
DBE_SQL.SQL_UNREGISTER_CONTEXT( context_id IN INT ) RETURN INTEGER;
Table 2 DBE_SQL.SQL_UNREGISTER_CONTEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be closed
- DBE_SQL.SQL_SET_SQL
Parses SQL statements or anonymous blocks in a given cursor. The statement parameters can be transferred only through the TEXT type. The length cannot exceed 1 GB.
The prototype of the DBE_SQL.SQL_SET_SQL function is as follows:1 2 3 4 5 6
DBE_SQL.SQL_SET_SQL( context_id IN INT, query_string IN TEXT, language_flag IN INT ) RETURN BOOLEAN;
Table 3 DBE_SQL.SQL_SET_SQL parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor whose query statement is to be parsed
query_string
TEXT
IN
No
Query statement to be parsed
language_flag
INT
IN
No
Version language. The value 1 indicates an incompatible version, and the value 2 indicates an ORA-compatible version.
- DBE_SQL.SQL_RUN
This function executes a given cursor. This function receives a cursor ID and executes SQL statements or anonymous blocks in a given cursor.
The prototype of the DBE_SQL.SQL_RUN function is as follows:1 2 3 4
DBE_SQL.SQL_RUN( context_id IN INT, ) RETURN INTEGER;
Table 4 DBE_SQL.SQL_RUN parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor whose query statement is to be parsed
- DBE_SQL.NEXT_ROW
This function returns the number of data rows that meet query conditions. Each time the API is executed, the system obtains a set of new rows until all data is read.
The prototype of the DBE_SQL.NEXT_ROW function is as follows:1 2 3 4
DBE_SQL.NEXT_ROW( context_id IN INT, ) RETURN INTEGER;
Table 5 DBE_SQL.NEXT_ROW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
- DBE_SQL.SET_RESULT_TYPE
This function defines columns returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE function is as follows:1 2 3 4 5 6 7
DBE_SQL.SET_RESULT_TYPE( context_id IN INT, pos IN INT, column_ref IN ANYELEMENT, maxsize IN INT default 1024 ) RETURN INTEGER;
Table 6 DBE_SQL.SET_RESULT_TYPE parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Relative position of the queried columns in the returned result. The value starts from 1.
column_ref
ANYELEMENT
IN
No
Variable of any type. You can select an appropriate API to dynamically define columns based on variable types.
maxsize
INT
IN
Yes
Length of the defined column return type.
- DBE_SQL.SET_RESULT_TYPE_CHAR
This function defines columns of the CHAR type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_CHAR function is as follows:1 2 3 4 5 6 7
DBE_SQL.SET_RESULT_TYPE_CHAR( context_id IN INT, pos IN INT, column_ref IN TEXT, column_size IN INT ) RETURN INTEGER;
Table 7 DBE_SQL.SET_RESULT_TYPE_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
TEXT
IN
No
Parameter to be defined.
column_size
INT
IN
No
Length of a dynamically defined column.
- DBE_SQL.SET_RESULT_TYPE_INT
This function defines columns of the INT type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_INT function is as follows:1 2 3 4 5
DBE_SQL.SET_RESULT_TYPE_INT( context_id IN INT, pos IN INT ) RETURN INTEGER;
Table 8 DBE_SQL.SET_RESULT_TYPE_INT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.SET_RESULT_TYPE_LONG
This function defines columns of a long column type (not LONG) returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type. The maximum size of a long column is 1 GB.
The prototype of the DBE_SQL.SET_RESULT_TYPE_LONG function is as follows:1 2 3 4 5
DBE_SQL.SET_RESULT_TYPE_LONG( context_id IN INT, pos IN INT ) RETURN INTEGER;
Table 9 DBE_SQL.SET_RESULT_TYPE_LONG parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.SET_RESULT_TYPE_RAW
This function defines columns of the RAW type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_RAW function is as follows:1 2 3 4 5 6 7
DBE_SQL.SET_RESULT_TYPE_RAW( context_id IN INT, pos IN INT, column_ref IN BYTEA, column_size IN INT ) RETURN INTEGER;
Table 10 DBE_SQL.SET_RESULT_TYPE_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
BYTEA
IN
No
RAW variable.
column_size
INT
IN
No
Column length.
- DBE_SQL.SET_RESULT_TYPE_TEXT
This function defines columns of the TEXT type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_TEXT function is as follows:1 2 3 4 5 6
DBE_SQL.DEFINE_COLUMN_CHAR( context_id IN INT, pos IN INT, maxsize IN INT ) RETURN INTEGER;
Table 11 DBE_SQL.SET_RESULT_TYPE_TEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
IN
IN
No
ID of the cursor to be executed.
pos
IN
IN
No
Position of a dynamically defined column in the query.
maxsize
IN
IN
No
Maximum length of the defined TEXT type
- DBE_SQL.SET_RESULT_TYPE_UNKNOWN
This function processes columns of unknown data types returned from a given cursor. It is used only for the system to report an error and exist when the type cannot be identified.
The prototype of the DBE_SQL.SET_RESULT_TYPE_UNKNOWN function is as follows:1 2 3 4 5 6
DBE_SQL.SET_RESULT_TYPE_UNKNOWN( context_id IN INT, pos IN INT, col_type IN TEXT ) RETURN INTEGER;
Table 12 DBE_SQL.SET_RESULT_TYPE_UNKNOWN parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
col_type
TEXT
IN
No
Dynamically defined parameter.
- DBE_SQL.GET_RESULT
This stored procedure returns the cursor element value in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULT stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULT( context_id IN INT, pos IN INT, column_value INOUT ANYELEMENT );
Table 13 DBE_SQL.GET_RESULT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Relative position of the queried columns in the returned result. The value starts from 1.
column_value
ANYELEMENT
INOUT
No
Return value of a defined column
- DBE_SQL.GET_RESULT_CHAR
This stored procedure returns the value of the CHAR type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULT_CHAR stored procedure is as follows:1 2 3 4 5 6 7
DBE_SQL.GET_RESULT_CHAR( context_id IN INT, pos IN INT, tr INOUT CHAR, err INOUT NUMERIC DEFAULT 0, actual_length INOUT INT DEFAULT 1024 );
Table 14 DBE_SQL.GET_RESULT_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
tr
CHAR
INOUT
No
Return value.
err
NUMERIC
INOUT
Yes
Error No. It is an output parameter. The input parameter must be a variable. The default value is 0. Currently, the output value is –1 regardless of the input parameter.
actual_length
INT
INOUT
Yes
Length of a return value. The default value is 1024.
- DBE_SQL.GET_RESULT_INT
This function returns the value of the INT type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW. The prototype of the DBE_SQL.GET_RESULT_INT function is as follows:
1 2 3 4 5
DBE_SQL.GET_RESULT_INT( context_id IN INT, pos IN INT ) RETURN INTEGER;
Table 15 DBE_SQL.GET_RESULT_INT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.GET_RESULT_LONG
This stored procedure returns the value of a long column type (not LONG or BIGINT) in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULT_LONG stored procedure is as follows:1 2 3 4 5 6 7 8
DBE_SQL.GET_RESULT_LONG( context_id IN INT, pos IN INT, lgth IN INT, off_set IN INT, vl INOUT TEXT, vl_length INOUT INT );
Table 16 DBE_SQL.GET_RESULT_LONG parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
lgth
INT
IN
No
Length of a return value
off_set
INT
IN
No
Start position of a return value.
vl
TEXT
INOUT
No
Return value.
vl_length
INT
INOUT
No
Length of a return value.
- DBE_SQL.GET_RESULT_RAW
This stored procedure returns the value of the RAW type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULT_RAW stored procedure is as follows:1 2 3 4 5 6 7
DBE_SQL.GET_RESULT_RAW( context_id IN INT, pos IN INT, tr INOUT BYTEA, err INOUT NUMERIC DEFAULT 0, actual_length INOUT INT DEFAULT 1024 );
Table 17 DBE_SQL.GET_RESULT_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
tr
BYTEA
INOUT
No
Returned column value.
err
NUMERIC
INOUT
No
Error number. It is an output parameter. The input parameter must be a variable. The default value is 0. Currently, the output value is –1 regardless of the input parameter.
actual_length
INT
INOUT
No
Length of a return value. The value longer than this length will be truncated. The default value is 1024.
- DBE_SQL.GET_RESULT_TEXT
This function returns the value of the TEXT type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULT_TEXT function is as follows:1 2 3 4 5
DBE_SQL.GET_RESULT_TEXT( context_id IN INT, pos IN INT ) RETURN TEXT;
Table 18 DBE_SQL.GET_RESULT_TEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.GET_RESULT_UNKNOWN
This function returns the value of an unknown type in a specified position of a cursor. It serves as an error handling API when the type is not unknown.
The prototype of the DBE_SQL.GET_RESULT_UNKNOWN function is as follows:1 2 3 4 5 6
DBE_SQL.GET_RESULT_UNKNOWN( context_id IN INT, pos IN INT, col_type IN TEXT ) RETURN INTEGER;
Table 19 DBE_SQL.GET_RESULT_UNKNOWN parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
col_type
TEXT
IN
No
Returned parameter type.
- DBE_SQL.DBE_SQL_GET_RESULT_CHAR
This function returns the value of the CHAR type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW. Different from DBE_SQL.GET_RESULT_CHAR, the length of the return value is not set and the entire string is returned.
The prototype of the DBE_SQL.DBE_SQL_GET_RESULT_CHAR function is as follows:1 2 3 4 5
DBE_SQL.DBE_SQL_GET_RESULT_CHAR( context_id IN INT, pos IN INT ) RETURN CHARACTER;
Table 20 DBE_SQL.DBE_SQL_GET_RESULT_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.DBE_SQL_GET_RESULT_LONG
This function returns the value of a long column type (not LONG or BIGINT) in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
Different from DBE_SQL.GET_RESULT_LONG, the length of the return value is not set and the entire BIGINT value is returned.
The prototype of the DBE_SQL.DBE_SQL_GET_RESULT_LONG function is as follows:1 2 3 4 5
DBE_SQL.DBE_SQL_GET_RESULT_LONG( context_id IN INT, pos IN INT ) RETURN BIGINT;
Table 21 DBE_SQL.DBE_SQL_GET_RESULT_LONG parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.DBE_SQL_GET_RESULT_RAW
This function returns the value of the RAW type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
Different from DBE_SQL.GET_RESULT_RAW, the length of the return value is not set and the entire string is returned.
The prototype of the DBE_SQL.DBE_SQL_GET_RESULT_RAW function is as follows:1 2 3 4 5
DBE_SQL.DBE_SQL_GET_RESULT_RAW( context_id IN INT, pos IN INT ) RETURN RAW;
Table 22 DBE_SQL.GET_RESULT_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be executed.
pos
INT
IN
No
Position of a dynamically defined column in the query.
- DBE_SQL.IS_ACTIVE
This function returns the status of a cursor. When a cursor is opened, parsed, executed, or defined, the value is TRUE. When a cursor is closed, the value is FALSE. If the status is unknown, an error is reported. In other cases, the cursor is closed by default.
The prototype of the DBE_SQL.IS_ACTIVE function is as follows:1 2 3 4
DBE_SQL.IS_ACTIVE( context_id IN INT ) RETURN BOOLEAN;
Table 23 DBE_SQL.IS_ACTIVE parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
- DBE_SQL.LAST_ROW_COUNT
Returns the accumulated count of data rows obtained after the latest NEXT_ROW execution.
The prototype of the DBE_SQL.LAST_ROW_COUNT function is as follows:
1 2 3
DBE_SQL.LAST_ROW_COUNT( ) RETURN INTEGER;
- DBE_SQL.RUN_AND_NEXT
Equivalent to calling SQL_RUN and NEXT_ROW in sequence.
The prototype of the DBE_SQL.RUN_AND_NEXT function is as follows:1 2 3 4
DBE_SQL.RUN_AND_NEXT( context_id IN INT ) RETURNS INTEGER;
Table 24 DBE_SQL.RUN_AND_NEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor whose query statement is to be parsed
- DBE_SQL.SQL_BIND_VARIABLE
This function is used to bind a parameter to an SQL statement. When an SQL statement is executed, the SQL statement is executed based on the bound value.
The prototype of the DBE_SQL.SQL_BIND_VARIABLE function is as follows:1 2 3 4 5 6 7
DBE_SQL.SQL_BIND_VARIABLE( context_id IN int, query_string IN text, language_flag IN anyelement, out_value_size IN int default null ) RETURNS void;
Table 25 DBE_SQL.SQL_BIND_VARIABLE parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
query_string
TEXT
IN
No
Name of the bound variable
language_flag
ANYELEMENT
IN
No
Bound value
out_value_size
INT
IN
Yes
Size of the return value. Default value: NULL.
- DBE_SQL.SQL_BIND_ARRAY
This function is used to bind a set of parameters to an SQL statement. When an SQL statement is executed, the SQL statement is executed based on the bound array.
The prototype of the DBE_SQL.SQL_BIND_ARRAY function is as follows:1 2 3 4 5 6 7 8 9 10 11 12 13 14
DBE_SQL.SQL_BIND_ARRAY( context_id IN int, query_string IN text, value IN anyarray ) RETURNS void; DBE_SQL.SQL_BIND_ARRAY( context_id IN int, query_string IN text, value IN anyarray, lower_index IN int, higher_index IN int ) RETURNS void;
Table 26 DBE_SQL.SQL_BIND_ARRAY parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
query_string
TEXT
IN
No
Name of the bound variable.
value
ANYARRAY
IN
No
Bound array.
lower_index
INT
IN
No
Minimum index of the bound array.
higher_index
INT
IN
No
Maximum index of the bound array.
- DBE_SQL.SET_RESULT_TYPE_INTS
This function defines columns of the INT array type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_INTS function is as follows:1 2 3 4 5 6 7 8
DBE_SQL.SET_RESULT_TYPE_INTS( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int ) RETURNS integer;
Table 27 DBE_SQL.SET_RESULT_TYPE_INTS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
- DBE_SQL.SET_RESULT_TYPE_TEXTS
This function defines columns of the TEXT array type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_TEXTS function is as follows:1 2 3 4 5 6 7 8 9
DBE_SQL.SET_RESULT_TYPE_TEXTS( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, maxsize IN int ) RETURNS VOID;
Table 28 DBE_SQL.SET_RESULT_TYPE_TEXTS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
maxsize
INT
IN
No
Maximum length of the defined TEXT type.
- DBE_SQL.SET_RESULT_TYPE_RAWS
This function defines columns of the RAW array type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_RAWS function is as follows:1 2 3 4 5 6 7 8 9
DBE_SQL.set_result_type_raws( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, column_size IN int ) RETURNS integer;
Table 29 DBE_SQL.SET_RESULT_TYPE_RAWS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
column_size
INT
IN
No
Column length.
- DBE_SQL.SET_RESULT_TYPE_BYTEAS
This function defines columns of the BYTEA array type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_BYTEAS function is as follows:1 2 3 4 5 6 7 8 9
DBE_SQL.set_result_type_byteas( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, column_size IN int ) RETURNS integer;
Table 30 DBE_SQL.SET_RESULT_TYPE_BYTEAS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
column_size
INT
IN
No
Column length.
- DBE_SQL.SET_RESULT_TYPE_CHARS
This function defines columns of the CHAR array type returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULT_TYPE_CHARS function is as follows:1 2 3 4 5 6 7 8 9
DBE_SQL.SET_RESULT_TYPE_CHARS( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, column_size IN int ) RETURNS integer;
Table 31 DBE_SQL.SET_RESULT_TYPE_CHARS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
column_size
INT
IN
No
Column length.
- DBE_SQL.SET_RESULTS_TYPE
This function defines columns returned from a given cursor and can be used only for the cursors defined by SELECT. The defined columns are identified by the relative positions in the query list. The data type of an input variable determines the corresponding column type.
The prototype of the DBE_SQL.SET_RESULTS_TYPE function is as follows:1 2 3 4 5 6 7 8
DBE_SQL.SET_RESULTS_TYPE( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, maxsize IN int DEFAULT 1024 ) returns void;
Table 32 DBE_SQL.SET_RESULTS_TYPE parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
maxsize
INT
IN
Yes
Maximum length of the defined type
- DBE_SQL.GET_RESULTS_INT
This stored procedure returns the value of the INT array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULTS_INT stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS_INT( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 33 DBE_SQL.GET_RESULTS_INT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_RESULTS_TEXT
This stored procedure returns the value of the TEXT array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULTS_TEXT stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS_TEXT( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 34 DBE_SQL.GET_RESULTS_TEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_RESULTS_RAW
This stored procedure returns the value of the RAW array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULTS_RAW stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS_RAW( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 35 DBE_SQL.GET_RESULTS_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_RESULTS_BYTEA
This stored procedure returns the value of the BYTEA array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULTS_BYTEA stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS_BYTEA( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 36 DBE_SQL.GET_RESULTS_BYTEA parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_RESULTS_CHAR
This stored procedure returns the value of the CHAR array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The prototype of the DBE_SQL.GET_RESULTS_CHAR stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS_CHAR( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 37 DBE_SQL.GET_RESULTS_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_RESULTS
This stored procedure returns the value of the array type in a specified position of a cursor and accesses the data obtained by DBE_SQL.NEXT_ROW.
The bottom-layer mechanism of DBE_SQL.GET_RESULTS is implemented through arrays. When different arrays are used to obtain the return value of the same column, NULL values are filled in the array due to discontinuous internal indexes to ensure the continuity of array indexes. As a result, the length of the returned result array is different from that of the Oracle database.
The prototype of the DBE_SQL.GET_RESULTS stored procedure is as follows:1 2 3 4 5
DBE_SQL.GET_RESULTS( context_id IN int, pos IN int, column_value INOUT anyarray );
Table 38 DBE_SQL.GET_RESULTS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.SQL_DESCRIBE_COLUMNS
This function is used to describe column information and can be used only for cursors defined by SELECT.
The prototype of the DBE_SQL.SQL_DESCRIBE_COLUMNS function is as follows:1 2 3 4 5
DBE_SQL.SQL_DESCRIBE_COLUMNS( context_id IN int, col_cnt INOUT int, desc_t INOUT dbe_sql.desc_tab )RETURNS record;
Table 39 DBE_SQL.SQL_DESCRIBE_COLUMNS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
col_cnt
INT
INOUT
No
Number of columns returned.
desc_t
DBE_SQL.DESC_TAB
INOUT
No
Description of the returned column.
- DBE_SQL.DESCRIBE_COLUMNS
This stored procedure describes column information and can be used only for cursors defined by SELECT. This API is developed for compatibility purposes.
The prototype of the DBE_SQL.DESCRIBE_COLUMNS stored procedure is as follows:
1 2 3 4 5
DBE_SQL.DESCRIBE_COLUMNS( context_id IN int, col_cnt OUT int, desc_t OUT dbe_sql.desc_tab )
Table 40 DBE_SQL.DESCRIBE_COLUMNS parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
col_cnt
INT
OUT
No
Number of columns returned.
desc_t
DBE_SQL.DESC_TAB
OUT
No
Description of the returned column.
- DBE_SQL.BIND_VARIABLE
This function is used to bind parameters. You are advised to use DBE_SQL.SQL_BIND_VARIABLE.
- DBE_SQL.SQL_SET_RESULTS_TYPE_C
This function is used to dynamically define a column of the array type. You are advised not to use it.
The prototype of the DBE_SQL.SQL_SET_RESULTS_TYPE_C function is as follows:1 2 3 4 5 6 7 8 9
DBE_SQL.sql_set_results_type_c( context_id IN int, pos IN int, column_ref IN anyarray, cnt IN int, lower_bnd IN int, col_type IN anyelement, maxsize IN int )return integer;
Table 41 DBE_SQL.SQL_SET_RESULTS_TYPE_C parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Position of a dynamically defined column in the query.
column_ref
ANYARRAY
IN
No
Type of the returned array.
cnt
INT
IN
No
Number of values obtained at a time.
lower_bnd
INT
IN
No
Start index when an array is returned.
col_type
ANYELEMENT
IN
No
Variable type corresponding to the returned array type.
maxsize
INT
IN
No
Maximum length of the defined type.
- DBE_SQL.SQL_GET_VALUES_C
This function is used to read a dynamically defined column value. You are advised not to use it.
The prototype of the DBE_SQL.SQL_GET_VALUES_C function is as follows:1 2 3 4 5 6
DBE_SQL.sql_get_values_c( context_id IN int, pos IN int, results_type INOUT anyarray, result_type IN anyelement )return anyarray;
Table 42 DBE_SQL.SQL_GET_VALUES_C parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
INT
IN
No
Parameter position
results_type
ANYARRAY
INOUT
No
Obtained result.
result_type
ANYELEMENT
IN
No
Type of the obtained result.
- DBE_SQL.GET_VARIABLE_RESULT
This stored procedure returns the value of the bound OUT parameter and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_VARIABLE_RESULT stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_variable_result( context_id IN int, pos IN VARCHAR2, column_value INOUT anyelement );
Table 43 DBE_SQL.GET_VARIABLE_RESULT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
column_value
ANYELEMENT
INOUT
No
Return value.
- DBE_SQL.GET_VARIABLE_RESULT_CHAR
This function is used to return the value of the bound OUT parameter of the CHAR type and obtain the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_VARIABLE_RESULT_CHAR function is as follows:1 2 3 4 5
DBE_SQL.get_variable_result_char( context_id IN int, pos IN VARCHAR2 ) RETURNS char
Table 44 DBE_SQL.GET_VARIABLE_RESULT_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
- DBE_SQL.GET_VARIABLE_RESULT_RAW
This stored procedure returns the value of the bound OUT parameter of the RAW type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_VARIABLE_RESULT_RAW stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_variable_result_raw( context_id IN int, pos IN VARCHAR2, value INOUT anyelement );
Table 45 DBE_SQL.GET_VARIABLE_RESULT_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
value
ANYELEMENT
INOUT
No
Return value.
- DBE_SQL.GET_VARIABLE_RESULT_TEXT
This function is used to return the value of the bound OUT parameter of the TEXT type and obtain the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_VARIABLE_RESULT_TEXT function is as follows:1 2 3 4 5
CREATE OR REPLACE FUNCTION DBE_SQL.get_variable_result_text( context_id IN int, pos IN VARCHAR2 ) RETURNS text
Table 46 DBE_SQL.GET_VARIABLE_RESULT_TEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
- DBE_SQL.GET_VARIABLE_RESULT_INT
This stored procedure returns the value of the bound OUT parameter of the INT type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_VARIABLE_RESULT_INT stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_variable_result_int( context_id IN int, pos IN VARCHAR2, value INOUT anyelement );
Table 47 DBE_SQL.GET_VARIABLE_RESULT_INT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
value
ANYELEMENT
INOUT
No
Return value.
- DBE_SQL.GET_ARRAY_RESULT_TEXT
This stored procedure returns the value of the bound OUT parameter of the TEXT array type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_ARRAY_RESULT_TEXT stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_array_result_text( context_id IN int, pos IN VARCHAR2, column_value INOUT anyarray );
Table 48 DBE_SQL.GET_ARRAY_RESULT_TEXT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_ARRAY_RESULT_RAW
This stored procedure returns the value of the bound OUT parameter of the RAW array type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_ARRAY_RESULT_RAW stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_array_result_raw( context_id IN int, pos IN VARCHAR2, column_value INOUT anyarray );
Table 49 DBE_SQL.GET_ARRAY_RESULT_RAW parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_ARRAY_RESULT_CHAR
This stored procedure returns the value of the bound OUT parameter of the CHAR array type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_ARRAY_RESULT_CHAR stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_array_result_char( context_id IN int, pos IN VARCHAR2, column_value INOUT anyarray );
Table 50 DBE_SQL.GET_ARRAY_RESULT_CHAR parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
column_value
ANYARRAY
INOUT
No
Return value.
- DBE_SQL.GET_ARRAY_RESULT_INT
This stored procedure returns the value of the bound OUT parameter of the INT array type and obtains the OUT parameter in a stored procedure.
The prototype of the DBE_SQL.GET_ARRAY_RESULT_INT stored procedure is as follows:1 2 3 4 5
DBE_SQL.get_array_result_int( context_id IN int, pos IN VARCHAR2, column_value INOUT anyarray );
Table 51 DBE_SQL.GET_ARRAY_RESULT_INT parameters Parameter
Type
Input/Output Parameter
Can Be Empty
Description
context_id
INT
IN
No
ID of the cursor to be queried.
pos
VARCHAR2
IN
No
Name of the bound parameter.
column_value
ANYARRAY
INOUT
No
Return value.
Examples
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-- Example 1 -- Create a table and insert data into the table. CREATE TABLE test_desc_cols( id NUMBER, name VARCHAR2(50) ); INSERT INTO test_desc_cols(id, name) VALUES (1, 'xiaoming'); INSERT INTO test_desc_cols(id, name) VALUES (2, 'xiaohong'); INSERT INTO test_desc_cols(id, name) VALUES (3, 'xiaolan'); DECLARE context_id INTEGER; col_cnt INTEGER; v_id int; v_name varchar2; execute_ret INTEGER; BEGIN -- Open a cursor. context_id := DBE_SQL.REGISTER_CONTEXT(); -- Compile the cursor. DBE_SQL.SQL_SET_SQL(context_id, 'SELECT * FROM test_desc_cols', 2); -- Set the return value type of a column. DBE_SQL.SET_RESULT_TYPE(context_id, 1, v_id); DBE_SQL.SET_RESULT_TYPE(context_id, 2, v_name); execute_ret := DBE_SQL.SQL_RUN(context_id); loop exit when (DBE_SQL.NEXT_ROW(context_id) <= 0); -- Obtain values. DBE_SQL.GET_RESULT(context_id, 1, v_id); DBE_SQL.GET_RESULT(context_id, 2, v_name); -- Output the result. dbe_output.print_line('id:'|| v_id || ' name:' || v_name); end loop; DBE_SQL.SQL_UNREGISTER_CONTEXT(context_id); END; / -- Expected result: id:1 name:xiaoming id:2 name:xiaohong id:3 name:xiaolan ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop table if exists test_desc_cols; DROP TABLE -- Example 2 CREATE OR REPLACE PROCEDURE test_square(n NUMBER, square OUT NUMBER) IS BEGIN square := n * n; END; / CREATE PROCEDURE DECLARE cur NUMBER; query varchar(2000); ret integer; n NUMBER; square Integer; BEGIN n := 2; cur := DBE_SQL.REGISTER_CONTEXT(); query := 'BEGIN test_square(:n_bnd, :square_bnd); END;'; DBE_SQL.SQL_SET_SQL(cur, query, 2); DBE_SQL.SQL_BIND_VARIABLE(cur, 'n_bnd', n); DBE_SQL.SQL_BIND_VARIABLE(cur, 'square_bnd', square); ret := DBE_SQL.SQL_RUN(cur); DBE_SQL.GET_VARIABLE_RESULT(cur, 'square_bnd', square); DBE_OUTPUT.PRINT_LINE('square = ' || square); DBE_SQL.SQL_UNREGISTER_CONTEXT(cur); END; / -- Expected result: square = 4 ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop PROCEDURE test_square; DROP PROCEDURE -- Example 3 -- Examples of executing DESCRIBE_COLUMNS, RUN_AND_NEXT, and LAST_ROW_COUNT -- Create a table and insert data into the table. CREATE TABLE test_desc_cols( id NUMBER, name VARCHAR2(50) ); INSERT INTO test_desc_cols(id, name) VALUES (1, 'xiaoming'); INSERT INTO test_desc_cols(id, name) VALUES (2, 'xiaohong'); INSERT INTO test_desc_cols(id, name) VALUES (3, 'xiaolan'); -- Example 4 DROP TABLE if exists dbe_sql_tab; create table dbe_sql_tab(a char(30), b int, c text, d bytea, e text, f bool); insert into dbe_sql_tab values('aaa', 10, 'abcdefghijklmn', 'a', 'abcdefghijklmn', true); DECLARE cursorid int; execute_ret int; query varchar(2000); err numeric; v_char char(30); v_int int; v_long text; v_long_len int; v_bytea bytea; v_text text; BEGIN query := 'select * from dbe_sql_tab'; cursorid := DBE_SQL.register_context(); DBE_SQL.sql_set_sql(cursorid, query, 1); DBE_SQL.SET_RESULT_TYPE_CHAR(cursorid, 1, v_char, 30); DBE_SQL.SET_RESULT_TYPE_INT(cursorid, 2); DBE_SQL.SET_RESULT_TYPE_LONG(cursorid, 3); DBE_SQL.SET_RESULT_TYPE_RAW(cursorid, 4, v_bytea, 8); DBE_SQL.SET_RESULT_TYPE_TEXT(cursorid, 5, 1024); execute_ret := DBE_SQL.sql_run(cursorid); loop exit when (DBE_SQL.next_row(cursorid) <= 0); DBE_SQL.GET_RESULT_CHAR(cursorid, 1, v_char); v_int := DBE_SQL.GET_RESULT_INT(cursorid, 2); DBE_SQL.GET_RESULT_LONG(cursorid, 3, 3, 3, v_long, v_long_len); DBE_SQL.GET_RESULT_RAW(cursorid, 4, v_bytea); v_text := DBE_SQL.GET_RESULT_TEXT(cursorid, 5); dbe_output.print_line('a:'|| v_char); dbe_output.print_line('b:'|| v_int); dbe_output.print_line('c:'|| v_long); raise info 'd:%', v_bytea; dbe_output.print_line('e:'|| v_text); end loop; DBE_SQL.sql_unregister_context(cursorid); END; / -- Expected result: a:aaa b:10 c:cde INFO: d:\x61 e:abcdefghijklmn ANONYMOUS BLOCK EXECUTE DECLARE cursorid int; execute_ret int; query varchar(2000); BEGIN query := 'select * from dbe_sql_tab'; cursorid := DBE_SQL.register_context(); DBE_SQL.sql_set_sql(cursorid, query, 1); DBE_SQL.SET_RESULT_TYPE_UNKNOWN(cursorid, 7, 'boolean'); execute_ret := DBE_SQL.sql_run(cursorid); loop exit when (DBE_SQL.next_row(cursorid) <= 0); DBE_SQL.GET_RESULT_UNKNOWN(cursorid, 7, 'boolean'); end loop; DBE_SQL.sql_unregister_context(cursorid); END; / -- Expected result: ERROR: UnSupport data type for set_result_type(context: 8, pos: 7, 'boolean') CONTEXT: SQL statement "CALL pg_catalog.report_application_error('UnSupport data type for set_result_type(context: '||context_id||', pos: '||pos||', '||PG_CATALOG.QUOTE_LITERAL(col_type)||')')" PL/pgSQL function dbe_sql.set_result_type_unknown(integer,integer,text) line 8 at PERFORM SQL statement "CALL dbe_sql.set_result_type_unknown(cursorid,7,'boolean')" PL/pgSQL function inline_code_block line 10 at PERFORM -- Clean the environment. drop table dbe_sql_tab; DROP TABLE -- Example 5 drop table if exists dbe_sql_tab; create table dbe_sql_tab(a char(30), b raw); insert into dbe_sql_tab values('aaa', HEXTORAW('DEADBEEF')); DECLARE cursorid int; execute_ret int; query varchar(2000); v_char char(30); v_raw bytea; BEGIN query := 'select * from dbe_sql_tab'; cursorid := DBE_SQL.register_context(); DBE_SQL.sql_set_sql(cursorid, query, 2); DBE_SQL.SET_RESULT_TYPE(cursorid, 1, v_char); DBE_SQL.SET_RESULT_TYPE_RAW(cursorid, 2, v_raw, 1024); execute_ret := DBE_SQL.sql_run(cursorid); loop exit when (DBE_SQL.next_row(cursorid) <= 0); v_char := DBE_SQL.DBE_SQL_GET_RESULT_CHAR(cursorid, 1); v_raw := DBE_SQL.DBE_SQL_GET_RESULT_RAW(cursorid, 2); dbe_output.print_line('a:'|| v_char); raise info 'b:%', v_raw; end loop; DBE_SQL.sql_unregister_context(cursorid); END; / -- Expected result: a:aaa INFO: b:\x4445414442454546 ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop table dbe_sql_tab; DROP TABLE -- Example 6 DECLARE cursorid int; execute_ret int; is_open boolean; BEGIN cursorid := DBE_SQL.register_context(); is_open := DBE_SQL.IS_ACTIVE(cursorid); dbe_output.print_line('is_open:' ||is_open); DBE_SQL.sql_unregister_context(cursorid); is_open := DBE_SQL.IS_ACTIVE(cursorid); dbe_output.print_line('is_open:' ||is_open); END; / -- Expected result: is_open:true is_open:false ANONYMOUS BLOCK EXECUTE -- Example 7 create table tbl(a integer ,b varchar(100)); DECLARE c integer; v1 integer[]; v2 varchar2[]; query varchar(2000); ret integer; begin c := dbe_sql.register_context(); query := 'insert into tbl(a,b) values(:v_1, :v_2);'; dbe_sql.sql_set_sql(c, query, 2); v1(1) := 1; v1(2) := 2; v2(1) := '1'; v2(2) := '2'; dbe_sql.sql_bind_array(c, 'v_1', v1); dbe_sql.sql_bind_array(c, 'v_2', v2); ret := dbe_sql.sql_run(c); dbe_sql.sql_unregister_context(c); end; / ANONYMOUS BLOCK EXECUTE select * from tbl order by a; -- Expected result: a | b ---+--- 1 | 1 2 | 2 (2 rows) -- Clean the environment. drop table tbl; DROP TABLE -- Example 8 -- Prerequisites drop table if exists dbe_sql_tab; create table dbe_sql_tab(a int, b text, c raw, d text, e char, f int); insert into dbe_sql_tab values(1, '9', '5', '13', 'a', 1); insert into dbe_sql_tab values(2, '9', '6', '14', 'b', 2); insert into dbe_sql_tab values(3, '7', '7', '15', 'c', 3); insert into dbe_sql_tab values(4, '6', '8', '16', 'd', 4); DECLARE query varchar(2000); context_id int; execute_ret int; v_id int; v_ints int[]; v_texts text[]; v_raws raw[]; v_byteas bytea[]; v_chars character[]; v_type int[]; BEGIN query := ' select * from dbe_sql_tab order by 1'; context_id := dbe_sql.register_context(); dbe_sql.sql_set_sql(context_id, query, 1); DBE_SQL.SET_RESULT_TYPE_INTS(context_id, 1, v_ints, 3, 1); DBE_SQL.SET_RESULT_TYPE_TEXTS(context_id, 2, v_texts, 3, 1, 1024); DBE_SQL.SET_RESULT_TYPE_RAWS(context_id, 3, v_raws, 3, 1, 1024); DBE_SQL.SET_RESULT_TYPE_BYTEAS(context_id, 4, v_byteas, 3, 1, 1024); DBE_SQL.SET_RESULT_TYPE_CHARS(context_id, 5, v_chars, 3, 1, 1024); DBE_SQL.SET_RESULTS_TYPE(context_id, 6, v_type, 3, 1); execute_ret := dbe_sql.sql_run(context_id); loop v_id := dbe_sql.next_row(context_id); v_ints := DBE_SQL.GET_RESULTS_INT(context_id, 1, v_ints); v_texts := DBE_SQL.GET_RESULTS_TEXT(context_id, 2, v_texts); v_raws := DBE_SQL.GET_RESULTS_RAW(context_id, 3, v_raws); v_byteas := DBE_SQL.GET_RESULTS_BYTEA(context_id, 4, v_byteas); v_chars := DBE_SQL.GET_RESULTS_CHAR(context_id, 5, v_chars); v_type := DBE_SQL.GET_RESULTS(context_id, 6, v_type); exit when(v_id != 3); end loop; FOR i IN v_ints.FIRST .. v_ints.LAST LOOP dbe_output.print_line('int' || i || ' = ' || v_ints[i]); END LOOP; FOR i IN v_texts.FIRST .. v_texts.LAST LOOP dbe_output.print_line('text' || i || ' = ' || v_texts[i]); END LOOP; FOR i IN v_raws.FIRST .. v_raws.LAST LOOP dbe_output.print_line('raw' || i || ' = ' || v_raws[i]); END LOOP; FOR i IN v_byteas.FIRST .. v_byteas.LAST LOOP dbe_output.print_line('bytea' || i || ' = ' || v_byteas[i]); END LOOP; FOR i IN v_chars.FIRST .. v_chars.LAST LOOP dbe_output.print_line('char' || i || ' = ' || v_chars[i]); END LOOP; FOR i IN v_type.FIRST .. v_type.LAST LOOP dbe_output.print_line('type' || i || ' = ' || v_type[i]); END LOOP; dbe_sql.sql_unregister_context(context_id); END; / -- Expected result: int1 = 1 int2 = 2 int3 = 3 int4 = 4 text1 = 9 text2 = 9 text3 = 7 text4 = 6 raw1 = 05 raw2 = 06 raw3 = 07 raw4 = 08 bytea1 = \x3133 bytea2 = \x3134 bytea3 = \x3135 bytea4 = \x3136 char1 = a char2 = b char3 = c char4 = d type1 = 1 type2 = 2 type3 = 3 type4 = 4 ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop table if exists dbe_sql_tab; DROP TABLE -- Example 9 -- Prerequisites drop table if exists dbe_sql_tab; create table dbe_sql_tab(a int ,b int); insert into dbe_sql_tab values(1,3); DECLARE context_id int; type re_rssc is record (col_num int, desc_col dbe_sql.desc_tab); employer re_rssc; res re_rssc; d int; dd dbe_sql.desc_tab; query varchar(2000); BEGIN query := 'select * from dbe_sql_tab'; -- Open a cursor. context_id := dbe_sql.register_context(); -- Compile the cursor. dbe_sql.sql_set_sql(context_id, query, 1); -- Execute the cursor. res := dbe_sql.sql_describe_columns(context_id, d,dd); -- Output the result. dbe_output.print_line('col_num:' || res.col_num); dbe_output.print_line('col_type:' || res.desc_col[1].col_type); dbe_output.print_line('col_max_len:' || res.desc_col[1].col_max_len); dbe_output.print_line('col_name:' || res.desc_col[1].col_name); dbe_output.print_line('col_name_len:' || res.desc_col[1].col_name_len); dbe_output.print_line('col_schema_name:' || res.desc_col[1].col_schema_name); dbe_output.print_line('col_schema_name_len:' || res.desc_col[1].col_schema_name_len); dbe_output.print_line('col_precision:' || res.desc_col[1].col_precision); dbe_output.print_line('col_scale:' || res.desc_col[1].col_scale); dbe_output.print_line('col_charsetid:' || res.desc_col[1].col_charsetid); dbe_output.print_line('col_charsetform:' || res.desc_col[1].col_charsetform); dbe_output.print_line('col_null_ok:' || res.desc_col[1].col_null_ok); -- Close the cursor. dbe_sql.sql_unregister_context(context_id); END; / -- Expected result: col_num:2 col_type:23 col_max_len:4 col_name:a col_name_len:1 col_schema_name: col_schema_name_len:0 col_precision:0 col_scale:0 col_charsetid:0 col_charsetform:0 col_null_ok:true ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop table if exists dbe_sql_tab; DROP TABLE -- Example 10 drop table if exists dbe_sql_tab; create table dbe_sql_tab(a int); insert into dbe_sql_tab values(1); insert into dbe_sql_tab values(2); insert into dbe_sql_tab values(3); DECLARE query varchar(2000); context_id int; execute_ret int; v_id int; v_ints int[]; i1 integer; BEGIN query := 'select * from dbe_sql_tab order by 1'; context_id := dbe_sql.register_context(); dbe_sql.sql_set_sql(context_id, query, 1); DBE_SQL.SQL_SET_RESULTS_TYPE_C(context_id, 1, v_ints, 3, 1, i1, 0); execute_ret := dbe_sql.sql_run(context_id); loop v_id := dbe_sql.next_row(context_id); v_ints := DBE_SQL.SQL_GET_VALUES_C(context_id, 1, v_ints, i1); exit when(v_id != 3); end loop; FOR i IN v_ints.FIRST .. v_ints.LAST LOOP dbe_output.print_line('int' || i || ' = ' || v_ints[i]); END LOOP; dbe_sql.sql_unregister_context(context_id); END; / -- Expected result: int1 = 1 int2 = 2 int3 = 3 ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop table if exists dbe_sql_tab; DROP TABLE -- Example 11 CREATE OR REPLACE PROCEDURE test_proc(out_int out Integer, out_char out char, out_raw out raw, out_text out text) IS BEGIN out_int := 1; out_char := 'a'; out_raw := 'b'; out_text := 'c'; END; / CREATE PROCEDURE DECLARE cur NUMBER; query varchar(2000); ret integer; v_int Integer; v_char char; v_raw raw; v_text text; BEGIN cur := DBE_SQL.REGISTER_CONTEXT(); query := 'BEGIN test_proc(:v_int, :v_char, :v_raw, :v_text); END;'; DBE_SQL.SQL_SET_SQL(cur, query, 2); DBE_SQL.SQL_BIND_VARIABLE(cur, 'v_int', v_int); DBE_SQL.SQL_BIND_VARIABLE(cur, 'v_char', v_char, 1024); DBE_SQL.SQL_BIND_VARIABLE(cur, 'v_raw', v_raw, 1024); DBE_SQL.SQL_BIND_VARIABLE(cur, 'v_text', v_text, 1024); ret := DBE_SQL.SQL_RUN(cur); DBE_SQL.GET_VARIABLE_RESULT_INT(cur, 'v_int', v_int); v_char := DBE_SQL.GET_VARIABLE_RESULT_CHAR(cur, 'v_char'); DBE_SQL.GET_VARIABLE_RESULT_RAW(cur, 'v_raw', v_raw); v_text := DBE_SQL.GET_VARIABLE_RESULT_TEXT(cur, 'v_text'); DBE_OUTPUT.PRINT_LINE('v_int = ' || v_int); DBE_OUTPUT.PRINT_LINE('v_char = ' || v_char); DBE_OUTPUT.PRINT_LINE('v_raw = ' || v_raw); DBE_OUTPUT.PRINT_LINE('v_text = ' || v_text); DBE_SQL.SQL_UNREGISTER_CONTEXT(cur); END; / -- Expected result: v_int = 1 v_char = a v_raw = 0B v_text = c ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop procedure test_proc; DROP PROCEDURE -- Example 12 CREATE OR REPLACE PROCEDURE test_proc(out_int out Integer[], out_char out char[], out_raw out raw[], out_text out text[]) IS BEGIN out_int(0) := 1; out_char(0) := 'a'; out_raw(0) := 'b'; out_text(0) := 'c'; END; / CREATE PROCEDURE DECLARE cur NUMBER; query varchar(2000); ret integer; v_int Integer[]; v_char char[]; v_raw raw[]; v_text text[]; BEGIN cur := DBE_SQL.REGISTER_CONTEXT(); query := 'call test_proc(:v_int, :v_char, :v_raw, :v_text);'; DBE_SQL.SQL_SET_SQL(cur, query, 1); DBE_SQL.SQL_BIND_ARRAY(cur, 'v_int', v_int); DBE_SQL.SQL_BIND_ARRAY(cur, 'v_char', v_char); DBE_SQL.SQL_BIND_ARRAY(cur, 'v_raw', v_raw); DBE_SQL.SQL_BIND_ARRAY(cur, 'v_text', v_text); ret := DBE_SQL.SQL_RUN(cur); DBE_SQL.GET_ARRAY_RESULT_INT(cur, 'v_int', v_int); DBE_SQL.GET_ARRAY_RESULT_CHAR(cur, 'v_char', v_char); DBE_SQL.GET_ARRAY_RESULT_RAW(cur, 'v_raw', v_raw); DBE_SQL.GET_ARRAY_RESULT_TEXT(cur, 'v_text', v_text); DBE_OUTPUT.PRINT_LINE('v_int = ' || v_int(0)); DBE_OUTPUT.PRINT_LINE('v_char = ' || v_char(0)); DBE_OUTPUT.PRINT_LINE('v_raw = ' || v_raw(0)); DBE_OUTPUT.PRINT_LINE('v_text = ' || v_text(0)); DBE_SQL.SQL_UNREGISTER_CONTEXT(cur); END; / -- Expected result: v_int = 1 v_char = a v_raw = 0B v_text = c ANONYMOUS BLOCK EXECUTE -- Clean the environment. drop PROCEDURE test_proc; DROP PROCEDURE |
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