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Autor: SAGE
Commando SQL
Autor: SAGE
Commando SQL
Sql allows you to execute a Select statement in the database.Syntax
For (VARIA_LIST) From DATAB_TYPE Sql SQL_STATEMENT As [CLASS]
Next
VARIA_LISTis a list ofVARIAseparated by commas.VARIAcan contain one of the following syntaxes:DECLARATIONVARNAMEDECLARATIONVARNAME(INDEX_SEP)
DECLARATIONis a declaration keyword that can be Char, Shortint, Integer, Date, TinyInt, Decimal, Clbfile, Blbfile, Datetime, or Uuident. IfDECLARATIONis Char,VARNAMEmust be followed by(N)whereNis the maximum size of the string, before a possible list of (INDEX_SEP).VARNAMEis a variable name starting with a letter, and followed by letters, digits, or underscores.INDEX_SEPis a list ofDIMENSIONorDIMENSION_RANGEseparated by commas. If 'N' commas are given, it describes an array of dimension 'N+1'. The number of commas is therefore limited to 3.DIMENSION_RANGEhas the following syntax:DIMENSION``..``DIMENSION.DIMENSIONis an expression returning a numeric dimension.DATAB_TYPEis a string expression that returns a code defining the database used.SQL_STATEMENTis a string expression that returns the SQL Select statement executed by theSqlinstruction. It can be an array of string variables, with or without a range of indexes. If no range is given, all the different indexes of the array are concatenated to give the SQL statement. Otherwise, only the elements within the range are used.
Examples
# Example 1: Request to select a maximum value in a table
Local Char REQUEST(255)
Local Integer MAX_VAL
REQUEST="select max(ACCNUM_0) From GACCENTRYD"
For (Integer NUM) From "3" Sql REQUEST As [XXX]
MAX_VAL=[F:XXX]NUM
Next
# Example 2: Request to select the different fields of a table in data dictionary
Local Char REQUEST(255)
Local Char MYTABLE(20)
...
REQUEST="select CODZONE_0, DIME_0 From ATABZON Where CODFIC='"+MYTABLE+"'"
For (Char FIELD(12),Integer DIMENSION) From "3" Sql REQUEST As [ABB]
# Here, we have for every loop FIELD that is equal to the column name and DIMENSION to its dimension
Next
# Example 3: Request with an array
Local Char REQUEST(255)(1..5)
REQUEST(1)="select BPCNAM_0"
REQUEST(2)=" From BPARTNER"
REQUEST(3)=" Where BPCFLG_0=1"
# First request without where
For (Char NAMES(20))From "S" Sql REQUEST(1..2) As [BPC]
# All the lines will be seen
Next
# Second request with the where
For (Char NAMES(20))From "S" Sql REQUEST(1..3) As [BPC]
# Only the lines with BPCFLG_0 equal to 1 will be seen
Next
# Example 3: Use the default database
Local Integer DBTYPE
Local DATABASE_TYPE(10)
DBTYPE = fmet GACTX.APARAM.AGETVALNUM([V]CST_ALEVFOLD,"","TYPDBA")
DATABASE_TYPE=string$(DBTYPE=1,"O")+string$(DBTYPE=2,"S")
For (Integer INDEX,Char NAMES(20)(1..2)) From DATABASE_TYPE SQL "Select INDEX_0, NAME_0, NAME_1 From MYTABLE" As [MYT]
# On every loop instance, we have the following values available:
# [MYT]INDEX, [MYT]NAMES(1), [MYT]NAMES(2)
Next
Description
Sql allows you to execute a Select statement on the database. The list of parameters in this syntax will be filled by the data returned in every loop for one of the lines of the cursor.
The database type is given by the following values:
* "o","O","3" indicates Oracle.
- "s","S","5" indicates SQL server.
* "o","O","3" indicates Oracle.
- "s","S","5" indicates SQL server.
The SQL expression can be given with a string array. When this happens, all the lines of the array (limited to a range if a range is given) are concatenated to give the SQL request to be executed.
The class abbreviation is used to access the variables in the list.
Associated errors
| Error code | Description |
|---|---|
| 19 | Database incorrect: the database type is not Oracle or SQL server. |
| 69 | Incorrect arguments: the argument list has less or more than the number of columns returned by the select statement, or the data type does not fit with the columns returned. |
| 75 | Database error: a column mentioned in the SQL statement does not exist. |