119 lines
3.6 KiB
SQL
119 lines
3.6 KiB
SQL
SET PATH *LIBL ;
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CREATE OR REPLACE FUNCTION RESTAPI.EXECUTE_SQL2 (
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INAPPVER VARCHAR(10) DEFAULT 'v1' ,
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INAPPNAME VARCHAR(128) DEFAULT '' ,
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INAPPFUNC VARCHAR(128) DEFAULT '' ,
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INSUBSTITUTE VARCHAR(10240) DEFAULT NULL )
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RETURNS CLOB(2147483647)
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LANGUAGE SQL
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SPECIFIC RESTAPI.EXECUTE_SQL2
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NOT DETERMINISTIC
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MODIFIES SQL DATA
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CALLED ON NULL INPUT
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NOT FENCED
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SET OPTION ALWBLK = *ALLREAD ,
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ALWCPYDTA = *OPTIMIZE ,
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COMMIT = *NONE ,
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DBGVIEW = *SOURCE ,
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DECRESULT = (31, 31, 00) ,
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DYNDFTCOL = *NO ,
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DYNUSRPRF = *OWNER ,
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SRTSEQ = *HEX
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BEGIN
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DECLARE SQL_STATEMENT VARCHAR ( 32000 ) DEFAULT NULL ;
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DECLARE SQL_PARAMS VARCHAR ( 10240 ) CCSID 1208 DEFAULT NULL ;
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DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
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BEGIN
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DECLARE V_SQLSTATE CHAR ( 5 ) ;
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DECLARE V_DB2_RETURN_CODE INT ;
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DECLARE V_DB2_MESSAGE_ID CHAR ( 7 ) ;
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DECLARE V_ERROR_MESSAGE CLOB ( 2048 ) ;
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GET DIAGNOSTICS CONDITION 1
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V_DB2_RETURN_CODE = DB2_RETURNED_SQLCODE ,
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V_SQLSTATE = RETURNED_SQLSTATE ,
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V_ERROR_MESSAGE = MESSAGE_TEXT ,
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V_DB2_MESSAGE_ID = DB2_MESSAGE_ID ;
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RETURN
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(
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VALUES JSON_OBJECT (
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'success' VALUE 'false' , 'SQLInfo' VALUE JSON_OBJECT (
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'SQLState' VALUE V_SQLSTATE ,
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'SQLCode' VALUE V_DB2_RETURN_CODE ,
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'messageID' VALUE V_DB2_MESSAGE_ID ,
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'message' VALUE V_ERROR_MESSAGE ,
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'currentTimestamp' VALUE CURRENT_TIMESTAMP
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) , 'SQLStatement' VALUE SQL_STATEMENT FORMAT JSON
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) ) ;
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END ;
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-- Get SQL template
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SET SQL_STATEMENT = (
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SELECT SQLSTMT
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FROM RESTAPI . SQLSTMTS
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WHERE ( APPVER , APPNAME , APPFUNC ) = ( INAPPVER ,
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INAPPNAME , INAPPFUNC ) ) ;
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-- Normalize substitute JSON into array form
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IF INSUBSTITUTE IS NOT NULL
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AND TRIM ( INSUBSTITUTE ) <> '' THEN
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IF CISTOOLS . JSON_TYPE ( INSUBSTITUTE ) = 'array' THEN
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SET SQL_PARAMS = INSUBSTITUTE ;
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ELSE
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SET SQL_PARAMS = JSON_ARRAY ( INSUBSTITUTE FORMAT JSON ) ;
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END IF ;
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END IF ;
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-- Substitute parameters if we have both template and subs
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IF SQL_STATEMENT IS NOT NULL
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AND SQL_PARAMS IS NOT NULL THEN
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FOR SELECT APPPARAM
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FROM TABLE (
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RESTAPI . GET_PARAM_PLACEHOLDERS (
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INAPPVER , INAPPNAME , INAPPFUNC )
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)
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DO
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-- Figure out type of this param
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SET SQL_STATEMENT = REPLACE (
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SQL_STATEMENT , '{{' || TRIM ( APPPARAM ) || '}}' ,
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IFNULL (
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JSON_QUERY ( SQL_PARAMS ,
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'$[*].' || TRIM ( APPPARAM ) ) , '{{' ||
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TRIM ( APPPARAM ) || '}}' ) ) ;
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END FOR ;
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END IF ;
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-- Execute dynamically
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SET CISTOOLS . SQL_STATEMENT = SQL_STATEMENT ;
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SET SQL_STATEMENT = 'Values ((' || SQL_STATEMENT || ')) Into ?' ;
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PREPARE SQL_ FROM SQL_STATEMENT ;
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EXECUTE SQL_ USING CISTOOLS . SQL_CLOB ;
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-- After Execute Sql_ Using Cistools.Sql_Clob;
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-- Detect if Cistools.Sql_Clob is already JSON object with success/data/result
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IF LEFT ( LTRIM ( CISTOOLS . SQL_CLOB ) , 1 ) = '{'
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AND ( LOCATE ( '"success"' , CISTOOLS . SQL_CLOB ) > 0 )
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AND ( LOCATE ( '"data"' , CISTOOLS . SQL_CLOB ) > 0
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OR LOCATE ( '"result"' , CISTOOLS . SQL_CLOB ) > 0
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OR LOCATE ( '"SQLInfo"' , CISTOOLS . SQL_CLOB ) > 0 ) THEN
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IF LOCATE ( '"SQLInfo"' , CISTOOLS . SQL_CLOB ) > 0 THEN
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RETURN
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JSON_OBJECT (
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'SQLStatement' : SQL_STATEMENT , 'substitute' : SQL_PARAMS ,
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'error' : CISTOOLS . SQL_CLOB FORMAT JSON
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) ;
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END IF ;
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-- Return raw JSON as is
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RETURN CISTOOLS . SQL_CLOB ;
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ELSE
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-- Wrap in standard envelope
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RETURN JSON_OBJECT (
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'success' : 'true' , 'data' : CISTOOLS . SQL_CLOB FORMAT JSON
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) ;
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END IF ;
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END ;
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GRANT ALTER , EXECUTE
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ON SPECIFIC FUNCTION RESTAPI.EXECUTE_SQL2
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TO AMAPICS WITH GRANT OPTION ;
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GRANT EXECUTE
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ON SPECIFIC FUNCTION RESTAPI.EXECUTE_SQL2
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TO PUBLIC ;
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