Procedures
Snowflake CREATE PROCEDURE is defined in SQL Syntax whereas its inner statements are defined in JavaScript.
Some parts in the output code are omitted for clarity reasons.
Example 1: Basic Procedure Conversion
Oracle
IN -> Oracle_01.sql
--Additional Params: -t JavaScript
CREATE OR REPLACE PROCEDURE PROC1
IS
BEGIN
null;
END;Snowflake
OUT -> Oracle_01.sql
CREATE OR REPLACE PROCEDURE PROC1 ()
RETURNS STRING
LANGUAGE JAVASCRIPT
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
// SnowConvert Helpers Code section is omitted.
null;
$$;Example 2: Procedure Conversion with basic statements: Declaration, Assignment, Cursor Declaration, FOR Cursor, Open, LOOP, CLOSE, IF,
Oracle
IN -> Oracle_02.sql
--Additional Params: -t JavaScript
CREATE OR REPLACE PROCEDURE PROC1
(
param1 NUMBER
)
IS
localVar1 NUMBER;
countRows NUMBER;
tempSql VARCHAR(100);
tempResult NUMBER;
CURSOR MyCursor
IS
SELECT COL1 FROM Table1;
BEGIN
localVar1 := param1;
countRows := 0;
tempSql := 'SELECT COUNT(*) FROM Table1 WHERE COL1 =' || localVar1;
FOR myCursorItem IN MyCursor
LOOP
localVar1 := myCursorItem.Col1;
countRows := countRows + 1;
END LOOP;
INSERT INTO Table2 VALUES(countRows, 'ForCursor: Total Row count is: ' || countRows);
countRows := 0;
OPEN MyCursor;
LOOP
FETCH MyCursor INTO tempResult;
EXIT WHEN MyCursor%NOTFOUND;
countRows := countRows + 1;
END LOOP;
CLOSE MyCursor;
INSERT INTO Table2 VALUES(countRows, 'LOOP: Total Row count is: ' || countRows);
EXECUTE IMMEDIATE tempSql INTO tempResult;
IF tempResult > 0 THEN
INSERT INTO Table2 (COL1, COL2) VALUES(tempResult, 'Hi, found value:' || localVar1 || ' in Table1 -- There are ' || tempResult || ' rows');
COMMIT;
END IF;
END PROC1;Snowflake
OUT -> Oracle_02.sql
--Additional Params: -t JavaScript
CREATE OR REPLACE PROCEDURE PROC1
(param1 FLOAT
)
RETURNS STRING
LANGUAGE JAVASCRIPT
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
// REGION SnowConvert Helpers Code
var formatDate = (arg) => (new Date(arg - (arg.getTimezoneOffset() * 60000))).toISOString().slice(0,-1);
var fixBind = function (arg) {
arg = arg instanceof Date ? formatDate(arg) : IS_NULL(arg) ? null : arg;
return arg;
};
var SQL = {
FOUND : false,
NOTFOUND : false,
ROWCOUNT : 0,
ISOPEN : false
};
var _RS, _ROWS, SQLERRM = "normal, successful completion", SQLCODE = 0;
var getObj = (_rs) => Object.assign(new Object(),_rs);
var getRow = (_rs) => (values = Object.values(_rs)) && (values = values.splice(-1 * _rs.getColumnCount())) && values;
var fetch = (_RS,_ROWS,fmode) => _RS.getRowCount() && _ROWS.next() && (fmode ? getObj : getRow)(_ROWS) || (fmode ? new Object() : []);
var EXEC = function (stmt,binds,opts) {
try {
binds = !(arguments[1] instanceof Array) && ((opts = arguments[1]) && []) || (binds || []);
opts = opts || new Object();
binds = binds ? binds.map(fixBind) : binds;
_RS = snowflake.createStatement({
sqlText : stmt,
binds : binds
});
_ROWS = _RS.execute();
if (opts.sql !== 0) {
var isSelect = stmt.toUpperCase().trimStart().startsWith("SELECT");
var affectedRows = isSelect ? _RS.getRowCount() : _RS.getNumRowsAffected();
SQL.FOUND = affectedRows != 0;
SQL.NOTFOUND = affectedRows == 0;
SQL.ROWCOUNT = affectedRows;
}
if (opts.row === 2) {
return _ROWS;
}
var INTO = function (opts) {
if (opts.vars == 1 && _RS.getColumnCount() == 1 && _ROWS.next()) {
return _ROWS.getColumnValue(1);
}
if (opts.rec instanceof Object && _ROWS.next()) {
var recordKeys = Object.keys(opts.rec);
Object.assign(opts.rec,Object.fromEntries(new Map(getRow(_ROWS).map((element,Index) => [recordKeys[Index],element]))))
return opts.rec;
}
return fetch(_RS,_ROWS,opts.row);
};
var BULK_INTO_COLLECTION = function (into) {
for(let i = 0;i < _RS.getRowCount();i++) {
FETCH_INTO_COLLECTIONS(into,fetch(_RS,_ROWS,opts.row));
}
return into;
};
if (_ROWS.getRowCount() > 0) {
return _ROWS.getRowCount() == 1 ? INTO(opts) : BULK_INTO_COLLECTION(opts);
}
} catch(error) {
RAISE(error.code,error.name,error.message)
}
};
var RAISE = function (code,name,message) {
message === undefined && ([name,message] = [message,name])
var error = new Error(message);
error.name = name
SQLERRM = `${(SQLCODE = (error.code = code))}: ${message}`
throw error;
};
var FETCH_INTO_COLLECTIONS = function (collections,fetchValues) {
for(let i = 0;i < collections.length;i++) {
collections[i].push(fetchValues[i]);
}
};
var IS_NULL = (arg) => !(arg || arg === 0);
var CURSOR = function (stmt,binds,isRefCursor,isOut) {
var statementObj, result_set, total_rows, ISOPEN = false, result_set_table = '', self = this, row_count, found;
this.CURRENT = new Object;
this.INTO = function () {
return self.res;
};
this.OPEN = function (openParameters) {
if (ISOPEN && !isRefCursor) RAISE(-6511,"CURSOR_ALREADY_OPEN","cursor already open");
var finalStmt = openParameters && openParameters.query || stmt;
var parameters = openParameters && openParameters.binds || [];
var finalBinds = binds instanceof Function ? binds(...parameters) : binds;
finalBinds = finalBinds || parameters;
try {
if (isOut) {
if (!temptable_prefix) {
temptable_prefix = `${procname}_TEMP_${(EXEC(`select current_session() || '_' || to_varchar(current_timestamp, 'yyyymmddhh24missss')`,{
sql : 0
}))[0]}_`;
}
if (!result_set_table) {
result_set_table = temptable_prefix + outCursorResultNumber++;
EXEC(`CREATE OR REPLACE TEMPORARY TABLE ${result_set_table} AS ${finalStmt}`,{
sql : 0
});
}
finalStmt = "SELECT * FROM " + result_set_table
}
[result_set,statementObj,total_rows] = [EXEC(finalStmt,finalBinds,{
sql : 0,
row : 2
}),_RS,_RS.getColumnCount()]
ISOPEN = true;
row_count = 0;
} catch(error) {
RAISE(error.code,"error",error.message);
}
return this;
};
this.NEXT = function () {
if (total_rows && result_set.next()) {
this.CURRENT = new Object;
for(let i = 1;i <= statementObj.getColumnCount();i++) {
(this.CURRENT)[statementObj.getColumnName(i)] = result_set.getColumnValue(i);
}
return true;
} else return false;
};
this.FETCH = function (record) {
var recordKeys = record ? Object.keys(record) : undefined;
self.res = [];
if (!ISOPEN) RAISE(-1001,"INVALID_CURSOR","invalid cursor");
if (recordKeys && recordKeys.length != statementObj.getColumnCount()) RAISE(-6504,"ROWTYPE_MISMATCH","Return types of Result Set variables or query do not match");
self.res = fetch(statementObj,result_set);
if (self.res && self.res.length > 0) {
found = true;
row_count++;
if (recordKeys) {
for(let i = 0;i < self.res.length;i++) {
record[recordKeys[i]] = (self.res)[i];
}
return false;
}
return true;
} else found = false;
return false;
};
this.CLOSE = function () {
if (!ISOPEN) RAISE(-1001,"INVALID_CURSOR","invalid cursor");
found = row_count = result_set_table = total_rows = result_set = statementObj = undefined;
ISOPEN = false;
};
this.FETCH_BULK_COLLECT_INTO = function (variables,limit) {
if (variables.length != statementObj.getColumnCount()) RAISE(-6504,"ROWTYPE_MISMATCH","Return types of Result Set variables or query do not match");
if (limit) {
for(let i = 0;i < limit && this.FETCH();i++)FETCH_INTO_COLLECTIONS(variables,self.res);
} else {
while ( this.FETCH() )
FETCH_INTO_COLLECTIONS(variables,self.res);
}
};
this.FOUND = () => ISOPEN ? typeof(found) == "boolean" ? found : null : RAISE(-1001,"INVALID_CURSOR","invalid cursor");
this.NOTFOUND = () => ISOPEN ? typeof(found) == "boolean" ? !found : null : RAISE(-1001,"INVALID_CURSOR","invalid cursor");
this.ROWCOUNT = () => ISOPEN ? row_count : RAISE(-1001,"INVALID_CURSOR","invalid cursor");
this.ISOPEN = () => ISOPEN;
this.SAVE_STATE = function () {
return {
tempTable : result_set_table,
position : row_count
};
};
this.RESTORE_STATE = function (tempTable,position) {
result_set_table = tempTable
if (result_set_table) {
isOut = true
this.OPEN();
for(let i = 0;i < position;i++)this.FETCH();
}
};
this.ROWTYPE = () => ROWTYPE(stmt,binds());
};
var outCursorResultNumber = 0;
var concatValue = (arg) => IS_NULL(arg) ? "" : arg;
// END REGION
let LOCALVAR1;
let COUNTROWS;
let TEMPSQL;
let TEMPRESULT;
let MYCURSOR = new CURSOR(`SELECT COL1 FROM
Table1`,() => []);
LOCALVAR1 = PARAM1;
COUNTROWS = 0;
TEMPSQL = `SELECT COUNT(*) FROM
Table1
WHERE COL1 =${concatValue(LOCALVAR1)}`;
MYCURSOR.OPEN();
while ( MYCURSOR.NEXT() ) {
let MYCURSORITEM = MYCURSOR.CURRENT;
LOCALVAR1 = MYCURSORITEM.COL1;
COUNTROWS = COUNTROWS + 1;
}
MYCURSOR.CLOSE();
EXEC(`INSERT INTO Table2
VALUES(?, 'ForCursor: Total Row count is: ' || NVL(? :: STRING, ''))`,[COUNTROWS,COUNTROWS]);
COUNTROWS = 0;
MYCURSOR.OPEN();
while ( true ) {
MYCURSOR.FETCH(TEMPRESULT) && ([TEMPRESULT] = MYCURSOR.INTO());
if (MYCURSOR.NOTFOUND()) {
break;
}
COUNTROWS = COUNTROWS + 1;
}
MYCURSOR.CLOSE();
EXEC(`INSERT INTO Table2
VALUES(?, 'LOOP: Total Row count is: ' || NVL(? :: STRING, ''))`,[COUNTROWS,COUNTROWS]);
[TEMPRESULT] = EXEC(TEMPSQL);
if (TEMPRESULT > 0) {
// ** SSC-EWI-0022 - ONE OR MORE IDENTIFIERS IN THIS STATEMENT WERE CONSIDERED PARAMETERS BY DEFAULT. REFERENCED TABLE NOT FOUND. **
EXEC(`INSERT INTO Table2(COL1, COL2) VALUES(?, 'Hi, found value:' || NVL(? :: STRING, '') || ' in Table1 -- There are ' || NVL(? :: STRING, '') || ' rows')`,[TEMPRESULT,LOCALVAR1,TEMPRESULT]);
EXEC(`--** SSC-FDM-OR0012 - COMMIT REQUIRES THE APPROPRIATE SETUP TO WORK AS INTENDED **
COMMIT;`);
}
$$;Call of procedures inside other procedure
Oracle
IN -> Oracle_03.sql
--Additional Params: -t JavaScript
CREATE OR REPLACE PROCEDURE PROCEDURE01(param1 NUMBER, param2 VARCHAR)
IS
BEGIN
INSERT INTO TABLE1 VALUES(param1, param2);
END;
CREATE OR REPLACE PROCEDURE PROCEDURE02(param1 NUMBER, param2 VARCHAR)
IS
BEGIN
PROCEDURE01(param1, param2);
END;Snowflake
OUT -> Oracle_03.sql
CREATE OR REPLACE PROCEDURE PROCEDURE01 (param1 FLOAT, param2 STRING)
RETURNS STRING
LANGUAGE JAVASCRIPT
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
// SnowConvert Helpers Code section is omitted.
EXEC(`INSERT INTO TABLE1
VALUES(?, ?)`,[PARAM1,PARAM2]);
$$;
CREATE OR REPLACE PROCEDURE PROCEDURE02 (param1 FLOAT, param2 STRING)
RETURNS STRING
LANGUAGE JAVASCRIPT
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
// SnowConvert Helpers Code section is omitted.
EXEC(`CALL
PROCEDURE01(?, ?)`,[PARAM1,PARAM2]);
$$;EWIs Related
SSC-EWI-0022: One or more identifiers in this statement were considered parameters by default.
SSC-FDM-OR0012: COMMIT and ROLLBACK statements require adequate setup to perform as intended.
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