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package redshift;
import gudusoft.gsqlparser.*;
import gudusoft.gsqlparser.nodes.TExpression;
import gudusoft.gsqlparser.nodes.TParameterDeclaration;
import gudusoft.gsqlparser.stmt.TCreateFunctionStmt;
import gudusoft.gsqlparser.stmt.TSelectSqlStatement;
import junit.framework.TestCase;
public class TestCreateFunction extends TestCase {
public void test1(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvredshift);
sqlparser.sqltext = "create function f_sql_greater (float, float)\n" +
" returns float\n" +
"stable\n" +
"as $$\n" +
" select case when $1 > $2 then $1\n" +
" else $2\n" +
" end\n" +
"$$ language sql";
assertTrue(sqlparser.parse() == 0);
TCustomSqlStatement sqlStatement = sqlparser.sqlstatements.get(0);
assertTrue(sqlStatement.sqlstatementtype == ESqlStatementType.sstcreatefunction);
TCreateFunctionStmt createFunction = (TCreateFunctionStmt)sqlStatement;
assertTrue(createFunction.getFunctionName().toString().equalsIgnoreCase("f_sql_greater"));
assertTrue(createFunction.getParameterDeclarations().size() == 2);
TParameterDeclaration parameterDeclaration = createFunction.getParameterDeclarations().getParameterDeclarationItem(0);
assertTrue(parameterDeclaration.getDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getReturnDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getRoutineLanguage().equalsIgnoreCase("sql"));
assertTrue(createFunction.getBodyStatements().size() == 1);
assertTrue(createFunction.getBodyStatements().get(0).sqlstatementtype == ESqlStatementType.sstselect);
TSelectSqlStatement selectSqlStatement = (TSelectSqlStatement)createFunction.getBodyStatements().get(0);
TExpression expression = selectSqlStatement.getResultColumnList().getResultColumn(0).getExpr();
assertTrue(expression.getExpressionType() == EExpressionType.case_t);
}
public void test2(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvredshift);
sqlparser.sqltext = "create function f_sql_commission (float, float )\n" +
" returns float\n" +
"stable\n" +
"as $$\n" +
" select f_sql_greater ($1, $2) \n" +
"$$ language sql;";
assertTrue(sqlparser.parse() == 0);
TCustomSqlStatement sqlStatement = sqlparser.sqlstatements.get(0);
assertTrue(sqlStatement.sqlstatementtype == ESqlStatementType.sstcreatefunction);
TCreateFunctionStmt createFunction = (TCreateFunctionStmt)sqlStatement;
assertTrue(createFunction.getFunctionName().toString().equalsIgnoreCase("f_sql_commission"));
assertTrue(createFunction.getParameterDeclarations().size() == 2);
TParameterDeclaration parameterDeclaration = createFunction.getParameterDeclarations().getParameterDeclarationItem(0);
assertTrue(parameterDeclaration.getDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getReturnDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getRoutineLanguage().equalsIgnoreCase("sql"));
assertTrue(createFunction.getBodyStatements().size() == 1);
assertTrue(createFunction.getBodyStatements().get(0).sqlstatementtype == ESqlStatementType.sstselect);
TSelectSqlStatement selectSqlStatement = (TSelectSqlStatement)createFunction.getBodyStatements().get(0);
TExpression expression = selectSqlStatement.getResultColumnList().getResultColumn(0).getExpr();
assertTrue(expression.getExpressionType() == EExpressionType.function_t);
}
public void testPython(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvredshift);
sqlparser.sqltext = "create function f_py_greater (a float, b float)\n" +
" returns float\n" +
"stable\n" +
"as $$\n" +
" if a > b:\n" +
" return a\n" +
" return b\n" +
"$$ language plpythonu;";
assertTrue(sqlparser.parse() == 0);
TCustomSqlStatement sqlStatement = sqlparser.sqlstatements.get(0);
assertTrue(sqlStatement.sqlstatementtype == ESqlStatementType.sstcreatefunction);
TCreateFunctionStmt createFunction = (TCreateFunctionStmt)sqlStatement;
assertTrue(createFunction.getFunctionName().toString().equalsIgnoreCase("f_py_greater"));
assertTrue(createFunction.getParameterDeclarations().size() == 2);
TParameterDeclaration parameterDeclaration = createFunction.getParameterDeclarations().getParameterDeclarationItem(0);
assertTrue(parameterDeclaration.getParameterName().toString().equalsIgnoreCase("a"));
assertTrue(parameterDeclaration.getDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getReturnDataType().getDataType() == EDataType.float_t);
assertTrue(createFunction.getRoutineLanguage().equalsIgnoreCase("plpythonu"));
}
}