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[CP] rewrite ora_decode which has const result to const result.

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This commit is contained in:
jingtaoye35
2023-06-06 07:48:24 +00:00
committed by ob-robot
parent 82b923c9db
commit b9dc170c63
6 changed files with 287 additions and 3 deletions
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29
src/sql/resolver/expr/ob_raw_expr_util.cpp
View File

@ -6421,6 +6421,35 @@ int ObRawExprUtils::build_const_bool_expr(ObRawExprFactory *expr_factory, ObRawE
return ret;
}
int ObRawExprUtils::build_ora_decode_expr(ObRawExprFactory *expr_factory,
const ObSQLSessionInfo &session_info,
ObRawExpr *&expr,
ObIArray<ObRawExpr *> &params_exprs)
{
int ret = OB_SUCCESS;
expr = NULL;
ObSysFunRawExpr *ora_decode = NULL;
if (OB_ISNULL(expr_factory) || params_exprs.count() < 3) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected params", K(ret), KP(expr_factory), K(params_exprs.count()));
} else if (OB_FAIL(expr_factory->create_raw_expr(T_FUN_SYS_ORA_DECODE, ora_decode))) {
LOG_WARN("failed to create raw expr", K(ret));
} else if (OB_ISNULL(ora_decode)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("new expr is NULL", K(ret), KP(ora_decode));
} else if (OB_FAIL(append(ora_decode->get_param_exprs(), params_exprs))) {
LOG_WARN("failed to append into ora_decode param exprs", K(ret));
} else {
ora_decode->set_func_name(ObString::make_string(N_ORA_DECODE));
if (OB_FAIL(ora_decode->formalize(&session_info))) {
LOG_WARN("failed to formalize ora_decode", K(ret));
} else {
expr = ora_decode;
}
}
return ret;
}
int ObRawExprUtils::check_composite_cast(ObRawExpr *&expr, ObSchemaChecker &schema_checker)
{
int ret = OB_SUCCESS;

4
src/sql/resolver/expr/ob_raw_expr_util.h
View File

@ -738,6 +738,10 @@ public:
ObItemType type,
ObRawExpr *param_expr,
ObRawExpr *&exists_expr);
static int build_ora_decode_expr(ObRawExprFactory *expr_factory,
const ObSQLSessionInfo &session_info,
ObRawExpr *&expr,
ObIArray<ObRawExpr *> &param_exprs);
template <typename T>
static bool find_expr(const common::ObIArray<T> &exprs, const ObRawExpr* expr);
template <typename T>