patch 4.0
This commit is contained in:
wangzelin.wzl
204
src/sql/engine/expr/ob_expr_statement_digest.cpp
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204
src/sql/engine/expr/ob_expr_statement_digest.cpp
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/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_statement_digest.h"
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#include "sql/engine/ob_exec_context.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "sql/plan_cache/ob_sql_parameterization.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/expr/ob_datum_cast.h"
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#include "share/ob_encryption_util.h"
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using namespace oceanbase::common;
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using namespace oceanbase::share;
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namespace oceanbase
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{
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namespace sql
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{
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int calc_digest_text(ObIAllocator &allocator,
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const ObString sql_str,
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const ObCollationType cs_type,
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ObSQLSessionInfo *session,
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share::schema::ObSchemaGetterGuard *schema_guard,
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ObString &digest_str)
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{
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int ret = OB_SUCCESS;
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ObArenaAllocator temp_allocator(ObModIds::OB_SQL_EXPR_CALC);
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HEAP_VAR(ObExecContext, exec_ctx, temp_allocator) {
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ObPhysicalPlanCtx phy_plan_ctx(allocator);
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exec_ctx.set_physical_plan_ctx(&phy_plan_ctx);
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exec_ctx.set_my_session(session);
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ObSqlCtx sql_ctx;
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sql_ctx.session_info_ = session;
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sql_ctx.schema_guard_ = schema_guard;
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ObPlanCacheCtx pc_ctx(sql_str, false, allocator, sql_ctx, exec_ctx,
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session->get_effective_tenant_id());
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ObParser parser(allocator, session->get_sql_mode(), cs_type);
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ParseResult parse_result;
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ParamStore tmp_params((ObWrapperAllocator(allocator)));
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if (OB_FAIL(parser.parse(sql_str, parse_result))) {
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LOG_WARN("fail to parse sql str", K(sql_str), K(ret));
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} else if (OB_FAIL(ObSqlParameterization::parameterize_syntax_tree(allocator,
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true,
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pc_ctx,
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parse_result.result_tree_,
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tmp_params,
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cs_type))) {
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LOG_WARN("fail to parameterize syntax tree", K(sql_str), K(ret));
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} else {
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digest_str = pc_ctx.sql_ctx_.spm_ctx_.bl_key_.constructed_sql_;
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}
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}
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return ret;
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}
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ObExprStatementDigest::ObExprStatementDigest(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_SYS_STATEMENT_DIGEST, N_STATEMENT_DIGEST, 1)
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{
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}
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ObExprStatementDigest::~ObExprStatementDigest()
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{
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}
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int ObExprStatementDigest::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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ObExprResType tmp_type;
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type.set_varchar();
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type.set_collation_type(type_ctx.get_coll_type());
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type.set_collation_level(CS_LEVEL_COERCIBLE);
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type.set_length(OB_MAX_SQL_ID_LENGTH);
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type1.set_calc_type(ObVarcharType);
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OZ (aggregate_charsets_for_string_result(tmp_type, &type1, 1, type_ctx.get_coll_type()));
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OX (type1.set_calc_collation_type(tmp_type.get_collation_type()));
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OX (type1.set_calc_collation_level(tmp_type.get_collation_level()));
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return ret;
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}
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int ObExprStatementDigest::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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rt_expr.eval_func_ = &ObExprStatementDigest::eval_statement_digest;
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return ret;
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}
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int ObExprStatementDigest::eval_statement_digest(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *arg = NULL;
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ObSQLSessionInfo *session = NULL;
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share::schema::ObSchemaGetterGuard *schema_guard = NULL;
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if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session()) ||
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OB_ISNULL(ctx.exec_ctx_.get_sql_ctx()) ||
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OB_ISNULL(schema_guard = ctx.exec_ctx_.get_sql_ctx()->schema_guard_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected null", K(ret));
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} else if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
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LOG_WARN("evaluate parameter value failed", K(ret));
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} else if (arg->is_null()) {
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expr_datum.set_null();
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} else{
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ObExprStrResAlloc res_alloc(expr, ctx);
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ObString sql_str = arg->get_string();
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ObString digest_str;
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ObString hash_str;
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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ObIAllocator &calc_alloc = alloc_guard.get_allocator();
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char *buf = NULL;
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if (OB_FAIL(calc_digest_text(calc_alloc, sql_str, expr.args_[0]->datum_meta_.cs_type_,
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session, schema_guard, digest_str))) {
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LOG_WARN("fail to calc statement digest text", K(sql_str), K(ret));
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} else if (OB_FAIL(ObHashUtil::hash(OB_HASH_MD5, digest_str, calc_alloc, hash_str))) {
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LOG_WARN("fail to calc md5", K(digest_str), K(ret));
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} else if (OB_FAIL(ObDatumHexUtils::hex(expr, hash_str, ctx, calc_alloc, expr_datum))) {
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LOG_WARN("fail to convert hash_str to hex", K(ret));
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}
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}
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return ret;
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}
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ObExprStatementDigestText::ObExprStatementDigestText(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_SYS_STATEMENT_DIGEST_TEXT, N_STATEMENT_DIGEST_TEXT, 1)
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{
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}
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ObExprStatementDigestText::~ObExprStatementDigestText()
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{
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}
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int ObExprStatementDigestText::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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type.set_clob();
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type1.set_calc_type(ObVarcharType);
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OZ (aggregate_charsets_for_string_result(type, &type1, 1, type_ctx.get_coll_type()));
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OX (type1.set_calc_collation_type(type.get_collation_type()));
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OX (type1.set_calc_collation_level(type.get_collation_level()));
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type.set_length(OB_MAX_MYSQL_VARCHAR_LENGTH);
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return ret;
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}
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int ObExprStatementDigestText::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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rt_expr.eval_func_ = &ObExprStatementDigestText::eval_statement_digest_text;
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return ret;
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}
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int ObExprStatementDigestText::eval_statement_digest_text(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *arg = NULL;
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ObSQLSessionInfo *session = NULL;
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share::schema::ObSchemaGetterGuard *schema_guard = NULL;
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if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session()) ||
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OB_ISNULL(ctx.exec_ctx_.get_sql_ctx()) ||
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OB_ISNULL(schema_guard = ctx.exec_ctx_.get_sql_ctx()->schema_guard_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected null", K(ret));
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} else if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
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LOG_WARN("evaluate parameter value failed", K(ret));
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} else if (arg->is_null()) {
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expr_datum.set_null();
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} else{
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ObExprStrResAlloc res_alloc(expr, ctx);
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ObString sql_str = arg->get_string();
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ObString digest_str;
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ObString res_str;
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const ObCollationType in_cs_type = expr.args_[0]->datum_meta_.cs_type_;
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const ObCollationType res_cs_type = expr.datum_meta_.cs_type_;
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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ObIAllocator &calc_alloc = alloc_guard.get_allocator();
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if (OB_FAIL(calc_digest_text(calc_alloc, sql_str, in_cs_type, session,
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schema_guard, digest_str))) {
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LOG_WARN("fail to calc statement digest text", K(sql_str), K(ret));
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} else if (OB_FAIL(ObSQLUtils::copy_and_convert_string_charset(res_alloc, digest_str, res_str,
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in_cs_type, res_cs_type))) {
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LOG_WARN("fail to check need_convert_string_collation", K(ret));
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} else {
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expr_datum.set_string(res_str);
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}
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}
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return ret;
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}
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}
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}
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