Exec_comp_op.cpp
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上传日期:2022-05-23
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文件大小:14k
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #include <NdbScanFilter.hpp>
- #include <NdbSqlUtil.hpp>
- #include <codegen/Code_comp_op.hpp>
- void
- Exec_comp_op::execInterp(Ctx& ctx, Ctl& ctl)
- {
- const Code& code = getCode();
- const unsigned arity = code.m_op.arity();
- const Comp_op::Opcode opcode = code.m_op.m_opcode;
- Data& data = getData();
- ctx_assert(ctl.m_scanFilter != 0);
- NdbScanFilter& scanFilter = *ctl.m_scanFilter;
- if (code.m_interpColumn == 0) {
- // args are constant on this level so evaluate entire predicate
- evaluate(ctx, ctl);
- if (! ctx.ok())
- return;
- if (data.m_value == Pred_value_true)
- scanFilter.istrue();
- else
- scanFilter.isfalse();
- return;
- }
- const NdbAttrId interpAttrId = code.m_interpAttrId;
- if (arity == 1) {
- ctx_assert(m_expr[1] != 0);
- const SqlType& t1 = m_expr[1]->getCode().sqlSpec().sqlType();
- const SqlField& f1 = m_expr[1]->getData().sqlField();
- switch (code.m_op.m_opcode) {
- case Comp_op::Isnull:
- scanFilter.isnull(interpAttrId);
- break;
- case Comp_op::Isnotnull:
- scanFilter.isnotnull(interpAttrId);
- break;
- default:
- ctx_assert(false);
- break;
- }
- } else if (arity == 2) {
- ctx_assert(m_expr[1] != 0 && m_expr[2] != 0);
- // one is column and the other is constant at this level
- ctx_assert(code.m_interpColumn == 1 || code.m_interpColumn == 2);
- const unsigned i = code.m_interpColumn;
- const unsigned j = 3 - i;
- // evaluate the constant
- m_expr[j]->evaluate(ctx, ctl);
- if (! ctx.ok())
- return;
- const SqlType& t1 = m_expr[i]->getCode().sqlSpec().sqlType();
- const SqlField& f1 = m_expr[i]->getData().sqlField();
- const SqlType& t2 = m_expr[j]->getCode().sqlSpec().sqlType();
- const SqlField& f2 = m_expr[j]->getData().sqlField();
- // handle null constant
- if (f2.sqlNull()) {
- scanFilter.isfalse();
- return;
- }
- // handle null in interpreter
- scanFilter.begin(NdbScanFilter::AND);
- scanFilter.isnotnull(interpAttrId);
- if (t1.type() == SqlType::Char || t1.type() == SqlType::Varchar) {
- const char* v2 = 0;
- unsigned n2 = 0;
- bool nopad = false;
- if (t1.type() == SqlType::Char && t2.type() == SqlType::Char) {
- v2 = reinterpret_cast<const char*>(f2.sqlChar());
- n2 = t2.length();
- nopad = false;
- } else if (t1.type() == SqlType::Char && t2.type() == SqlType::Varchar) {
- v2 = reinterpret_cast<const char*>(f2.sqlVarchar(&n2));
- nopad = true;
- } else if (t1.type() == SqlType::Varchar && t2.type() == SqlType::Char) {
- v2 = reinterpret_cast<const char*>(f2.sqlChar());
- n2 = t2.length();
- nopad = true;
- } else if (t1.type() == SqlType::Varchar && t2.type() == SqlType::Varchar) {
- v2 = reinterpret_cast<const char*>(f2.sqlVarchar(&n2));
- nopad = true;
- } else {
- ctx_assert(false);
- }
- switch (opcode) {
- case Comp_op::Eq:
- scanFilter.eq(interpAttrId, v2, n2, nopad);
- break;
- case Comp_op::Noteq:
- scanFilter.ne(interpAttrId, v2, n2, nopad);
- break;
- case Comp_op::Lt:
- if (i == 1) {
- scanFilter.lt(interpAttrId, v2, n2, nopad);
- } else {
- scanFilter.gt(interpAttrId, v2, n2, nopad);
- }
- break;
- case Comp_op::Lteq:
- if (i == 1) {
- scanFilter.le(interpAttrId, v2, n2, nopad);
- } else {
- scanFilter.ge(interpAttrId, v2, n2, nopad);
- }
- break;
- case Comp_op::Gt:
- if (i == 1) {
- scanFilter.gt(interpAttrId, v2, n2, nopad);
- } else {
- scanFilter.lt(interpAttrId, v2, n2, nopad);
- }
- break;
- case Comp_op::Gteq:
- if (i == 1) {
- scanFilter.ge(interpAttrId, v2, n2, nopad);
- } else {
- scanFilter.le(interpAttrId, v2, n2, nopad);
- }
- break;
- case Comp_op::Like:
- scanFilter.like(interpAttrId, v2, n2, nopad);
- break;
- case Comp_op::Notlike:
- scanFilter.notlike(interpAttrId, v2, n2, nopad);
- break;
- default:
- ctx_assert(false);
- break;
- }
- } else if (t1.type() == SqlType::Smallint || t1.type() == SqlType::Integer || t1.type() == SqlType::Bigint) {
- ctx_assert(t1.unSigned());
- bool s2 = ! t2.unSigned();
- SqlBigint v2;
- SqlUbigint uv2;
- if (s2) {
- v2 =
- t2.type() == SqlType::Smallint ? f2.sqlSmallint() :
- t2.type() == SqlType::Integer ? f2.sqlInteger() : f2.sqlBigint();
- uv2 = v2;
- } else {
- uv2 =
- t2.type() == SqlType::Smallint ? (SqlUsmallint)f2.sqlSmallint() :
- t2.type() == SqlType::Integer ? (SqlUinteger)f2.sqlInteger() : (SqlUbigint)f2.sqlBigint();
- v2 = uv2;
- }
- switch (code.m_op.m_opcode) {
- case Comp_op::Eq:
- if (s2 && v2 < 0)
- scanFilter.isfalse();
- else
- scanFilter.eq(interpAttrId, uv2);
- break;
- case Comp_op::Noteq:
- if (s2 && v2 < 0)
- scanFilter.istrue();
- else
- scanFilter.ne(interpAttrId, uv2);
- break;
- case Comp_op::Lt:
- if (i == 1) {
- if (s2 && v2 < 0)
- scanFilter.isfalse();
- else
- scanFilter.lt(interpAttrId, uv2);
- } else {
- if (s2 && v2 < 0)
- scanFilter.istrue();
- else
- scanFilter.gt(interpAttrId, uv2);
- }
- break;
- case Comp_op::Lteq:
- if (i == 1) {
- if (s2 && v2 < 0)
- scanFilter.isfalse();
- else
- scanFilter.le(interpAttrId, uv2);
- } else {
- if (s2 && v2 < 0)
- scanFilter.istrue();
- else
- scanFilter.ge(interpAttrId, uv2);
- }
- break;
- case Comp_op::Gt:
- if (i == 1) {
- if (s2 && v2 < 0)
- scanFilter.istrue();
- else
- scanFilter.gt(interpAttrId, uv2);
- } else {
- if (s2 && v2 < 0)
- scanFilter.isfalse();
- else
- scanFilter.lt(interpAttrId, uv2);
- }
- break;
- case Comp_op::Gteq:
- if (i == 1) {
- if (s2 && v2 < 0)
- scanFilter.istrue();
- else
- scanFilter.ge(interpAttrId, uv2);
- } else {
- if (s2 && v2 < 0)
- scanFilter.isfalse();
- else
- scanFilter.le(interpAttrId, uv2);
- }
- break;
- default:
- ctx_assert(false);
- break;
- }
- } else {
- ctx_assert(false);
- }
- // end null guard
- scanFilter.end();
- } else {
- ctx_assert(false);
- }
- }
- static bool
- do_sqlchar_comp(Comp_op::Opcode opcode, const SqlChar* s1, unsigned n1, const SqlChar* s2, unsigned n2, bool padded)
- {
- int ret = NdbSqlUtil::char_compare(reinterpret_cast<const char*>(s1), n1, reinterpret_cast<const char *>(s2), n2, padded);
- switch (opcode) {
- case Comp_op::Eq:
- return ret == 0;
- case Comp_op::Noteq:
- return ret != 0;
- case Comp_op::Lt:
- return ret < 0;
- case Comp_op::Lteq:
- return ret <= 0;
- case Comp_op::Gt:
- return ret > 0;
- case Comp_op::Gteq:
- return ret >= 0;
- default:
- break;
- }
- ctx_assert(false);
- return false;
- }
- static bool
- do_sqlchar_like(const SqlChar* s1, unsigned n1, const SqlChar* s2, unsigned n2, bool padded)
- {
- bool ret = NdbSqlUtil::char_like(reinterpret_cast<const char*>(s1), n1, reinterpret_cast<const char *>(s2), n2, padded);
- return ret;
- }
- static bool
- do_datetime_comp(Comp_op::Opcode opcode, SqlDatetime v1, SqlDatetime v2)
- {
- int k = v1.less(v2) ? -1 : v2.less(v1) ? 1 : 0;
- switch (opcode) {
- case Comp_op::Eq:
- return k == 0;
- case Comp_op::Noteq:
- return k != 0;
- case Comp_op::Lt:
- return k < 0;
- case Comp_op::Lteq:
- return k <= 0;
- case Comp_op::Gt:
- return k > 0;
- case Comp_op::Gteq:
- return k >= 0;
- default:
- break;
- }
- ctx_assert(false);
- return false;
- }
- void
- Exec_comp_op::evaluate(Ctx& ctx, Ctl& ctl)
- {
- const Code& code = getCode();
- const unsigned arity = code.m_op.arity();
- const Comp_op::Opcode opcode = code.m_op.m_opcode;
- Data& data = getData();
- Pred_value v = Pred_value_unknown;
- if (arity == 1) {
- // evaluate sub-expression
- ctx_assert(m_expr[1] != 0);
- m_expr[1]->evaluate(ctx, ctl);
- if (! ctx.ok())
- return;
- if (ctl.m_postEval)
- return;
- // get type and value
- const SqlType& t1 = m_expr[1]->getCode().sqlSpec().sqlType();
- const SqlField& f1 = ctl.m_groupIndex == 0 ? m_expr[1]->getData().sqlField() : m_expr[1]->getData().groupField(ctl.m_groupIndex);
- switch (code.m_op.m_opcode) {
- case Comp_op::Isnull:
- v = f1.sqlNull() ? Pred_value_true : Pred_value_false;
- break;
- case Comp_op::Isnotnull:
- v = f1.sqlNull() ? Pred_value_false : Pred_value_true;
- break;
- default:
- ctx_assert(false);
- break;
- }
- } else if (arity == 2) {
- // evaluate sub-expressions
- ctx_assert(m_expr[1] != 0 && m_expr[2] != 0);
- m_expr[1]->evaluate(ctx, ctl);
- if (! ctx.ok())
- return;
- m_expr[2]->evaluate(ctx, ctl);
- if (! ctx.ok())
- return;
- if (ctl.m_postEval)
- return;
- // get types and values
- const SqlType& t1 = m_expr[1]->getCode().sqlSpec().sqlType();
- const SqlType& t2 = m_expr[2]->getCode().sqlSpec().sqlType();
- const SqlField& f1 = ctl.m_groupIndex == 0 ? m_expr[1]->getData().sqlField() : m_expr[1]->getData().groupField(ctl.m_groupIndex);
- const SqlField& f2 = ctl.m_groupIndex == 0 ? m_expr[2]->getData().sqlField() : m_expr[2]->getData().groupField(ctl.m_groupIndex);
- // handle null
- if (f1.sqlNull() || f2.sqlNull()) {
- v = Pred_value_unknown;
- } else if (t1.type() == SqlType::Char) {
- const SqlChar* v1 = f1.sqlChar();
- unsigned n1 = t1.length();
- if (t2.type() == SqlType::Char) {
- unsigned n2 = t2.length();
- const SqlChar* v2 = f2.sqlChar();
- bool b;
- switch (opcode) {
- case Comp_op::Like:
- b = do_sqlchar_like(v1, n1, v2, n2, true);
- break;
- case Comp_op::Notlike:
- b = ! do_sqlchar_like(v1, n1, v2, n2, true);
- break;
- default:
- b = do_sqlchar_comp(opcode, v1, n1, v2, n2, true);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else if (t2.type() == SqlType::Varchar) {
- unsigned n2 = 0;
- const SqlChar* v2 = f2.sqlVarchar(&n2);
- bool b;
- switch (opcode) {
- case Comp_op::Like:
- b = do_sqlchar_like(v1, n1, v2, n2, true);
- break;
- case Comp_op::Notlike:
- b = ! do_sqlchar_like(v1, n1, v2, n2, true);
- break;
- default:
- b = do_sqlchar_comp(opcode, v1, n1, v2, n2, false);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else {
- ctx_assert(false);
- }
- } else if (t1.type() == SqlType::Varchar) {
- unsigned n1 = 0;
- const SqlChar* v1 = f1.sqlVarchar(&n1);
- if (t2.type() == SqlType::Char) {
- unsigned n2 = t2.length();
- const SqlChar* v2 = f2.sqlChar();
- bool b;
- switch (opcode) {
- case Comp_op::Like:
- b = do_sqlchar_like(v1, n1, v2, n2, false);
- break;
- case Comp_op::Notlike:
- b = ! do_sqlchar_like(v1, n1, v2, n2, false);
- break;
- default:
- b = do_sqlchar_comp(opcode, v1, n1, v2, n2, false);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else if (t2.type() == SqlType::Varchar) {
- unsigned n2 = 0;
- const SqlChar* v2 = f2.sqlVarchar(&n2);
- bool b;
- switch (opcode) {
- case Comp_op::Like:
- b = do_sqlchar_like(v1, n1, v2, n2, false);
- break;
- case Comp_op::Notlike:
- b = ! do_sqlchar_like(v1, n1, v2, n2, false);
- break;
- default:
- b = do_sqlchar_comp(opcode, v1, n1, v2, n2, false);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else {
- ctx_assert(false);
- }
- } else if (t1.type() == SqlType::Smallint || t1.type() == SqlType::Integer || t1.type() == SqlType::Bigint) {
- // convert to bigint
- bool s1 = ! t1.unSigned();
- bool s2 = ! t2.unSigned();
- SqlBigint v1, v2;
- SqlUbigint uv1, uv2;
- if (s1) {
- v1 =
- t1.type() == SqlType::Smallint ? f1.sqlSmallint() :
- t1.type() == SqlType::Integer ? f1.sqlInteger() : f1.sqlBigint();
- uv1 = v1;
- } else {
- uv1 =
- t1.type() == SqlType::Smallint ? (SqlUsmallint)f1.sqlSmallint() :
- t1.type() == SqlType::Integer ? (SqlUinteger)f1.sqlInteger() : (SqlUbigint)f1.sqlBigint();
- v1 = uv1;
- }
- if (s2) {
- v2 =
- t2.type() == SqlType::Smallint ? f2.sqlSmallint() :
- t2.type() == SqlType::Integer ? f2.sqlInteger() : f2.sqlBigint();
- uv2 = v2;
- } else {
- uv2 =
- t2.type() == SqlType::Smallint ? (SqlUsmallint)f2.sqlSmallint() :
- t2.type() == SqlType::Integer ? (SqlUinteger)f2.sqlInteger() : (SqlUbigint)f2.sqlBigint();
- v2 = uv2;
- }
- bool b;
- switch (opcode) {
- case Comp_op::Eq:
- b = s1 && s2 ? (v1 == v2) : s1 ? (v1 < 0 ? false : uv1 == uv2) : s2 ? (v2 < 0 ? false : uv1 == uv2) : (uv1 == uv2);
- break;
- case Comp_op::Noteq:
- b = s1 && s2 ? (v1 == v2) : s1 ? (v1 < 0 ? true : uv1 != uv2) : s2 ? (v2 < 0 ? true : uv1 != uv2) : (uv1 != uv2);
- break;
- case Comp_op::Lt:
- b = s1 && s2 ? (v1 < v2) : s1 ? (v1 < 0 ? true : uv1 < uv2) : s2 ? (v2 < 0 ? false : uv1 < uv2) : (uv1 < uv2);
- break;
- case Comp_op::Lteq:
- b = s1 && s2 ? (v1 <= v2) : s1 ? (v1 < 0 ? true : uv1 <= uv2) : s2 ? (v2 < 0 ? false : uv1 <= uv2) : (uv1 <= uv2);
- break;
- case Comp_op::Gt:
- b = s1 && s2 ? (v1 > v2) : s1 ? (v1 < 0 ? false : uv1 > uv2) : s2 ? (v2 < 0 ? true : uv1 > uv2) : (uv1 > uv2);
- break;
- case Comp_op::Gteq:
- b = s1 && s2 ? (v1 >= v2) : s1 ? (v1 < 0 ? false : uv1 >= uv2) : s2 ? (v2 < 0 ? true : uv1 >= uv2) : (uv1 >= uv2);
- break;
- default:
- ctx_assert(false);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else if (t1.type() == SqlType::Double) {
- SqlDouble v1 = f1.sqlDouble();
- SqlDouble v2 = f2.sqlDouble();
- bool b;
- switch (opcode) {
- case Comp_op::Eq:
- b = (v1 == v2);
- break;
- case Comp_op::Noteq:
- b = (v1 != v2);
- break;
- case Comp_op::Lt:
- b = (v1 < v2);
- break;
- case Comp_op::Lteq:
- b = (v1 <= v2);
- break;
- case Comp_op::Gt:
- b = (v1 > v2);
- break;
- case Comp_op::Gteq:
- b = (v1 >= v2);
- break;
- default:
- ctx_assert(false);
- break;
- }
- v = b ? Pred_value_true : Pred_value_false;
- } else if (t1.type() == SqlType::Datetime) {
- SqlDatetime v1 = f1.sqlDatetime();
- SqlDatetime v2 = f2.sqlDatetime();
- bool b;
- b = do_datetime_comp(opcode, v1, v2);
- v = b ? Pred_value_true : Pred_value_false;
- } else {
- ctx_assert(false);
- }
- } else {
- ctx_assert(false);
- }
- // set result
- if (ctl.m_groupIndex == 0)
- data.m_value = v;
- else
- data.groupValue(ctl.m_groupIndex, ctl.m_groupInit) = v;
- }