5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
\r
7 // Permission is hereby granted, free of charge, to any person obtaining a copy
\r
8 // of this software and associated documentation files (the "Software"), to deal
\r
9 // in the Software without restriction, including without limitation the rights
\r
10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
\r
11 // copies of the Software, and to permit persons to whom the Software is
\r
12 // furnished to do so, subject to the following conditions:
\r
14 // The above copyright notice and this permission notice shall be included in
\r
15 // all copies or substantial portions of the Software.
\r
17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
\r
18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
\r
19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
\r
20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
\r
21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
\r
22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
\r
27 using System.Collections.Generic;
\r
31 using System.Data.Linq.Sql;
\r
33 using DbLinq.Data.Linq.Sql;
\r
36 using DbLinq.Vendor.Implementation;
\r
38 namespace DbLinq.Oracle
\r
45 class OracleSqlProvider : SqlProvider
\r
47 //public override string GetInsert(string table, IList<string> inputColumns, IList<string> inputValues)
\r
49 // return "BEGIN " + base.GetInsert(table, inputColumns, inputValues);
\r
52 public override SqlStatement GetInsertIds(IList<SqlStatement> outputParameters, IList<SqlStatement> outputExpressions)
\r
54 // no parameters? no need to get them back
\r
55 if (outputParameters.Count == 0)
\r
57 // otherwise we keep track of the new values
\r
58 return SqlStatement.Format("SELECT {0} INTO {1} FROM DUAL",
\r
59 SqlStatement.Join(", ", (from outputExpression in outputExpressions select outputExpression.Replace(".NextVal", ".CurrVal", true)).ToArray()),
\r
60 SqlStatement.Join(", ", outputParameters.ToArray()));
\r
63 protected override SqlStatement GetLiteralModulo(SqlStatement a, SqlStatement b)
\r
65 return string.Format("MOD({0}, {1})", a, b);
\r
68 protected override SqlStatement GetLiteralCount(SqlStatement a)
\r
73 protected override SqlStatement GetLiteralStringLength(SqlStatement a)
\r
75 return SqlStatement.Format("LENGTH({0})", a);
\r
78 protected override SqlStatement GetLiteralStringToLower(SqlStatement a)
\r
80 return SqlStatement.Format("LOWER({0})", a);
\r
83 protected override SqlStatement GetLiteralStringToUpper(SqlStatement a)
\r
85 return SqlStatement.Format("UPPER({0})", a);
\r
89 // SELECT a.*, rownum RN FROM (
\r
90 // select c$.CustomerID, c$.CompanyName from [Customers] c$ order by c$.CUSTOMERID
\r
91 // ) a WHERE rownum <=5
\r
94 protected const string LimitedTableName = "LimitedTable___";
\r
95 protected const string LimitedRownum = "Limit___";
\r
97 public override SqlStatement GetLiteralLimit(SqlStatement select, SqlStatement limit)
\r
99 return SqlStatement.Format(
\r
100 @"SELECT {2}.*, rownum {3} FROM ({4}{0}{4}) {2} WHERE rownum <= {1}",
\r
101 select, limit, LimitedTableName, LimitedRownum, NewLine);
\r
104 public override SqlStatement GetLiteralLimit(SqlStatement select, SqlStatement limit, SqlStatement offset, SqlStatement offsetAndLimit)
\r
106 return SqlStatement.Format(
\r
107 @"SELECT * FROM ({3}{0}{3}) WHERE {2} > {1}",
\r
108 GetLiteralLimit(select, offsetAndLimit), offset, LimitedRownum, NewLine);
\r
111 protected override SqlStatement GetLiteralStringIndexOf(SqlStatement baseString, SqlStatement searchString, SqlStatement startIndex, SqlStatement count)
\r
113 // SUBSTR(baseString, StartIndex)
\r
114 var substring = GetLiteralSubString(baseString, startIndex, count);
\r
116 // INSTR(SUBSTR(baseString, StartIndex), searchString) ---> range 1:n , 0 => doesn't exist
\r
117 return SqlStatement.Format("INSTR({0},{1})", substring, searchString);
\r
120 protected override SqlStatement GetLiteralStringIndexOf(SqlStatement baseString, SqlStatement searchString, SqlStatement startIndex)
\r
122 // SUBSTR(baseString,StartIndex)
\r
123 var substring = GetLiteralSubString(baseString, startIndex);
\r
125 // INSTR(SUBSTR(baseString, StartIndex), searchString) ---> range 1:n , 0 => doesn't exist
\r
126 return SqlStatement.Format("INSTR({0},{1})", substring, searchString);
\r
129 protected override SqlStatement GetLiteralStringIndexOf(SqlStatement baseString, SqlStatement searchString)
\r
131 return GetLiteralSubtract(SqlStatement.Format("INSTR({0},{1})", baseString, searchString), "1");
\r