5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
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7 // Permission is hereby granted, free of charge, to any person obtaining a copy
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8 // of this software and associated documentation files (the "Software"), to deal
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9 // in the Software without restriction, including without limitation the rights
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10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 // copies of the Software, and to permit persons to whom the Software is
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12 // furnished to do so, subject to the following conditions:
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14 // The above copyright notice and this permission notice shall be included in
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15 // all copies or substantial portions of the Software.
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17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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28 using System.Collections.Generic;
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30 using DbLinq.Data.Linq.Sql;
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31 using DbLinq.Vendor.Implementation;
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33 namespace DbLinq.Ingres
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38 class IngresSqlProvider : SqlProvider
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40 public override SqlStatement GetInsertIds(SqlStatement table, IList<SqlStatement> autoPKColumn, IList<SqlStatement> inputPKColumns, IList<SqlStatement> inputPKValues, IList<SqlStatement> outputColumns, IList<SqlStatement> outputParameters, IList<SqlStatement> outputExpressions)
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42 // no parameters? no need to get them back
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43 if (outputParameters.Count == 0)
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45 // otherwise we keep track of the new values
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46 return SqlStatement.Format("SELECT {0}",
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47 SqlStatement.Join(", ", (from outputExpression in outputExpressions
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48 select outputExpression.Replace("next value", "current value", true)).ToArray())
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52 public override string GetTableAlias (string nameBase)
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54 return nameBase + "$";
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57 public override SqlStatement GetLiteral (bool literal)
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59 return literal == true ? "'Y'" : "'N'";
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63 protected override SqlStatement GetLiteralCount(SqlStatement a)
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68 protected override SqlStatement GetLiteralStringToLower(SqlStatement a)
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70 return string.Format("LOWER({0})", a);
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73 protected override SqlStatement GetLiteralStringToUpper(SqlStatement a)
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75 return string.Format("UPPER({0})", a);
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78 public override SqlStatement GetLiteralLimit(SqlStatement select, SqlStatement limit)
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80 // return string.Format("SELECT FIRST {0} FROM ({1})", limit, select);
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81 var trimSelect = "SELECT ";
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82 if (select.Count > 0 && select[0].Sql.StartsWith(trimSelect))
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84 var selectBuilder = new SqlStatementBuilder(select);
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85 var remaining = select[0].Sql.Substring(trimSelect.Length);
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86 selectBuilder.Parts[0] = new SqlLiteralPart(remaining);
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87 return SqlStatement.Format("SELECT FIRST {0} {1}", limit, selectBuilder.ToSqlStatement());
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89 throw new ArgumentException("Invalid SELECT format");
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92 public override SqlStatement GetLiteralLimit(SqlStatement select, SqlStatement limit, SqlStatement offset, SqlStatement offsetAndLimit)
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94 // Ingres 9.2 and above support offset clauses now
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95 return SqlStatement.Format("{0} OFFSET {1}", GetLiteralLimit(select, limit), offset);
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98 public override string GetParameterName(string nameBase)
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100 return (":" + nameBase).ToLower();
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103 protected override bool IsNameCaseSafe(string dbName)
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105 return dbName == dbName.ToLower();
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108 protected override SqlStatement GetLiteralStringConcat(SqlStatement a, SqlStatement b)
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110 // This needs to be bracketed in case subsequent functions are called upon it
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111 return SqlStatement.Format("({0} || {1})", a, b);
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