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GeezerVison is showing github.com — sqlparser/dependency/sqltypes/bind_variables.go at master · CovenantSQL/sqlparser Expand file tree/ Copy pathbind_variables.goMore file actions 266 lines (240 loc) · 7.46 KB / Copy pathbind_variables.goFile metadata and controls266 lines (240 loc) · 7.46 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 /* Copyright 2017 Google Inc. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package sqltypes import ( "errors" "fmt" "reflect" "strconv" "github.com/CovenantSQL/sqlparser/dependency/querypb" ) // NullBindVariable is a bindvar with NULL value. var NullBindVariable = &querypb.BindVariable{Type: querypb.Type_NULL_TYPE} // ValueToProto converts Value to a *querypb.Value. func ValueToProto(v Value) *querypb.Value { return &querypb.Value{Type: v.typ, Value: v.val} } // ProtoToValue converts a *querypb.Value to a Value. func ProtoToValue(v *querypb.Value) Value { return MakeTrusted(v.Type, v.Value) } // BuildBindVariables builds a map[string]*querypb.BindVariable from a map[string]interface{}. func BuildBindVariables(in map[string]interface{}) (map[string]*querypb.BindVariable, error) { if len(in) == 0 { return nil, nil } out := make(map[string]*querypb.BindVariable, len(in)) for k, v := range in { bv, err := BuildBindVariable(v) if err != nil { return nil, fmt.Errorf("%s: %v", k, err) } out[k] = bv } return out, nil } // Int32BindVariable converts an int32 to a bind var. func Int32BindVariable(v int32) *querypb.BindVariable { return ValueBindVariable(NewInt32(v)) } // Int64BindVariable converts an int64 to a bind var. func Int64BindVariable(v int64) *querypb.BindVariable { return ValueBindVariable(NewInt64(v)) } // Uint64BindVariable converts a uint64 to a bind var. func Uint64BindVariable(v uint64) *querypb.BindVariable { return ValueBindVariable(NewUint64(v)) } // Float64BindVariable converts a float64 to a bind var. func Float64BindVariable(v float64) *querypb.BindVariable { return ValueBindVariable(NewFloat64(v)) } // StringBindVariable converts a string to a bind var. func StringBindVariable(v string) *querypb.BindVariable { return ValueBindVariable(NewVarChar(v)) } // BytesBindVariable converts a []byte to a bind var. func BytesBindVariable(v []byte) *querypb.BindVariable { return &querypb.BindVariable{Type: VarBinary, Value: v} } // ValueBindVariable converts a Value to a bind var. func ValueBindVariable(v Value) *querypb.BindVariable { return &querypb.BindVariable{Type: v.typ, Value: v.val} } // BuildBindVariable builds a *querypb.BindVariable from a valid input type. func BuildBindVariable(v interface{}) (*querypb.BindVariable, error) { switch v := v.(type) { case string: return StringBindVariable(v), nil case []byte: return BytesBindVariable(v), nil case int: return &querypb.BindVariable{ Type: querypb.Type_INT64, Value: strconv.AppendInt(nil, int64(v), 10), }, nil case int64: return Int64BindVariable(v), nil case uint64: return Uint64BindVariable(v), nil case float64: return Float64BindVariable(v), nil case nil: return NullBindVariable, nil case Value: return ValueBindVariable(v), nil case *querypb.BindVariable: return v, nil case []interface{}: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { lbv, err := BuildBindVariable(lv) if err != nil { return nil, err } values[i].Type = lbv.Type values[i].Value = lbv.Value bv.Values[i] = &values[i] } return bv, nil case []string: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_VARCHAR values[i].Value = []byte(lv) bv.Values[i] = &values[i] } return bv, nil case [][]byte: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_VARBINARY values[i].Value = lv bv.Values[i] = &values[i] } return bv, nil case []int: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_INT64 values[i].Value = strconv.AppendInt(nil, int64(lv), 10) bv.Values[i] = &values[i] } return bv, nil case []int64: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_INT64 values[i].Value = strconv.AppendInt(nil, lv, 10) bv.Values[i] = &values[i] } return bv, nil case []uint64: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_UINT64 values[i].Value = strconv.AppendUint(nil, lv, 10) bv.Values[i] = &values[i] } return bv, nil case []float64: bv := &querypb.BindVariable{ Type: querypb.Type_TUPLE, Values: make([]*querypb.Value, len(v)), } values := make([]querypb.Value, len(v)) for i, lv := range v { values[i].Type = querypb.Type_FLOAT64 values[i].Value = strconv.AppendFloat(nil, lv, 'g', -1, 64) bv.Values[i] = &values[i] } return bv, nil } return nil, fmt.Errorf("type %T not supported as bind var: %v", v, v) } // ValidateBindVariables validates a map[string]*querypb.BindVariable. func ValidateBindVariables(bv map[string]*querypb.BindVariable) error { for k, v := range bv { if err := ValidateBindVariable(v); err != nil { return fmt.Errorf("%s: %v", k, err) } } return nil } // ValidateBindVariable returns an error if the bind variable has inconsistent // fields. func ValidateBindVariable(bv *querypb.BindVariable) error { if bv == nil { return errors.New("bind variable is nil") } if bv.Type == querypb.Type_TUPLE { if len(bv.Values) == 0 { return errors.New("empty tuple is not allowed") } for _, val := range bv.Values { if val.Type == querypb.Type_TUPLE { return errors.New("tuple not allowed inside another tuple") } if err := ValidateBindVariable(&querypb.BindVariable{Type: val.Type, Value: val.Value}); err != nil { return err } } return nil } // If NewValue succeeds, the value is valid. _, err := NewValue(bv.Type, bv.Value) return err } // BindVariableToValue converts a bind var into a Value. func BindVariableToValue(bv *querypb.BindVariable) (Value, error) { if bv.Type == querypb.Type_TUPLE { return NULL, errors.New("cannot convert a TUPLE bind var into a value") } return MakeTrusted(bv.Type, bv.Value), nil } // BindVariablesEqual compares two maps of bind variables. func BindVariablesEqual(x, y map[string]*querypb.BindVariable) bool { return reflect.DeepEqual(&querypb.BoundQuery{BindVariables: x}, &querypb.BoundQuery{BindVariables: y}) } // CopyBindVariables returns a shallow-copy of the given bindVariables map. func CopyBindVariables(bindVariables map[string]*querypb.BindVariable) map[string]*querypb.BindVariable { result := make(map[string]*querypb.BindVariable, len(bindVariables)) for key, value := range bindVariables { result[key] = value } return result } |
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