wehub-resource-sync
58 lines
4.0 KiB
Go
58 lines
4.0 KiB
Go
// Copyright 2025 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package plpgsql
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// OpCode states the operation to be performed. Most operations have a direct analogue to a Pl/pgSQL operation, however
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// some exist only in Doltgres (specific to our interpreter implementation).
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type OpCode uint16
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const (
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// New OpCode values MUST be added to the END of this list!
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// Function OpCodes are persisted to disk, so these values MUST be stable across Doltgres versions.
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OpCode_Alias OpCode = 0 // https://www.postgresql.org/docs/15/plpgsql-declarations.html#PLPGSQL-DECLARATION-ALIAS
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OpCode_Assign OpCode = 1 // https://www.postgresql.org/docs/15/plpgsql-statements.html#PLPGSQL-STATEMENTS-ASSIGNMENT
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OpCode_Case OpCode = 2 // https://www.postgresql.org/docs/15/plpgsql-control-structures.html#PLPGSQL-CONDITIONALS
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OpCode_Declare OpCode = 3 // https://www.postgresql.org/docs/15/plpgsql-declarations.html
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OpCode_DeleteInto OpCode = 4 // https://www.postgresql.org/docs/15/plpgsql-statements.html
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OpCode_Exception OpCode = 5 // https://www.postgresql.org/docs/15/plpgsql-control-structures.html#PLPGSQL-ERROR-TRAPPING
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OpCode_Execute OpCode = 6 // Executing a standard SQL statement (expects no rows returned unless Target is specified)
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OpCode_Get OpCode = 7 // https://www.postgresql.org/docs/15/plpgsql-statements.html#PLPGSQL-STATEMENTS-DIAGNOSTICS
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OpCode_Goto OpCode = 8 // All control-flow structures can be represented using Goto
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OpCode_If OpCode = 9 // https://www.postgresql.org/docs/15/plpgsql-control-structures.html#PLPGSQL-CONDITIONALS
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OpCode_InsertInto OpCode = 10 // https://www.postgresql.org/docs/15/plpgsql-statements.html
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OpCode_Perform OpCode = 11 // https://www.postgresql.org/docs/15/plpgsql-statements.html
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OpCode_Raise OpCode = 12 // https://www.postgresql.org/docs/15/plpgsql-errors-and-messages.html
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OpCode_Return OpCode = 13 // https://www.postgresql.org/docs/15/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING
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OpCode_ScopeBegin OpCode = 14 // This is used for scope control, specific to Doltgres
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OpCode_ScopeEnd OpCode = 15 // This is used for scope control, specific to Doltgres
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OpCode_SelectInto OpCode = 16 // https://www.postgresql.org/docs/15/plpgsql-statements.html
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OpCode_UpdateInto OpCode = 17 // https://www.postgresql.org/docs/15/plpgsql-statements.html
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OpCode_ReturnQuery OpCode = 18 // https://www.postgresql.org/docs/current/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING-RETURN-NEXT
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OpCode_ForQueryInit OpCode = 19 // Initialize a cursor for FOR record IN query LOOP
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OpCode_ForQueryNext OpCode = 20 // Advance cursor and assign next row to record, or jump to exit
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// New OpCode values MUST be added to the END of this list!
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// Function OpCodes are persisted to disk, so these values MUST be stable across Doltgres versions.
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)
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// InterpreterOperation is an operation that will be performed by the interpreter.
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type InterpreterOperation struct {
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OpCode OpCode
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PrimaryData string // This will represent the "main" data, such as the query for PERFORM, expression for IF, etc.
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SecondaryData []string // This represents auxiliary data, such as bindings, strictness, etc.
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Target string // This is the variable that will store the results (if applicable)
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Index int // This is the index that should be set for operations that move the function counter
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Options map[string]string // This is extra data for operations that need it
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}
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